WO2025219501A1

WO2025219501A1 - Stabilizing compositions for polymeric materials

Info

Publication number: WO2025219501A1
Application number: PCT/EP2025/060601
Authority: WO
Inventors: Lei Zhang; Maarten VAN HAM; Robert GROENHAGEN; Ivan Vulic; Ram B. Gupta; Jian-Yang Cho; Boyu Li
Original assignee: Cytec Industries Inc
Current assignee: Cytec Industries Inc
Priority date: 2024-04-17
Filing date: 2025-04-16
Publication date: 2025-10-23
Anticipated expiration: 2026-10-17

Abstract

Provided is a stabilized polymer composition comprising a silyl-modified polymer material to be stabilized and a stabilizer composition comprising at least one hindered phenol antioxidant and at least one hindered hydroxybenzoate; and optionally at least one hindered amine light stabilizer, and/or at least one UV absorber and/or at least one moisture scavenger making it possible to enhance the thermal stability of the silyl-modified polymers based formulations, for applications such as sealants, coatings and adhesives. The present invention also relates to a use of said stabilizer composition as stabilizer in sealants, adhesives and/or coatings based on at least one silyl-modified polymer and to a method of improving thermal stability of silyl-modified polymer based adhesives, sealants and/or coatings comprising adding of at least one said stabilizer composition to a stabilized polymer composition comprising a silyl-modified polymer.

Description

STABILIZING COMPOSITIONS FOR POLYMERIC MATERIALS

FIELD OF INVENTION

The instant invention relates to stabilizing compositions. In particular, the instant invention relates to compositions that stabilize silyl-modified polymers against ultraviolet light degradation and thermal degradation.

BACKGROUND

Exposure to sunlight and other sources of ultraviolet (UV) radiation (also referred to as UV light) is known to cause degradation of a wide variety of materials. For example, polymeric materials such as plastics often discolor, lose gloss and/or become brittle as a result of prolonged exposure to UV light due primarily to a degradation of the polymer chains. Accordingly, a large body of art has been developed directed towards compositions such as UV light absorbers and stabilizers, which are capable of inhibiting such degradation in polymeric articles.

Exposure to heat is also known to cause degradation of materials, especially polymeric materials. While compositions that reduce or prevent degradation caused by heat have been developed, combining these compositions with UV light stabilizer systems has not always yielded the desired result since the UV light stabilization properties are often hindered or completely relinquished (z.e., antagonistic) when combined with the heat stabilizer composition(s).

Among polymeric materials, silyl-modified polymers, such as for example silyl- modified polyethers (also known as MS polymers), silyl-modified polyurethanes (also known as SPUR polymers), and silyl-modified acrylic polymers, are a class of polymers commonly used for many years as adhesives, sealants and coatings in a wide variety of applications, as for example in aerospace, the building and construction industry, marine, automotive and therefore that may be exposed, over a long period of time, to high temperature and/or ultraviolet (UV) radiations. Silyl-modified polymers, also referred to as modified- silane polymers, relate to silyl (also referred to as silane) terminated polymers. This class of polymers have silyl end groups.

Examples of commercial SMP products are Kaneka MS Polymers (such as MS Polymer® S203H, S303H, S227, S327, SAX220, SAX260, SAX350, SAX400, SAX510, SAX530, SAX 80, SAX590, SAX750), Wacker Chemie AG STP-E Polymers (such as GENIOSIL® STP-E10, STP-E15, STP-E30, STP-E35, SMP 100, WP1, XB502, XM20, XM25, XT50 XT55, XT120) or Evonik Polymers ST & TEGOPAC® Bond Polymers (such as Polymer ST48, ST61, ST75, ST80, ST81, TEGOPAC® Bond 150, TEGOPAC® Bond 160, TEGOPAC® Bond 251). A broad range of MS Polymer grades are commercially available, which differ in degree of functionalization (number and nature of groups attached to the backbone) and backbone structure in a wide viscosity range. These products are typically (iso)cyanate and solvent free and exhibit good characteristics, such as good temperature and UV stability and adhesion on a wide range of substrate materials.

It is known to improve the stability of silyl-modified polymers based sealants, adhesives or coatings, in particular their weathering resistance and/or heat stability, by the addition of various stabilizers, such as hindered amine light stabilizers, UV light stabilizers or antioxidants that are conventionally used to stabilize polymeric materials.

However, there remains a need for improved stabilizer compositions with new additives or combinations that can be used to further improve thermal performance of silyl- modified polymers based sealants, adhesives or coatings while maintaining UV stabilization.

This invention is believed to be an answer to the foregoing need.

SUMMARY

This summary is provided to introduce a selection of concepts that are further described below in the detailed description. This summary is not intended to identify key or essential features of the claimed subject matter, nor is it intended to be used as an aid in limiting the scope of the claimed subject matter.

The foregoing and additional objects are attained in accordance with the principles of the invention wherein the inventors detail the surprising discovery that at least one hydroxybenzoate compound when used in combination with at least one hindered phenol antioxidant advantageously provides synergistic thermal stability enhancement of the silyl- modified polymers (SMP) based formulations, for applications such as sealants, coatings and adhesives, without affecting UV performance. Thus, the invention can be used to improve thermal performance while maintaining UV stabilization when a combination of at least one hydroxybenzoate, at least one hindered phenol antioxidant, at least one hindered amine light stabilizer, and optionally at least one UV absorber are used together in the silyl- modified polymers (SMP) based formulations.

Accordingly, in one aspect, embodiments disclosed herein relate to a curable stabilized polymer composition comprising at least one silyl-modified polymer (SMP) to be stabilized and a stabilizer composition comprising at least one hindered phenol antioxidant and at least one hindered hydroxybenzoate. The stabilized polymer composition may further comprise at least one hindered amine light stabilizer and optionally at least one UV absorber. The stabilized polymer composition makes it possible to extend the life of the silyl-modified polymer-based formulations upon exposure to elevated temperature and/or to UV light.

The terms "cured/curable" and "crosslinked" have the same definition in the present invention, referring to the hardening of a polymer material by cross-linking of polymer chains. Thus, under the influence of external conditions, in particular under the influence of moisture present in the environment, the composition initially in a relatively flexible state, passes to a harder state. Generally, the crosslinking can take place by means of chemical and/or physical influences, for example with moisture, energy (heat, light or other electromagnetic radiation), and also by simply bringing the composition into contact with air or a reactive component.

In another aspect, embodiments disclosed herein relate to the use of the stabilized polymer composition in a curable adhesive, sealant and/or coating composition comprising a silyl-modified polymer, for improving the stability of the said curable adhesive, sealant and/or coating composition against thermal degradation and further against UV light degradation. Other aspects and advantages of the claimed subject matter will be apparent from the following description and the appended claims.

DETAILED DESCRIPTION

As employed above and throughout the disclosure, the following terms and definitions are provided to assist the reader. Unless otherwise defined, all terms of art, notations and other scientific terminology used herein are intended to have the meanings commonly understood by those of skill in the chemical arts. As used herein and in the appended claims, the singular forms include plural referents unless the context clearly dictates otherwise. Additionally, as used herein and in the appended claims, the disclosure of any ranges of amounts or concentrations includes the disclosure of any amount or value in the given range.

Throughout this specification the terms and substituents retain their definitions. A comprehensive list of abbreviations utilized by organic chemists (i.e. persons of ordinary skill in the art) appears in the first issue of each volume of the Journal of Organic Chemistry. The list, which is typically presented in a table entitled “Standard List of Abbreviations”, is incorporated herein by reference.

The term "hydrocarbyl" is a generic term encompassing aliphatic, alicyclic and aromatic groups having an all-carbon backbone and consisting of carbon and hydrogen atoms. In certain cases, as defined herein, one or more of the carbon atoms making up the carbon backbone may be replaced or interrupted by a specified atom or group of atoms, such as by one or more heteroatom of N, O, and/or S. Examples of hydrocarbyl groups include alkyl, cycloalkyl, cycloalkenyl, carbocyclic aryl, alkenyl, alkynyl, alkylcycloalkyl, cycloalkylalkyl, cycloalkenylalkyl, and carbocyclic aralkyl, alkaryl, aralkenyl and aralkynyl groups. Such hydrocarbyl groups can also be optionally substituted by one or more substituents as defined herein. Accordingly, the chemical groups or moieties discussed in the specification and claims should be understood to include the substituted or unsubstituted forms. The examples and preferences expressed below also apply to each of the hydrocarbyl substituent groups or hydrocarbyl-containing substituent groups referred to in the various definitions of substituents for compounds of the formulas described herein unless the context indicates otherwise. Preferred non-aromatic hydrocarbyl groups are saturated groups such as alkyl and cycloalkyl groups. Generally, and by way of example, the hydrocarbyl groups can have up to fifty carbon atoms, unless the context requires otherwise. Hydrocarbyl groups with from 1 to 30 carbon atoms are preferred. Within the sub-set of hydrocarbyl groups having 1 to 30 carbon atoms, particular examples are C1-20 hydrocarbyl groups, such as C1-12 hydrocarbyl groups (e.g. C1-6 hydrocarbyl groups or Ci-4 hydrocarbyl groups), specific examples being any individual value or combination of values selected from Ci through C30 hydrocarbyl groups.

Alkyl is intended to include linear, branched, or cyclic hydrocarbon structures and combinations thereof. Lower alkyl refers to alkyl groups of from 1 to 6 carbon atoms. Examples of lower alkyl groups include methyl, ethyl, propyl, isopropyl, butyl, s-and t-butyl and the like. Preferred alkyl groups are those of C30 or below.

Alkoxy or alkoxyalkyl refers to groups of from 1 to 20 carbon atoms of a straight, branched, cyclic configuration and combinations thereof attached to the parent structure through an oxygen. Examples include methoxy, ethoxy, propoxy, isopropoxy, cyclopropyloxy, cyclohexyloxy and the like.

Acyl refers to formyl and to groups of 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12 carbon atoms of a straight, branched, cyclic configuration, saturated, unsaturated and aromatic and combinations thereof, attached to the parent structure through a carbonyl functionality. Examples include acetyl, benzoyl, propionyl, isobutyryl, Lbutoxycarbonyl, benzyloxycarbonyl and the like. Lower acyl refers to groups containing one to six carbons.

References to "carbocyclic" or “cycloalkyl” groups as used herein shall, unless the context indicates otherwise, include both aromatic and non-aromatic ring systems. Thus, for example, the term includes within its scope aromatic, non-aromatic, unsaturated, partially saturated and fully saturated carbocyclic ring systems. In general, such groups may be monocyclic or bicyclic and may contain, for example, 3 to 12 ring members, more usually 5 to 10 ring members. Examples of monocyclic groups are groups containing 3, 4, 5, 6, 7, and 8 ring members, more usually 3 to 7, and preferably 5 or 6 ring members. Examples of bicyclic groups are those containing 8, 9, 10, 11 and 12 ring members, and more usually 9 or 10 ring members. Examples of non-aromatic carbocycle/cycloalkyl groups include c-propyl, c-butyl, c-pentyl, c-hexyl, and the like. Examples of C7 to C10 polycyclic hydrocarbons include ring systems such as norbornyl and adamantyl.

Aryl (carbocyclic aryl) refers to a 5- or 6-membered aromatic carbocycle ring containing; a bicyclic 9- or 10-membered aromatic ring system; or a tricyclic 13- or 14- membered aromatic ring system. The aromatic 6- to 14-membered carbocyclic rings include, e.g., substituted or unsubstituted phenyl groups, benzene, naphthalene, indane, tetralin, and fluorene.

Substituted hydrocarbyl, alkyl, aryl, cycloalkyl, alkoxy, etc. refer to the specific substituent wherein up to three H atoms in each residue are replaced with alkyl, halogen, haloalkyl, hydroxy, alkoxy, carboxy, carboalkoxy (also referred to as alkoxycarbonyl), carboxamido (also referred to as alkylaminocarbonyl), cyano, carbonyl, nitro, amino, alkylamino, dialkylamino, mercapto, alkylthio, sulfoxide, sulfone, acylamino, amidino, phenyl, benzyl, halobenzyl, heteroaryl, phenoxy, benzyloxy, heteroaryloxy, benzoyl, halobenzoyl, or lower alkylhydroxy.

Stabilizer Composition

As summarized above, this invention relates to a stabilized polymer composition comprising at least one silyl-modified polymer (SMP) to be stabilized and a stabilizer composition, the stabilizer composition comprising at least one hindered phenol antioxidant and at least one hindered hydroxybenzoate. Together, the at least one hindered phenol antioxidant and the at least one hindered hydroxybenzoate may be referred to as “organic stabilizers” or “organic stabilizer composition” which may also include other optional organic components described herein.

In one or more embodiments, the stabilizer composition may further comprise at least one hindered amine light stabilizer.

In one or more embodiments, the stabilizer composition may further comprise at least one UV absorber. Thus, the stabilizer composition comprising at least one hindered phenol antioxidant, at least one hindered hydroxybenzoate and optionally at least one hindered amine light stabilizer and/or at least one UV absorber provides effective thermal stability and furthermore in certain embodiments ultraviolet (UV) light stability, to the stabilized polymer composition.

In a preferred embodiment, the stabilizer composition comprises at least one hindered phenol antioxidant, at least one hindered hydroxybenzoate, at least one hindered amine light stabilizer and at least one UV absorber.

Hindered Phenol antioxidant

According to the invention, stabilizer compositions comprise at least one hindered phenol antioxidant.

