Classifications

• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
  • C09K21/00—Fireproofing materials
  • C09K21/14—Macromolecular materials
• • 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
  • C08K5/49—Phosphorus-containing compounds
  • C08K5/5399—Phosphorus bound to nitrogen
• • 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
  • C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates

Definitions

• the present invention relates to thermoplastic polycarbonate molding compositions which contain phosphazenes and special graft polymers prepared by means of redox initiator systems and are distinguished by significantly improved mechanical properties.
• DE-A-196 16 968 describes polymerizable phosphazene derivatives, processes for their preparation and their use as curable binders for lacquers, coatings, fillers, fillers, adhesives, moldings or films.
• WO 97/40 092 describes flame-retardant molding compositions made of thermoplastic polymers and unsubstituted phosphazenes of the PN n type. x Hi y described.
• EP-A-728 811 describes a thermoplastic mixture consisting of aromatic polycarbonate, graft copolymer, copolymer and phosphazenes, which have good flame retardant properties, impact resistance and heat resistance.
• the object of the present invention is to provide flame-retardant polycarbonate / ABS molding compositions with very good mechanical properties, such as notched impact strength, stress crack resistance, flame resistance and weld line strength. speed. This range of properties is particularly required for applications in the field of data technology, such as for thin-walled housings for monitors, printers and others.
• PC / ABS molding compositions which contain phosphazenes and a graft polymer prepared by means of a redox initiator system have the desired properties.
• the invention therefore relates to thermoplastic molding compositions
• graft polymers B 0.5 to 60, preferably 1 to 40, in particular 2 to 25 parts by weight of graft polymer, characterized in that the graft polymers B consist of
• B.2 95 to 5, preferably 20 to 70% by weight of one or more particulate diene rubbers with a glass transition temperature ⁇ 10 ° C., preferably ⁇ 0 ° C., particularly preferably ⁇ -20 ° C., which are produced by emulsion polymerization, an initiator system consisting of an organic hydroperoxide and ascorbic acid being used for the graft polymerization,
• thermoplastic polymer selected from the group of thermoplastic vinyl (co) polymers and polyalkylene terephthalates
• R is the same or different and represents amino, in each case optionally halogenated, preferably with fluorine halogenated C, - to C 8 - alkyl, or C, - to Cg-alkoxy, in each case optionally substituted by alkyl, preferably C1-C 4 - alkyl, and / or halogen, preferably chlorine and / or bromine, substituted C 5 - to Cg-cycloalkyl, Cg to C 2 ⁇ aryl, preferably phenyl or naphthyl, C 6 - to C 2 o-aryloxy, preferably phenoxy, naphthyloxy, or C 7 - to C j2 -aralkyl, preferably phenyl-C ] -C -alkyl,
• k for 0 or a number from 1 to 15, preferably for a number from 1 to
• Aromatic polycarbonates and / or aromatic polyester carbonates 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 the production of aromatic polycarbonates see, for example, Schnell, "Chemistry and Physics of Polycarbonates", Interscience Publishers, 1964 and DE-AS 1 495 626 , DE-OS 2 232 877, DE-OS 2 703 376, DE-OS 2 714 544, DE-OS 3 000 610, DE-OS 3 832 396; for the production of aromatic polyester carbonates e.g. DE-OS 3 077 934 ).
• Aromatic polycarbonates are produced e.g. by reacting diphenols with carbonic acid halides, preferably phosgene and / or with aromatic dicarboxylic acid dihalides, preferably benzenedicarboxylic acid dihalogenides, according to the phase interface method, if appropriate using chain terminators, for example monophenols and if appropriate using trifunctional or more than trifunctional branching agents or triphenols, for example triphenols.
