WO2024115350A1 - Polyisocyanatgemisch - Google Patents
Polyisocyanatgemisch Download PDFInfo
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- WO2024115350A1 WO2024115350A1 PCT/EP2023/083099 EP2023083099W WO2024115350A1 WO 2024115350 A1 WO2024115350 A1 WO 2024115350A1 EP 2023083099 W EP2023083099 W EP 2023083099W WO 2024115350 A1 WO2024115350 A1 WO 2024115350A1
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- polyisocyanate mixture
- particularly preferably
- saturated
- polyisocyanate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/2805—Compounds having only one group containing active hydrogen
- C08G18/2815—Monohydroxy compounds
- C08G18/283—Compounds containing ether groups, e.g. oxyalkylated monohydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/2805—Compounds having only one group containing active hydrogen
- C08G18/2815—Monohydroxy compounds
- C08G18/284—Compounds containing ester groups, e.g. oxyalkylated monocarboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/73—Polyisocyanates or polyisothiocyanates acyclic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
- C08G18/78—Nitrogen
- C08G18/7806—Nitrogen containing -N-C=0 groups
- C08G18/7818—Nitrogen containing -N-C=0 groups containing ureum or ureum derivative groups
- C08G18/7837—Nitrogen containing -N-C=0 groups containing ureum or ureum derivative groups containing allophanate groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/80—Masked polyisocyanates
- C08G18/8061—Masked polyisocyanates masked with compounds having only one group containing active hydrogen
- C08G18/8064—Masked polyisocyanates masked with compounds having only one group containing active hydrogen with monohydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/721—Two or more polyisocyanates not provided for in one single group C08G18/73 - C08G18/80
- C08G18/725—Combination of polyisocyanates of C08G18/78 with other polyisocyanates
Definitions
- the present invention relates to a polyisocyanate mixture and a process for its preparation. Furthermore, the invention relates to a use of the polyisocyanate mixture, coating agents containing the polyisocyanate mixture and substrates coated with the coating agent.
- Two-component polyurethane paints (2K-PLIR) have gained importance for a wide range of different applications due to their excellent technological properties.
- Polyisocyanates based on linear aliphatic or cycloaliphatic diisocyanates are generally used as crosslinking components for light-resistant, non-yellowing 2K-PUR paints and coatings.
- polyisocyanates based on 1,6-diisocyanatohexane (hereinafter also referred to as HDI) are used today. These produce elastic coatings with good resistance to chemical and mechanical stress even at low temperatures.
- PDI polyisocyanates have higher viscosities than corresponding HDI derivatives with a comparable oligomer distribution (M. Widemann et al., ACS Sustainable Chem. Eng. 2018, 6, 9753-9759; DOI: http://dx.doi.org/10.1021/acssuschemeng.8b00758) and that larger quantities of organic solvents are generally required for their processing.
- the lowest possible proportion of volatile organic components is desired.
- US 2012/0016073 describes a process for the production of low-viscosity allophanate polyisocyanates based on monoalcohols containing ether or polyether groups, which can be used as reactive diluents for higher-viscosity polyisocyanates.
- Polymethylene diisocyanates with 2 to 6 methylene units are generally mentioned as suitable starting diisocyanates for this process, with HDI being the preferred starting diisocyanate.
- a A complex catalyst system consisting of bismuth compounds, preferably bismuth triscarboxylates, and alkali and alkaline earth salts as cocatalysts, is absolutely necessary.
- bismuth catalysts have the general disadvantage that they decompose during long-term storage and especially under the influence of daylight and often lead to a brown coloration or even precipitation of black particles in the polyisocyanate (D. Guhl, FAPU 49, 30 - 33 (2008), DOI: 10-1386-08-EPJ-2-2008-d.indd).
- Caillol et al. describe in Polymers 2021 , 13, 1255 (DOI: https://doi.org/10.3390/polym13081255) a commercial product manufactured by Vencorex TolonateTM X FLO 100 according to US 2012/0016073 as a partially bio-based polyisocyanate with an allophanate structure based on HDI and ethoxylated palmitic acid as a building component for thermosetting polyurethanes.
- the disadvantages mentioned above apply to the production of this product.
- the object of the present invention was to provide low-viscosity allophanate polyisocyanates which, regardless of the catalyst used and regardless of the residual urethane content, remain completely clear and cloud-free even after prolonged storage.
- the present invention relates to a polyisocyanate mixture containing at least one polyisocyanate of the general formula (I) in which R represents a linear or branched, saturated or unsaturated aliphatic and/or saturated or unsaturated cycloaliphatic radical having (6 to 22) - p carbon atoms, which may optionally be substituted,
- R' and R" independently of one another represent hydrogen or an aliphatic radical having 1 to 10 carbon atoms, where at least one of the radicals R' and R" represents hydrogen, n represents an integer from 1 to 12, m represents an integer from 1 to 10 and p represents 0 or 1.
- the invention also relates to a process for preparing the polyisocyanate mixtures according to the invention by reacting
- R represents a linear or branched, saturated or unsaturated aliphatic and/or saturated or unsaturated cycloaliphatic radical having (6 to 22) - p carbon atoms, each of which may optionally be substituted,
- R' and R" independently of one another represent hydrogen or an aliphatic radical having 1 to 10 carbon atoms, where at least one of the radicals R' and R" represents hydrogen, m represents an integer from 1 to 10 and p represents 0 or 1.
- PDI can be converted with ethoxylated fatty alcohols and/or fatty acids in a very simple manner, even using known allophanatization catalysts, such as zinc or zirconium catalysts, to form low-viscosity, light-colored allophanate polyisocyanates.