In one or more embodiments, the at least one hindered phenol antioxidant compound comprises a molecular fragment according to one or more of Formula (IVa), (IVb), or (IVc):

Formula (IVa) Formula (IVb) Formula (IVc) wherein

Ris in Formulae (IVa), (IVb) and (IVc) is chosen from hydrogen and a Ci-4 hydrocarbyl;

R19 and R2o in Formulae (IVa), (IVb) and (IVc) are each individually chosen from hydrogen and a C1-C20 hydrocarbyl; and

R37 in Formulae (IVa), (IVb) and (IVc) is chosen from C1-C12 hydrocarbyl.

In one embodiment, at least one Ri8, R37 and R20 does not have an alkyl group with thioether functionality. In one embodiment, none of Ris, R37 and R20 have any alkyl group with thioether functionality.

In a preferred embodiment, Ris and R37 in Formulae (IVa), (IVb) and (IVc) are chosen from methyl and t-butyl.

In one or more embodiments, the hindered phenol antioxidant is chosen from: 1,3,5- tris(4-t-butyl-3-hydroxy-2,6-dimethylbenzyl)-l,3,5-triazine-2,4,6-(lH,3H,5H)-trione; 1,3,5- tris(3,5-di-tert-butyl-4-hydroxybenzyl)-l,3,5-triazine-2,4,6(lH,3H,5H)-trione; 1, 1 ,3-tris(2’ - methyl-4’-hydroxy-5’-/-butylphenyl)butane; triethylene glycol bis[3-(3-/-butyl-4-hydroxy- 5-methylphenyl)propionate]; 4,4’-thiobis(2-t-butyl-5-methylphenol); 2,2’ -thiodi ethylene bis[3-(3-t-butyl-4-hydroxyl-5-methylphenyl)propionate]; octadecyl 3-(3’-t-butyl-4’- hydroxy-5’-methylphenyl)propionate; tetrakismethylene(3-/-butyl-4-hydroxy-5- methylhydrocinnamate)methane; TV, TV ’-hexamethylene bis[3-(3-t-butyl-4-hydroxy-5- methylphenyl)propionamide]; di(4-tertiarybutyl-3-hydroxy-2,6-dimethyl benzyl) thiodipropionate; pentaerythritol tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate); l,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene; bis-(3,3-bis-(4'- hydroxy-3 '-tert butylphenyl) butanoic acid)-glycol ester; and octadecyl 3,5-di-(tert)-butyl-4- hydroxyhydrocinnamate; and mixtures thereof.

Hindered Hydroxybenzoate

According to the invention, stabilizer compositions comprise at least one hindered hy droxyb enzoate .

In one or more embodiments, the at least one hindered hydroxybenzoate is a compound according to Formula (III):

Formula (III) wherein R17 in Formula (III) is a Ci-Cs alkyl and Ris in Formula (III) is a C1-C24 alkyl or substituted or unsubstituted C6-C24 aryl.

In one embodiment, the hindered hydroxybenzoate compound is selected from the group consisting of 2,4-di-tert-butylphenyl 3,5-di-tert-butyl-4-hydroxybenzoate; hexadecyl

3,5-di-tert-butyl-4-hydroxybenzoate; octadecyl 3,5-di-tert-butyl-4-hydroxybenzoate; octyl

3.5-di-tert-butyl-4-hydroxybenzoate; decyl 3,5-di-tert-butyl-4-hydroxybenzoate; dodecyl

3.5-di-tert-butyl-4-hydroxybenzoate, tetradecyl 3,5-di-tert-butyl-4-hydroxybenzoate; behenyl 3,5-di-tert-butyl-4-hydroxybenzoate; 2-methyl-4,6-di-tert-butylphenyl 3,5-di-tert- butyl-4-hydroxybenzoate and butyl 3-[3-t-butyl-4-(3,5-di-t-butyl-4- hydroxybenzoyloxy)phenyl]propionate; and mixtures thereof.

In one or more embodiments, the ratio of the at least one hindered hydroxybenzoate compound to the at least one hindered phenol antioxidant compound is in the range from 10: 1 to 1 : 10, preferably in the range from 5: 1 to 1 :5, more preferably from 3: 1 to 1 :3.

In one formulation of the stabilizer composition, the composition may comprise between about 1 wt.% to about 90 wt.%, preferably about 1 wt.% to about 50 wt.% of the hindered hydroxybenzoate compound and between about 1 wt.% to about 90 wt.% preferably about 1 wt.% to about 50 wt.%, of the hindered phenol antioxidant compound, where the wt.% of each component is based on the total weight of the stabilizer composition.

In a particular embodiment, a formulation of the stabilizer composition comprises a combination of l,3,5-tris(4-t-butyl-3-hydroxy-2,6-dimethylbenzyl)-l,3,5-triazine-2,4,6- (lH,3H,5H)-trione and hexadecyl 3,5-di-tert-butyl-4-hydroxybenzoate, and preferably respectively with the ratio in the range from 5: 1 to 1 : 5.

As mentioned above, the stabilized polymer composition may optionally further comprise at least hindered amine light stabilizer. HALS compounds scavenge free radicals formed in polymeric materials when exposed to UV light.

In one or more embodiments, the at least one hindered amine light stabilizer (HALS) compound comprises a molecular fragment according to Formula (II): Formula (II) wherein R31 in Formula (II) is chosen from: hydrogen; OH; C1-C20 hydrocarbyl; - CH2CN; C1-C12 acyl; and Ci-Cis alkoxy; R38 in Formula (II) is chosen from: hydrogen; and Ci-Cs hydrocarbyl; and each of R29, R30, R32, and R33 in Formula (II) is independently chosen from C1-C20 hydrocarbyl, or R29 and R30 and/or R32 and R33 in Formula (II) taken together with the carbon to which they are attached form a C5-C10 cycloalkyl; or Formula (Ila) wherein m in Formula (Ila) is an integer from 1 to 2; R39 is chosen from: hydrogen; OH; C1-C20 hydrocarbyl; -CH2CN; C1-C12 acyl; and Ci-Cis alkoxy; and each of G1-G4 in Formula (Ila) is independently chosen from C1-C20 hydrocarbyl.

Examples of the HALS compound include bis(2,2,6,6-tetramethylpiperidin-4-yl) sebacate; bis(2,2,6,6-tetramethylpiperidin-4-yl)succinate; bis(l,2,2,6,6- pentamethylpiperidin-4-yl)sebacate; bis(l-octyloxy-2,2,6,6-tetramethylpiperidin-4- yl)sebacate; bis(l,2,2,6,6-pentamethylpiperidin-4-yl) n-butyl 3,5-di-tert-butyl-4- hydroxybenzylmal onate; a condensate of 1 -(2 -hydroxy ethyl)-2, 2,6, 6-tetramethyl-4- hydroxypiperidine and succinic acid; 2,2,6,6-tetramethylpiperidin-4-yl stearate; 2, 2,6,6- tetramethylpiperidin-4-yl dodecanate; l,2,2,6,6-pentamethylpiperidin-4-yl stearate; l,2,2,6,6-pentamethylpiperidin-4-yl dodecanate; a condensate of N, N'-bis(2, 2,6,6- tetramethylpiperidin-4-yl)hexamethylenediamine and 4-tert-octylamino-2,6-di chi oro-1, 3,5- triazine; tris(2,2,6,6-tetramethylpiperidin-4-yl) nitrilotriacetate; tetrakis(2, 2,6,6- tetramethylpiperidin-4-yl)- 1,2,3,4-butanetetracarboxylate; 4-benzoyl-2, 2,6,6- tetramethylpiperidine; 4-stearyloxy-2,2,6,6-tetramethylpiperidine; bis(l,2,2,6,6- pentamethylpiperidyl)-2-n-butyl-2-(2 -hydroxy-3, 5-di-tert-butylbenzyl)malonate; 3-n-octyl- 7,7,9,9-tetramethyl-l,3,8-triazaspiro[4.5]decan-2,4-dione; bis(l-octyloxy-2, 2,6,6- tetramethylpiperidyl)sebacate; bis(l-octyloxy-2,2,6,6-tetramethylpiperidyl)succinate; a condensate of N,N'-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexamethylenediamine and 4- morpholino-2,6-dichloro-l,3,5-triazine (commercially available from Syensqo as CYASORB® UV-3346); a condensate of N,N'-bis(2,2,6,6-tetramethylpiperidin-4- yl)hexamethylenediamine and 4-morpholino-2,6-dichloro-l,3,5-triazine, methylated (commercially available from Syensqo as CYASORB® UV-3529); a condensate of 2-chloro-

4.6-bis(4-n-butylamino-2,2,6,6-tetramethylpiperidyl)-l,3,5-triazine and 1 ,2-bis(3- aminopropylamino)ethane; a condensate of 2-chl oro-4, 6-bis(4-n-butylamino- 1,2, 2,6,6- pentamethylpiperidyl)-l,3,5-triazine and l,2-bis-(3-aminopropylamino)ethane; N2,N2'- (Ethane-l,2-diyl)bis(N2-(3-((4,6-bis(butyl(l,2,2,6,6-pentamethylpiperidin-4-yl)amino)-

1.3.5-triazin-2-yl)amino)propyl)-N4,N6-dibutyl-N4,N6-bis(l,2,2,6,6-pentamethylpiperidin- 4-yl)-l,3,5-triazine-2,4,6-triamine) (commercially available as CHIMASSORB™ 119); a condensate of N,N'-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexamethylenediamine, N-butyl-

2.2.6.6-tetramethyl-4-piperidinamine, di-n-butyl amine, and 2,4,6-trichloro-l,3,5-triazine

(commercially available as CHIMASSORB™ 2020); 8-acetyl-3-dodecyl-7,7,9,9- tetramethyl-1, 3, 8-triazaspiro[4.5]decane-2, 4-dione; 3 -dodecyl- 1 -(2, 2,6,6- tetramethylpiperidin-4-yl)pyrrolidin-2, 5-dione; 3 -dodecyl- l-(l-ethanoyl-2, 2,6,6- tetramethylpiperidin-4-yl)pyrrolidin-2, 5-dione; 3-dodecyl-l-(l,2,2,6,6- pentamethylpiperidin-4-yl)pyrrolidine-2, 5-dione; a mixture of 4-hexadecyloxy- and 4- stearyloxy-2,2,6,6-tetramethylpiperidine; a condensate of N, N'-bis(2, 2,6,6- tetramethylpiperidin-4-yl)hexamethylenediamine and 4-cyclohexylamino-2,6-dichloro-

1.3.5-triazine; a condensate of l,2-bis(3-aminopropylamino)ethane, 2,4,6-trichloro-l,3,5- triazine and 4-butylamino-2,2,6,6-tetramethylpiperidine; 2-undecyl-7,7,9,9-tetramethyl-l- oxa-3,8-diaza-4-oxospiro[4.5]decane; oxo-piperanzinyl-triazines; a reaction product of 7,7,9,9-tetramethyl-2-cycloundecyl-l-oxa-3,8-diaza-4-oxospiro[4.5]decane and epichlorohydrin; tetrakis(2,2,6,6-tetramethyl-4-piperidyl)butane-l,2,3,4-tetracarboxylate;

1,2,3,4-butanetetracarboxylic acid, tetrakis(l,2,2,6,6-pentamethyl-4-piperidinyl) ester;

1,2,3,4-butanetetracarboxylic acid, l,2,2,6,6-pentamethyl-4-piperidinyl tridecyl ester;

1.2.3.4-butanetetracarboxylic acid, 2,2,6,6-tetramethyl-4-piperidinyl tridecyl ester; 1,2,3,4- butanetetracarboxylic acid, polymer with 2,2,6,6-tetramethyl-2,4,8,10-tetraoxaspiro[5.5]- undecane-3,9-diethanol,l,2,2,6,6-pentamethyl-4-piperdinyl ester; 1,2,3,4- butanetetracarboxylic acid, polymer with 2,2,6,6-tetramethyl-2,4,8,10-tetraoxaspiro[5.5]- undecane-3,9-di ethanol, 2,2,6,6-tetramethyl-4-piperdinyl ester; bis(l-undecanoxy-2, 2,6,6- tetramethylpiperidin-4-yl)carbonate; l-(2-hydroxy-2-methylpropoxy)-2,2,6,6-tetramethyl- 4-piperdinol; l-(2-hydroxy-2-methylpropoxy)-4-octadecanoyloxy-2, 2,6,6- tetramethylpiperidine; l-(4-octadecanoyloxy-2, 2, 6, 6-tetramethylpiperi din- l-yloxy)-2- octadecanoyloxy-2-methylpropane; l-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-piperdinol; a reaction product of l-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-piperdinol and dimethyl succinate; 2,2,4,4-tetramethyl-7-oxa-3,20-diazadispiro[5.1.11 ,2]heneicosan-21- one; the ester of 2,2,6,6-tetramethyl-4-piperidinol with higher fatty acids; 3 -dodecyl- 1- (2,2,6,6-tetramethyl-4-piperidyl)pyrrolidine-2,5-dione; lH-Pyrrole-2, 5-dione, 1 -octadecyl-, polymer with (l-methylethenyl)benzene and l-(2,2,6,6-tetramethyl-4-piperidinyl)-lH- pyrrole-2, 5-dione; piperazinone, l,l l"-[l,3,5-triazine-2,4,6-triyltris[(cyclohexylimino)- 2,l-ethanediyl]]tris[3,3,5,5-tetramethyl-; piperazinone, l,l',l"-[l,3,5-triazine-2,4,6- triyltris[(cyclohexylimino)-2,l-ethanediyl]]tris[3,3,4,5,5-pentamethyl-; 2-[(2- hydroxyethyl)amino]-4,6-bis[N-(l -cyclohexyloxy -2, 2, 6, 6-tetramethylpiperi din-4- yl)butylamino-l,3,5-triazine; propanedioic acid, [(4-methoxyphenyl)-methylene]-bis- (l,2,2,6,6-pentamethyl-4-piperidinyl) ester; tetrakis(2,2,6,6-tetramethylpiperidin-4-yl)-