• Polyester carbonates are preferably those of the formula (II)
• A is a single bond, C] -C 5 alkylene, C 2 -C5 alkylidene, C 5 -C6 cycloalkylene, -O-, -SO-, -CO-, -S-, -SO 2 -, Cg -C ⁇ aryls, to which further aromatic rings optionally containing heteroatoms can be condensed,
• B each C 1 -C 2 alkyl, preferably methyl, halogen, preferably chlorine and / or bromine
• R 5 and R 6 can be selected individually for each X 1 , independently of one another hydrogen or -CC 6 alkyl, preferably hydrogen, methyl or ethyl,
• 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 i -C 5 alkanes, bis (hydroxyphenyl) -C 5 -C6 cycloalkanes, bis (hydroxyphenyl) ether, bis (hydroxyphenyl) sulfoxides, bis (hydroxyphenyl) ketones, bis (hydroxyphenyl) sulfones and ⁇ , ⁇ -bis (hydroxyphenyl) diisopropyl benzenes and their core-brominated and / or core-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'-dihydroxydiphenyl sulfide, 4,4'-dihydroxydiphenyl sulfone and their di- and tetrabrominated or chlorinated
• 2,2-bis (4-hydroxyphenyl) propane (bisphenol-A) is particularly preferred.
• the diphenols are known from the literature or can be obtained by processes known from the literature.
• Chain terminators suitable for the production 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- (1,3-tetramethylbutyl) -phenol according to DE-OS 2 842 005 or monoalkylphenol or dialkylphenols with a total of 8 to 20 carbon atoms in the alkyl substituents, such as 3,5-di-tert-butylphenol, p-iso-octylphenol, p-tert.
• alkylphenols such as 4- (1,3-tetramethylbutyl) -phenol according to DE-OS 2 842 005 or monoalkylphenol or dialkylphenols with a total of 8 to 20 carbon atoms in the alkyl substituents, such as 3,5-di-tert-butylphenol, p-iso-octy
• thermoplastic, aromatic polycarbonates have average weight-average molecular weights (M w , measured, for example, by means of an ultracentrifuge or scattered light measurement) of 10,000 to 200,000, preferably 20,000 to 80,000.
• thermoplastic, aromatic polycarbonates can be branched in a known manner, preferably by incorporating 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.
• copolycarbonates Both homopolycarbonates and copolycarbonates are suitable.
• 1 to 25% by weight, preferably 2.5 to 25% by weight (based on the total amount of diphenols to be used) of polydiorganosiloxanes with hydroxy-aryloxy end groups can also be used. These are known (see, for example, US Pat. No. 3,419,634) or can be produced by processes known from the literature.
• the production of polydiorganosiloxane-containing copolycarbonates is e.g. B. described in DE-OS 3 334 782.
• preferred polycarbonates are the copolycarbonates of bisphenol A with up to 15 mol%, based on the molar sum of diphenols, of other diphenols mentioned as preferred or particularly preferred, in particular 2,2-bis (3, 5-dibromo-4-hydroxyphenyl) propane.
• Aromatic dicarboxylic acid dihalides for the production 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 carbonic acid halide preferably phosgene, is additionally used as a bifunctional acid derivative.
• aromatic polyester carbonates In addition to the monophenols already mentioned, their chain terminators for the production of the aromatic polyester carbonates are their chlorocarbonic acid esters and the acid chlorides of aromatic monocarboxylic acids, which may be substituted by C r C 22 alkyl groups or by halogen atoms, and aliphatic C 2 -C 22 - Monocarboxylic acid chlorides into consideration.
• the amount of chain terminators is in each case 0.1 to 10 mol%, based on moles of diphenols in the case of the phenolic chain terminators and on moles of dicarboxylic acid dichlorides in the case of monocarboxylic acid chloride chain terminators.
• the aromatic polyester carbonates can also contain aromatic hydroxycarboxylic acids.
• the aromatic polyester carbonates can be linear or branched in a known manner (see also DE-OS 2 940 024 and DE-OS 3 007 934).