- allophanatization catalysts such as zinc or zirconium catalysts
- a particularly advantageous feature of using PDI is the fact that PDI allophanate polyisocyanates are significantly more stable to crystallization than HDI derivatives produced in an analogous manner, even with incomplete allophanatization, and the PDI polyisocyanates according to the invention remain completely clear and cloud-free even with a higher residual urethane content.
- At least one refers to 1 or more, for example 2, 3, 4, 5, 6, 7, 8, 9 or more. In the context of components of the compounds described herein, this statement does not refer to the absolute amount of molecules, but to the type of component. "At least one polyisocyanate” therefore means, for example, that only one type of polyisocyanate or several different types of polyisocyanates can be included, without specifying the amount of the individual compounds.
- the polyisocyanate mixture according to the invention particularly preferably contains more than 60 mol%, preferably more than 65 mol%, particularly preferably more than 70 mol%, even more preferably more than 75 mol% of proportions of allophanate structures determinable by NMR spectroscopy, based on the total amount of the molar proportions of allophanate, isocyanurate, urethane and uretdione structures.
- Numerical ranges specified in the format "in/from x to y" include the values specified. If multiple preferred numerical ranges are specified in this format, it is understood that all ranges resulting from the combination of the various endpoints are also included.
- aliphatic is defined as non-aromatic hydrocarbon groups that are saturated or unsaturated.
- aromatic is defined as aliphatic hydrocarbon radicals that are saturated or unsaturated and have at least one aromatic substituent.
- alicyclic or “cycloaliphatic” is defined as optionally substituted carbocyclic or heterocyclic compounds or moieties that are not aromatic (such as cycloalkanes, cycloalkenes or oxa-, thia-, aza- or thiazacycloalkanes). Particular examples are cyclohexyl groups, cyclopentyl groups and their N- or O-heterocyclic derivatives such as pyrimidine, pyrazine, tetrahydropyran or tetrahydrofuran.
- suitable substituents are -F, -Cl, -Br, -I, -OH, -OCH3, OCH2CH3, -O-isopropyl or -on-propyl, -OCF3, -CF3, -S-Ci-6-alkyl and/or (optionally via an attached heteroatom) a linear or branched, aliphatic and/or alicyclic structural unit having 1 to 12 carbon atoms, each of which acts as a replacement for a carbon-bonded hydrogen atom of the molecule in question.
- Preferred substituents are halogen (in particular -F, -Cl), Ci-6-alkoxy (in particular methoxy and ethoxy), hydroxy, trifluoromethyl and trifluoromethoxy, each of which acts as a replacement for a carbon-bonded hydrogen atom of the molecule in question.
- the polyisocyanate mixture according to the invention has an NCO content of 6.0 to 18.0 wt. %, preferably 8.0 to 16.0 wt. %, particularly preferably 10.0 to 15.0 wt. %, based on the total weight of the polyisocyanate mixture, and/or a residual monomer content of less than 0.14 wt. %, preferably less than 0.12 wt. %, and particularly preferably less than 0.10 wt. %, based on the total weight of the polyisocyanate mixture, measured by gas chromatography with an internal standard in accordance with DIN EN ISO 10283:2007-11.
- the polyisocyanate mixture according to the invention has a viscosity at 23°C of less than 500 mPas, preferably less than 400 mPas and particularly preferably less than 300 mPas, measured according to DIN EN ISO 3219:1994-10 at a shear rate of 250 s -1 .
- R represents a linear or branched, saturated or unsaturated aliphatic and/or saturated or unsaturated cycloaliphatic radical having (8 to 20) - p, particularly preferably having (10 to 18) - p and very particularly preferably having (12 to 14) - p carbon atoms, which may optionally be substituted,
- R' and R“ independently of one another represent hydrogen or an aliphatic radical having 1 to 10 carbon atoms, where at least one of the radicals R' and R“ represents hydrogen, n represents an integer from 1 to 12, m is an integer from 1 to 7, particularly preferably an integer from 2 to 5 and most preferably an integer from 2 to 4, and p is 0 or 1.
- the diisocyanate component A) used to prepare the polyisocyanate mixtures according to the invention contains at least 1,5-diisocyanatopentane (also referred to herein as pentamethylene diisocyanate or PDI), which is accessible in various ways, for example by phosgenation in the liquid or gas phase or by a phosgene-free route, such as by thermal urethane cleavage, starting from 1,5-diaminopentane obtained preferably biotechnologically by decarboxylation of the naturally occurring amino acid lysine.
- 1,5-diisocyanatopentane also referred to herein as pentamethylene diisocyanate or PDI
- PDI pentamethylene diisocyanate
- diisocyanate component A can be used in the diisocyanate component A), which are also obtainable by phosgenation or by a phosgene-free route.
- molecular weight range 140 to 400 such as 1,4-diisocyanatobutane, 1,6-diisocyanatohexane (HDI), 2-methyl-1,5-diisocyanatopentane, 1,5-diisocyanato-2,2-dimethylpentane, 2,2,4- or 2,4,4-trimethyl-1,6-diisocyanatohexane, 1,10-diisocyanatodecane,
- HDI 1,6-diisocyanatohexane
- HDI 1,6-diisocyanatohexane
- 1,5-diisocyanato-2,2-dimethylpentane 1,5-diisocyanato-2,2-dimethylpentane
- 2,2,4- or 2,4,4-trimethyl-1,6-diisocyanatohexane 1,10-diisocyanatodecane
- TDI 2,4- and 2,6-diisocyanatotoluene
- MDI 2,4'- and 4,4'-diisocyanatodiphenylmethane
- 1,5-diisocyanatonaphthalene or any mixtures of such diisocyanates are examples of 2,4- and 2,6-diisocyanatotoluene (TDI), 2,4'- and 4,4'-diisocyanatodiphenylmethane (MDI), 1,5-diisocyanatonaphthalene or any mixtures of such diisocyanates.