1.2.3.4-butanetetracarboxylate; benzenepropanoic acid, 3,5-bis(l,l-dimethylethyl)-4- hydroxy-, l-[2-[3-[3,5-bis(l,l-dimethylethyl)-4-hydroxyphenyl]-l-oxopropoxy]ethyl]- 2,2,6,6-tetramethyl-4-piperidinyl ester; N-(l -octyloxy-2, 2, 6, 6-tetramethylpiperi din-4-yl)- N'-dodecyloxalamide; l,5-dioxaspiro{5,5}undecane-3,3-dicarboxylic acid, bis(l,2,2,6,6- pentamethyl-4-piperidinyl): l,5-dioxaspiro{5,5}undecane-3,3-dicarboxylic acid, bis(2,2,6,6-tetramethyl-4-piperidinyl); 1 tetrakis(l,2,2,6,6-pentamethylpiperidin-4-yl)- 1,2,3,4-butanetetracarboxylate; mixture of 2,2,4,4-tetramethyl-21-oxo-7-oxa-3.20- diazaspiro(5.1.11.2)-heneicosane-20-propanoic acid-dodecylester and 2,2,4,4-tetramethyl- 21-oxo-7-oxa-3.20-diazaspiro(5.1.11.2)-heneicosane-20-propanoic acid-tetradecylester; lH,4H,5H,8H-2,3a,4a,6,7a,8a-hexaazacyclopenta[def]fluorene-4,8-dione, hexahydro-2, 6- bis(2,2,6,6-tetramethyl-4-piperidinyl)-; polymethyl[propyl-3-oxy(2',2',6',6'-tetramethyl-4,4'- piperidinyl)] siloxane; polymethyl[propyl-3-oxy(r,2',2',6',6'-pentamethyl-4,4'- piperidinyl)] siloxane; copolymer of methylmethacrylate with ethyl acrylate and 2, 2,6,6- tetramethylpiperidin-4-yl acrylate; copolymer of mixed C20 to C24 alpha-olefins and (2, 2,6,6- tetramethylpiperidin-4-yl)succinimide; 1,2,3,4-butanetetracarboxylic acid, polymer with P,P,P',P'-tetramethyl-2,4,8,10-tetraoxaspiro[5.5]undecane-3,9-diethanol, 1, 2, 2,6,6- pentamethyl-4-piperidinyl ester; 1,2,3,4-butanetetracarboxylic acid, polymer with 0,|3,|3',|3'- tetramethyl-2,4,8,10-tetraoxaspiro[5.5]undecane-3,9-diethanol, 2,2,6,6-tetramethyl-4- piperidinyl ester copolymer; 1,3-benzenedicarboxamide, N,N'-bis(2,2,6,6-tetramethyl-4- piperidinyl; 1 , l'-( 1 , 10-dioxo- 1 , 10-decanediyl)-bis(hexahydro-2,2,4,4,6- pentamethylpyrimidine; ethane diamide, N-(l-acetyl-2,2,6,6-tetramethylpiperidinyl)-N'- dodecyl; formamide, N,N'-l,6-hexanediylbis[N-(2,2,6,6-tetramethyl-4-piperidinyl); D- glucitol, 1,3 :2,4-bis-O-(2,2,6,6-tetramethyl-4-piperidinylidene)-; 2,2,4,4-tetramethyl-7-oxa- 3,20-diaza-21-oxo-dispiro[5.1.11.2]heneicosane; propanamide, 2-methyl-N-(2,2,6,6- tetramethyl-4-piperidinyl)-2-[(2,2,6,6-tetramethyl-4-piperidinyl)amino]-; 7-oxa-3,20- diazadispiro[5.1.11.2]heneicosane-20-propanoic acid, 2,2,4,4-tetramethyl-21-oxo-, dodecyl ester; N-(2,2,6,6-tetramethylpiperidin-4-yl)-P-aminopropionic acid dodecyl ester; N- (2,2,6,6-tetramethylpiperidin-4-yl)-N'-aminooxalamide; propanamide, N-(2, 2,6,6- tetramethyl-4-piperidinyl)-3-[(2,2,6,6-tetramethyl-4-piperidinyl)amino]-;; 3-dodecyl-l-(l- ethanoyl-2,2,6,6-pentamethylpiperidin-4-yl)pyrrolidine-2,5-dione; 1, l'-(l,2- ethanediyl)bis(3,3,5,5-tetramethylpiperazinone); ; N¹-(P-hydroxyethyl)3, 3 -pentam ethylene- 5,5 -dimethylpiperazin-2-one; N¹-tert-octyl-3,3,5,5-tetramethyl-diazepin-2-one; N^J-tert- octyl-3,3-pentamethylene-5,5-hexamethylene-diazepin-2-one; N^tert-octyl-S^- pentamethylene-5,5-dimethylpiperazin-2-one; trans-l,2-cyclohexane-bis-(N¹-5,5-dimethyl- 3,3-pentamethylene-2-piperazinone; trans-1, 2-cyclohexane-bis-(N¹-3, 3,5,5- dispiropentamethylene-2-piperazinone); N sopropyl-l^-diazadispiro- (3,3,5,5)pentamethylene-2-piperazinone; N sopropyl-l^-diazadispiro-S^- pentamethylene-5,5-tetramethylene-2-piperazinone; N sopropyl-S^-dimethyl-S^- pentamethylene-2-piperazinone; trans-l,2-cyclohexane-bis-N¹-(dimethyl-3,3- pentamethylene-2-piperazinone); N^octyl-S^-dimethyl-S^-pentamethylene-l^-diazepin- 2-one; N¹-octyl-l,4-diazadispiro-(3,3,5,5)pentamethylene-l,5-diazepin-2-one; and mixtures thereof.

Preferably, the HALS compound may be selected from a condensate of N,N'- bis(2,2,6,6-tetramethylpiperidin-4-yl)hexamethylenediamine and 4-morpholino-2,6- dichloro-1,3,5- triazine (commercially available from Syensqo as CYASORB® UV-3346); a condensate of N,N'-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexamethylenediamine and 4- morpholino-2,6-dichloro-l,3,5-triazine, methylated (commercially available from Syensqo as CYASORB® UV-3529);N2,N2'-(ethane-l,2-diyl)bis(N2-(3-((4,6-bis(butyl(l,2,2,6,6- pentamethylpiperidin-4-yl)amino)-l, 3, 5-tri azin-2 -yl)amino)propyl)-N4,N6-dibutyl-N4,N6- bis(l,2,2,6,6-pentamethylpiperidin-4-yl)-l,3,5-triazine-2,4,6-triamine) (commercially available as CHIMASSORB™ 119); a condensate of N,N'-bis(2,2,6,6-tetramethylpiperidin- 4-yl)hexamethylenediamine, N-butyl-2,2,6,6-tetramethyl-4-piperidinamine, di-n-butyl amine, and 2,4,6-trichloro-l,3,5-triazine (commercially available as CHIMASSORB™ 2020) ; and mixtures thereof.

UV Absorber

As mentioned above, the stabilizer composition may optionally further comprise at least one ultraviolet light absorber (UV absorber). In one or more embodiments, the at least one UV absorber can be selected from the group consisting of ortho-hydroxy tris-aryl-s- triazine compounds; 2-(2’-hydroxyphenyl) benzotriazole compounds; 2- hydroxybenzophenone compounds; benzoxazinone compounds; and an oxanilide, and mixtures thereof.

Particularly preferred ortho-hydroxy tris-aryl-s-triazine compounds may be 2-(2’- hydroxyphenyl)-l,3,5-triazine compounds according to Formula (I):

Formula (I) wherein R34 and R35 are the same or different and are independently chosen from: a Ce-Cio aryl group, wherein the Ce-Cio aryl group is optionally substituted at from 1 to 3 substitutable positions with one or more group chosen from OH, halogen, Ci- C12 alkyl, C1-C12 alkoxy, C1-12 alkoxyester, C2-12 alkanoyl, or phenyl, wherein the phenyl is optionally substituted at from 1 to 3 substitutable positions with one or more group chosen from: hydroxyl, halogen, C1-12 alkyl, C1-12 alkoxy, C1-12 alkoxyester, or C2-12 alkanoyl; mono- or di-Ci-Cn hydrocarbyl-substituted amino; C2-C12 alkanoyl;

C1-C12 alkyl; Ci-

C10 acyl; or

C1-C10 alkoxyl; and

R36 is a substituent that is the same or different at from 0 to 4 positions of the phenoxy portion of Formula (I) and is independently chosen from hydroxyl, halogen, C1-C12 alkyl, C1-C12 alkoxy, C1-C12 alkoxyester, C2-C12 alkanoyl; phenyl; or C1-C12 acyl.

In particular, the ortho-hydroxy tris-aryl-s-triazine compound may be selected from 2- (2’-hydroxyphenyl)-l,3,5-triazine compound chosen from: 4,6-bis-(2,4-dimethylphenyl)-2- (2-hydroxy-4-octyloxyphenyl)-s-triazine; 4,6-bis-(2,4-dimethylphenyl)-2-(2-hydroxy-4- isooctyloxyphenyl)-s-triazine; 4,6-bis-(2,4-dimethylphenyl)-2-(2,4-dihydroxyphenyl)-s- triazine; 2,4-bis(2,4-dihydroxyphenyl)-6-(4-chlorophenyl)-s-triazine; 2,4-bis[2-hydroxy-4- (2-hydroxy-ethoxy)phenyl]-6-(4-chlorophenyl)-s-triazine; 2,4-bis[2-hydroxy-4-(2-hydroxy- 4-(2-hydroxy-ethoxy)phenyl]-6-(2,4-dimethylphenyl)-s-triazine; 2,4-bis[2-hydroxy-4-(2- hydroxyethoxy)phenyl]-6-(4-bromophenyl)-s-triazine; 2,4-bis[2-hydroxy-4-(2- acetoxy ethoxy )phenyl]-6-(4-chlorophenyl)-s-triazine; 2,4-bis(2,4-dihydroxyphenyl)-6-(2,4- dimethylphenyl)-s-triazine; 2-(4,6-diphenyl-l,3,5-triazin-2-yl-)-5-(hexyl)oxyl-phenol; 2,4- bis(2-hydroxy-4-butyloxyphenyl)-6-(2,4-bis-butyloxyphenyl)-s-triazine; 2,4-bis(2,4- dimethylphenyl)-6-[2-hydroxy-4-[(octyloxycarbonyl)ethylideneoxy]phenyl]-s-tri azine;

2.4.6-tris[2-hydroxy-4-[(octyloxycarbonyl)ethylideneoxy]phenyl]-s-triazine; 2,4,6-tris(2- hydroxy-4-octyloxy-phenyl)-l,3,5-triazine; 2,4-bis[2-hydroxy-4-(2-hydroxy-4-(2- hydroxyethoxy)phenyl]-6-(2,4-dimethylphenyl)-s-triazine; 4,6-bis-(2,4-dimethylphenyl)-2- (2-hydroxy-4-isooctyloxyphenyl)-s-triazine; 2,4-bis(4-biphenylyl)-6-[2-hydroxy-4- [(octyloxycarbonyl)ethylideneoxy]phenyl]-s-triazine; 2,4-bis(4-biphenylyl)-6-[2-hydroxy- 4-(2-ethylhexyloxy)phenyl]-s-triazine; 2-phenyl-4-[2-hydroxy-4-(3-sec-butyloxy-2- hydroxypropyloxy)phenyl]-6-[2-hydroxy-4-(3-sec-amyloxy-2-hydroxypropyloxy)phenyl]- s-triazine; 2,4-bis(2,4-dimethylphenyl)-6-[2-hydroxy-4(-3-benzyloxy-2- hydroxypropyloxy)phenyl]-s-triazine; 2,4-bis(2-hydroxy-4-n-butyloxyphenyl)-6-(2,4-di-n- butyloxyphenyl)-s-triazine; 2,4-bis(2,4-dimethylphenyl)-6-[2-hydroxy-4-(3-nonyloxy-2- hydroxypropyloxy)-5-a-cumylphenyl]-s-triazine; methylenebis-{2,4-bis(2,4- dimethylphenyl)-6-[2-hydroxy-4-(3-butyloxy-2-hydroxypropoxy)phenyl]-s-tri azine; methylene bridged dimer mixture bridged in the 3:5', 5:5' and 3:3' positions in a 5:4:1 ratio;

2.4.6-tris(2-hydroxy-4-isooctyloxycarbonyliso-propylideneoxy-phenyl)-s-triazine; 2,4- bis(2,4-dimethylphenyl)-6-(2-hydroxy-4-hexyloxy-5-a-cumylphenyl)-s-triazine; 2-(2,4,6- trimethylphenyl)-4,6-bis[2-hydroxy-4-(3-butyloxy-2-hydroxypropyloxy)phenyl]-s-tri azine;

2.4.6-tris[2-hydroxy-4-(3-sec-butyloxy-2-hydroxypropyloxy)-phenyl]-s-triazine; mixture of

4.6-bis-(2,4-dimethylphenyl)-2-(2-hydroxy-4-(3-dodecyloxy-2-hydroxypropoxy)phenyl)-s- triazine and 4,6-bis-(2,4-dimethylphenyl)-2-(2-hydroxy-4-(3-tridecyloxy-2- hydroxypropoxy)phenyl)-s-triazine; 4,6-bis-(2,4-dimethylphenyl)-2-(2-hydroxy-4(3-(2- ethylhexyloxy)-2-hydroxypropoxy)-phenyl)-s-triazine; 4,6-diphenyl-2-(4-hexyloxy-2- hydroxyphenyl)-s-triazine; 2-(4,6-diphenyl-l,3,5-triazin-2-yl)-5-[2-(2- ethylhexanoyloxy)ethoxy]phenol; 2,4,6-tris(2-hydroxy-4-octyloxyphenyl)-l,3,5-triazine; propanoic acid, 2,2’,2”-[l,3,5-triazine-2,4,6-triyltris[(3-hydroxy-4, l-phenylene)oxy]]tris- 1,1’, 1” -tri octyl ester; propanoic acid, 2-[4-[4,6-bis([l,r-biphenyl]-4-yl)-l,3,5-triazin-2yl]- 3-hydroxyphenoxyl]-isooctyl ester; and combinations thereof.