• 3- or polyfunctional carboxylic acid chlorides such as trimesic acid trichloride, cyanuric acid trichloride, 3,3 '-, 4,4'-benzophenonetetracarboxylic acid tetrachloride, 1, 4,5,8-naphthalenetetracarboxylic acid tetrachloride or pyromellitic acid tetrachloride
• branching agents in amounts of 0.01 up to 1.0 mol% (based on the dicarboxylic acid dichlorides used) or 3- or polyfunctional phenols, such as phloroglucin, 4,6-dimethyl-2,4,6-tri- (4-hydroxyphenyl) -hepten-2 , 4,4-dimethyl-2,4-6-tri- (4-hydroxyphenyl) heptane, 1,3,5-tri- (4-hydroxyphenyl) benzene, 1,1,1-tri- (4- hydroxyphenyl) ethane, tri-
• the proportion of carbonate structural units in the thermoplastic, aromatic polyester carbonates 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 content of the aromatic polyester carbonates can be present in the form of blocks or randomly distributed in the polycondensate.
• the relative solution viscosity ( ⁇ re ,) of the aromatic polycarbonates and polyester carbonates is in the range from 1.18 to 1.4, preferably 1.22 to 1.3 (measured on
• thermoplastic, aromatic polycarbonates and polyester carbonates can be used alone or in any mixture with one another.
• Component B comprises one or more graft polymers of
• B.2 95 to 5, preferably 70 to 20% by weight of one or more particulate diene rubbers with glass transition temperatures ⁇ 10 ° C, preferably ⁇ 0 ° C, particularly preferably ⁇ -20 ° C, which are produced by emulsion polymerization using an initiator system made from organic hydroperoxide and ascorbic acid.
• the graft base B.2 generally has an average particle size (d 50 value) of 0.05 to 5 ⁇ m, preferably 0.10 to 0.6 ⁇ m, particularly preferably 0.20 to 0.40 ⁇ m.
• Monomers B.l are preferably mixtures of
• Bl .l 50 to 99 parts by weight of vinyl aromatics and / or core-substituted vinyl aromatics (such as styrene, ⁇ -methylstyrene, p-methylstyrene, p-chlorostyrene) and / or methacrylic acid (C, -C 8 ) - Alkyl esters (such as methyl methacrylate, ethyl methacrylate) and
• Methacrylonitrile and / or (meth) acrylic acid (C, -C 8 ) alkyl esters (such as
• Anhydrides and imides) of unsaturated carboxylic acids for example maleic anhydride and N-phenyl-maleimide.
• Preferred monomers B.l.l are selected from at least one of the monomers styrene, ⁇ -methylstyrene and methyl methacrylate
• preferred monomers B.l.2 are selected from at least one of the monomers acrylonitrile, maleic anhydride and methyl methacrylate.
• Particularly preferred monomers are B.l.l styrene and B.l.2 acrylonitrile.
• Preferred graft bases B.2 are diene rubbers (for example based on butadiene, isoprene etc.) or mixtures of diene rubbers or copolymers of diene rubbers or their mixtures with other copolymerizable monomers (For example according to B1 and B1), with the proviso that the glass transition temperature of component B.2 is below ⁇ 10 ° C, preferably ⁇ 0 ° C, particularly preferably ⁇ -10 ° C.
• Pure polybutadiene rubber is particularly preferred.
• particulate diene rubber with an average particle diameter of 0.1 to 0.6 ⁇ m
• an initiator system composed of an organic hydroperoxide and ascorbic acid is used for graft polymerization to achieve a graft yield of> 60% by weight, preferably> 75% by weight, in particular> 85% by weight (based on monomers Bl or b) used.
• an initiator system made of organic hydroperoxide (I) i ⁇ ascorbic acid (II), in which generally 0.3 to 1.5 parts by weight (I) and 0.1 to 1 part by weight (II), in each case based on 100 parts by weight of graft
• the rubbers are generally partially crosslinked and have gel contents of 10 to 90% by weight, in particular 40 to 80% by weight, and are particulate with them average particle sizes (d 50 values) of 0.1 to 0.6 ⁇ m, in particular 0.2 to 0.4 ⁇ m.
• Such particulate rubbers are known. They are produced by emulsion polymerization and are usually in the form of latices.
• the graft polymers are in aqueous emulsion by polymerizing the
• Monomers are prepared on a rubber present in an aqueous emulsion.