- diisocyanates which may be used in the diisocyanate component A) in the preparation of the polyisocyanate mixtures according to the invention are used, if at all, in amounts of up to 40% by weight, preferably up to 30% by weight, particularly preferably up to 20% by weight and very particularly preferably up to 10% by weight, based on the total amount of diisocyanates used.
- the diisocyanate component A) contains at least 60% by weight, preferably at least 70% by weight, particularly preferably at least 80% by weight and very particularly preferably at least 90% by weight, based on the diisocyanate component A), of 1,5-pentamethylene diisocyanate and optionally further diisocyanates with aliphatically, cycloaliphatically, araliphatically and/or aromatically bound isocyanate groups in an amount of up to 40% by weight, preferably up to 30% by weight, particularly preferably up to 20 wt.% and very particularly preferably up to 10 wt.%, based on the diisocyanate component A).
- a further preferred embodiment relates to a process for preparing a polyisocyanate mixture, preferably the polyisocyanate mixture according to the invention, by reacting
- R represents a linear or branched, saturated or unsaturated aliphatic and/or saturated or unsaturated cycloaliphatic radical having (6 to 22) - p carbon atoms, each of which may optionally be substituted,
- R' and R" independently of one another represent hydrogen or an aliphatic radical having 1 to 10 carbon atoms, where at least one of the radicals R' and R" represents hydrogen, m represents an integer from 1 to 10 and p represents 0 or 1.
- alcoholic component B) in the process according to the invention at least one alcohol of the general formula (II) used in which
- R represents a linear or branched, saturated or unsaturated aliphatic and/or saturated or unsaturated cycloaliphatic radical having (6 to 22) - p, preferably having (8 to 20) - p, particularly preferably having (10 to 18) - p and very particularly preferably having (12 to 14) - p carbon atoms, which may in each case be optionally substituted,
- R' and R“ independently represent hydrogen or an aliphatic radical having 1 to 10 carbon atoms, where at least one of the radicals R' and R“ represents hydrogen, and m is an integer from 1 to 10, preferably an integer from 1 to 7, particularly preferably an integer from 2 to 5 and most particularly preferably an integer from 2 to 4, and p is 0 or 1.
- These alcohols are, for example, the known alkoxylation products of fatty alcohols of the general formula (III)
- R 1 represents a linear or branched, saturated or unsaturated aliphatic and/or saturated or unsaturated cycloaliphatic radical having 6 to 22, preferably 8 to 20, particularly preferably 10 to 18, very particularly preferably 12 to 14 carbon atoms, which may in each case be optionally substituted, and/or fatty acids of the general formula (IV)
- R 2 represents a linear or branched, saturated or unsaturated aliphatic and/or saturated or unsaturated cycloaliphatic radical having 5 to 21, preferably 7 to 19, particularly preferably 9 to 17, very particularly preferably 11 to 13 carbon atoms, which in each case may optionally be substituted.
- radicals R 1 and also R examples of suitable, preferred and particularly preferred radicals are the radicals derived from the fatty alcohols mentioned below as examples of suitable, preferred and particularly preferred.
- fatty acids of the general formula (IV) and the general formula (II) in the general formula (I) and the general formula (II), p stands for 1 and R 2 stands for R, including the stated preferences for R 2 .
- R 2 and also R examples of suitable, preferred and particularly preferred radicals are the radicals derived from the fatty acids mentioned below as examples of suitable, preferred and particularly preferred.
- Fatty alcohols suitable for alkoxylation are, for example, 1-hexanol (caproic alcohol), 1-heptanol (enanthic alcohol), 1-octanol (caprylic alcohol), 1-nonyl alcohol (pelargonic alcohol), 1-decanol (capric alcohol), 1-dodecanol (lauryl alcohol), 1-tetradecanol (myristyl alcohol), 1- Hexadecanol (cetyl alcohol), 1-heptadecanol (margaryl alcohol), 1-octadecanol (stearyl alcohol), 1-eicosanol (arachidyl alcohol), 1-docosanol (behenyl alcohol), 1-tetracosanol (lignoceryl alcohol), 1-hexacosanol (ceryl alcohol), 1-octacosanol (montanyl alcohol), 1-triacontanol (melissyl alcohol), c/s-9-hexadecen-1-ol
- Preferred fatty alcohols and fatty acids are those that have been produced using vegetable and animal oils and fats.
- Particularly preferred fatty alcohols for producing the alcoholic component B) are 1-decanol, 1-dodecanol, 1-tetradecanol and 1-octadecanol, very particularly preferably 1-dodecanol and 1-tetradecanol, particularly preferred fatty acids are decanoic acid, dodecanoic acid, tetradecanoic acid and hexadecanoic acid, very particularly preferably dodecanoic acid, tetradecanoic acid.
- alkylene oxides with 2 to 12 carbon atoms such as ethylene oxide, propylene oxide, 1,2-epoxybutane, 1,2-epoxyhexane, 1,2-epoxyoctane or 1,2-epoxydodecane, are suitable for producing the alcoholic component B) by alkoxylation of the fatty alcohols and/or fatty acids mentioned, which can be used in any order or in a mixture in the alkoxylation reaction.
- Preferred alkylene oxides are those having 2 to 4 carbon atoms.
- Particularly preferred alkylene oxides for preparing the alcoholic component B) are ethylene oxide and propylene oxide.
- R' and R" in the general formula (I) and/or formula (II) independently of one another represent hydrogen or an aliphatic radical having preferably 1 to 2 carbon atoms, where at least one of the radicals R' and R" represents hydrogen.
- Suitable alcoholic components B) for the preparation of the polyisocyanate mixtures according to the invention are in particular alkoxylation products of the fatty acids and/or fatty alcohols mentioned, which have on average 1 to 10, preferably 1 to 7, particularly preferably 2 to 5 and very particularly preferably 2 to 4 alkylene oxide units.
