Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F279/00—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00
  • C08F279/02—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00 on to polymers of conjugated dienes
  • C08F279/04—Vinyl aromatic monomers and nitriles as the only monomers
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J3/00—Processes of treating or compounding macromolecular substances
  • C08J3/20—Compounding polymers with additives, e.g. colouring
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
  • C08L69/005—Polyester-carbonates
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2207/00—Properties characterising the ingredient of the composition
  • C08L2207/53—Core-shell polymer
• • 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
  • C08L51/04—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 rubbers
• • 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 invention relates to impact-modified polycarbonate compositions which are distinguished by high heat resistance and good melt flowability.
• compositions of the invention in the
• a further subject of the invention are therefore also the metallized shaped bodies produced from the compositions according to the invention.
• the invention relates to metallized by mirroring and thus acting as a reflector housing for automotive headlamps and automotive taillights, which are made of polycarbonate compositions according to the invention, have sufficient heat resistance and mechanical strength for the application and with a lamp cover consisting of a transparent polycarbonate or Polymethylmethacrylat- Weld composition.
• JP-A 2005119239 discloses a method of laser welding automobile light parts from thermoplastic resins, wherein the first component is transparent and the second component is opaque.
• polycarbonate is disclosed as being transparent and ABS as the opaque component.
• DE-A 4404604 discloses reflectors, in particular for automotive headlamps, consisting of a rigid shell of a thermosetting material coated with a metallized film of a thermoplastic, wherein the thermoplastic is for example a polycarbonate or an ABS.
• JP-A-3880142 discloses pearlescent and high reflectance polycarbonate compositions containing from 35 to 65% by weight of aromatic polycarbonate having a viscosity average molecular weight of from 16,000 to 26,000, and methyl methacrylate polymer and acrylic elastomer in a weight ratio of from 95: 5 to 60:40; the use of such compositions for the production of lamp reflectors.
• JP-A 2002124109 discloses housing materials for automotive lamps which are vapor-deposited with a reflector layer of aluminum containing 10 to 90% by weight of polycarbonate and 10 to 90% by weight of rubber-modified styrene resin, the materials having a rubber content of 1 to 7% by weight. % exhibit.
• the rubber-modified styrenic resin used in the disclosed examples is an ABS consisting of 50 parts by weight of butadiene, 15 parts by weight of acrylonitrile and 35 parts by weight of styrene having a particle size of the rubber base of 350 nm.
• JP-A 10287802 discloses polycarbonate compositions and their use as housing material for automotive lamps having good heat distortion resistance, solvent resistance, weathering resistance, weldability and metallizability containing 30 to 65 parts by weight of aromatic polycarbonate, 5 to 40 parts by weight of graft polymers prepared by grafting aromatic ones Vinyl monomers and vinyl cyanides on acrylic acid ester-containing rubbers and 20 to 50 parts by weight of copolymers of vinyl monomers and vinyl cyanides.
• EP-A 704 488 discloses polycarbonate compositions having improved low toughness containing 15 to 80 parts by weight thermoplastic polycarbonate, 4 to 40 parts by weight graft polymer based on rubber particles and 16 to 45 parts by weight thermoplastic vinyl aromatic (co) polymer , wherein the graft base has an average particle size (d50) of 200 to 350 nm and graft polymer and vinyl aromatic (co) polymer in a weight ratio between 2: 1 and 1: 4 are used.
• EP-A 606 558 discloses polycarbonate compositions having improved melt flowability and flexural modulus of elasticity containing 55 to 90% by weight of aromatic polycarbonate, 10 to 30% by weight of a grafted polymer based on a particulate diene rubber base and 0 to 15% by weight % of a vinyl aromatic copolymer, wherein the diene rubber base has a narrow, monodisperse particle size distribution, characterized in that more than 50% by weight of the particles have a diameter between 200 and 300 nm and more than 70% by weight of the particles have a diameter between 200 and 400 nm.
• the object of the invention is to provide polycarbonate compositions with high heat resistance and good melt flowability for the production of moldings by injection molding, which after metallization have a surface with a high and homogeneous degree of gloss.