• Surface-active auxiliaries are usually used, emulsifiers or dispersants and, if appropriate, additives in order to adjust certain pH values and electrolyte contents in the graft polymerization.
• the emulsion graft polymerization can also be carried out without the addition of an emulsifier, in particular when working with small amounts of monomer, based on the amount of rubber, or when the amounts of emulsifier already present in the rubber emulsion (latex) are already sufficient to effect the graft polymerization of the To ensure monomers in the emulsion state with sufficient emulsion stability.
• Anionic emulsifiers preferably alkali salts of fatty acids, resin acids, disproportionated resin acids, alkyl sulfonic acids, aryl sulfonic acids, are particularly suitable. They are used in amounts of up to 5% by weight, preferably up to 2.5% by weight, based on the monomers to be polymerized.
• Suitable hydroperoxides are, for example, cumene hydroperoxide, tert-butyl hydroperoxide, hydrogen peroxide, preferably cumene hydroperoxide and tert-butyl hydroperoxide, ie hydroperoxides with long half-lives.
• An aqueous emulsion of a partially cross-linked diene rubber is grafted discontinuously or continuously in an aqueous emulsion; at polymerization temperatures of 40 to 70 ° C, in particular 50 to 70 ° C, the rubber emulsion is mixed with the graft monomers and, if appropriate, additional emulsifier and hydroperoxide and ascorbic acid solutions. The proportions as described above must be observed. In exceptional cases, the Polymerization as a further component of the starter system, catalytically small amounts of heavy metal cations, in particular Fe, are added, especially when diene rubber emulsions must be used which already contain large amounts of complexing agents.
• the process is normally carried out without the addition of iron ions; this method is preferred and allows technically advantageous the production of graft polymers that are practically free or low in heavy metals, since it is known that such traces of metal can have a disadvantageous effect on the application properties of plastics.
• the process works with aqueous solutions of ascorbic acid and aqueous solutions of hydroperoxide; It is advantageous to feed not enough water-soluble hydroperoxides, such as cumene hydroxide, into the polymerization system in the form of an aqueous emulsion.
• the same emulsifier is advantageously used in such emulsions as in graft polymerization.
• the hydroperoxide and the ascorbic acid can be metered into the graft polymerization in portions or continuously.
• the hydroperoxide is initially charged in the reactors with the rubber to be grafted; the graft monomers and the remaining ascorbic acid, hydroperoxide and, if appropriate, emulsifier are fed separately into the reactor with the progressive polymerization of the graft monomers.
• the amounts of hydroperoxide and ascorbic acid are critical. If hydroperoxide and / or ascorbic acid is overdosed, the graft polymerization is impaired. The yield of graft drops; the molecular weight of the grafted and free resin decreases; Exceeding or exceeding the amounts of hydroperoxide and ascorbic acid can also have a sensitive effect on monomer conversion and emulsion stability, so that the technical implementation of the graft polymerization becomes impossible. In order to optimize the implementation of the process, the structure of the graft polymers and their physical properties, a temperature of 40 to 70 ° C. and the amounts of hydroperoxide / ascorbic acid given above must be observed during the graft polymerization.
• graft polymerization up to monomer conversions of greater than 90% by weight, in particular greater than 98% by weight, storage-stable graft polymer emulsions with polymer contents of 25 to 50% by weight are obtained; the graft polymer itself can easily be isolated from the emulsions by known coagulation processes (for example by means of acids or salts). If one wants to combine the graft polymers with thermoplastic resins, which are themselves in the form of an emulsion, the graft polymer emulsion can be mixed with the resin emulsion and coagulated together.
• the gel content of the graft base B.2 is determined at 25 ° C. in a suitable solvent (M. Hoffmann, H. Krömer, R. Kuhn, Polymeranalytik I and II, Georg Thieme-Vlag, Stuttgart 1977).
• the average particle size d 50 is the diameter above and below which 50% by weight of the particles lie. It can be measured using an ultracentrifuge
• Component C comprises one or more thermoplastic vinyl (co) polymers C.1 and / or polyalkylene terephthalates C.2.