- the numbers and number ranges mentioned above as statistical means give the inventive and preferred integers m in the general formula (I) and the general formula (II).
- alkoxylation products are used as alcoholic component B) which have on average 1 to 10, preferably 1 to 7, particularly preferably 2 to 5 and very particularly preferably 2 to 4 alkylene oxide units, where the alkylene oxide units preferably comprise or consist of ethylene oxide and/or propylene oxide units.
- the numbers and number ranges mentioned above as statistical averages result in the inventive and preferred integers m in the general formula (I) and the general formula (II).
- the alcoholic components B) preferably have a pH value, measured on a 1% solution of the respective alcoholic component B) in water, of 4.0 to 8.0, preferably 4.5 to 7.5, particularly preferably 5.0 to 7.0 and/or total contents of alkali cations of at most 100 ppm, preferably 1 to 70 ppm, particularly preferably 2 to 50 ppm.
- component B) may contain, in addition to the alkoxylation products of fatty alcohols and/or fatty acids mentioned above, other alcoholic compounds in minor amounts.
- monoalcohols such as methanol, ethanol, n-propanol, isopropanol, n-butanol, isobutanol, sec-butanol, the isomers pentanool, hexanool, octanols and nonanols, n-decanol, n-dodecanol, n-tetradecanol, n-hexadecanol, n-octadecanol, cyclohexanol, the isomers methylcyclohexanols, hydroxymethylcyclohexane, 3-methyl-3-hydroxymethyloxetane, benzyl alcohol, phenol, the isomers cresols, octylphenols, nonylphenols and naphthols, furfuryl alcohol and tetrahydrofurfuryl alcohol, unbranched aliphatic diol
- B 1,2-ethanediol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,7-heptanediol and 1,8-octanediol, cycloaliphatic diols such as B. 1,2- and 1,4-cyclohexanediol, 1,4-cyclohexanedimethanol, 4,4'-(1-methylethylidene)-biscyclohexanol, triols such as B.
- 1,2,3-propanetriol 1,1,1-trimethylolethane, 1,2,6-hexanetriol, 1,1,1-trimethylolpropane and 1,3,5-tris(2-hydroxyethyl)isocyanurate, tetrafunctional alcohols such as B. B. 2,2-bis(hydroxymethyl)-1,3-propanediol or any mixtures of such alcohols.
- these further alcoholic compounds are used in the process according to the invention in amounts of not more than 25% by weight, preferably not more than 20% by weight, particularly preferably not more than 15% by weight, based on the amount of alkoxylation products of fatty alcohols and/or fatty acids used.
- the diisocyanate component A) containing at least 1,5-diisocyanatopentane is reacted with at least one alcoholic component B) to form allophanate polyisocyanates, preferably at temperatures of 40 to 200 °C, particularly preferably 60 to 180 °C, and/or while maintaining an equivalent ratio of isocyanate groups to isocyanate-reactive groups of preferably 4:1 to 50:1, particularly preferably 5:1 to 30:1, very particularly preferably 10:1 to 25:1.
- the process according to the invention can be carried out uncatalyzed as a thermally induced allophanatization.
- suitable catalysts are preferably used to accelerate the allophanatization reaction.
- These are the usual known allophanatization catalysts, for example metal carboxylates, metal chelates or tertiary amines of the type described in GB-A-0994890 (page 2, lines 73 to 87), alkylating agents of the type described in US-A-3 769 318 (column 6, lines 5 to 49) or strong acids as described by way of example in EP-A-0 000 194 (page 13, line 27 to page 14, lines 1 to 18).
- Suitable allophanatization catalysts are in particular zinc compounds, such as zinc (II) stearate, zinc (II) n-octanoate, zinc (II) 2-ethyl-1-hexanoate, zinc (II) naphthenate or zinc (II) acetylacetonate, tin compounds, such as tin (II) n-octanoate, tin (II) 2-ethyl-1-hexanoate, tin (II) laurate, dibutyltin oxide, dibutyltin dichloride, dibutyltin diacetate, dibutyltin dilaurate, dibutyltin dimaleate or dioctyltin diacetate, zirconium compounds, such as.
- zinc compounds such as zinc (II) stearate, zinc (II) n-octanoate, zinc (II) 2-ethyl-1-
- Suitable, although less preferred, catalysts for the process according to the invention are also those compounds which, in addition to the allophanatization reaction, also catalyze the trimerization of isocyanate groups to form isocyanurate structures.
- Such catalysts are described, for example, in EP-A-0 649 866, page 4, line 7 to page 5, line 15.
- Preferred catalysts for the process according to the invention are zinc and/or zirconium compounds of the type mentioned above.
- the use of at least zinc (II) n-octanoate, zinc (II) 2-ethyl-1-hexanoate and/or zinc (II) stearate, zirconium (IV) n-octanoate, zirconium (IV) 2-ethyl-1-hexanoate and/or zirconium (IV) neodecanoate is very particularly preferred.
- These catalysts are used in the process according to the invention, if at all, preferably in an amount of 0.001 to 5 wt. %, particularly preferably 0.005 to 1 wt. %, based on the total weight of the reactants A) and B), and can be added both before the start of the reaction and at any time during the reaction.
- lead octoate is not used as a catalyst in the process according to the invention and thus a polyisocyanate mixture according to the invention is preferred which is free from catalytic amounts, particularly preferably free from detectable amounts of lead octoate.
- the process according to the invention is preferably carried out without solvents.
- suitable solvents which are inert towards the reactive groups of the starting components can also be used if necessary.
- suitable solvents are, for example, the conventional paint solvents known per se, such as, for example, ethyl acetate.
- the starting component A) containing at least PDI is optionally introduced under an inert gas, such as nitrogen, and optionally in the presence of a suitable solvent of the type mentioned, at a temperature between 20 and 100°C.
