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EP2655507A1 - Matières moulables thermoplastiques à base de copolymères de styrène et de polyamides présentant une meilleure ténacité à basse température - Google Patents

Matières moulables thermoplastiques à base de copolymères de styrène et de polyamides présentant une meilleure ténacité à basse température

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Publication number
EP2655507A1
EP2655507A1 EP11796723.2A EP11796723A EP2655507A1 EP 2655507 A1 EP2655507 A1 EP 2655507A1 EP 11796723 A EP11796723 A EP 11796723A EP 2655507 A1 EP2655507 A1 EP 2655507A1
Authority
EP
European Patent Office
Prior art keywords
component
weight
thermoplastic molding
molding composition
components
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11796723.2A
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German (de)
English (en)
Inventor
Martin Weber
Marko Blinzler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ineos Styrolution Europe GmbH
Original Assignee
BASF SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BASF SE filed Critical BASF SE
Priority to EP11796723.2A priority Critical patent/EP2655507A1/fr
Publication of EP2655507A1 publication Critical patent/EP2655507A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • C08L33/18—Homopolymers or copolymers of nitriles
    • C08L33/20—Homopolymers or copolymers of acrylonitrile
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
    • C08L25/02—Homopolymers or copolymers of hydrocarbons
    • C08L25/04—Homopolymers or copolymers of styrene
    • C08L25/08—Copolymers of styrene
    • C08L25/12—Copolymers of styrene with unsaturated nitriles
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
    • C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/15—Heterocyclic compounds having oxygen in the ring
    • C08K5/151—Heterocyclic compounds having oxygen in the ring having one oxygen atom in the ring
    • C08K5/1535—Five-membered rings
    • C08K5/1539—Cyclic anhydrides
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
    • C08L25/02—Homopolymers or copolymers of hydrocarbons
    • C08L25/04—Homopolymers or copolymers of styrene
    • C08L25/08—Copolymers of styrene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L51/06—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L55/00—Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L23/00 - C08L53/00
    • C08L55/02—ABS [Acrylonitrile-Butadiene-Styrene] polymers

Definitions

  • the present invention relates to thermoplastic molding compositions containing styrene copolymer, polyamide, graft rubber, compatibilizer and impact modifier, processes for their preparation, thermoplastic molding compositions obtainable by these processes, the use of these thermoplastic molding compositions and moldings, fibers and films containing them contain thermoplastic molding compositions.
  • Blends Polymer mixtures ("blends") of (methyl) styrene-acrylonitrile copolymers and polyamides are known per se.Binary blends of these polymer components have very poor toughness due to the incompatibility between polyamide and, for example, styrene-acrylonitrile copolymer the toughness of the blends, but also their chemical resistance, can be significantly improved, as described, for example, in EP-A 202 214, EP-A 402 528 and EP-A 784 080.
  • Methyl) styrene-acrylonitrile copolymers and polyamides are described as basically arbitrary in the cited documents, as a rule all components are fed together to a mixing device, ie melt-mixed with one another in a single process step at the same time.
  • Suitable compatibilizers are, in particular, styrene-acrylonitrile-maleic anhydride terpolymers, styrene-N-phenylmaleimide-maleic anhydride terpolymers and
  • Methyl methacrylate-maleic anhydride copolymers It is assumed that the amino or carboxyl end groups of the polyamides react with the functional groups of said copolymers and terpolymers, forming in situ copolymers which produce the compatibility between the styrene copolymer phase and the polyamide phase.
  • the low-temperature toughness of the products is not sufficient, so for additional toughening additional rubbers are used.
  • rubbers are used, which accumulate due to their functionalization in the polyamide phase.