• Wt .-% based on the sum of B.1.1 and B.1.2, one or more particulate rubbers as graft bases having glass transition temperatures ⁇ 0 0 C, preferably ⁇ -10 0 C, particularly preferably ⁇ -20 0 C, B.2 ) optionally a rubber-free vinyl (co) polymer, B.3) optionally a graft polymer of at least one vinyl monomer onto at least a base rubber having a glass transition temperature ⁇ 0 0 C, preferably ⁇ -20 0 C, produced in the bulk, solution or mass Suspension polymerization process, wherein the graft polymers Bl and B.3 production reasons in addition to graft optionally also free, that is not chemically bound to the rubber particles C) 0 to 25 parts by weight, preferably 0 to 10 parts by weight, more preferably from 0.1 to 5, and / or in organic solvents insoluble form in the graft particles enclosed (co) polymer of vinyl monomers can contain
• Parts by weight (based on the sum of parts by weight of components A, B and C) of polymer additives, characterized in that
• the rubber content of the polycarbonate composition is 1 to 6% by weight, preferably 2.0 to 5.5
• Wt .-% particularly preferably 2.5 to 5.0 wt .-%, and
• Wt .-% of the grafting particles in the component B has a diameter (measured with
• Ultracentrifuge of over 400 nm, wherein the sum of the components A + B + C is normalized to 100 parts by weight, to achieve the object of the invention.
• graft particles are understood as meaning the portions of components B.1 and B.3 which are not soluble in suitable solvents, such as, for example, acetone or toluene. These each comprise the rubber base with vinyl (co) polymer chemically bonded to the rubber by graft polymerization as a shell and optionally with vinyl (co) polymer irreversibly entrapped in the rubber base.
• the polycarbonate compositions according to the invention have a melt viscosity measured according to ISO 11443 at a temperature of 260 0 C and the shear rate of 1000s 1 of not more than 240 Pas, preferably not more than 230 Pas, more preferably not more than 200 Pas. This has further advantageous effects because the moldings produced by injection molding of these compositions according to the invention have a high and in particular a particularly homogeneous surface gloss.
• Aromatic polycarbonates according to component A which are suitable according to the invention are known from the literature or can be prepared by processes known from the literature (for example, see Schnell, “Chemistry and Physics of Polycarbonates", Intersers Publishers, 1964 and DE-AS 1 495 626, DE-A 2 for the preparation of aromatic polycarbonates 232 877, DE-A 2 703 376, DE A 2 714 544, DE-A 3 000 610, DE-A 3 832 396; for the preparation of aromatic polyester carbonates, for. B. DE-A 3 077 934).
• Diphenols for the preparation of the aromatic polycarbonates and / or aromatic polyester carbonates are preferably those of the formula (I)
• A being a single bond, C 1 to C 5 -alkylene, C 2 to C 5 -alkylidene, C 5 to C 6 -cycloalkylidene, -O-, -SO-, -CO-, -S-, -SO 2 -, C 6 to C ] 2 -aryl, to which further aromatic rings containing optionally heteroatoms may be condensed, or a radical of the formula (II) or (III)
• B are each C to C alkyl, preferably methyl, halogen, preferably chlorine and / or
• Each bromine x is independently 0, 1 or 2
• p is 1 or 0, and R 5 and R 6 are individually selectable for each X 1 independently of one another hydrogen or C to C -
• Alkyl preferably hydrogen, methyl or ethyl, X 1 carbon and m is an integer from 4 to 7, preferably 4 or 5, with the proviso that at least one atom X 1 , R 5 and R 6 are simultaneously alkyl.
• Preferred diphenols are hydroquinone, resorcinol, dihydroxydiphenols, bis (hydroxyphenyl) -C -alkanes, bis (hydroxyphenyl) -C-C 6 -cycloalkanes, bis (hydroxyphenyl) ethers, bis (hydroxyphenyl) - sulfoxides, bis (hydroxyphenyl) ketones, bis (hydroxyphenyl) -sulfones and ⁇ , ⁇ -bis (hydroxyphenyl) -diisopropyl-benzenes and their nuclear-brominated and / or nuclear-chlorinated derivatives.
• diphenols are 4,4'-dihydroxydiphenyl, bisphenol A, 2,4-bis (4-hydroxyphenyl) -2-methylbutane, 1, 1-bis (4-hydroxyphenyl) cyclohexane, 1, 1 - Bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane, 4,4'-dihydroxydiphenylsulfide, 4,4'-dihydroxydiphenylsulfone and their di- and tetrabrominated or chlorinated derivatives such as 2,2-bis (3-chloro-4-) hydroxyphenyl) -propane, 2,2-bis (3,5-dichloro-4-hydroxyphenyl) -propane or 2,2-bis (3,5-dibromo-4-hydroxyphenyl) -propane.