- the alcoholic component B) is then added in the amount indicated above and the reaction temperature for the urethanization is optionally adjusted by a suitable measure (heating or cooling) to a temperature of 30 to 120°C, preferably 50 to 100°C.
- the allophanatization can be started, for example without the addition of a catalyst, by heating the reaction mixture to a temperature of 140 to 200°C.
- suitable catalysts of the type mentioned above are preferably used to accelerate the allophanatization reaction, whereby depending on the type and Amount of catalyst used Temperatures in the range of 60 to 140°C, preferably 80 to 120°C, are usually sufficient.
- the catalyst which may be used is mixed into either the starting component A) containing at least PDI and/or the alcoholic component B) before the actual reaction begins.
- the urethane groups which form as intermediates react spontaneously to form the desired allophanate structure.
- the starting component A) which may contain the catalyst is introduced optionally under an inert gas, such as nitrogen, and optionally in the presence of a suitable solvent of the type mentioned, generally at temperatures in the range of 60 to 140°C, preferably 80 to 120°C, which are optimal for allophanatization, and is reacted with the alcoholic component B) which may contain the catalyst.
- a temperature in the range of 30 to 120°C, preferably 50 to 100°C is generally set for the pure urethanization reaction which takes place before the catalyst is added.
- the allophanatization reaction is finally carried out at temperatures of generally 60 to 140°C, preferably 80 to 120°C.
- the course of the reaction can be monitored in the process according to the invention by, for example, titrimetric determination of the NCO content in accordance with DIN EN ISO 11909:2007-05.
- the degree of allophanatization i.e. the percentage of urethane groups converted to allophanate groups and formed as intermediates from the hydroxyl groups of component B
- the reaction is terminated. In the case of a purely thermal reaction, this can be done, for example, by cooling the reaction mixture to room temperature.
- suitable catalyst poisons for example acids such as phosphoric acid or acid chlorides such as benzoyl chloride or isophthaloyl dichloride.
- the reaction mixture is then purified by thin-film distillation under high vacuum, for example at a pressure of less than 1.0 mbar, preferably less than 0.5 mbar, particularly preferably below 0.2 mbar, under the gentlest possible conditions, for example at a temperature of 100 to 200 °C, preferably 120 to 180 °C, to remove volatile constituents (excess monomeric diisocyanates, any solvents used and, if a catalyst poison is not used, any active catalyst).
- high vacuum for example at a pressure of less than 1.0 mbar, preferably less than 0.5 mbar, particularly preferably below 0.2 mbar, under the gentlest possible conditions, for example at a temperature of 100 to 200 °C, preferably 120 to 180 °C, to remove volatile constituents (excess monomeric diisocyanates, any solvents used and, if a catalyst poison is not used, any active catalyst).
- the resulting distillates which contain, in addition to the unreacted monomeric starting diisocyanates and any solvents used, possibly active catalyst if a catalyst poison is not used, can be used without any problem for renewed allophanatization in the process according to the invention.
- the volatile constituents mentioned are separated from the oligomerization product by extraction with suitable solvents which are inert towards isocyanate groups, for example aliphatic or cycloaliphatic hydrocarbons such as pentane, hexane, heptane, cyclopentane or cyclohexane.
- suitable solvents which are inert towards isocyanate groups, for example aliphatic or cycloaliphatic hydrocarbons such as pentane, hexane, heptane, cyclopentane or cyclohexane.
- the products obtained from the process according to the invention are clear, practically colorless polyisocyanate mixtures which, based on the solvent-free solid resin, have color numbers of less than 100 APHA, preferably less than 80 APHA, particularly preferably less than 60 APHA, and/or an NCO content of 6.0 to 18.0% by weight, preferably 8.0 to 16.0% by weight, particularly preferably 10.0 to 15.0% by weight, and/or a residual monomer content of less than 0.14% by weight, preferably less than 0.12% by weight, and particularly preferably less than 0.10% by weight, measured by gas chromatography with an internal standard in accordance with DIN EN ISO 10283:2007-11.
- the viscosities of the polyisocyanate mixtures according to the invention are preferably less than 500 mPas, particularly preferably less than 400 mPas, very particularly preferably less than 300 mPas.
- the polyisocyanate mixtures according to the invention are completely stable to crystallization and remain completely clear and free of turbidity even at 5°C and after four weeks of storage.
- the polyisocyanate mixtures according to the invention have a residual urethane content of less than 20 mol%, preferably less than 15 mol% and particularly preferably less than 10 mol%, calculated from the integrals of proton-decoupled 13 C-NMR spectra and based on the sum of the allophanate, urethane, isocyanurate structures and/or uretdione structures present in the polyisocyanate mixture according to the invention.
- the “polyisocyanate mixture” according to the invention refers to the oligomer mixture which results from statistical distribution, therefore the polyisocyanate mixture according to the invention can also be referred to as the polyisocyanate according to the invention.
- the invention relates to a polyisocyanate of the general formula (I) in which
- R represents a linear or branched, saturated or unsaturated aliphatic and/or saturated or unsaturated cycloaliphatic radical having (6 to 22) - p carbon atoms, which may optionally be substituted,
- R' and R" independently of one another represent hydrogen or an aliphatic radical having 1 to 10 carbon atoms, where at least one of the radicals R' and R" represents hydrogen, n represents an integer from 1 to 12, m represents an integer from 1 to 10 and p represents 0 or 1.
- the invention relates to a process for producing a polyisocyanate, preferably the polyisocyanate according to the invention, by reacting
- R represents a linear or branched, saturated or unsaturated aliphatic and/or saturated or unsaturated cycloaliphatic radical having (6 to 22) - p carbon atoms, each of which may optionally be substituted,
- R' and R“ independently of one another represent hydrogen or an aliphatic radical having 1 to 10 carbon atoms, where at least one of the radicals R' and R“ represents hydrogen, m represents an integer from 1 to 10 and p represents 0 or 1.