  • suitable rubbers are usually polyethylene copolymers with ⁇ -olefins as comonomer, which are also functionalized with carboxylic acid derivatives such as maleic anhydride or acrylic acid. Details on the impact modification of thermoplastics can be found, for example, in. For example, RJ Gaymans in "Polymer Blends, Vol. II: Performance” (John Wiley & Sons, New York, 2000) A description of suitable polyethylene copolymers is found, for example, in EP-A 1 711 560. For use in highly stressed parts, especially in automotive applications, there is therefore a need for molding compositions with improved low-temperature toughness.
  • thermoplastic molding compositions were found which as
  • Components contain: a) 3 to 91, 9 wt .-% of one or more styrene copolymers as component A, b) 3 to 91 wt .-% of one or more polyamides as component B,
  • component D from 0.1 to 25% by weight of one or more compatibilizers as component D and e) from 2 to 30% by weight of ethylene-1-octene copolymer with functional groups as component E,
  • the invention also relates to processes for their preparation, thermoplastic molding compositions which are obtainable (or prepared) by these processes, the use of these thermoplastic molding compositions and moldings, fibers and films containing these thermoplastic molding compositions.
  • thermoplastic molding compositions contain:
  • component D from 0.1 to 25% by weight of one or more compatibilizers as component D, e) from 2 to 30% by weight of ethylene-1-octene copolymer having functional groups as component E,
  • component G 0 to 50% by weight of fibrous or particulate filler or mixtures thereof as component G,
  • wt .-% are each based on the total weight of components A to H and together give 100 wt .-%.
  • thermoplastic molding compositions comprise:
  • component D 1 to 20% by weight of one or more compatibilizers as component D, e) from 3 to 25% by weight of ethylene-1-octene copolymer having functional groups, component E, f) from 0 to 3% by weight of low molecular weight anhydrides as component F,
  • component G 0 to 20% by weight of fibrous or particulate filler or mixtures thereof as component G,
  • wt .-% are each based on the total weight of components A to H and together give 100 wt .-%.
  • thermoplastic molding compositions contain:
  • component F 2 to 10 wt .-% of one or more compatibilizer as component D, e) 4 to 20 wt .-% ethylene-1-octene copolymer having functional groups, component E, f) 0 to 3 wt .-% low molecular weight Anhydrides as component F,
  • component G 0 to 20% by weight of fibrous or particulate filler or mixtures thereof as component G,
  • wt .-% are each based on the total weight of components A to H and together give 100 wt .-%.
  • thermoplastic molding compositions contain a component F in an amount of 0.03 to 2 wt .-%, based on the total weight of the components A to H.
  • thermoplastic molding compositions contain a component H, z. B. in amounts of 0.2 to 10 wt.%, In particular 0.4 to 10 wt .-%, based on the total weight of components A to H.
  • thermoplastic molding compositions of the invention 3 to 91, 9 wt .-%, in particular 10 to 60 wt .-%, preferably 12 to 50 wt .-% of at least one styrene copolymer A, said styrene copolymer A preferably from two or a plurality of monomers from the group consisting of styrene, acrylonitrile, ⁇ -methylstyrene and methyl methacrylate.
  • styrene copolymers in particular SAN or other rubber-free
  • Styrene copolymers are understood.
  • component A is common copolymer matrices such.
  • a molding composition which contains one or more styrene copolymers A, this styrene copolymer A being composed of two or three monomers from the group consisting of styrene, acrylonitrile and / or ⁇ -methylstyrene.
  • the copolymer matrix A is preferably prepared from the components acrylonitrile and styrene and / or ⁇ -methylstyrene by bulk polymerization or in the presence of one or more solvents.
  • copolymers A having molecular weights Mw of 15,000 to 300,000 g / mol, wherein the molecular weights z. B. by light scattering in tetrahydrofuran can be determined (GPC with UV detection).
  • the copolymer matrix A can, for. For example:
  • (Ab) Poly-a-methylstyrene-acrylonitrile, prepared from, based on (Ab), 60 to 85 wt .-% a-methyl styrene and 15 to 40 wt .-% of acrylonitrile, or
  • the copolymer matrix A can also be obtained by copolymerization of acrylonitrile, styrene and ⁇ -methylstyrene.