• 2,2-bis (4-hydroxyphenyl) propane bisphenol-A
• bisphenol-A 2,2-bis (4-hydroxyphenyl) propane
• the diphenols can be used individually or as any mixtures.
• the diphenols are known from the literature or obtainable by literature methods.
• Chain terminators suitable for the preparation of the thermoplastic, aromatic polycarbonates are, for example, phenol, p-chlorophenol, p-tert-butylphenol or 2,4,6-tribromophenol, but also long-chain alkylphenols, such as 4- [2- (2,4,4 -Trimethylpentyl)] - phenol, 4- (l, 3-tetramethyl-butyl) -phenol according to DE-A 2,842,005 or monoalkylphenol or dialkylphenols having a total of 8 to 20 carbon atoms in the alkyl substituents such as 3,5-di-tert.
• alkylphenols such as 4- [2- (2,4,4 -Trimethylpentyl)] - phenol, 4- (l, 3-tetramethyl-butyl) -phenol according to DE-A 2,842,005 or monoalkylphenol or dialkylphenols having a total of 8 to 20 carbon atoms in the alkyl substituents such as 3,5-di-
• the amount of chain terminators to be used is generally between 0.5 mol%, and 10 mol%, based on the molar sum of the diphenols used in each case.
• the thermoplastic, aromatic polycarbonates may be branched in a known manner, preferably by the incorporation of 0.05 to 2.0 mol%, based on the sum of the diphenols used, of trifunctional or more than trifunctional compounds, for example those with three and more phenolic groups.
• both homopolycarbonates and copolycarbonates are suitable.
• inventive copolycarbonates according to component A it is also possible to use from 1 to 25% by weight, preferably from 2.5 to 25% by weight, based on the total amount of diphenols to be used, of hydroxyaryloxy endblocked polydiorganosiloxanes. These are known (US 3 419 634) and can be prepared by literature methods. The preparation of polydiorganosiloxane-containing copolycarbonates is described in DE-A 3 334 782.
• Preferred polycarbonates in addition to the bisphenol A homopolycarbonates, are the copolycarbonates of bisphenol A with up to 15 mol%, based on the molar sums of diphenols, of other than preferred or particularly preferred diphenols, in particular 2,2-bis (3,5-bis). dibromo-4-hydroxyphenyl, l) -propane.
• Aromatic dicarboxylic acid dihalides for the preparation of aromatic polyester carbonates are preferably the diacid dichlorides of isophthalic acid, terephthalic acid, diphenyl ether-4,4'-dicarboxylic acid and naphthalene-2,6-dicarboxylic acid.
• a carbonyl halide preferably phosgene, is additionally used as the bifunctional acid derivative.
• Suitable chain terminators for the production of the aromatic polyester in addition to the monophenols already mentioned, nor their Chlorkohlen yarnreester and the acid chlorides of aromatic monocarboxylic acids which may optionally be substituted by Ci to C22 alkyl groups or by halogen atoms, and aliphatic C 2 to C 22 monocarboxylic acid chlorides consideration.
• the amount of chain terminators is in each case 0.1 to 10 mol%, based on moles of diphenol in the case of the phenolic chain terminators and on moles of dicarboxylic acid dichloride in the case of monocarboxylic acid chloride chain terminators.
• the aromatic polyester carbonates may also contain incorporated aromatic hydroxycarboxylic acids.
• the aromatic polyester carbonates can be branched both linearly and in a known manner (see DE-A 2 940 024 and DE-A 3 007 934).
• branching agents are trifunctional or polyfunctional carboxylic acid chlorides, such as trimesic acid trichloride, cyanuric trichloride, 3,3 ', 4,4'-benzophenone tetracarboxylic acid tetrachloride, 1,4,5,8-naphthalene tetracarboxylic acid tetrachloride or pyromellitic acid tetrachloride, in amounts of 0 , 01 to 1.0 mol% (based on the dicarboxylic acid dichlorides used) or difunctional or polyfunctional phenols, such as phloroglucinol, 4,6-dimethyl-2,4,6-tri- (4-hydroxyphenyl) -hept-2-ene, 4,6-Dimethyl-2,4,6-tris (4-hydroxyphenyl) heptane, 1,3,5-tri (4-hydroxyphenyl) benzene, 1,1,1-tris (4-hydroxyphenyl ) ethane,
• the proportion of carbonate structural units can vary as desired.