• Suitable as (co) polymers C.1 are polymers of at least one monomer from the group of the vinyl aromatics, vinyl cyanides (unsaturated nitriles),
• the (co) polymers C.l are resin-like, thermoplastic and rubber-free.
• the copolymer of C.I. 1 styrene and C.1.2 acrylonitrile is particularly preferred.
• the (co) polymers according to C.l are known and can be radicalized
• the (co) polymers according to component C. 1 preferably have molecular weights M w (weight average, determined by light scattering or sedimentation) between 15,000 and 200,000.
• the polyalkylene terephthalates of component C.2 are reaction products from aromatic dicarboxylic acids or their reactive derivatives, such as dimethyl esters or anhydrides, and aliphatic, cycloaliphatic or araliphatic diols and mixtures of these reaction products.
• Preferred polyalkylene terephthalates contain at least 80% by weight, preferably at least 90% by weight, based on the dicarboxylic acid component of terephthalic acid residues and at least 80% by weight, preferably at least 90 mol%, based on the diol component of ethylene glycol and / or butanediol -l, 4 residues.
• the preferred polyalkylene terephthalates can contain up to 20 mol%, preferably up to 10 mol%, of residues of other aromatic or cycloaliphatic dicarboxylic acids with 8 to 14 C atoms or aliphatic dicarboxylic acids with 4 to 12 C atoms, such as, for example Residues of phthalic acid, isophthalic acid, naphthalene-2,6-dicarboxylic acid, 4,4'-diphenyldicarboxylic acid, succinic acid, adipic acid, sebacic acid, azelaic acid, cyclohexane-diacetic acid.
• Residues of phthalic acid isophthalic acid, naphthalene-2,6-dicarboxylic acid, 4,4'-diphenyldicarboxylic acid, succinic acid, adipic acid, sebacic acid, azelaic acid, cyclohexane-diacetic acid.
• the preferred polyalkylene terephthalates can contain up to 20 mol%, preferably up to 10 mol%, other aliphatic diols with 3 to 12 carbon atoms or cycloaliphatic diols with 6 to 21 Contain carbon atoms, e.g.
• the polyalkylene terephthalates can be prepared by incorporating relatively small amounts of trihydric or tetravalent alcohols or 3- or 4-basic carboxylic acids, e.g. according to DE-OS
• branching agents are trimesic acid, trimellitic acid, trimethylolethane and -propane and pentaerythritol.
• polyalkylene terephthalates which have been prepared solely from terephthalic acid and its reactive derivatives (for example its dialkyl esters) and ethylene glycol and / or 1,4-butanediol, and mixtures of these polyalkylene terephthalates.
• Mixtures of polyalkylene terephthalates contain 1 to 50% by weight, preferably 1 to 30% by weight, polyethylene terephthalate and 50 to 99% by weight, preferably 70 to 99% by weight, polybutylene terephthalate.
• the polyalkylene terephthalates preferably used generally have an intrinsic viscosity of 0.4 to 1.5 dl / g, preferably 0.5 to 1.2 dl / g, measured in phenol / o-dichlorobenzene (1: 1 parts by weight) at 25 ° C. in the Ubbelohde viscometer.
• the polyalkylene terephthalates can be prepared by known methods (see e.g. Kunststoff-Handbuch, Volume VIII, p. 695 ff, Carl-Hanser-Verlag, Kunststoff 1973).
• Phosphazenes according to component D which are used according to the present invention, are linear phosphazenes according to formula (Ia) and cyclic phosphazenes according to formula (Ib)
• R and k have the meaning given above. Examples include:
• Phenoxyphosphazene is preferred.
• the phosphazenes can be used alone or as a mixture.
• the radical R can always be the same or 2 or more radicals in the formulas (Ia) and (Ib) can be different.
• the fluorinated polyolefins E are of high molecular weight and have glass transition temperatures of above -30 ° C., generally above 100 ° C., fluorine contents, preferably from 65 to 76, in particular from 70 to 76% by weight, average particle diameter d 50 of 0, 05 to 1,000, preferably 0.08 to 20 ⁇ m. In general, the fluorinated polyolefins E have a density of 1.2 to 2.3 g / cm 3 .