  • the number average molecular weight (Mn) of the copolymer matrix A is preferably from 15,000 to 150,000 g / mol (determined by GPC with UV detection).
  • the viscosity (VZ) of the copolymeric matrix A is (measured according to DIN 53726 at 25 ° C in a 0.5 wt .-% solution in DMF) z. From 50 to 120 ml / g.
  • the copolymer matrix A can be prepared by a method, as for example in the Plastics Handbook (Vieweg-Daumiller, Volume V, (polystyrene), Carl Hanser Verlag, Kunststoff 1969, pages 122 f., Lines 12th ff.) is described.
  • the molding composition of the invention further contains 3 to 91 wt .-%, preferably from 30 to 80 wt .-%, in particular from 30 to 60 wt.%, Of one or more polyamides B, which may be homopolyamides, copolyamides or mixtures thereof ,
  • the polyamides of the molding compositions according to the invention generally have a viscosity number of 70 to 350, preferably 70 to 170 ml / g, determined in a 0.5 wt .-% solution in 96 wt .-% sulfuric acid at 25 ° C according to ISO 307th
  • Semicrystalline or amorphous resins having a weight average molecular weight of at least 5,000 are preferred.
  • Examples include polyamides derived from lactams having 7 to 13 ring members, such as polycaprolactam, polycapryllactam and polylaurolactam and polyamides obtained by reacting dicarboxylic acids with diamines.
  • alkanedicarboxylic acids having 6 to 12, in particular 6 to 10 carbon atoms and aromatic dicarboxylic acids can be used.
  • adipic acid, azelaic acid, sebacic acid, dodecanedioic acid and terephthalic and / or isophthalic acid may be mentioned as acids.
  • Suitable diamines are, in particular, alkanediamines having 6 to 12, in particular 6 to
  • Preferred polyamides are polyhexamethylene adipamide, polyhexamethylene sebacamide and polycaprolactam and also copolyamides 6/66, in particular with a content of 5 to 95% by weight of caprolactam units.
  • component B polyamides are obtainable from ⁇ -aminoalkylnitriles such as aminocapronitrile (PA 6) and adiponitrile with hexamethylenediamine (PA 66) by so-called.
  • ⁇ -aminoalkylnitriles such as aminocapronitrile (PA 6) and adiponitrile with hexamethylenediamine (PA 66) by so-called.
  • polyamides which are e.g. are obtainable by condensation of 1, 4-diaminobutane with adipic acid at elevated temperature (polyamide 4.6). Manufacturing processes for polyamides of this structure are known e.g. in EP-A 38 094, EP-A 38 582 and EP-A 39 524 described.
  • polyamides which are obtainable by copolymerization of two or more of the abovementioned monomers or mixtures of a plurality of polyamides are suitable, the mixing ratio being arbitrary.
  • the triamine content is less than 0.5, preferably less than 0.3 wt .-% (see EP-A 299 444).