• the proportion of carbonate groups is preferably up to 100 mol%, in particular up to 80 mol%, particularly preferably up to 50 mol%, based on the sum of ester groups and carbonate groups.
• Both the ester and the carbonate portion of the aromatic polyester carbonates may be present in the form of blocks or randomly distributed in the polycondensate.
• the relative solution viscosity ( ⁇ re i) of the aromatic polycarbonates and polyester carbonates is in the range from 1.20 to 1.30, preferably from 1.22 to 1.28, particularly preferably from 1.23 to 1.27 (measured on solutions of 0 , 5 g of polycarbonate or polyester carbonate in 100 ml of methylene chloride solution at 25 ° C).
• Component B is in the range from 1.20 to 1.30, preferably from 1.22 to 1.28, particularly preferably from 1.23 to 1.27 (measured on solutions of 0 , 5 g of polycarbonate or polyester carbonate in 100 ml of methylene chloride solution at 25 ° C).
• Component B is a rubber-modified component.
• Component B.1 Component B contains, as component B.l, a graft polymer or a mixture of several graft polymers prepared in emulsion polymerization with particulate rubber as the graft base.
• Component Bl preferably comprises one or more graft polymers of B.1.1 from 5 to 95% by weight, preferably from 20 to 80% by weight, particularly preferably from 25 to 60% by weight (based on the sum of the percent by weight of B .1.1 and B.1.2), at least one vinyl monomer
• B.1.2 95 to 5 wt .-%, preferably 80 to 20 wt .-%, particularly preferably 75 to 40 wt .-% (based on the sum of the wt .-% from B.1.1 and B.1.2) of one or several graft bases with glass transition temperatures ⁇ O 0 C, preferably ⁇ -10 0 C, more preferably ⁇ -20 0 C.
• the graft base B.1.2 preferably has an average particle size (d 5 o value) of 0.05 to 0.25 ⁇ m, preferably from 0.08 to 0.20, particularly preferably from 0.10 to 0.18 ⁇ m.
• Monomers B.1.1 are preferably mixtures of
• Chlorostyrene and methacrylic acid (C r Cg) alkyl esters (such as methyl methacrylate, ethyl methacrylate), and
• B.1.1.2 1 to 50 wt .-%, preferably 20 to 40 wt .-%, particularly preferably 20 to 30 wt .-% (based on the sum of the wt .-% of B.1.1.1 and B. 1.1.2) at least one monomer selected from the group consisting of vinyl cyanides (unsaturated
• Nitriles such as acrylonitrile and methacrylonitrile), (meth) acrylic acid (Ci-Cg) alkyl esters (such as methyl methacrylate, n-butyl acrylate, t-butyl acrylate), unsaturated carboxylic acids and / or derivatives (such as anhydrides and imides) of unsaturated carboxylic acids (for example, maleic anhydride and N-phenyl-maleimide).
• Si-Cg acrylic acid
• alkyl esters such as methyl methacrylate, n-butyl acrylate, t-butyl acrylate
• unsaturated carboxylic acids and / or derivatives such as anhydrides and imides
• Preferred monomers B.1.1.1 are selected from at least one of the monomers styrene, ⁇ -methylstyrene and methyl methacrylate
• preferred monomers B.1.1.2 are selected from at least one of the monomers acrylonitrile, maleic anhydride and methyl methacrylate.
• Particularly preferred monomers are B.1.1.1 styrene and B.1.1.2 acrylonitrile.
• diene rubbers EP (D) M rubbers, ie those based on ethylene / propylene and optionally diene, acrylate, polyurethane, silicone, chloroprene and ethylene / vinyl acetate rubbers, and also graft rubbers B suitable for the graft polymers B. silicone / acrylate composite rubbers.