The 2-(2'-hydroxyphenyl)benzotriazole may be selected from 2-(2'-hydroxy-5'- methylphenyl)benzotriazole, 2-(2'-hydroxy-5'-te/7-butylphenyl)benzotri azole, 2-(2'- hydroxy-3'-methyl-5'-/c 7-biitylphenyl)benzotri azole, 2-(2'-hydroxy-5'- cyclohexylphenyl)benzotriazole, 2-(2'-hydroxy-3',5'-dimethylphenyl)benzotriazole, 2-(2'- hydroxy-5'-/c 7-butylphenyl)-5-chloro-benzotri azole, 2-(2'-hydroxy-5'-/c 7- octylphenyl)benzotriazole, 2-(3',5'-di-tert-butyl-2'-hydroxyphenyl)-5-chlorobenzotri azole, 2-(3',5'-di-tert-amyl-2'-hydroxyphenyl)benzotriazole, 2-(3',5'-bis(a,a-dimethylbenzyl)-2'- hydroxyphenyl)benzotriazole, 2-(3'-tert-butyl-2'-hydroxy-5'-(2- octyloxycarbonylethyl)phenyl)benzotriazole, 2,2'-methylenebis[4-(l,l,3,3- tetramethylbutyl)-6-benzotriazole-2-ylphenol], the transesterification product of 2-[3'-/c 7- butyl-5'-(2-methoxycarbonylethyl)-2'-hydroxyphenyl]-2H-benzotriazole with polyethylene glycol 300 (TINUVIN™ 1130), 2-[2'-hydroxy-3'-(a,a-dimethylbenzyl)-5'-(l, 1,3,3- tetramethylbutyl)phenyl]benzotriazole, 5-trifluoromethyl-2-(2-hydroxy-3-a-curnyl-5-/c 7- octylphenyl)benzotriazole, 2-(2'-hydroxy-5'-(2-hydroxyethyl)phenyl)benzotriazole, 2-(2'- hydroxy-5'-(2-methacryloyloxyethyl)phenyl)benzotriazole, 2-(2'-hydroxy-3'-tert-butyl-5'- methylphenyl)-5-chlorobenzotriazole, 2-(3'-sec-butyl-5'-tert-butyl-2'- hydroxyphenyl)benzotriazole, 2-(3',5'-di-tert-butyl-2'-hydroxyphenyl)benzotri azole, 2-(3'- dodecyl-5'-methyl-2'-hydroxyphenyl)benzotriazole, 2-(3'-tert-butyl-5'-(2- octyloxycarbonylethyl)-2'-hydroxyphenyl)-5-chlorobenzotriazole, 2-(5'-methyl-2'- hydroxyphenyl)benzotriazole, or 2 (5'-tert-butyl-2'-hydroxyphenyl)benzotriazole; and combinations thereof.

The 2-hydroxybenzophenone may be selected from 2-hydroxy-4- methoxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2-hydroxy-4- octyl oxyb enzophenone, 2, 2'-dihydroxy -4, 4'-di -methoxybenzophenone, 2,2'- dihydroxybenzophenone, 2,2',4,4'-tetrahydroxybenzophenone, 2,2'-dihydroxy-4,4'- dimethoxybenzophenone, 2, 2'-dihydroxy-4,4'-di ethoxybenzophenone, 2,2'-dihydroxy-4,4'- dipropoxybenzophenone, 2,2'-dihydroxy-4,4'-dibutoxybenzophenone, 2,2'-dihydroxy-4- methoxy-4'-ethoxybenzophenone, 2,2'-dihydroxy-4-methoxy-4'-propoxybenzophenone,

2,2'-dihydroxy-4-methoxy-4'-butoxybenzophenone, 2,2'-dihydroxy-4-ethoxy-4'- propoxybenzophenone, 2,2'-dihydroxy-4-ethoxy-4'-butoxybenzophenone, 2,3 '-dihy droxy - 4,4'-dimethoxybenzophenone, 2,3'-dihydroxy-4-methoxy-4'-butoxybenzophenone, 2- hydroxy-4,4',5'-trimethoxybenzophenone, 2-hydroxy-4,4',6'-tributoxybenzophenone, 2- hydroxy-4-butoxy-4',5'-dimethoxybenzophenone, 2-hydroxy-4-ethoxy-2',4'- dibutylbenzophenone, 2-hydroxy-4-propoxy-4',6'-di chlorobenzophenone, 2-hydroxy-4- propoxy-4',6'-dibromobenzophenone, 2,4-dihydroxybenzophenone, 2-hydroxy-4- ethoxyb enzophenone, 2-hydroxy-4-propoxybenzophenone, 2-hydroxy-4- butoxyb enzophenone, 2-hydroxy-4-methoxy-4'-methylbenzophenone, 2-hydroxy-4- methoxy-4'-ethylbenzophenone, 2-hydroxy-4-methoxy-4'-propylbenzophenone, 2-hy droxy - 4-methoxy-4'-butylbenzophenone, 2-hy droxy -4-methoxy-4'-tert-butylbenzophenone, 2- hydroxy-4-methoxy-4'-chlorobenzophenone, 2-hydroxy-4-methoxy-2'- chlorobenzophenone, 2-hydroxy-4-methoxy-4'-bromobenzophenone, 2-hydroxy-4,4'- dimethoxybenzophenone, 2-hy droxy -4, 4'-dimethoxy-3 -methylbenzophenone, 2-hy droxy - 4,4'-dimethoxy-2'-ethylbenzophenone, 2-hydroxy-4,4',5'-trimethoxybenzophenone, 2- hydroxy-4-ethoxy-4'-methylbenzophenone, 2-hydroxy-4-ethoxy-4'-ethylbenzophenone, 2- hydroxy-4-ethoxy-4'-propylbenzophenone, 2-hydroxy-4-ethoxy-4'-butylbenzophenone, 2- hydroxy-4-ethoxy-4'-methoxybenzophenone, 2-hy droxy-4,4'-di ethoxybenzophenone, 2- hydroxy-4-ethoxy-4'-propoxybenzophenone, 2-hydroxy-4-ethoxy-4'-butoxybenzophenone, 2-hydroxy-4-ethoxy-4'-chlorobenzophenone, or 2-hydroxy-4-ethoxy-4'- bromobenzophenone; and combinations thereof.

The benzoxazinone may be selected from 2-methyl-3,l-benzoxazin-4-one, 2 butyl-3,1- benzoxazin-4-one, 2-phenyl-3,l-benzoxazin-4-one, 2-(l- or 2-naphthyl)-3,l-benzoxazin-4- one, 2-(4-biphenyl)-3,l-benzoxazin-4-one, 2 p nitrophenyl-3,l-benzoxazin-4-one, 2 m nitrophenyl-3,l-benzoxazin-4-one, 2 p benzoylphenyl-3,l-benzoxazin-4-one, 2 p methoxyphenyl-3,l-benzoxazin-4-one, 2 O methoxyphenyl-3,l-benzoxazin-4-one, 2 cyclohexyl-3,l-benzoxazin-4-one, 2-p-(or m-)phthalimidephenyl-3,l-benzoxazin-4-one, N- phenyl-4-(3,l-benzoxazin-4-one-2-yl)phthalimide, N-benzoyl-4-(3,l-benzoxazine-4-one-2- yl)aniline, N-benzoyl-N-methyl-4-(3, l-benzoxazin-4-one-2-yl)-aniline, 2-[p-(N- phenylcarbamonyl)phenyl]-3,l-benzoxazin-4-one, 2 [p-(N-phenyl N- methylcarbamoyl)phenyl]-3,l-benzoxazin-4-one, 2,2' bis(3,l-benzoxazin-4-one), 2,2' ethylenebis(3,l-benzoxazin-4-one), 2,2' tetramethylenebis(3,l-benzoxazin-4-one), 2,2' hexamethylenebis(3, l-benzoxazin-4-one), 2,2'-decamethylenebis(3, l-benzoxazin-4-one), 2,2'-p-phenylenebis(3,l-benzoxazin-4-one), 2,2' m phenylenebis(3,l-benzoxazin-4-one), 2,2' (4,4'-diphenylene)bis(3,l-benzoxazin-4-one), 2,2' (2,6-or l,5-naphthalene)bis(3,l- benzoxazin-4-one), 2,2'-(2-methyl-p-phenylene)bis(3, l-benzoxazin-4-one), 2,2'-(2-nitro-p- phenylene)bis(3,l-benzoxazin-4-one), 2,2'-(2-chloro-p-phenylene)bis(3,l-benzoxazin-4- one), 2,2' (1,4 cyclohexylene)bis(3,l-benzoxazin-4-one), N-p-(3,l-benzoxazin-4-on-2- yl)phenyl, 4 (3,1 benzoxazin-4-on-2-yl)phthalimide, N-p-(3,l-benzoxazin-4-on-2- yl)benzoyl, 4 (3,1 benzoxazin-4-on-2-yl)aniline, 1,3,5 tri(3,l-benzoxazin-4-on-2- yl)benzene, 1,3,5 tri(3,l benzoxazin-4-on-2-yl)naphthalene, or 2,4,6-tri(3,l-benzoxazin-4- on-2-yl)naphthalene; and combinations thereof.

In embodiments where the stabilizer composition may comprise an optional hindered amine light stabilizer, the hindered amine light stabilizer may be present in an amount between about 1 wt.% to about 90 wt.%, preferably about 1 wt.% to about 70 wt. %, based on the total weight of the organic stabilizer composition.

In embodiments where the stabilizer composition may comprise an optional UV absorber, the UV absorber may be present in an amount between about 1 wt.% to about 90 wt.%, preferably about 1 wt.% to about 50 wt. %, based on the total weight of the organic stabilizer composition.

In one or more embodiments, the stabilizer composition may optionally further comprise at least one moisture scavenger. Suitable moisture scavenger may be silanes, such as vinyltrimethoxysilane, propyltrimethoxysilane, vinyltriethoxysilane, g- methacryloyloxypropylmethyldimethoxysilane and y- acryloxyl oxypropylmethyltri ethoxysilane, preferably propyltrimethoxysilane. In embodiments where the stabilizer composition may comprise an optional moisture scavenger, the moisture scavenger may be present in an amount between about 1 wt.% to about 90 wt.%, preferably about 5 wt.% to about 80 wt. %, based on the total weight of the organic stabilizer composition.

Other additives

Suitable other additives may be nucleating agents, metallic stearates, reinforcing agents, lubricants, rheology agents, catalysts, leveling agents, optical brighteners, anti-static agents, blowing agents, flame retardants, dyes, pigments, thioesters, hydroxylamines, antioxidants, hindered phenols, phosphites, phosphonites, benzofuranones, nitrones, and mixtures thereof. Examples of such co-additives include but are not limited to any of those disclosed in U.S. Publication Nos. 2004/0152807; 2009/0085252; 2012/0146257; and 2013/0145962, which are expressly incorporated herein by reference, or known to those skilled in the art.

Stabilized Polymer Compositions

As summarized above, this invention relates to a curable stabilized polymer composition comprising at least one silyl-modified polymer (SMP) to be stabilized and a stabilizer composition, the stabilizer composition comprising at least one hindered phenol antioxidant and at least one hindered hydroxybenzoate, and optionally at least one hindered amine light stabilizer and/or at least one UV absorber and/or at least one moisture scavenger.

In the presence of atmospheric moisture, polymers having silyl groups with hydrolysable substituents, such as alkoxy groups, are able to condensate with one another at room temperature, resulting thus in cured or crosslinked polymers. The terms "cured/curable" and "crosslinked" have the same definition in the present invention, referring to the hardening of a polymer material by cross-linking of polymer chains. Depending on the content of silyl groups with hydrolyzable substituents and the structure of these silyl groups, long-chain polymers (thermoplastics), three-dimensional networks (elastomers) or highly crosslinked systems (thermosets) can be formed during this process. The polymers generally have an organic backbone which carries silyl groups at the ends. The organic backbone can be for example polyurethanes, polyesters, polyethers.

The stabilizer compositions according to the present disclosure are suitable for use in stabilizing silyl-modified polymers (SMP) subject to effects of exposure to elevated temperature and/or to UV light, which may lead to deterioration of the performance of the silyl-modified polymers based formulations, such as sealants, coatings and adhesives, e.g. mechanical properties, adhesion, chemical resistance, and rheological properties.