  • PA 46 tetramethylenediamine, adipic acid
  • PA 66 hexamethylenediamine, adipic acid
  • PA 610 hexamethylenediamine, sebacic acid
  • PA 612 hexamethylenediamine, decanedicarboxylic acid
  • PA 613 hexamethylenediamine, undecanedicarboxylic acid
  • PA 1212 1, 12-dodecanediamine, decanedicarboxylic acid
  • PA 1313 1, 13-diaminotridecane, undecanedicarboxylic acid
  • PA 6T hexamethylenediamine, terephthalic acid
  • PA MXD6 m-xylylenediamine, adipic acid
  • PA 6I hexamethylenediamine, isophthalic acid
  • PA 6-3-T trimethylhexamethylenediamine, terephthalic acid
  • PA 6 / 6T (see PA 6 and PA 6T)
  • PA 6/66 (see PA 6 and PA 66)
  • PA 6/12 see PA 6 and PA 12
  • PA 66/6/610 see PA 66, PA 6 and PA 610)
  • PA 6I / 6T see PA 61 and PA 6T
  • PA PA PACM 12 diaminodicyclohexylmethane, laurolactam
  • PA 6I / 6T / PACM such as PA 6I / 6T + diaminodicyclohexylmethane
  • PA 12 / MACMI laurolactam dimethyldiaminodicyclohexylmethane
  • PA 12 / MACMT laurolactam dimethyldiaminodicyclohexylmethane
  • TAD triacetonediamine
  • the molding composition according to the invention also contains 3 to 50 wt .-%, preferably 10 to 40
  • Graft rubbers in the context of the invention are understood to mean core-shell rubbers which may also have a multi-shell structure. Preference is given to graft rubbers which as core have a component with a Tg of less than (-20) ° C, preferably less than (-40) ° C. Suitable rubbers based on diene, acrylate, siloxane and EPDM.
  • the graft shell is preferably styrene and acrylonitrile and / or others
  • the ratio of hard to soft phase is between 10 to 90 and 70 to 30 parts by weight. During the polymerization of the hard phase, minor amounts of ungrafted fractions are also formed. These are attributed to the hard phase.
  • the mixing ratio of the two different rubbers should be 10 to 90 to 90 to 10.
  • the rubbers used differ with respect to their soft phase content by at least 5 wt .-%.
  • This graft polymer C is preferably composed of a graft base and at least one graft.
  • the graft polymer C is z. B. from two or more monomers from the group butadiene, styrene, acrylonitrile, ⁇ -methylstyrene, methyl methacrylate, ethyl acrylate and / or methylacrylamide.
  • the molding composition preferably contains from 10 to 40% by weight of one or more graft polymers C, this graft polymer C being composed of a grafting base of polybutadiene (or, for example, a butadiene-containing copolymer) and at least one grafting layer.
  • the graft pad is preferably made of two or more monomers from the group consisting of styrene, acrylonitrile, ⁇ -methylstyrene, ethyl acrylate and / or methylacrylamide.
  • Suitable rubbers C in the context of the present invention are in particular those which
  • a diene based diene rubber such as butadiene or isoprene,
  • alkyl acrylate rubber based on alkyl esters of acrylic acid, such as n-butyl acrylate and 2-ethylhexyl acrylate,
  • Particularly preferred rubber C is a graft polymer comprising a graft base, in particular a crosslinked diene or alkyl acrylate graft base, and one or more graft shells, in particular one or more styrene, acrylonitrile or methyl methacrylate graft shells.
  • component D molding compositions of the invention contain from 0.1 to 25 wt .-% of at least one terpolymer based on styrene, acrylonitrile and maleic anhydride and thermoplastic see polymers with polar groups.
  • polymers are used which contain:
  • C.1 is a vinylaromatic monomer
  • vinylaromatic monomers C.1 styrene is particularly preferred.
  • component C.2 acrylonitrile is particularly preferred.
  • Dicarboxylic anhydrides and for C.3 is particularly preferably maleic anhydride.
  • Preference is given to using terpolymers of the stated monomers as component C.1, C.2 and C.3. Accordingly, terpolymers of styrene, acrylonitrile and
  • maleic anhydride used These terpolymers contribute in particular to the improvement of mechanical properties, such as tensile strength and impact resistance.
  • the amount of maleic anhydride in the terpolymer can vary within wide limits and is generally from 0.2 to 4 wt .-% mol%, preferably 0.4 to 3 wt .-%, particularly preferably 0.8 and
  • the terpolymer can be prepared in a manner known per se.
  • a suitable method is to dissolve monomeric components of the terpolymer, e.g. Example of styrene, maleic anhydride or acrylonitrile in a suitable solvent, for. For example, methyl ethyl ketone (MEK).
  • MEK methyl ethyl ketone
  • one or optionally several chemical initiators are added. Suitable initiators are, for. B. peroxides.