• Preferred grafting bases B.1.2 are diene rubbers, for example based on butadiene and isoprene, or mixtures of diene rubbers or copolymers of diene rubbers or mixtures thereof with other copolymerizable monomers (for example according to B.1.1.1 and B.1.1.2), with the proviso that that the glass transition temperature of the component B.1.2 is ⁇ 0 0 C, preferably ⁇ -10 0 C, particularly preferably ⁇ -20 0 C. Especially preferred is pure polybutadiene rubber.
• Particularly suitable graft polymers B.l have a core-shell structure.
• the gel fraction of the graft base B.1.2 is preferably at least 60% by weight, particularly preferably at least 80% by weight, in particular at least 90% by weight (measured in toluene).
• Particularly suitable graft polymers B.I are in particular also those polymers which are prepared by redox initiation with an initiator system of organic hydroperoxide and ascorbic acid according to US Pat. No. 4,937,285.
• the grafting monomers are not necessarily completely on the
• Suitable acrylate rubbers according to B.1.2 are preferably polymers of alkyl acrylates, optionally with up to 40 wt .-%, based on B.1.2 other polymerizable, ethylenically unsaturated monomers.
• the preferred polymerisable acrylic esters include C 1 to C 8 alkyl esters, for example methyl, ethyl, butyl, n-octyl and 2-ethylhexyl esters; Haloalkyl esters, preferably halogen-C r C 8 alkyl esters, such as chloroethyl acrylate and mixtures of these monomers.
• crosslinking monomers having more than one polymerizable double bond can be copolymerized.
• Preferred examples of crosslinking monomers are esters of unsaturated monocarboxylic acids having 3 to 8 C atoms and unsaturated monohydric alcohols having 3 to 12 C atoms, or saturated polyols having 2 to 4 OH groups and 2 to 20 C atoms, such as ethylene glycol dimethacrylate, allyl methacrylate ; polyunsaturated heterocyclic compounds such as trivinyl and triallyl cyanurate; polyfunctional vinyl compounds such as di- and trivinylbenzenes; but also triallyl phosphate and diallyl phthalate.
• Preferred crosslinking monomers are allyl methacrylate, ethylene glycol dimethacrylate, diallyl phthalate and heterocyclic compounds having at least three ethylenically unsaturated groups.
• Particularly preferred crosslinking monomers are the cyclic monomers triallyl cyanurate, triallyl isocyanurate, triacryloylhexahydro-s-triazine, triallylbenzenes.
• the amount of crosslinked monomers is preferably 0.02 to 5, more preferably 0.05 to 2 wt .-%, based on the graft B.1.2. In cyclic crosslinking monomers having at least three ethylenically unsaturated groups, it is advantageous to limit the amount to less than 1 wt .-% of the graft B.1.2.
• Preferred "other" polymerizable, ethylenically unsaturated monomers which may optionally be used in addition to the acrylic acid esters for the preparation of the graft B.1.2 are, for example, acrylonitrile, styrene, ⁇ -methylstyrene, acrylamides, V inyl-Ci-C 6 -alky ether, methyl methacrylate, butadiene.
• Preferred acrylate rubbers as the graft base B.1.2 are emulsion polymers which have a gel content of at least 60% by weight.
• graft base B.1.2 is determined at 25 ° C. in a suitable solvent as an insoluble fraction in these solvents (M. Hoffmann, H. Krömer, R. Kuhn, Polymer Analytics I and IL Georg Thieme Verlag, Stuttgart 1977) ,
• the average particle size d 50 is the diameter, above and below which each 50 wt .-% of the particles are. It can be determined by ultracentrifuge measurement (W. Scholtan, H. Lange, Kolloid, Z. and Z. Polymere 250 (1972), 782-1796).
• Component B contains in a preferred embodiment moreover as component B.2 a rubber-free vinyl (co) polymer.
• the rubber-free vinyl (co) polymers according to component B.2 are rubber-free homopolymers and / or copolymers of at least one monomer from the group of vinylaromatics, vinyl cyanides (unsaturated nitriles), (meth) acrylic acid (C 1 to C 8) ) - alkyl esters, unsaturated carboxylic acids and derivatives (such as anhydrides and imides) of unsaturated carboxylic acids.