A stabilizer composition may be combined with a material to be stabilized, e.g., an organic polymeric material, in any manner known in the art, thus forming a composition that is a stabilized material (also referred to herein as a stabilized polymer composition or a stabilized composition). In the present invention, the material to be stabilized is a silyl- modified polymer. As noted above, typically, the silyl-modified polymer may be selected from organic polymers, in particular based on polyethers, polyurethanes, polyureas and/or acrylic polymers or copolymers, having at least one terminal, crosslinkable hydrolysable silyl group.

Preferably, the at least one silyl-modified polymer to be stabilized according to the disclosure, to which the stabilizer composition may be combined with, comprise, but are not limited to the silyl-modified polymers having at least one end group represented by general formula 1 :

-A-(R~~~SiXYZ)_n (1), wherein

A is a divalent linking group comprising at least one heteroatom,

R is a divalent hydrocarbon residue with C1-C12 atoms, and

X, Y, Z are substituents on the Si atom and are, independently of one another, Ci- Cs alkyl, hydroxyl, Ci-Cs alkoxy or Ci-Cs acyloxy groups, wherein at least one of the residues X, Y, Z is a hydroxyl, Ci-Cs alkoxy or Ci-Cs acyloxy group, and n is 1-3, and wherein at least one polymer is a polyether, polyurethane, polyurea, hydrocarbon polymer or a poly(meth)acrylic acid ester.

The residue R can be a straight chained, branched or cyclic alkylene residue, saturated or unsaturated. Preferably, R is a divalent hydrocarbon residue with Ci-Ce atoms, for example methylene, ethylene or propylene group.

In one or more embodiments, the at least one silyl-modified polymer may comprise one or more silyl-modified polyurethanes and/or silyl-modified polyurethane/polyether copolymers comprising at least one crosslinkable hydrolysable silyl group. In particular, the silyl-modified urethane polymer may for example be derived from the reaction of an aromatic polyisocyanate (such as for example toluene diisocyanate, diphenylmethane diisocyanate or xylylene diisocyanate or an aliphatic polyisocyanate) with a polyol.

In a preferred embodiment, the at least one silyl-modified polymer comprises at least one silyl-modified polyether. Typically, silyl-modified polyethers encompass a polyether main chain modified by at least one crosslinkable silyl group, more preferably by two terminal cross-linkable hydrolysable silyl groups. For example, the poly ether main chain may include repeating units selected from polyethylene oxide, polypropylene oxide, polybutylene oxide and/or polyphenylenoxide.

In particular, the at least one silyl-modified polymer can be derived from a polyether polymer backbone coupled with a trimethoxysilane or methyldimethoxysilane functional groups.

Preferably, the molecular weight (in particular a number average molecular weight) of the polyether main chain of the silyl modified polyether is in the range of 500 to 50,000 g/mol, preferably 1,000 to 30,000 g/mol, more preferably 3,000 to 15,000 g/mol.

The polymerization methods for preparing silyl-modified polymers are commonly known to those of skill in the art and for example described in US 3,971,751 and EP1288247.

In a particular embodiment, a formulation of the stabilized polymer composition includes the stabilizer composition in an amount of from 0.01 wt% to 10 wt%, preferably in an amount of from 0.1 wt% to 5 wt%, based on the total weight of the stabilized polymer composition, whereas the remainder of the stabilized polymer composition comprises the silyl-modified polymer to be stabilized. The specific components of the stabilizer composition as described herein can be present in the stabilized polymer composition in various amounts depending on the material to be stabilized and/or the level of desired protection. For example, the amount of the hindered phenol antioxidant compound in the stabilized polymer composition may be from about 0.01 wt.% to about 5 wt.%, preferably from about 0.05 wt.% to about 2 wt.%, more preferably from 0.1 wt.% to about 1 wt.%, based on the total weight of the stabilized polymer composition. For example, the amount of the hindered hydroxybenzoate compound in the stabilized polymer composition may be from about 0.01 wt.% to about 5 wt.%, preferably from about 0.05 wt.% to about 2 wt.%, more preferably from 0.1 wt.% to about 1 wt.%, based on the total weight of the stabilized polymer composition.

The amount of the optional hindered amine light stabilizer in the stabilized polymer composition for end-use can range from about 0 wt.% to about 5 wt.%, preferably 0.05 wt.% to about 2 wt.%, more preferably 0.1 wt.% to about 1 wt.% based on the total weight of stabilized polymer composition.

The amount of the optional UV absorber compound in the stabilized polymer composition is from about 0 wt.% to about 5 wt.%, preferably from about 0.05 wt.% to about 2 wt.%, more preferably from about 0.1 wt.% to about 1 wt.%, based on the total weight of the stabilized polymer composition.

The amount of the optional moisture scavenger in the stabilized polymer composition is from about 0 wt.% to about 9 wt.%, preferably from about 0.1 wt.% to about 7 wt.%, more preferably from 0.2 wt.% to about 5 wt.%, based on the total weight of the stabilized composition.

In certain embodiments, the stabilized polymer composition may further comprise at least one additive.

Suitable additives may be adhesion promoters, plasticizers, fillers, curing/condensation catalysts, liquid diluent, and other commonly known additives for silyl-modified polymer compositions.

Such typical additives for SMP sealants and adhesives are for example described in US 6,077,896, EP -A 1 288 247 and US 2003/105261.

The stabilized polymer composition may optionally further comprise at least one adhesion promoter.

Suitable adhesion promoters for use with the stabilizer composition according to embodiments include, but are not limited to, silane compounds having at least one additional functional group, e.g. selected from amino group, mercapto group, epoxy group, carboxyl group, vinyl group, isocyanate group, isocyanurate, halogen. Typically, the adhesion promoter is selected from epoxysilane, and aminosilane.

In embodiments where the stabilized polymer composition may comprise an optional adhesion promoter, the adhesion promoter may be present in an amount between about 0.1 wt.% to about 10 wt.%, preferably about 0.2 wt.% to about 5 wt. %, based on the total weight of the stabilized polymer composition.

The stabilized polymer composition may optionally further comprise at least one plasticizer.

Suitable plasticizers for use with the stabilizer composition according to embodiments include, but are not limited to, phthalate ester, such as dimethyl phthalate, diethyl phthalate, dibutyl phthalate, diheptyl phthalate, dioctyl phthalate, diisononyl phthalate, diisodecyl phthalate, di-isoundecyl phthalate, butylbenzyl phthalate, dilauryl phthalate and dicyclohexyl phthalate, epoxidized plasticizer, such as epoxidized Soybean oil, epoxidized linseed oil and benzyl epoxy stearate; fatty acid esters, such as alkyl and phenyl esters of C4-C2 fatty acids, polyester plasticizers derived from dibasic acids and dihydric alcohols, polyether, such as polypropylene glycol and derivatives thereof; polystyrenes, such as poly-C. -methyl styrene and polystyrene; polybutadiene, butadieneacrylonitrile copolymers, polychloroprene, polyisoprene, polybutene, chlorinated paraffins.

In embodiments where the stabilized polymer composition may comprise an optional plasticizer, the plasticizer may be present in an amount between about 1 wt.% to about 80 wt.%, preferably about 10 wt.% to about 60 wt. %, based on the total weight of the stabilized polymer composition The stabilized polymer composition may optionally further comprise at least one filler.

Suitable fillers for use with the stabilizer composition according to embodiments include, but are not limited to ground or precipitated calcium carbonate (PCC), kaolin, mica, clay, wollastonite, glass fiber, alumina (AI2O3) and combinations thereof

In embodiments where the stabilized polymer composition may comprise an optional filler, the filler may be present in an amount between about 1 wt.% to about 80 wt.%, preferably about 10 wt.% to about 60 wt. %, based on the total weight of the stabilized polymer composition.

The stabilized polymer composition may optionally further comprise at least one curing/condensation catalyst.

Suitable curing/condensation catalysts for use with the stabilizer composition according to embodiments include, but are not limited to silanol condensation catalyst. Such typical curing/condensation catalysts for SMP sealants and adhesives are for example described in US 6,077,896 and EP 1288247.

For example, such curing/condensation catalysts may be tetravalent tin compounds such as dibutyltin dilaurate, dibutyltin phthalate, dibutyltin bisacetylacetonate, dibutyltin diacetate, dibutyltin diethylhexanolate, dibutyltin dioctoate, dibutyltin di(methyl maleate), dibutyltin di(ethyl maleate), dibutyltin di(butyl maleate), dibutyltin di(isooctyl maleate), dibutyltin di(tridecyl maleate), dibutyltin di(benzyl maleate), dibutyltin maleate, dioctyltin diacetate, dioctyltin distearate, dioctyltin dilaurate, dioctyltin di(ethyl maleate), dioctyltin di(isooctyl maleate), dibutyltin dimethoxide, dibutyltin bisnonylphenoxide and dibutenyltin oxide; divalent tin compounds such as stannous octylate, stannous naphthenate and stannous stearate; titanate esters such as tetrabutyl titanate and tetrapropyl titanate; organoaluminum compounds such as aluminum trisacetylacetonate, aluminum tris(ethyl acetoacetate) and diisopropoxy aluminum ethyl acetoacetate; chelate compounds such as zirconium tetraacetylacetonate and titanium tetraacetyl acetoante; lead octylate; amine compounds such as butylamine, octylamine, laurylamine, dibutylamine, monoethanolamine, diethanolamine, triethanolamine, diethylenetriamine, triethylenetetramine, oleylamine, cyclohexylamine, benzylamine, diethylaminopropylamine, xylylenediamine, tnethylenediamine, guanidine, diphenylguanidine, 2,4,6-tris(dimethylaminomethyl)phenol, morpholine, N- methylmorpholine, 2-ethyl-4-methylimidazole and l,8-diazabicyclo[5.4.0]undecene-7 (DBU), or salts of these amine compounds with carboxylic acids; amine compound-organotin compound reaction products and mixtures, for example laurylaminestannous octylate reaction products or mixtures; low-molecular-weight polyamide resins obtainable from a polyamine in excess and a polybasic acid; reaction products from a polyamine in excess and an epoxy compound; amino group-containing silane coupling agents such as y- aminopropyltrimethoxy silane and N-((3-aminoethyl)aminopropylmethyl dimethoxy silane, and like silanol condensation catalysts and, further, other known silanol condensation catalysts such as acidic catalysts and basic catalysts.

In one or more embodiments, the curing/condensation catalyst may be one or a combination of two or more of those mentioned above. Preferably, the at least one curing/condensation catalyst is selected from metal organic compounds based on tetravalent titanium (such as di-isopropoxy titanium bis-acetylacetonat) and/or organic compounds based on tetravalent tin (such as di-alkyl tin bis acetylacetonate compounds, and di -alkyl tin phthalate esters), available for example from TIB Chemicals AG. More preferably, the curing/condensation catalyst comprises at least one organotin compound, more preferably dibutyltin bis-acetylacetonat and/or dioctyltin bis-acetylacetonat (e.g. TIB KAT 223, dioctyltindiketanoat).

In embodiments where the stabilized polymer composition may comprise an optional curing/condensation catalyst, the curing/condensation catalyst may be present in an amount between about 0.05 wt.% to about 5 wt.%, preferably about 0.1 wt.% to about 2 wt. %, based on the total weight of the stabilized polymer composition.

The stabilized polymer composition may optionally further comprise at least one liquid diluent, such as suitable solvents, liquid adjuvants or mixtures thereof.

In embodiments where the stabilized polymer composition may comprise an optional liquid diluent, the liquid diluent may be present in an amount between about 1 wt.% to about 80 wt.%, preferably about 10 wt.% to about 60 wt. %, based on the total weight of the stabilized polymer composition. The stabilizer compositions according to the disclosure can be readily combined with a silyl -modified polymer to be stabilized, or vice versa, by any suitable method known to those of skill in the art. As used herein the term “combined” or “combining” in reference to the stabilizer composition and the silyl-modified polymer to be stabilized includes all manners and/or techniques known to those skilled in the art for intermixing, admixing, integrating, mixing, or blending two or more substances. In one embodiment, combining can be performed by at least one of melting, dissolution in a solvent, direct mixing, and dry mixing.

The incorporation of the stabilizer compositions according to the disclosure, and of optional further additives, into the silyl-modified polymer to be stabilized can be carried out by known methods such as dry blending in the form of a powder, or wet mixing in the form of solutions, dispersions, or suspensions for example in an inert solvent, water, or oil. Such stabilizer compositions are preferably non-aqueous. The incorporation of the components of the stabilizer composition, and optional further additives, into the silyl- modified polymer to be stabilized can be carried out by any suitable method known to those of skill in the art and include, for example, before or after molding, or also by applying the dissolved or dispersed stabilizer mixture to the silyl-modified polymer to be stabilized, with or without subsequent evaporation of the solvent or suspension/dispersion agent. They may be added directly into processing apparatus (e.g., extruders, internal mixers, kneaders etc.) as a dry mixture or powder, or as a solution or dispersion, or suspension or melt.

Individual components of the stabilizer compositions according to the disclosure, and optional further additives, can also be combined into silyl-modified polymers at a time before, during, or just after, for example, polymerization of corresponding monomers, or before crosslinking. In this context, the stabilizer compositions according to the disclosure can also be combined into the silyl-modified polymer to be stabilized in pure form (i.e., neat and directly to the resin) or encapsulated in waxes, oils or polymers. Various additives can also be preblended (i.e., mixed together) for simple addition to a silyl-modified polymer to be stabilized. In certain embodiments, the amount of stabilizer composition, excluding the optional hindered amine light stabilizer, the optional UV absorber and the optional moisture scavenger, as described herein in the stabilized polymer composition for end-use is present at any point in the range from 0.01 wt. % to 5 wt. %„ preferably in the range from 0.05 wt. % to 2 wt. %, based on the total weight of the silyl-modified polymer to be stabilized.