  • the mixture is then polymerized for several hours at elevated temperature. Subsequently, the solvent and the unreacted monomers are removed in a conventional manner.
  • the ratio between the component C.1 (vinylaromatic monomer) and the component C.2, z. B. the acrylonitrile monomer in the terpolymer is preferably between 80: 20 and 50: 50th To the miscibility of
  • an amount of vinyl aromatic monomer C.1 is preferably selected which corresponds to the amount of the vinyl monomer in the
  • Styrene copolymer A corresponds.
  • the amount of component D in the polymer blends of the invention is between 0.1 and 25 wt .-%, preferably between 1 and 20 wt .-%, particularly preferably between 2 and 10 wt .-%. Most preferred are amounts between 3 and 7 wt .-%.
  • the copolymers of component D generally have molecular weights M w in the range of from 30,000 to 500,000 g / mol, preferably from 50,000 to 250,000 g / mol, in particular from 70,000 to 200,000 g / mol, determined by GPC using tetrahydrofuran (THF) as the eluent and with polystyrene calibration.
  • M w molecular weights in the range of from 30,000 to 500,000 g / mol, preferably from 50,000 to 250,000 g / mol, in particular from 70,000 to 200,000 g / mol, determined by GPC using tetrahydrofuran (THF) as the eluent and with polystyrene calibration.
  • THF tetrahydrofuran
  • thermoplastic molding compositions according to the invention contain from 2 to 30% by weight, preferably from 3 to 25% by weight, particularly preferably from 4 to 20% by weight of one
  • Impact modifiers based on ethylene-a-olefin copolymers which were subsequently functionalized.
  • Copolymers of from 50 to 70% by weight of ethylene and from 30 to 50% by weight of 1-octene are preferably used which contain from 0.1 to 3% by weight of ethylenically unsaturated mono- or dicarboxylic acid or its anhydrides or a functional derivative of such an acid are functionalized.
  • ethylenically unsaturated mono or the dicarboxylic acid are generally d- to C 2 o monocarboxylic acids or C 2 - to C 2 o-dicarboxylic acids or their anhydrides such as acrylic acid, fumaric acid, maleic acid or mixtures thereof, preferably maleic anhydride or acrylic acid or mixtures thereof ,
  • Particularly preferred as component E) are functionalized ethylene / 1-octene copolymers, more preferably compositions of:
  • E i3 0.1 to 3 wt .-%, preferably 0.2 to 2 wt .-% of an ethylenically unsaturated mono- or dicarboxylic acid or a functional derivative of such an acid.
  • the molecular weight of these functionalized ethylene- ⁇ -olefin copolymers is between 10,000 and 500,000 g / mol, preferably between 15,000 and 400,000 g / mol (Mn, determined by GPC in 1, 2,4-trichlorobenzene with PS calibration ).
  • the melt index of the ethylene copolymers is in the range of 0.4 to 0.9 g / 10 min (measured at 190 ° C and 2.16 kg load).
  • the preparation of the ethylene- ⁇ -olefin copolymers can-as described in US Pat. No. 5,272,236-be carried out by so-called "single-site catalysts.”
  • the ethylene- ⁇ -olefin copolymers have a molecular weight distribution smaller than 4, which is narrow for polyolefins.
  • the grafting of vinyl compounds onto polyolefins is described, for example, in "Plyolefin Blends" (D.Nwabunma, T. Kyu (ed.), pp. 269-304, Wiley-Interscience, Hoboken 2007).
  • the molding compositions of the invention may comprise at least one dicarboxylic acid anhydride, which is to be understood as meaning a low molecular weight compound which has only one dicarboxylic acid anhydride group.
  • Dicarboxylic acid anhydrides according to the present invention are monofunctional, that is, they react with the polyamide chains of component B, in particular with the amino function of the corresponding compounds.