- polyisocyanate mixtures according to the invention predominantly have allophanate structures as structural elements, they can also be referred to synonymously as allophanate polyisocyanates according to the invention or as PDI-based allophanate polyisocyanates according to the invention.
- the polyisocyanate mixtures according to the invention represent valuable starting materials for the production of polyurethane plastics by the isocyanate polyaddition process. Therefore, a further subject of the invention is the use of the polyisocyanate mixture according to the invention as a starting component in the production of polyurethane plastics.
- polyisocyanate mixtures according to the invention are outstandingly suitable as hardeners for two-component polyurethane coatings in which the usual polyether polyols, polyester polyols, polycarbonate polyols and/or polyacrylate polyols are present as hydroxy-functional components as reaction partners for the polyisocyanates.
- Preferred hydroxy-functional components are polyacrylate polyols, i.e. polymers or copolymers of (meth)acrylic acid alkyl esters, optionally with styrene or other copolymerizable olefinically unsaturated monomers.
- polyisocyanates can be used either as the sole crosslinking component or, due to their low viscosity, particularly advantageously also as reactive diluents for higher-viscosity polyisocyanates, in particular those with uretdione, isocyanurate, iminooxadiazinedione, urethane, allophanate, biuret and/or oxadiazinetrione structure, which carry aliphatically, cycloaliphatically, araliphatically and/or aromatically bound isocyanate groups, preferably those based on PDI.
- polyisocyanate mixture according to the invention for diluting higher-viscosity polyisocyanates, preferably higher-viscosity polyisocyanates based on 1,5-diisocyanatopentane, while at the same time maintaining the reactivity is a further subject of the present invention.
- the invention also further relates to the use of the polyisocyanate mixture according to the invention for mixing with polyisocyanates with uretdione, isocyanurate, iminooxadiazinedione, urethane, allophanate, biuret and/or oxadiazinetrione structure, which carry aliphatically, cycloaliphatically, araliphatically and/or aromatically bound isocyanate groups, preferably those based on 1,5-diisocyanatopentane.
- the present invention also relates to the above-mentioned mixtures of the polyisocyanate mixture according to the invention and polyisocyanates with uretdione, isocyanurate, iminooxadiazinedione, urethane, allophanate, biuret and/or oxadiazinetrione structure, which carry aliphatically, cycloaliphatically, araliphatically and/or aromatically bound isocyanate groups. and/or aromatically bound isocyanate groups, preferably those based on 1,5-diisocyanatopentane.
- the allophanate polyisocyanates or polyisocyanate mixtures according to the invention can be used solvent-free due to their low viscosity, they can also be diluted without clouding with conventional solvents, for example the previously mentioned solvents that are inert to isocyanates and may optionally be used in the process according to the invention.
- the coating compositions formulated with the polyisocyanates according to the invention, to which the auxiliaries and additives customary in the paint sector, such as flow control agents, color pigments, fillers or matting agents, may optionally be incorporated have good paint properties even when dried at room temperature. Of course, they can also be dried under forced conditions at elevated temperatures or by baking at temperatures of up to 260 °C.
- suitable catalysts can be used when formulating the coating agents, for example the catalysts commonly used in isocyanate chemistry, such as tertiary amines such as triethylamine, pyridine, methylpyridine, benzyldimethylamine, N,N-endoethylenepiperazine, N-methylpiperidine, pentamethyldiethylenetriamine, N,N-dimethylaminocyclohexane, N,N'-dimethylpiperazine or metal salts such as iron(III) chloride, zinc chloride, zinc 2-ethylcaproate, tin(II) octanoate, tin(II) ethylcaproate, dibutyltin(IV) dilaurate, bismuth(III) 2-ethylhexanoate, bismuth(III) octoate or molybdenum glycolate.
- tertiary amines such as triethylamine, pyridine,
- the allophanate polyisocyanates according to the invention are also suitable as crosslinking components for binders or binder components dissolved or dispersed in water with groups reactive towards isocyanate groups, in particular alcoholic hydroxyl groups, in the production of aqueous two-component polyurethane systems. Due to their low viscosity, they can be used either as such, i.e. in hydrophobic form, or in a form modified to be hydrophilic using known processes, e.g. according to EP-B 0 540 985, EP-B 0 959 087 or EP-B 1 287 052.
- the allophanate polyisocyanates according to the invention can also be combined with polyamines, such as the polyaspartic acid derivatives known from EP-B 0 403 921, which can be obtained by reacting diamines with fumaric acid or maleic acid esters, or with polyamines whose amino groups are in blocked form, such as polyketimines, polyaldimines or oxazolanes. Under the influence of moisture, these blocked amino groups form free amino groups and, in the case of oxazolanes, also free hydro- xyl groups which react by crosslinking with the isocyanate groups of the polyisocyanates according to the invention.
- polyamines such as the polyaspartic acid derivatives known from EP-B 0 403 921, which can be obtained by reacting diamines with fumaric acid or maleic acid esters, or with polyamines whose amino groups are in blocked form, such as polyketimines, polyaldimines or oxazolanes. Under the influence of moisture, these
- the allophanate polyisocyanates according to the invention can also be combined with compounds which have at least one thiol group.
- polythiols known from EP-A 3 872 108 such as simple alkanethiols, polythiols containing thioether groups, polyetherthiols, polyesterthiols, aromatic thio compounds and/or mercapto alcohols.
- the isocyanate groups of the allophanate polyisocyanates according to the invention can be partially or completely reacted with at least one blocking agent.