• Preferred fluorinated polyolefins E are polytetrafluoroethylene, polyvinylidene fluoride, tetrafluoroethylene (hexafluoropropylene and ethylene / tetrafluoroethylene copolymers.
• They can be prepared by known processes, for example by polymerizing tetrafluoroethylene in an aqueous medium with a free radical-forming catalyst, for example sodium, potassium or ammonium peroxydisulfate at pressures from 7 to 71 kg / cm 2 and at temperatures from 0 to 200 ° C, preferably at temperatures from 20 to 100 ° C.
• a free radical-forming catalyst for example sodium, potassium or ammonium peroxydisulfate
• the density of these materials can be between 1.2 and 2.3 g / cm 3 , the average particle size between 0.5 and 1000 ⁇ m.
• Fluorinated polyolefins E preferred according to the invention are tetrafluoroethylene polymers with average particle diameters of 0.05 to 20 ⁇ m, preferably 0.08 to
• Suitable fluorinated polyolefins E that can be used in powder form are tetrafluoroethylene polymers with average particle diameters of 100 to 1,000 ⁇ m and densities of 2.0 g / cm 3 to 2.3 g / cm 3 .
• Tetrafluoroethylene polymer E mixed; Suitable tetrafluoroethylene polymer emulsions usually have solids contents of 30 to 70% by weight, in particular 50 to 60% by weight, preferably 30 to 35% by weight.
• the quantity in the description of component B can be the proportion of
• graft polymer for the coagulated blend of graft polymer and fluorinated polyolefins.
• the equilibrium ratio of graft polymer B to tetrafluoroethylene polymer E in the emulsion mixture is 95: 5 to 60:40.
• Emulsion mixture coagulated in a known meadow for example by spray drying NEN, freeze drying or coagulation by adding inorganic or organic salts, acids, bases or organic, water-miscible solvents, such as alcohols, ketones, preferably at temperatures from 20 to 150 ° C, in particular from 50 to 100 ° C. If necessary, drying can be carried out at 50 to 200 ° C., preferably 70 to 100 ° C.
• Suitable tetrafluoroethylene polymer emulsions are commercially available products and are offered, for example, by DuPont as Teflon® 30 N.
• the molding compositions according to the invention can contain at least one of the customary additives, such as lubricants and mold release agents, nucleating agents, antistatic agents, stabilizers and dyes and pigments.
• customary additives such as lubricants and mold release agents, nucleating agents, antistatic agents, stabilizers and dyes and pigments.
• the molding compositions according to the invention can contain up to 35% by weight, based on the total molding composition, of a further flame retardant which may have a synergistic action.
• Organic halogen compounds such as decabromobisphenyl ether, tetrabromobisphenol, inorganic halogen compounds such as ammonium bromide, nitrogen compounds such as melamine, melamine formaldehyde resins, inorganic hydroxide compounds such as Mg, Al hydroxide, inorganic compounds such as antimony oxides, barium metaborate, hydroxoantimonate, zirconium oxide, zirconium oxide, zirconium oxide, zirconium oxide and zirconium oxide, zirconium oxide, zirconium oxide, zirconium oxide, zirconium oxide, zirconium oxide, zirconium oxide, zirconium oxide, zirconium oxide, zirconium oxide, zirconium oxide, zirconium oxide, zirconium oxide, zircon
• the molding compositions according to the invention containing components A to E and optionally other known additives such as stabilizers, dyes, pigments, lubricants and mold release agents, nucleating agents and antistatic agents are prepared by mixing the respective constituents in a known manner and at temperatures from 200 ° C. to 300 ° C in conventional units such as internal kneaders, extruders and twin-screw extruders, melt-compounded and melt-extruded, wherein component E is preferably used in the form of the coagulated mixture already mentioned.
• the individual constituents can be mixed in a known manner both successively and simultaneously, both at about 20 ° C. (room temperature) and at a higher temperature.