Use of stabilizer compositions

In another aspect, embodiments herein relate to the use of the stabilizer compositions according to embodiments as described throughout the specification and claims, as stabilizer in sealants, adhesives and/or coatings based on silyl-modified polymers. In particular, the stabilizer compositions find a particularly advantageous application to improve heat stability and/or UV stability of sealants, adhesives and/or coatings based on silyl-modified polymers.

In another aspect, embodiments herein relate to a stabilizer composition for application in silyl-modified polymer based adhesives, sealants and/or coatings comprising: at least one hindered phenol antioxidant; at least one hindered hydroxybenzoate and at least one moisture scavenger, preferably propyltrimethoxysilane.

In one or more embodiments, the stabilizer composition further comprises at least one hindered amine light stabilizer.

In one or more embodiments, the stabilizer composition further comprises at least one UV absorber.

Preferably, the at least one hindered phenol antioxidant, the at least one hindered hydroxybenzoate, the at least one moisture scavenger and the optionally at least one hindered amine light stabilizer, the optionally at least one UV absorber present in the said stabilizer composition are those described above throughout the specification and claims.

In another aspect, embodiments herein relate to the method of improving thermal stability of silyl-modified polymer based adhesives, sealants and/or coatings comprising incorporation of at least one hindered hydroxybenzoate and at least one hindered phenol antioxidant, as described throughout the specification and claims, into a curable silyl- modified polymer composition to be stabilized. In particular, the thermal stability improvement is measured by increase in time of the cured polymer to crack at elevated temperatures (above 80 °C) when compared to in the absence of a hindered hy droxyb enzoate .

Indeed, according to the present disclosure, the hindered hydroxybenzoate compounds when used in combination with hindered phenol antioxidants as described throughout the specification provide synergistic thermal stability enhancement of the silyl- modified polymers based formulations, for applications such as sealants, coatings and adhesives.

Those of skill in the art will appreciate that the stabilized polymer compositions disclosed herein may be used in a variety of applications, including, but not limited to sealants, coatings and adhesives. For example, the stabilized polymer compositions can also be used as paint, adhesive, poured filler, coating material or the like.

Examples

The following examples are provided to assist one skilled in the art to further understand certain embodiments of the present disclosure. These examples are intended for illustration purposes and are not to be construed as limiting the scope of the various embodiments of the present disclosure.

The Chemical names, commercial names and supplier information for the stabilizer additives used in the study were listed in Table 1.

Table 1. Chemical names, commercial names and supplier information for the stabilization additives used in the examples

Example 1- Preparation of formulations In a typical experiment, stabilizer additives were first dissolved/dispersed in a liquid carrier, such as PTMO (propyltrimethoxy silane) or VTMO (vinyltrimethoxy silane). Then the liquid solution/dispersion of stabilizer additives was mixed with standard package including silyl-modified polymers (such as SAX520 MS polymer and SAX750 MS polymer from Kaneka), fillers, plasticizers, catalysts, adhesion promoters (such as AMMO (Evonik, 3-Aminopropyltrimethoxysilane)), and moisture scavengers in a plastic cup with a SpeedMixer® from Hauschild to obtain a homogenized liquid mixture. The components and loadings for each formulation are listed in Tables 2 (white formulations, i.e. not transparent) and Table 3 (clear formulations, i.e. transparent).

Next, the liquid mixture was poured onto a polyethylene film on a flat surface and left to cure at ambient atmosphere and room temperature for a week. Then the cured sample was peeled off from the polyethylene film for thermal aging and weathering study. Table 2: Standard formulation (white).

Table 3: Standard formulation (clear). Example 2- Thermal performance at 115°C

For thermal stability study, the cured sample of each formulation in Table 2 and Table 3 were kept in a 115° C oven. The number of days for samples to crack were recorded in Table 4 and Table 5. Sample IB performed similarly to Sample 1 A and Sample 2B performed similarly to Sample 2A, indicating that CYASORB® UV-2908, a hydroxybenzoate compound, showed no improvement over the control in the thermal stability of SMP based formulation. However, the unexpected good results of Sample ID (compared with Sample 1C), Sample IF (compared with Sample IE), Sample 2D (compared with Sample 2C), and Sample 2F (compared with Sample 2E), demonstrate a strong synergy between hydroxybenzoate CYASORB® UV-2908 and hindered phenol antioxidant CYANOX® 1790 in the thermal performance of both white and clear SMP based formulations. Thus, the thermal performance when the hindered phenol antioxidant CYANOX® 1790 is used in the absence of a hydroxybenzoate is greatly improved with the addition of hydroxybenzoate CYASORB® UV-2908, whereas the hydroxybenzoate CYASORB® UV-2908 by itself does not show any thermal performance advantage.

Table 4: Thermal performance of white formulations.

Table 5: Thermal performance of clear formulations.

Example 3- Accelerated UV weathering study.

For UV weathering, samples were placed in a QUV Accelerated Weathering Tester with UVA-340 bulbs under ASTM G154 testing conditions. The time for samples to crack were recorded in Table 6 and Table 7. The hydroxybenzoate CYASORB® UV-2908 comprising SMP based formulated samples #1D, #1F, #2D, and #2F showed that the UV performance is maintained while the thermal performance is improved as shown above.

Table 6: Accelerated UV weathering of white formulations. Table 7 : Accelerated UV weathering of clear formulations.

Although only a few example embodiments have been described in detail above, those skilled in the art will readily appreciate that many modifications are possible in the example embodiments without materially departing from this invention. Accordingly, all such modifications are intended to be included within the scope of this disclosure as defined in the following claims.

Claims

1. A stabilized polymer composition comprising: a. at least one silyl-modified polymer to be stabilized, and b. a stabilizer composition comprising: at least one hindered phenol antioxidant; and at least one hindered hydroxybenzoate.

2. The stabilized polymer composition according to claim 1, wherein the stabilizer composition further comprises at least one hindered amine light stabilizer.

3. The stabilized polymer composition according to claims 1 or 2, wherein the stabilizer composition further comprises at least one UV absorber.

4. The stabilized polymer composition according to any one of claims 1 to 3, wherein the stabilizer composition further comprises at least one moisture scavenger.

5. The stabilized polymer composition according to any one of claims 1 to 4, wherein the ratio of the at least one hindered hydroxybenzoate compound to the at least one hindered phenol antioxidant compound is in the range from 10: 1 to 1 : 10, preferably in the range from 5: 1 to 1 :5, more preferably from 3:1 to 1 :3.

6. The stabilized polymer composition according to any one of claims 1 to 5, wherein the at least one hindered phenol antioxidant compound comprises a molecular fragment according to one or more of Formula (IVa), (IVb), or (IVc):

Formula (IVa) Formula (IVb) Formula (IVc) wherein

R19 and R20 in Formulae (IVa), (IVb) and (IVc) are each individually chosen from hydrogen and a C1-C20 hydrocarbyl; and

R37 in Formulae (IVa), (IVb) and (IVc) is chosen from C1-C12 hydrocarbyl.

7. The stabilized polymer composition according to claim 6, wherein at least one Ris, R37 and R20 does not have an alkylgroup with thioether functionality.

8. The stabilized polymer composition according to claims 6 or 7, wherein Ris and R37 in Formulae (IVa), (IVb) and (IVc) are chosen from methyl and t-butyl.

9. The stabilized polymer composition according to any one of claims 1 to 8, wherein the at least one hindered phenol antioxidant is chosen from: l,3,5-tris(4-t-butyl-3- hydroxy-2,6-dimethylbenzyl)-l,3,5-triazine-2,4,6-(lH,3H,5H)-trione; 1 ,3,5-tris(3,5-di- tert-butyl-4-hydroxybenzyl)-l,3,5-triazine-2,4,6(lH,3H,5H)-trione; 1, 1 ,3-tris(2’ - methyl-4’-hydroxy-5’-t-butylphenyl)butane; triethylene glycol bis[3-(3-t-butyl-4- hydroxy-5-methylphenyl)propi onate]; 4,4’-thiobis(2-t-butyl-5-methylphenol); 2,2’ - thiodi ethylene bis[3-(3-t-butyl-4-hydroxyl-5-methylphenyl)propionate]; octadecyl 3-(3’- /-butyl-4’ -hydroxy-5 ’-methylphenyl)propionate; tetrakismethylene(3-/-butyl-4- hydroxy-5-methylhydrocinnamate)methane; N,N ’-hexamethylene bis[3-(3-t-butyl-4- hydroxy-5-methylphenyl)propionamide]; di(4-tertiarybutyl-3-hydroxy-2,6-dimethyl benzyl) thiodipropionate; pentaerythritol tetrakis(3-(3,5-di-tert-butyl-4- hydroxyphenyl)propionate); l,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4- hydroxybenzyl)benzene; bis-(3,3-bis-(4'-hydroxy-3'-tert butylphenyl) butanoic acid)- glycol ester; and octadecyl 3,5-di-(tert)-butyl-4-hydroxyhydrocinnamate; and mixtures thereof.

10. The stabilized polymer composition according to any one of claims 1 to 9, wherein the at least one hindered hydroxybenzoate is a compound according to Formula (III):

11. The stabilized polymer composition according to any one of claims 1 to 10, wherein the at least one hindered hydroxybenzoate compound is selected from the group consisting of 2,4-di-tert-butylphenyl 3,5-di-tert-butyl-4-hydroxybenzoate; hexadecyl 3,5-di-tert-butyl-4-hydroxybenzoate; octadecyl 3,5-di-tert-butyl-4-hydroxybenzoate; octyl 3,5-di-tert-butyl-4-hydroxybenzoate; decyl 3,5-di-tert-butyl-4-hydroxybenzoate; dodecyl 3,5-di-tert-butyl-4-hydroxybenzoate, tetradecyl 3,5-di-tert-butyl-4- hydroxybenzoate; behenyl 3,5-di-tert-butyl-4-hydroxybenzoate; 2-methyl-4,6-di-tert- butylphenyl 3,5-di-tert-butyl-4-hydroxybenzoate and butyl 3-[3-t-butyl-4-(3,5-di-t- butyl-4-hydroxybenzoyloxy)phenyl]propionate; and mixtures thereof.

12. The stabilized polymer composition according to any one of claims 1 to 11, wherein the at least one hindered amine light stabilizer (HALS) compound comprises a molecular fragment according to Formula (II): Formula (II) wherein R31 in Formula (II) is chosen from: hydrogen; OH; C1-C20 hydrocarbyl; -CH2CN; C1-C12 acyl; and Ci-Cis alkoxy; R38 in Formula (II) is chosen from: hydrogen; and Ci-Cs hydrocarbyl; and each of R29, R30, R32, and R33 in Formula (II) is independently chosen from C1-C20 hydrocarbyl, or R29 and R30 and/or R32 and R33 in Formula (II) taken together with the carbon to which they are attached form a C5-C10 cycloalkyl; or Formula (Ila) wherein m in Formula (Ila) is an integer from 1 to 2; R39 is chosen from: hydrogen; OH; C1-C20 hydrocarbyl; -CH2CN; C1-C12 acyl; and Ci-Cis alkoxy; and each of G1-G4 in Formula (Ila) is independently chosen from C1-C20 hydrocarbyl.