  • the molecular weight of this compound is generally less than 3000 g / mol, preferably less than 1500 g / mol.
  • Suitable compounds F) are e.g. C 4 -C 10 -alkyldicarboxylic acid anhydrides, for example succinic anhydride,
  • Glutaric anhydride adipic anhydride.
  • cycloaliphatic dicarboxylic anhydrides such as 1, 2-cyclohexanedicarboxylic anhydride.
  • dicarboxylic acid anhydrides which are ethylenically unsaturated or aromatic compounds, for example maleic anhydride, phthalic anhydride or trimellitic anhydride. Preference is given to the use of phthalic anhydride.
  • the proportion of component F is generally from 0 to 3 wt .-% and if component F is contained in the thermoplastic molding compositions of the invention, preferably from 0.03 to 2 wt .-%, based on the total weight of components A to H.
  • thermoplastic molding compositions according to the invention in an amount of 0 to 50 wt .-%, preferably 0 to 20 wt .-%, often 1 to 20 wt .-%, in particular 10 to 17.5 wt .-% filler or reinforcing materials.
  • Suitable particulate mineral fillers G are amorphous silicic acid, carbonates such as magnesium carbonate (chalk), powdered quartz, mica, various silicates such as clays, muscovite, biotite, suzoite, tin malite, talc, chlorite, phlogophite, feldspar, calcium silicates such as wollastonite, or kaolin. especially calcined kaolin.
  • particulate fillers are used, of which at least 95 wt .-%, preferably at least 98 wt .-% of the particles has a diameter (largest dimension), determined on the finished product, of less than 45 ⁇ , preferably less than 40 ⁇ and whose so-called aspect ratio is preferably in the range of 1 to 25, preferably in the range of 2 to 25, determined on the finished product, ie usually an injection molded part.
  • the particle diameters may be e.g. be determined by electron micrographs taken of thin sections of the polymer mixture and at least 25, preferably at least 50 filler particles are used for the evaluation. Likewise, the determination of the particle diameter can be made by sedimentation analysis, according to Transactions of ASAE, page 491 (1983). The proportion by weight of the fillers, which is less than 40 ⁇ , can also be measured by sieve analysis. The aspect ratio is the ratio of particle diameter to thickness (largest expansion to smallest expansion).
  • Particularly preferred particulate fillers are talc, kaolin, such as calcined kaolin or wollastonite, or mixtures of two or all of these fillers. These include talc with a proportion of at least 95% by weight of particles with a diameter of less than 40 ⁇ m and an aspect ratio of 1.5 to 25, in each case determined on the finished product.
  • fibrous fillers such as carbon fibers, potassium titanate whiskers, aramid fibers or preferably glass fibers are used, wherein at least 50 wt .-% of the fibrous fillers (glass fibers) have a length of more than 50 ⁇ .
  • the (glass) fibers used may preferably have a diameter of up to 25 ⁇ , more preferably 5 to 13 ⁇ .
  • At least 70 wt .-% of the glass fibers have a length of more than 60 ⁇ on. Particular preference is given in the finished part of the average length of the glass fibers 0.08 to 0.5 mm.
  • the length of the glass fibers refers to a finished molded part obtained, for example, after injection molding.
  • the glass fibers can be added to the molding compositions already in the appropriately cut-to-length form or in the form of endless strands (rovings). It is also possible to use mixtures of fillers and reinforcing materials.
  • thermoplastic molding compositions according to the invention in amounts of 0 to 40 wt .-%, preferably 0 to 20 wt .-%, often 0.2 to 10 wt.%, In particular 0 (in the presence of 0.4) to 10 wt .-% are used.
  • processing aids for example, processing aids, stabilizers and
  • Oxidation retardants means against thermal decomposition and decomposition by ultraviolet light, lubricants and mold release agents, flame retardants, dyes and pigments and plasticizers to name.
  • Their proportion is generally 0 to 40 wt .-%, preferably 0 to 20% by weight, in particular 0 (when present 0.2) to 10 wt .-%, based on the total weight of the composition.