• B.2.1 50 to 99 wt .-%, preferably 60 to 80 wt .-%, particularly preferably 70 to 80 wt .-% (based on the sum of the wt .-% of B.2.1 and B.2.2) of at least one Monomers selected from the group of vinyl aromatics (such as styrene, ⁇ -methyl styrene), ring-substituted vinyl aromatic (such as p-methyl styrene, p-chlorostyrene) and (meth) acrylic acid (Cj-Cg) alkyl esters (such as Methyl methacrylate, n-
• vinyl aromatics such as styrene, ⁇ -methyl styrene
• ring-substituted vinyl aromatic such as p-methyl styrene, p-chlorostyrene
• Cj-Cg acrylic acid alkyl esters
• B.2.2 1 to 50 wt .-%, preferably 20 to 40 wt .-%, particularly preferably 20 to 30 wt .-% (based on the sum of the wt .-% from B.2.1 and B.2.2) of at least one Monomers selected from the group of vinyl cyanides (such as unsaturated nitriles such as acrylonitrile and methacrylonitrile), (meth) acrylic acid (Ci-C 8 ) alkyl esters (such as
• Methyl methacrylate, n-butyl acrylate, tert-butyl acrylate), unsaturated carboxylic acids and derivatives of unsaturated carboxylic acids for example, maleic anhydride and N-phenylmaleimide.
• the vinyl (co) polymers B.2 are preferably resinous and thermoplastic.
• the copolymer of B.2.1 styrene and B.2.2 acrylonitrile is particularly preferred.
• Such vinyl (co) polymers B.2 are known and can be prepared by free-radical polymerization, in particular by emulsion, suspension, solution or bulk polymerization.
• the vinyl (co) polymers preferably have weight average molecular weights M "(determined by GPC with polystyrene as standard) between 40,000 and 250,000 g / mol, preferably between 60,000 and 170,000 g / mol, particularly preferably between 70,000 and 140,000 g / mol.
• Components B.l and B.2 can also be used as a precompound of the total amount or a subset of B.l with the total amount or a subset of B.2.
• Precompound in the context of the invention are understood as meaning mixtures of graft polymers B1 and rubber-free vinyl (co) polymers B.2 which are in a compounding unit, for example a kneading reactor or twin-screw extruder, by supplying thermal and / or mechanical energy to a temperature of 180.degree heated to 300 0 C, preferably 200 0 C to 280 0 C, particularly preferably 22O 0 C to 260 0 C and thereby melted, mixed and dispersed into each other, optionally degassed by applying a negative pressure and then cooled again and granulated.
• the graft polymer Bl is used in a moist state (ie in the presence of water) according to the processes described in EP 0 768 157 A1 and EP 0 867 463 A1.
• the precompounds suitable for use in component B for the purposes of the invention preferably contain 10 to 70 parts by weight, more preferably 20 to 60 parts by weight, in particular 30 to 55 parts by weight (in each case based on the pre-compound) of graft polymer B1 and preferably 30 to 90 parts by weight, particularly preferably 40 to 80 parts by weight, in particular 45 to 70 parts by weight (in each case based on the pre-compound) of rubber-free vinyl (co) polymer B.2.
• component B may also contain graft polymers B.3 prepared in the bulk, solution or bulk-suspension polymerization process.
• Component B.3 is preferably graft polymers of B.3.1 60 to 95% by weight, preferably 70 to 92% by weight, particularly preferably 80 to 90% by weight (based on the sum of the weight percentages). % from B.3.1 and B.3.1) of a mixture B.3.1.1 65 to 85 wt .-%, preferably 70 to 80 wt .-% (based on the sum of
• B.3.1.1 and B.3.1.2 % By weight of B.3.1.1 and B.3.1.2) of at least one monomer selected from the group of vinylaromatics (such as, for example, styrene, ⁇ -methylstyrene), ring-substituted vinylaromatics (such as, for example, p-methylstyrene, p-chlorostyrene ) and methacrylic acid (C r C 8 ) alkyl esters (such as methyl methacrylate, ethyl methacrylate) and
• vinylaromatics such as, for example, styrene, ⁇ -methylstyrene
• ring-substituted vinylaromatics such as, for example, p-methylstyrene, p-chlorostyrene
• methacrylic acid (C r C 8 ) alkyl esters such as methyl methacrylate, ethyl methacrylate
• B.3.1.2 15 to 35 wt .-%, preferably 20 to 30 wt .-% (based on the sum of wt .-% from B.3.1.1 and B.3.1.2) of at least one monomer selected from Group of vinyl cyanides (such as unsaturated nitriles such as acrylonitrile and methacrylonitrile), (meth) acrylic acid (Ci-C 8 ) alkyl esters (such as methyl methacrylate, n-butyl acrylate, tert-butyl acrylate), unsaturated carboxylic acids and derivatives (such as anhydrides and imides) of unsaturated carboxylic acids (for example, maleic anhydride and N-phenyl-maleimide)
• vinyl cyanides such as unsaturated nitriles such as acrylonitrile and methacrylonitrile
• Si-C 8 acrylic acid
• alkyl esters such as methyl methacrylate, n-butyl acrylate,
• the graft polymers according to component B.3 prepared in bulk, solution or bulk-suspension polymerization preferably have an average particle size (d 50 value) of 0.1 to 10 microns, preferably from 0.2 to 5 microns, more preferably from 0.3 to 2.0 ⁇ m.