13. The stabilized polymer composition according to any one of claims 1 to 12, wherein the at least one hindered amine light stabilizer is selected from the group consisting of bis(2,2,6,6-tetramethylpiperidin-4-yl) sebacate; bis(2, 2,6,6- tetramethylpiperidin-4-yl)succinate; bis(l,2,2,6,6-pentamethylpiperidin-4-yl)sebacate; bis(l-octyloxy-2,2,6,6-tetramethylpiperidin-4-yl)sebacate; bis(l,2,2,6,6- pentamethylpiperidin-4-yl) n-butyl 3,5-di-tert-butyl-4-hydroxybenzylmalonate; a condensate of l-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-hydroxypiperidine and succinic acid; 2,2,6,6-tetramethylpiperidin-4-yl stearate; 2,2,6,6-tetramethylpiperidin-4-yl dodecanate; l,2,2,6,6-pentamethylpiperidin-4-yl stearate; 1, 2, 2,6,6- pentamethylpiperidin-4-yl dodecanate; a condensate of N, N'-bis(2, 2,6,6- tetramethylpiperidin-4-yl)hexamethylenediamine and 4-tert-octylamino-2,6-dichloro-

1.3.5-triazine; tris(2,2,6,6-tetramethylpiperidin-4-yl) nitrilotriacetate; tetrakis(2, 2,6,6- tetramethylpiperidin-4-yl)- 1,2,3,4-butanetetracarboxylate; 4-benzoyl-2, 2,6,6- tetramethylpiperidine; 4-stearyloxy-2,2,6,6-tetramethylpiperidine; bis(l,2,2,6,6- pentamethylpiperidyl)-2-n-butyl-2-(2 -hydroxy-3, 5-di-tert-butylbenzyl)malonate; 3-n- octyl-7,7,9,9-tetramethyl-l,3,8-triazaspiro[4.5]decan-2,4-dione; bis(l-octyloxy-2, 2,6,6- tetramethylpiperidyl)sebacate; bis(l-octyloxy-2,2,6,6-tetramethylpiperidyl)succinate; a condensate of N,N'-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexamethylenediamine and 4- morpholino-2,6-dichloro-l,3,5-triazine; a condensate of N, N'-bis(2, 2,6,6- tetramethylpiperidin-4-yl)hexamethylenediamine and 4-morpholino-2,6-di chi oro-1, 3,5- triazine, methylated; a condensate of 2-chloro-4,6-bis(4-n-butylamino-2, 2,6,6- tetramethylpiperidyl)-l,3,5-triazine and l,2-bis(3-aminopropylamino)ethane; a condensate of 2-chloro-4, 6-bis(4-n-butylamino-l, 2,2,6, 6-pentamethylpiperidyl)-l, 3,5- triazine and l,2-bis-(3-aminopropylamino)ethane; N2,N2'-(Ethane-l,2-diyl)bis(N2-(3- ((4,6-bis(butyl(l,2,2,6,6-pentamethylpiperidin-4-yl)amino)-l,3,5-triazin-2- yl)amino)propyl)-N4,N6-dibutyl-N4,N6-bis(l, 2,2,6, 6-pentamethylpiperidin-4-yl)-l, 3,5- triazine-2,4,6-triamine); a condensate of N,N'-bis(2,2,6,6-tetramethylpiperidin-4- yl)hexamethylenediamine, N-butyl-2,2,6,6-tetramethyl-4-piperidinamine, di-n-butyl amine, and 2,4,6-trichloro-l,3,5-triazine; 8-acetyl-3-dodecyl-7,7,9,9-tetramethyl-l,3,8- triazaspiro[4.5]decane-2, 4-dione; 3-dodecyl-l-(2,2,6,6-tetramethylpiperidin-4- yl)pyrrolidin-2, 5-dione; 3-dodecyl-l-(l-ethanoyl-2,2,6,6-tetramethylpiperidin-4- yl)pyrrolidin-2, 5-dione; 3-dodecyl-l-(l, 2,2,6, 6-pentamethylpiperidin-4-yl)pyrrolidine-

2.5-dione; a mixture of 4-hexadecyloxy- and 4-stearyloxy-2,2,6,6-tetramethylpiperidine; a condensate of N,N'-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexamethylenediamine and 4-cyclohexylamino-2,6-dichloro-l,3,5-triazine; a condensate of l,2-bis(3- aminopropylamino)ethane, 2,4,6-trichloro-l,3,5-triazine and 4-butylamino-2, 2,6,6- tetramethylpiperidine; 2-undecyl-7,7,9,9-tetramethyl-l-oxa-3,8-diaza-4- oxospiro[4.5]decane; oxo-piperanzinyl -triazines; a reaction product of 7, 7, 9, 9- tetramethyl-2-cycloundecyl-l-oxa-3,8-diaza-4-oxospiro[4.5]decane and epichlorohydrin; tetrakis(2,2,6,6-tetramethyl-4-piperidyl)butane-l,2,3,4- tetracarboxylate; 1,2,3,4-butanetetracarboxylic acid, tetrakis(l, 2,2,6, 6-pentamethyl-4- piperidinyl) ester; 1,2,3,4-butanetetracarboxylic acid, l,2,2,6,6-pentamethyl-4- piperidinyl tridecyl ester; 1,2,3,4-butanetetracarboxylic acid, 2,2,6,6-tetramethyl-4- piperidinyl tridecyl ester; 1,2,3,4-butanetetracarboxylic acid, polymer with 2, 2,6,6- tetramethyl-2,4,8,10-tetraoxaspiro[5.5]-undecane-3,9-diethanol,l,2,2,6,6-pentamethyl- 4-piperdinyl ester; 1,2,3,4-butanetetracarboxylic acid, polymer with 2,2,6,6-tetramethyl- 2,4,8, 10-tetraoxaspiro[5.5]-undecane-3,9-diethanol, 2,2,6,6-tetramethyl-4-piperdinyl ester; bis(l-undecanoxy-2,2,6,6-tetramethylpiperidin-4-yl)carbonate; l-(2-hydroxy-2- methylpropoxy)-2,2,6,6-tetramethyl-4-piperdinol; l-(2-hydroxy-2-methylpropoxy)-4- octadecanoyloxy-2,2,6,6-tetramethylpiperidine; l-(4-octadecanoyloxy-2,2,6,6- tetramethylpiperidin-l-yloxy)-2-octadecanoyloxy-2-methylpropane; l-(2- hydroxyethyl)-2,2,6,6-tetramethyl-4-piperdinol; a reaction product of l-(2- hydroxyethyl)-2,2,6,6-tetramethyl-4-piperdinol and dimethyl succinate; 2, 2, 4, 4- tetramethyl-7-oxa-3,20-diazadispiro[5.1.11.2]heneicosan-21-one; the ester of 2, 2,6,6- tetramethyl-4-piperidinol with higher fatty acids; 3-dodecyl-l-(2,2,6,6-tetramethyl-4- piperidyl)pyrrolidine-2, 5-dione; lH-Pyrrole-2, 5-dione, 1-octadecyl-, polymer with (1- methylethenyl)benzene and l-(2,2,6,6-tetramethyl-4-piperidinyl)-lH-pyrrole-2,5-dione; piperazinone, l,l\l"-[l,3,5-triazine-2,4,6-triyltris[(cyclohexylimino)-2,l- ethanediyl]]tris[3,3,5,5-tetramethyl-; piperazinone, l,l',l"-[l,3,5-triazine-2,4,6- triyltris[(cyclohexylimino)-2,l-ethanediyl]]tris[3,3,4,5,5-pentamethyl-; ; 2-[(2- hydroxyethyl)amino]-4,6-bis[N-(l -cyclohexyloxy -2, 2, 6, 6-tetramethylpiperi din-4- yl)butylamino-l,3,5-triazine; propanedioic acid, [(4-methoxyphenyl)-methylene]-bis- (l,2,2,6,6-pentamethyl-4-piperidinyl) ester; tetrakis(2,2,6,6-tetramethylpiperidin-4-yl)- 1,2,3,4-butanetetracarboxylate; benzenepropanoic acid, 3,5-bis(l,l-dimethylethyl)-4- hydroxy-, l-[2-[3-[3,5-bis(l,l-dimethylethyl)-4-hydroxyphenyl]-l-oxopropoxy]ethyl]- 2,2,6,6-tetramethyl-4-piperidinyl ester; N-(l-octyloxy-2, 2, 6, 6-tetramethylpiperi din-4- yl)-N'-dodecyloxalamide; l,5-dioxaspiro{5,5}undecane-3,3-dicarboxylic acid, bis(l,2,2,6,6-pentamethyl-4-piperidinyl): l,5-dioxaspiro{5,5}undecane-3,3-dicarboxylic acid, bis(2,2,6,6-tetramethyl-4-piperidinyl); 1 tetrakis(l, 2,2,6, 6-pentamethylpiperidin-4- yl)-l,2,3,4-butanetetracarboxylate; mixture of 2,2,4,4-tetramethyl-21-oxo-7-oxa-3.20- diazaspiro(5.1.11.2)-heneicosane-20-propanoic acid-dodecylester and 2, 2,4,4- tetramethyl-21 -oxo-7-oxa-3 ,20-diazaspiro(5.1.11 ,2)-heneicosane-20-propanoic acid- tetradecyl ester; lH,4H,5H,8H-2,3a,4a,6,7a,8a-hexaazacyclopenta[def]fluorene-4,8- dione, hexahydro-2, 6-bis(2, 2, 6, 6-tetramethyl-4-piperidinyl)-; polymethyl[propyl-3- oxy(2',2',6',6'-tetramethyl-4,4'-piperidinyl)]siloxane; polymethyl [propyl-3- oxy(r,2',2',6',6'-pentamethyl-4,4'-piperidinyl)]siloxane; copolymer of methylmethacrylate with ethyl acrylate and 2,2,6,6-tetramethylpiperidin-4-yl acrylate; copolymer of mixed C20 to C24 alpha-olefins and (2,2,6,6-tetramethylpiperidin-4- yl)succinimide; 1,2,3,4-butanetetracarboxylic acid, polymer with P,P,P',P'-tetramethyl- 2,4,8, 10-tetraoxaspiro[5.5]undecane-3,9-diethanol, l,2,2,6,6-pentamethyl-4-piperidinyl ester; 1,2,3,4-butanetetracarboxylic acid, polymer with P,P,P',P'-tetramethyl-2,4,8,10- tetraoxaspiro[5.5]undecane-3,9-diethanol, 2,2,6,6-tetramethyl-4-piperidinyl ester copolymer; 1,3 -benzenedi carb oxami de, N,N'-bis(2,2,6,6-tetramethyl-4-piperidinyl; 1,1'- (1,10-dioxo- 1 , 10-decanediyl)-bis(hexahy dro-2, 2, 4, 4, 6-pentam ethylpyrimidine; ethane diamide, N-(l-acetyl-2,2,6,6-tetramethylpiperidinyl)-N'-dodecyl; formamide, N,N'-1,6- hexanediylbis[N-(2,2,6,6-tetramethyl-4-piperidinyl); D-glucitol, 1,3 :2,4-bis-O-(2, 2,6,6- tetramethyl-4-piperidinylidene)-; 2,2,4,4-tetramethyl-7-oxa-3,20-diaza-21-oxo- dispiro[5.1.11 ,2]heneicosane; propanamide, 2-methyl-N-(2,2,6,6-tetramethyl-4- piperidinyl)-2-[(2,2,6,6-tetramethyl-4-piperidinyl)amino]-; 7-oxa-3,20- diazadispiro[5.1.11 ,2]heneicosane-20-propanoic acid, 2,2,4,4-tetramethyl-21-oxo-, dodecyl ester; N-(2,2,6,6-tetramethylpiperidin-4-yl)-P-aminopropionic acid dodecyl ester; N-(2,2,6,6-tetramethylpiperidin-4-yl)-N'-aminooxalamide; propanamide, N- (2,2,6,6-tetramethyl-4-piperidinyl)-3-[(2,2,6,6-tetramethyl-4-piperidinyl)amino]-;; 3- dodecyl-l-(l-ethanoyl-2,2,6,6-pentamethylpiperidin-4-yl)pyrrolidine-2, 5-dione; 1,1'- (l,2-ethanediyl)bis(3,3,5,5-tetramethylpiperazinone); ; N¹-(p-hydroxyethyl)3,3- pentamethylene-5,5-dimethylpiperazin-2-one; N'-tert-octyl-3,3,5,5-tetramethyl- diazepin-2-one; N'-tert-octyl-3,3-pentamethylene-5,5-hexamethylene-diazepin-2-one; N¹-tert-octyl-3,3-pentamethylene-5,5-dimethylpiperazin-2-one; trans- 1,2-cy cl ohexane- bis-(N¹-5,5-dimethyl-3,3-pentamethylene-2-piperazinone; trans- 1,2-cy cl ohexane-bis- (N¹ -3 ,3 , 5 , 5 -di spiropentamethylene-2-piperazinone); N¹ -i sopropyl- 1 ,4-di azadi spiro-

(3,3,5,5)pentamethylene-2-piperazinone; N sopropyl-l^-diazadispiro-S^- pentamethylene-5 , 5 -tetramethylene-2-piperazinone; N¹ -i sopropyl-5 , 5 -dimethyl -3,3- pentamethylene-2-piperazinone; trans-l,2-cyclohexane-bis-N¹-(dimethyl-3,3- pentamethylene-2-piperazinone); N^octyl-S^-dimethyl-S^-pentamethylene-l^- diazepin-2-one; N¹-octyl-l,4-diazadispiro-(3,3,5,5)pentamethylene-l,5-diazepin-2-one; and mixtures thereof.

14. The stabilized polymer composition according to any one of claims 1 to 13, wherein the at least one hindered amine light stabilizer is selected from the group consisting of a condensate of N,N'-bis(2,2,6,6-tetramethylpiperidin-4- yl)hexamethylenediamine and 4-morpholino-2,6-dichloro-l,3,5- triazine; a condensate of N,N'-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexamethylenediamine and 4-morpholino- 2,6-dichloro-l,3,5-triazine, methylated; N2,N2'-(Ethane-l,2-diyl)bis(N2-(3-((4,6- bis(butyl(l,2,2,6,6-pentamethylpiperidin-4-yl)amino)-l,3,5-triazin-2-yl)amino)propyl)- N4,N6-dibutyl-N4,N6-bis(l, 2,2,6, 6-pentamethylpiperidin-4-yl)- 1,3, 5-triazine-2, 4,6- triamine); a condensate of N,N'-bis(2,2,6,6-tetramethylpiperidin-4- yl)hexamethylenediamine, N-butyl-2,2,6,6-tetramethyl-4-piperidinamine, di-n-butyl amine, and 2,4,6-trichloro-l,3,5-triazine; and mixtures thereof.

15. The stabilized polymer composition according to any one of claims 1 to 14, wherein the at least one UV absorber is selected from the group consisting of orthohydroxy tris-aryl-s-triazine compounds; 2-(2’-hydroxyphenyl) benzotriazole compounds; 2-hydroxybenzophenone compounds; benzoxazinone compounds; and an oxanilide, and mixtures thereof.