  • Pigments and dyes are generally included in amounts of from 0 to 4% by weight, preferably 0 to 3.5% by weight, and more preferably 0 (when present at 0.5) to 3% by weight.
  • the pigments for coloring thermoplastics are generally known, see, for example, R. Gumbleter and H. Müller, Taschenbuch der Kunststoffadditive (Carl Hanser Verlag, 1983, pp 494 to 510).
  • the first preferred group of pigments are white pigments such as zinc oxide, zinc sulfide, lead white (2 PbCO 3 .Pb (OH) 2), lithopone, antimony white and titanium dioxide.
  • white pigments such as zinc oxide, zinc sulfide, lead white (2 PbCO 3 .Pb (OH) 2), lithopone, antimony white and titanium dioxide.
  • rutile and anatase type of titanium dioxide, in particular the rutile form is used for whitening the molding compositions of the invention.
  • Black color pigments which can be used according to the invention are iron oxide black (Fe 3 O 4 ), spinel black (Cu (Cr, Fe) 2 O 4 ), manganese black (mixture of manganese dioxide, silicon oxide and iron oxide), cobalt black and antimony black, and particularly preferably carbon black, which is usually used in the form of furnace or gas black (see G. Benzing, Pigments for paints, Expert-Verlag (1988), p. 78ff).
  • inorganic colored pigments such as chromium oxide green or organic colored pigments such as azo pigments and phthalocyanines according to the invention to adjust certain hues.
  • pigments are generally commercially available.
  • Oxidation retardants and heat stabilizers which can be added to the thermoplastic compositions according to the invention are, for example, halides of metals of group I of the Periodic Table, for example sodium, lithium halides, optionally in combination with copper (I) halides, eg chlorides, Bromides and iodides.
  • the halides, especially the copper can also still contain electron-rich n-ligands.
  • copper complexes may be mentioned Cu-halide complexes with, for example, triphenylphosphine.
  • zinc fluoride and zinc chloride can be used.
  • sterically hindered phenols hydroquinones, substituted members of this group, secondary aromatic amines, optionally in combination with phosphorus-containing acids or their salts, and mixtures of these compounds, preferably in concentrations up to 1 wt .-%, based on the weight of the mixture , usable.
  • UV stabilizers are various substituted resorcinols, salicylates,
  • Benzotriazoles and benzophenones which are generally available in quantities of up to 2% by weight.
  • Lubricants and mold release agents which are usually added in amounts of up to 1% by weight of the thermoplastic composition, are stearic acid, stearyl alcohol, stearic acid alkyl esters and amides, and also esters of pentaerythritol with long-chain fatty acids. Also salts of calcium, zinc or aluminum of stearic acid and dialkyl ketones, e.g. Distearyl ketone, are used. Furthermore, ethylene oxide-propylene oxide copolymers can also be used as lubricants and mold release agents.
  • the preparation of the thermoplastic molding compositions according to the invention is carried out according to methods known per se by mixing the components. It may be advantageous to premix individual components.
  • Suitable organic solvents are, for example, chlorobenzene, mixtures of chlorobenzene and methylene chloride or mixtures of chlorobenzene and aromatic hydrocarbons, such as toluene. Preference is given to working without chlorine-containing solvents.
  • the evaporation of the solvent mixtures can be carried out, for example, in evaporation extruders.
  • the mixing of, for example, dry components A to E and optionally F to H can be carried out by all known methods.
  • the mixing is carried out at temperatures of 200 to 320 ° C by coextrusion, kneading or rolling of the components, wherein the components have optionally been previously isolated from the solution obtained in the polymerization or from the aqueous dispersion.
  • thermoplastic molding compositions according to the invention can be processed by the known processes of thermoplastic processing, for example by extrusion, injection molding, calendering, blow molding or sintering.