• Preferred monomers B.3.1.1 are selected from at least one of the monomers styrene, ⁇ -methylstyrene and methyl methacrylate
• preferred monomers B.3.1.2 are selected from at least one of the monomers acrylonitrile, maleic anhydride and methyl methacrylate.
• Particularly preferred monomers are B.3.1.1 styrene and B.3.1.2 acrylonitrile.
• Examples of preferred graft bases B.3.2 for graft polymers B.3.2 are diene rubbers, diene-vinyl block copolymer rubbers, EP (D) M rubbers, ie those based on ethylene / propylene and optionally diene, and mixtures of several of the abovementioned rubber types.
• Particularly preferred grafting bases B.3.2 are diene rubbers (for example based on butadiene or isoprene), diene-vinyl-block copolymer rubbers (for example based on butadiene and rubbers) Styrene blocks), copolymers of diene rubbers with other copolymerizable monomers (eg according to B.3.1.1 and B.3.1.2) and mixtures of the abovementioned rubber types.
• Particularly preferred graft bases B.3.2 are pure polybutadiene rubber, styrene-butadiene block copolymer rubber and mixtures of pure polybutadiene rubber and styrene-butadiene block copolymer rubber.
• Graft polymers B.3 are generally prepared by free-radically initiated polymerization.
• Particularly preferred graft polymers B.3 are ABS polymers.
• the graft polymer B.3 comprises free, i. non-chemically bound to the rubber base copolymer of B.3.1.1 and B.3.1.2, which is characterized in that it can be dissolved in suitable solvents (such as acetone).
• Component B.3 preferably comprises a free copolymer of B.3.1.1 and B.3.1.2 which has a weight-average molecular weight (Mw), determined by gel permeation chromatography using polystyrene as standard, of from 60,000 to 200,000 g / mol, more preferably from 70,000 to 140,000 g / mol.
• Mw weight-average molecular weight
• (Iii) in a preferred embodiment moreover, up to 25 wt .-%, in particular up to 20 wt .-% of all graft particles in the component B have a diameter, measured with ultracentrifuge, of over 400 nm.
• component B consists of 5 to 50% by weight, particularly preferably 8 to 40% by weight, in particular 15 to 35% by weight. %, based on component B, of component B1, to 50 to 95 wt .-%, particularly preferably 60 to 92 wt .-%, in particular 65 to 85 wt .-%, based on the component B, from component B. 2 and at 0 to 25 wt .-%, particularly preferably 0 to 10 wt .-%, in particular to 0 wt .-%, based on component B, from component B.3.
• the composition may contain as component C polymer additives.
• additives such as flame retardants (for example phosphorus or halogen compounds), flame retardant synergists (for example nanoscale metal oxides), smoke-inhibiting additives (for example boric acid or borates), antidripping agents (for example compounds of the substance classes of fluorinated polyolefins, silicones and aramid fibers) , internal and external lubricants and mold release agents (for example pentaerythritol tetrastearate, montan wax or polyethylene wax), flowability aids (for example low molecular weight vinyl (co) polymers), antistatics (for example block copolymers of ethylene oxide and propylene oxide, other polyethers or polyhydroxyethers, polyetheramides, polyesteramides or sulfonic acid salts), conductivity additives (for example conductive carbon black or carbon nanotubes), stabilizers (for example UV / light stabilizers, heat stabilizers
• conductivity additives for example
• thermoplastic molding compositions according to the invention can be prepared, for example, by mixing the respective components in a known manner and at temperatures of preferably 220 0 C to 3330 0 C, more preferably at 260 to 300 0 C in conventional units such as internal mixers, extruders and twin-screw extruders. pounded and melt extruded.