16. The stabilized polymer composition according to claim 15, wherein the orthohydroxy tris-aryl-s-triazine compound is a 2-(2’-hydroxyphenyl)- 1,3, 5 -triazine compound according to Formula (I):

Formula (I) wherein R34 and R35 are the same or different and are independently chosen from: a Ce-Cio aryl group, wherein the Ce-Cio aryl group is optionally substituted at from 1 to 3 substitutable positions with one or more group chosen from OH, halogen, C1-C12 alkyl, C1-C12 alkoxy, C1-12 alkoxyester, C2-12 alkanoyl, or phenyl, wherein the phenyl is optionally substituted at from 1 to 3 substitutable positions with one or more group chosen from: hydroxyl, halogen, C1-12 alkyl, C1-12 alkoxy, C1-12 alkoxyester, or C2-12 alkanoyl; mono- or di-Cl-C12 hydrocarbyl-substituted amino;

C2-C12 alkanoyl;

C1-C12 alkyl;

Ci-Cio acyl; or

C1-C10 alkoxyl; and

17. The stabilized polymer composition according to claim 16, wherein the 2-(2’- hydroxyphenyl)-l,3,5-triazine compound is chosen from: 4,6-bis-(2,4-dimethylphenyl)- 2-(2-hydroxy-4-octyloxyphenyl)-s-triazine; 4,6-bis-(2,4-dimethylphenyl)-2-(2-hydroxy- 4-isooctyloxyphenyl)-s-triazine; 4,6-bis-(2,4-dimethylphenyl)-2-(2,4-dihydroxyphenyl)- s-triazine; 2,4-bis(2,4-dihydroxyphenyl)-6-(4-chlorophenyl)-s-triazine; 2,4-bis[2- hydroxy-4-(2-hydroxy-ethoxy)phenyl]-6-(4-chlorophenyl)-s-triazine; 2,4-bis[2- hydroxy-4-(2-hydroxy-4-(2-hydroxy-ethoxy)phenyl]-6-(2,4-dimethylphenyl)-s-tri azine; 2,4-bis[2-hydroxy-4-(2-hydroxyethoxy)phenyl]-6-(4-bromophenyl)-s-triazine; 2,4- bis[2 -hydroxy -4-(2-acetoxyethoxy)phenyl]-6-(4-chlorophenyl)-s-triazine; 2,4-bis(2,4- dihydroxyphenyl)-6-(2,4-dimethylphenyl)-s-triazine; 2,4-bis(4-biphenylyl)-6-[2- hydroxy-4-[(octyloxycarbonyl)ethylideneoxy]phenyl]-s-triazine; 2,4-bis(4-biphenylyl)- 6-[2-hydroxy-4-(2-ethylhexyloxy)phenyl]-s-triazine; 2-phenyl-4-[2-hydroxy-4-(3-sec- butyloxy-2-hydroxypropyloxy)phenyl]-6-[2-hydroxy-4-(3-sec-amyloxy-2- hydroxypropyloxy)phenyl]-s-triazine; 2,4-bis(2,4-dimethylphenyl)-6-[2-hydroxy-4(-3- benzyloxy-2-hydroxypropyloxy)phenyl]-s-triazine; 2,4-bis(2-hydroxy-4-n- butyloxyphenyl)-6-(2,4-di-n-butyloxyphenyl)-s-triazine; 2,4-bis(2,4-dimethylphenyl)-6- [2-hydroxy-4-(3-nonyloxy-2-hydroxypropyloxy)-5-a-cumylphenyl]-s-tri azine; methylenebis-{2,4-bis(2,4-dimethylphenyl)-6-[2-hydroxy-4-(3-butyloxy-2- hydroxypropoxy)phenyl]-s-triazine; methylene bridged dimer mixture bridged in the 3:5', 5:5' and 3:3' positions in a 5:4:1 ratio; 2,4,6-tris(2-hydroxy-4-isooctyloxycarbonyliso- propylideneoxy-phenyl)-s-triazine; 2,4-bis(2,4-dimethylphenyl)-6-(2-hydroxy-4- hexyloxy-5-a-cumylphenyl)-s-triazine; 2-(2,4,6-trimethylphenyl)-4,6-bis[2-hydroxy-4- (3-butyloxy-2-hydroxypropyloxy)phenyl]-s-triazine; 2,4,6-tris[2-hydroxy-4-(3-sec- butyloxy-2-hydroxypropyloxy)-phenyl]-s-triazine; mixture of 4,6-bis-(2,4- dimethylphenyl)-2-(2-hydroxy-4-(3-dodecyloxy-2-hydroxypropoxy)phenyl)-s-tri azine and 4,6-bis-(2,4-dimethylphenyl)-2-(2-hydroxy-4-(3-tridecyloxy-2- hydroxypropoxy)phenyl)-s-triazine; 4,6-bis-(2,4-dimethylphenyl)-2-(2-hydroxy-4(3-(2- ethylhexyloxy)-2-hydroxypropoxy)-phenyl)-s-triazine; 4,6-diphenyl-2-(4-hexyloxy-2- hydroxyphenyl)-s-triazine; 2-(4,6-diphenyl-l,3,5-triazin-2-yl)-5-[2-(2- ethylhexanoyloxy)ethoxy]phenol; 2,4,6-tris(2-hydroxy-4-octyloxyphenyl)-l,3,5- triazine; propanoic acid, 2,2’,2”-[l,3,5-triazine-2,4,6-triyltris[(3-hydroxy-4, 1- phenylene)oxy]]tris-l,r,l” -trioctyl ester; propanoic acid, 2-[4-[4,6-bis([ 1 , 1 ’ -biphenyl]- 4-yl)-l,3,5-triazin-2yl]-3-hydroxyphenoxyl]-isooctyl ester; and combinations thereof.

18. The stabilized polymer composition according to claim 15, wherein the 2-(2'- hydroxyphenyl)benzotriazole is selected from 2-(2'-hydroxy-5'- methylphenyl)benzotriazole, 2-(2'-hydroxy-5'-/c/7-biitylphenyl)benzotri azole, 2-(2'- hydroxy-3'-methyl-5'-/c 7-biitylphenyl)benzotri azole, 2-(2'-hydroxy-5'- cyclohexylphenyl)benzotriazole, 2-(2'-hydroxy-3',5'-dimethylphenyl)benzotriazole, 2- (2'-hydroxy-5'-/c 7-biitylphenyl)-5-chloro-benzotri azole, 2-(2'-hydroxy-5'-/c 7- octylphenyl)benzotriazole, 2-(3',5'-di-te/7-butyl-2'-hydroxyphenyl)-5- chlorobenzotriazole, 2-(3',5'-di-tert-amyl-2'-hydroxyphenyl)benzotri azole, 2-(3',5'- bis(a,a-dimethylbenzyl)-2'-hydroxyphenyl)benzotriazole, 2-(3'-tert-butyl-2'-hydroxy-5'- (2-octyloxycarbonylethyl)phenyl)benzotriazole, 2,2'-methylenebis[4-(l,l,3,3- tetramethylbutyl)-6-benzotriazole-2-ylphenol], the transesterification product of 2-[3'- te/7-butyl-5'-(2-methoxycarbonylethyl)-2'-hydroxyphenyl]-2H-benzotri azole with polyethylene glycol 300, 2-[2'-hydroxy-3'-(a,a-dimethylbenzyl)-5'-(l, 1,3,3- tetramethylbutyl)phenyl]benzotriazole, 5-trifluoromethyl-2-(2-hydroxy-3-a-cumyl-5- /<77-octyl phenyl benzotri azole, 2-(2'-hydroxy-5'-(2-hydroxyethyl)phenyl)benzotriazole, 2-(2'-hydroxy-5'-(2-methacryloyloxyethyl)phenyl)benzotriazole, 2-(2'-hydroxy-3'-tert- butyl-5'-methylphenyl)-5-chlorobenzotriazole, 2-(3'-sec-butyl-5'-tert-butyl-2'- hydroxyphenyl)benzotriazole, 2-(3',5'-di-te/7-butyl-2'-hydroxyphenyl)benzotri azole, 2- (3'-dodecyl-5'-methyl-2'-hydroxyphenyl)benzotriazole, 2-(3'-tert-butyl-5'-(2- octyloxycarbonylethyl)-2'-hydroxyphenyl)-5-chlorobenzotriazole, 2-(5'-methyl-2'- hydroxyphenyl)benzotriazole, or 2 (5'-tert-butyl-2'-hydroxyphenyl)benzotriazole; and combinations thereof.

19. The stabilized polymer composition according to claim 15, wherein the benzoxazinone may be selected from 2-methyl-3,l-benzoxazin-4-one, 2 butyl-3,1- benzoxazin-4-one, 2-phenyl-3,l-benzoxazin-4-one, 2-(l- or 2-naphthyl)-3,l- benzoxazin-4-one, 2-(4-biphenyl)-3,l-benzoxazin-4-one, 2 p nitrophenyl-3,1- benzoxazin-4-one, 2 m nitrophenyl-3,l-benzoxazin-4-one, 2 p benzoylphenyl-3,1- benzoxazin-4-one, 2 p methoxyphenyl-3,l-benzoxazin-4-one, 2 O methoxyphenyl-3,1- benzoxazin-4-one, 2 cyclohexyl-3,l-benzoxazin-4-one, 2-p-(or m-)phthalimidephenyl- 3, l-benzoxazin-4-one, N-phenyl-4-(3, l-benzoxazin-4-one-2-yl)phthalimide, N-benzoyl- 4-(3,l-benzoxazine-4-one-2-yl)aniline, N-benzoyl-N-methyl-4-(3,l-benzoxazin-4-one- 2-yl)-aniline, 2-[p-(N-phenylcarbamonyl)phenyl]-3,l-benzoxazin-4-one, 2 [p-(N-phenyl N-methylcarbamoyl)phenyl]-3,l-benzoxazin-4-one, 2,2' bis(3,l-benzoxazin-4-one), 2,2' ethylenebis(3,l-benzoxazin-4-one), 2,2' tetramethylenebis(3,l-benzoxazin-4-one), 2,2' hexamethylenebis(3,l-benzoxazin-4-one), 2,2'-decamethylenebis(3,l-benzoxazin-4- one), 2,2'-p-phenylenebis(3,l-benzoxazin-4-one), 2,2' m phenylenebis(3,l-benzoxazin- 4-one), 2,2' (4,4'-diphenylene)bis(3,l-benzoxazin-4-one), 2,2' (2,6-or 1,5- naphthalene)bis(3,l-benzoxazin-4-one), 2,2'-(2-methyl-p-phenylene)bis(3,l- benzoxazin-4-one), 2,2'-(2-nitro-p-phenylene)bis(3,l-benzoxazin-4-one), 2,2'-(2-chloro- p-phenylene)bis(3,l-benzoxazin-4-one), 2,2' (1,4 cyclohexylene)bis(3,l-benzoxazin-4- one), N-p-(3,l-benzoxazin-4-on-2-yl)phenyl, 4 (3,1 benzoxazin-4-on-2-yl)phthalimide, N-p-(3,l-benzoxazin-4-on-2-yl)benzoyl, 4 (3,1 benzoxazin-4-on-2-yl)aniline, 1,3,5 tri(3,l-benzoxazin-4-on-2-yl)benzene, 1,3,5 tri(3,l benzoxazin-4-on-2-yl)naphthalene, or 2,4,6-tri(3,l-benzoxazin-4-on-2-yl)naphthalene; and combinations thereof.

20. The stabilized polymer composition according to claim 4, wherein the at least one moisture scavenger is a silane, preferably selected from vinyltrimethoxysilane, propyltrimethoxysilane, vinyltriethoxysilane, g- methacryloyloxypropylmethyldimethoxysilane and y- acryloxyloxypropylmethyltriethoxysilane,more preferably propyltrimethoxysilane.

21. The stabilized polymer composition according to any one of claims 1 to 20, wherein the at least one silyl-modified polymer has at least one end group represented by general formula 1 :

-A-(R~~~SiXYZ)_n (1), wherein

A is a divalent linking group comprising at least one heteroatom, R is a divalent hydrocarbon residue with C1-C12 atoms, and X, Y, Z are substituents on the Si atom and are, independently of one another, Ci-Cs alkyl, hydroxyl, Ci-Cs alkoxy or Ci-Cs acyloxy groups, wherein at least one of the residues X, Y, Z is a hydroxyl, Ci-Cs alkoxy or Ci-Cs acyloxy group, and n is 1-3, and wherein the at least one polymer is a polyether, polyurethane, polyurea, hydrocarbon polymer or a poly(meth)acrylic acid ester.

22. The stabilized polymer composition according to any one of claims 1 to 21, further comprising at least one adhesion promoter, plasticizer, filler, curing/condensation catalyst, liquid diluent; and combinations thereof.

23. Use of a stabilizer composition as defined in any of the preceding claims as stabilizer in sealants, adhesives and/or coatings based on at least one silyl-modified polymer.

24. The use according to claim 23, wherein the stabilizer composition improved heat stability and optionally UV stability of sealants, adhesives and/or coatings based on at least one silyl-modified polymer.

25. A method of improving thermal stability of silyl-modified polymer based adhesives, sealants and/or coatings comprising adding of at least one stabilizer composition as defined in any of the preceding claims to a stabilized polymer composition according to any one of claims 1 to 22.

26. A stabilizer composition for application in silyl-modified polymer based adhesives, sealants and/or coatings comprising: at least one hindered phenol antioxidant; and at least one hindered hydroxybenzoate, at least one moisture scavenger.

27. The stabilizer composition according to claim 26, wherein the stabilizer composition further comprises at least one hindered amine light stabilizer.

28. The stabilizer composition according to claims 26 or 27, wherein the stabilizer composition further comprises at least one UV absorber.

29. The stabilizer composition according to any one of claims 26 to 28, wherein the moisture scavenger is propyltrimethoxysilane.