  • the molding compositions of the invention can be used for the production of films, fibers and moldings. In addition, they can be used particularly preferably for the production of body parts in the automotive sector, in particular for the production of large-scale automotive exterior parts. Even in the interior of automobiles molding compositions of the invention can be used.
  • the invention also relates to corresponding moldings, fibers or films and body parts of motor vehicles.
  • the viscosity numbers VZ of the (methyl) styrene-acrylonitrile copolymers and compatibilizers were determined according to DIN 53726 on 0.5% strength by weight dimethylformamide solution at 25.degree.
  • the viscosity numbers VZ of the polyamides were determined according to ISO 307 at 0.5% strength by weight solution in concentrated sulfuric acid (96% by weight H 2 SO 4) at 25 ° C.
  • the average particle sizes of the graft copolymers used as rubbers were determined as weight average particle sizes by means of an analytical ultracentrifuge according to the method of W. Scholtan and H. Lange (Kolloid-Z, and Z.-Polymers 250 (1972), pages 782 to 796).
  • the heat resistance Vicat B of the thermoplastic molding compositions was determined by means of the Vicat softening temperature.
  • the Vicat softening temperature was determined according to DIN 53 460, with a force of 49.05 N and a temperature increase of 50 K per hour on ISO rods.
  • the notched impact strength a k of the thermoplastic molding compositions at room temperature (RT) and -30 ° C was determined on ISO rods according to ISO 179 1 eA.
  • melt flow rate MVR Melt Volume Rate
  • polyamide B1 was a polyamide 6, obtained from ⁇ -caprolactam, with a viscosity number of 150 ml / g (measured at 0.5 wt .-% - ig strength in 96% sulfuric acid) is used, for example Ultramid ® B 27E.
  • Component C2 Component C2
  • styrene-acrylonitrile-maleic anhydride terpolymer As component D3, a styrene-acrylonitrile-maleic anhydride terpolymer was used which had a composition of 74.4 / 23.5 / 2.1 (wt%), viscosity number: 66 ml / g
  • component F phthalic anhydride was used.
  • Ciba As component H Irganox® PS 802 (di-stearyl-dithiopropionate), Fa. Ciba was used.
  • the components were mixed in a twin-screw extruder at a melt temperature of 240 to 260 ° C. The melt was passed through a water bath and granulated. The results of the tests are shown in Table 1.
  • Components A, B, C, D, E also contain a component F and / or a component H.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L'invention concerne des matières moulables thermoplastiques qui contiennent a) entre 3 et 91,9 % en poids d'un ou de plusieurs copolymères de styrène comme composant A, b) entre 3 et 91 % en poids d'un ou de plusieurs polyamides comme composant B, c) entre 3 et 50 % en poids d'un ou de plusieurs caoutchoucs greffés comme composant C, c) entre 0,1 et 25 % en poids d'un ou de plusieurs agents de compatibilité comme composant D et e) entre 2 et 30 % en poids de copolymère éthylène-1-octène ayant des groupes fonctionnels comme composant E. Ces matières moulables thermoplastiques présentent une meilleure ténacité à basse température.
EP11796723.2A 2010-12-20 2011-12-19 Matières moulables thermoplastiques à base de copolymères de styrène et de polyamides présentant une meilleure ténacité à basse température Withdrawn EP2655507A1 (fr)

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PCT/EP2011/073194 WO2012084785A1 (fr) 2010-12-20 2011-12-19 Matières moulables thermoplastiques à base de copolymères de styrène et de polyamides présentant une meilleure ténacité à basse température
EP11796723.2A EP2655507A1 (fr) 2010-12-20 2011-12-19 Matières moulables thermoplastiques à base de copolymères de styrène et de polyamides présentant une meilleure ténacité à basse température

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CN117050458B (zh) * 2023-08-29 2024-01-30 苏州创扬新材料科技股份有限公司 一种低永久压缩形变热塑性弹性体及其制备方法

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