• the mixing of the individual constituents can be carried out in a known manner both successively and simultaneously, both at about 20 ° C. (room temperature) and at a higher temperature.
• the invention therefore also provides a process for the preparation of the compositions according to the invention.
• the molding compositions of the invention can be used for the production of moldings of any kind. These can be produced, for example, by injection molding, extrusion and blow molding. Another form of processing is the production of moldings by deep drawing from previously prepared plates or films.
• moldings are films, profiles, housing parts of any kind, e.g. for household appliances such as juice presses, coffee machines, blenders; for office machines such as monitors, flat screens, notebooks, printers, copiers; Panels, pipes, electrical installation ducts, windows, doors and other profiles for the building sector (interior and exterior applications) and electrical and electronic parts such as switches, plugs and sockets and components for commercial vehicles, in particular for the automotive sector.
• household appliances such as juice presses, coffee machines, blenders
• office machines such as monitors, flat screens, notebooks, printers, copiers
• Panels, pipes, electrical installation ducts, windows, doors and other profiles for the building sector (interior and exterior applications) and electrical and electronic parts such as switches, plugs and sockets and components for commercial vehicles, in particular for the automotive sector.
• the molding compositions according to the invention are also suitable, for example, for the production of the following moldings: interior fittings for rail vehicles, ships, aircraft, buses and other motor vehicles, body parts for motor vehicles, housings of electrical appliances containing small transformers, housings for information processing and transmission equipment, housings and panels for medical applications Apparatus, massage apparatus and housings therefor, toy vehicles for children, flat wall elements, housings for safety devices, heat-insulated transport containers, moldings for sanitary and bath equipment, grilles for ventilation openings and housings for garden tools.
• the molding compositions according to the invention are suitable for the production of metallized shaped bodies, in a preferred embodiment also shaped bodies with one on the metallised
• Such moldings of the molding compositions according to the invention can be welded to moldings of polycarbonate and / or polymethylmethacrylate.
• the molding compositions according to the invention are thus suitable for the production of luminaire housings with reflector functionality, which are optionally to be welded to a transparent luminaire cover made of polycarbonate or polymethylmethacrylate.
• the molding compositions according to the invention are therefore suitable for the production of autmobilscheinwerfern and automobile tail lights.
• the injection-molded parts are suitable for metallization in a PVD process such as electron beam evaporation or the sputtering process.
• Linear polycarbonate based on bisphenol A with relative solution viscosity (measured on a solution of 0.5 g of the polycarbonate in 100 ml of methylene chloride solution at 25 ° C) of 1.25.
• ABS graft polymer having a core-shell structure prepared in emulsion polymerization with 46% by weight of a shell of styrene-acrylonitrile copolymer with a ratio of styrene to acrylonitrile of 77: 23% by weight to 54% by weight of a particulate graft base, wherein the graft particles, ie the particulate rubber base with its chemically bonded graft shell, have an average particle size d 50 of about 150 nm, and wherein the graft base consists of pure polybutadiene rubber.
• graft particles 55% by weight of the graft particles, measured by means of ultracentrifuge, have a diameter of less than 200 nm and 15% by weight of the graft particles, measured by means of ultracentrifuge, have a diameter greater than 400 nm.
• SAN polymer of 23% by weight of acrylonitrile and 77% by weight of styrene.
• Precompound consisting of 50 wt .-% of component B.l-1 and 50 wt .-% of the component
• Pentaerithritol tetrastearate as a mold release agent
• the composition has an elastomer content of 3.8% by weight.
• a Vicat B 120 value was determined according to ISO 306 of 126 ° C.
• the material showed a tough fracture behavior in the impact test at 23 ° C according to ISO 180/1 A. An impact value of 40 kJ / m 2 was determined.
• Shaped bodies with a partially concave or convex shaped surface which were produced by injection molding from this composition according to the invention, exhibited a high visual value after metallization by means of PVD (Physical Vapor Deposition) Degree of gloss, wherein the homogeneity of the degree of gloss over the molded part was higher than in comparable molded articles, which were formed from compositions according to the prior art.
• PVD Physical Vapor Deposition

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• 2009
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