- blocking agents are in particular blocking agents known per se from polyurethane chemistry, such as malonic acid diethyl ester, acetoacetic ester, activated cyclic ketones, such as cyclopentanone-2-carboxymethyl ester and -carboxyethyl ester, acetone oxime, butanone oxime, s-caprolactam, 3,5-dimethylpyrazole, 1,2,4-triazole, dimethyl-1,2,4-triazole, imidazole, diisopropylamine, benzyl-tert-butylamine or any mixtures of these blocking agents.
- blocking agents known per se from polyurethane chemistry, such as malonic acid diethyl ester, acetoacetic ester, activated cyclic ketones, such as cyclopentanone-2-carboxymethyl ester and -carboxyethyl ester, acetone oxime, butanone oxime, s-caprolactam, 3,5
- the polyisocyanates according to the invention can also be used in combination with the above-mentioned paint binders or paint binder components in the sense of one-component PUR stoving systems.
- the polyisocyanates according to the invention and the reactants are present in such amounts that 0.5 to 3, preferably 0.6 to 2.0, particularly preferably 0.8 to 1.6, optionally blocked groups that are reactive toward isocyanates are present for each optionally blocked isocyanate group.
- the allophanate polyisocyanates according to the invention can also be mixed in minor amounts with non-functional paint binders to achieve very specific properties, for example as an additive to improve adhesion.
- Any substrate can be considered as a substrate for the coatings formulated with the aid of the polyisocyanates according to the invention, such as metal, wood, glass, stone, ceramic materials, concrete, hard and flexible plastics, textiles, leather and paper, which can optionally also be provided with conventional primers before coating.
- compositions containing the allophanate polyisocyanates according to the invention as well as a substrate which is at least partially coated with a polyurethane, polyurea and/or polythiourethane and/or at least one polyisocyanate mixture according to the invention and/or at least one coating agent according to the invention.
- the coating compositions according to the invention can be present, for example, as a two-component system comprising a crosslinker component containing at least one polyisocyanate mixture according to the invention and a binder component containing at least one paint binder or a paint binder component with groups reactive toward isocyanate groups, or as a one-component system containing at least one polyisocyanate mixture according to the invention in blocked form.
- a crosslinker component containing at least one polyisocyanate mixture according to the invention and a binder component containing at least one paint binder or a paint binder component with groups reactive toward isocyanate groups
- a one-component system containing at least one polyisocyanate mixture according to the invention in blocked form are also the subject of the present invention.
- the polyisocyanates according to the invention are outstandingly suitable as crosslinkers for solvent-free or solvent-containing adhesive binders or aqueous dispersion adhesives, or also as a building component for the production of lightfast compact or foamed polyurethane moldings.
- polyurethanes polyurea and/or polythiourethanes, obtainable or prepared by reacting at least one polyisocyanate mixture according to the invention with at least one hydroxy-, amino- and/or thiofunctional component.
- the NCO content was determined titrimetrically according to DIN EN ISO 11909:2007-05.
- the residual monomer contents were measured by gas chromatography with an internal standard according to DIN EN ISO 10283:2007-11.
- the contents of sodium and potassium cations were determined by inductively coupled plasma atomic emission spectrometry (ICP-OES) according to DIN EN ISO 11885:2009-09 after microwave digestion.
- the detection limit for this method is ⁇ 1 ppm.
- the platinum-cobalt color number was measured spectrophotometrically according to DIN EN ISO 6271-2:2005-03 using a LICO 400 spectrophotometer from Lange, DE.
- the contents (mol %) of the allophanate, urethane and optionally isocyanurate and/or uretdione structures present in the polyisocyanates according to the invention were calculated from the integrals of proton-decoupled 13 C-NMR spectra (recorded on a Bruker DPX-400 device) and relate in each case to the sum of allophanate, urethane, isocyanurate and/or uretdione structures present.
- the catalyst was deactivated by adding 0.16 g of ortho-phosphoric acid and the unreacted monomeric PDI was evaporated in a thin film evaporator at a temperature of 130°C and a pressure of 0.1 mbar. separated. 679 g of a practically colorless, clear allophanate polyisocyanate were obtained with the following characteristics:
- the catalyst was deactivated by adding 0.16 g of ortho-phosphoric acid and the unreacted monomeric PDI was separated off in a thin-film evaporator at a temperature of 130°C and a pressure of 0.1 mbar. 666 g of a practically colorless, clear polyisocyanate mixture were obtained, which had the following characteristics and composition:
- the catalyst was deactivated by adding 0.17 g of ortho-phosphoric acid and the unreacted monomeric HDI was separated off in a thin-film evaporator at a temperature of 130°C and a pressure of 0.1 mbar. 715 g of a practically colorless allophanate polyisocyanate with the following characteristics were obtained:
- the catalyst was deactivated by adding 0.16 g of ortho-phosphoric acid and the unreacted monomeric diisocyanates were separated off in a thin-film evaporator at a temperature of 130°C and a pressure of 0.1 mbar. This gave 677 g of a practically colorless, clear polyisocyanate mixture with the following characteristics and composition:
- the catalyst was deactivated by adding 0.32 g of ortho-phosphoric acid and the unreacted monomeric PDI was separated off in a thin-film evaporator at a temperature of 130°C and a pressure of 0.1 mbar. 658 g of a practically colorless, clear polyisocyanate mixture were obtained, which had the following characteristics and composition:
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- Polymers & Plastics (AREA)
- Life Sciences & Earth Sciences (AREA)
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Abstract
Description
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Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2025530647A JP2025538306A (ja) | 2022-11-29 | 2023-11-27 | ポリイソシアネート混合物 |
| EP23810400.4A EP4626943A1 (de) | 2022-11-29 | 2023-11-27 | Polyisocyanatgemisch |
| CN202380080511.6A CN120303315A (zh) | 2022-11-29 | 2023-11-27 | 多异氰酸酯混合物 |
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP22210094 | 2022-11-29 | ||
| EP22210094.3 | 2022-11-29 | ||
| EP23192137 | 2023-08-18 | ||
| EP23192136.2 | 2023-08-18 | ||
| EP23192137.0 | 2023-08-18 | ||
| EP23192136 | 2023-08-18 |
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| WO2024115350A1 true WO2024115350A1 (de) | 2024-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/EP2023/083099 Ceased WO2024115350A1 (de) | 2022-11-29 | 2023-11-27 | Polyisocyanatgemisch |
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|---|---|
| EP (1) | EP4626943A1 (de) |
| JP (1) | JP2025538306A (de) |
| CN (1) | CN120303315A (de) |
| WO (1) | WO2024115350A1 (de) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB994890A (en) | 1961-12-18 | 1965-06-10 | Ici Ltd | New organic polyisocyanates and their manufacture |
| US3769318A (en) | 1970-02-27 | 1973-10-30 | Bayer Ag | Process for the production of allophanate polyisocyanates |
| EP0000194A1 (de) | 1977-07-02 | 1979-01-10 | Bayer Ag | Verfahren zur Herstellung von Isocyanatgruppen aufweisenden Allophanaten und ihre Verwendung zur Herstellung von Lackierungen |
| EP0403921B1 (de) | 1989-06-23 | 1994-11-02 | Bayer Ag | Verfahren zur Herstellung von Überzügen |
| EP0649866A1 (de) | 1993-10-20 | 1995-04-26 | Bayer Ag | Lackpolyisocyanate und ihre Verwendung |
| EP0540985B1 (de) | 1991-11-07 | 1996-01-03 | Bayer Ag | Wasserdispergierbare Polyisocyanatgemische |
| EP0959087B1 (de) | 1998-05-22 | 2003-10-15 | Bayer Aktiengesellschaft | Wasserdispergierbare Polyether-modifizierte Polyisocyanatgemische |
| EP1287052B1 (de) | 2000-05-18 | 2004-08-04 | Bayer MaterialScience AG | Modifizierte polyisocyanate |
| US20120016073A1 (en) | 2008-12-08 | 2012-01-19 | Perstorp France | Method for preparing an allophanate, allophanate, and low-viscosity composition containing the allophanate |
| US20160083503A1 (en) * | 2011-03-09 | 2016-03-24 | Mitsui Chemicals, Inc. | Pentamethylenediisocyanate, method for producing pentamethylenediisocyanate, polyisocyanate composition, polyurethane resin, and polyurea resin |
| WO2016169810A1 (de) | 2015-04-20 | 2016-10-27 | Basf Se | Zweikomponentige beschichtungsmassen |
| EP3271432A1 (de) | 2015-03-16 | 2018-01-24 | Covestro Deutschland AG | Polyisocyanatzusammensetzung auf basis von 1,5-pentamethylendiisocyanat |
| EP3872108A1 (de) | 2020-02-28 | 2021-09-01 | Covestro Intellectual Property GmbH & Co. KG | Uretdiongruppen enthaltende zusammensetzungen |
-
2023
- 2023-11-27 JP JP2025530647A patent/JP2025538306A/ja active Pending
- 2023-11-27 WO PCT/EP2023/083099 patent/WO2024115350A1/de not_active Ceased
- 2023-11-27 EP EP23810400.4A patent/EP4626943A1/de active Pending
- 2023-11-27 CN CN202380080511.6A patent/CN120303315A/zh active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB994890A (en) | 1961-12-18 | 1965-06-10 | Ici Ltd | New organic polyisocyanates and their manufacture |
| US3769318A (en) | 1970-02-27 | 1973-10-30 | Bayer Ag | Process for the production of allophanate polyisocyanates |
| EP0000194A1 (de) | 1977-07-02 | 1979-01-10 | Bayer Ag | Verfahren zur Herstellung von Isocyanatgruppen aufweisenden Allophanaten und ihre Verwendung zur Herstellung von Lackierungen |
| EP0403921B1 (de) | 1989-06-23 | 1994-11-02 | Bayer Ag | Verfahren zur Herstellung von Überzügen |
| EP0540985B1 (de) | 1991-11-07 | 1996-01-03 | Bayer Ag | Wasserdispergierbare Polyisocyanatgemische |
| EP0649866A1 (de) | 1993-10-20 | 1995-04-26 | Bayer Ag | Lackpolyisocyanate und ihre Verwendung |
| EP0959087B1 (de) | 1998-05-22 | 2003-10-15 | Bayer Aktiengesellschaft | Wasserdispergierbare Polyether-modifizierte Polyisocyanatgemische |
| EP1287052B1 (de) | 2000-05-18 | 2004-08-04 | Bayer MaterialScience AG | Modifizierte polyisocyanate |
| US20120016073A1 (en) | 2008-12-08 | 2012-01-19 | Perstorp France | Method for preparing an allophanate, allophanate, and low-viscosity composition containing the allophanate |
| US20160083503A1 (en) * | 2011-03-09 | 2016-03-24 | Mitsui Chemicals, Inc. | Pentamethylenediisocyanate, method for producing pentamethylenediisocyanate, polyisocyanate composition, polyurethane resin, and polyurea resin |
| EP3271432A1 (de) | 2015-03-16 | 2018-01-24 | Covestro Deutschland AG | Polyisocyanatzusammensetzung auf basis von 1,5-pentamethylendiisocyanat |
| WO2016169810A1 (de) | 2015-04-20 | 2016-10-27 | Basf Se | Zweikomponentige beschichtungsmassen |
| EP3872108A1 (de) | 2020-02-28 | 2021-09-01 | Covestro Intellectual Property GmbH & Co. KG | Uretdiongruppen enthaltende zusammensetzungen |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN120303315A (zh) | 2025-07-11 |
| EP4626943A1 (de) | 2025-10-08 |
| JP2025538306A (ja) | 2025-11-27 |
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