• thermoplastic molding compositions according to the invention are suitable for the production of moldings of any kind, in particular those with increased
• molding compositions of the present invention can be used for the production of moldings of any kind.
• moldings can be produced by injection molding.
• moldings that can be produced are: housing parts each
• Type e.g. for household appliances such as juicers, coffee machines, mixers, for office machines such as monitors, printers, copiers, or cover plates for the construction sector and parts for the motor vehicle sector. They can also be used in the field of electrical engineering because they have very good electrical properties.
• the molding compositions according to the invention can furthermore be used, for example, for the production of the following moldings or moldings:
• Another form of processing is the production of molded articles by deep drawing from previously produced sheets or foils.
• Another object of the present invention is therefore also the use of the molding compositions according to the invention for the production of moldings of any kind, preferably those mentioned above, and the molded articles from the inventive ones
• the emulsion contains 50% by weight polymer solid.
• Ba graft polymer composed of 55% by weight of diene rubber (B.2) and 45% by weight
• a mixture of 200 parts by weight of the latex (B.2) and 149 parts by weight of water are placed in a reactor and heated to 60 to 62 ° C. At this temperature, the following two solutions or emulsions are introduced into the reactor in the following order:
• the mixture is then polymerized at 60 to 62 ° C for 6 hours.
• the monomer conversion is greater than 97% by weight.
• the graft polymer After stabilization with 1.2 parts by weight of phenolic antioxidant, per 100 parts by weight of graft polymer, the graft polymer is isolated by coagulation with an acetic acid / Mg sulfate mixture, washed and dried to a powder.
• the SAN grafting proceeded with a grafting yield of 89% by weight.
• the graft yield was determined by fractional segregation with the segregating liquids dimethylformamide / methylcyclohexane in the ultracentrifuge and by determining the amounts and the chemical Composition of the fractions thus obtained (see R. Kuhn, Makromol-Chemie 177, 1525 (1976)).
• Bb graft polymer composed of 55% by weight of diene rubber (B.2) and 45% by weight of SAN copolymer
• the mixture is then polymerized by stirring at 65 ° C within 4 hours.
• the monomer conversion is greater than 98% by weight.
• the graft polymer is stabilized and isolated in accordance with regulation Ba).
• the SAN grafting proceeded with a grafting yield of 55% by weight.
• the graft yield was determined as for Ba).
• Styrene / acrylonitrile copolymer with a styrene / acrylonitrile weight ratio of 72:28 and an intrinsic viscosity of 0.55 dl / g (measurement in dimethylformamide at 20 ° C).
• Tetrafluoroethylene polymer as a coagulated mixture of a SAN graft polymer emulsion according to component B above in water and a tetrafluoroethylene polymer emulsion in water.
• the weight ratio of graft polymer B to tetrafluoroethylene polymer E in the mixture is 90% by weight to 10% by weight.
• the tetrafluoroethylene polymer emulsion has a solids content of 60% by weight, the average particle diameter is between 0.05 and 0.5 ⁇ m.
• the emulsion of the tetrafluoroethylene polymer (Teflon 30 N from DuPont) is mixed with the emulsion of the SAN graft polymer B and stabilized with 1.8% by weight, based on polymer solids, of phenolic antioxidants.
• the mixture is coagulated with an aqueous solution of MgSO4 (Epsom salt) and acetic acid at pH 4 to 5, filtered and washed until practically free of electrolytes, then freed from the main amount of water by centrifugation and then at 100 ° C dried a powder. This powder can then be compounded with the other components in the units described.
• the components are mixed on a 3-1 kneader.
• the moldings are produced on an Arburg 270 E injection molding machine at 260 ° C.
• the heat resistance according to Vicat B is determined in accordance with DIN 53 460 (ISO 306) on rods measuring 80 x 10 x 4 mm.
• the impact strength according to DIN 53 453 is measured on the weld line of test specimens injected on both sides (processing temperature 260 ° C) of the dimension 170 x 10 x 4 mm.
• the stress crack behavior was investigated on bars measuring 80 x 10 x 4 mm, processing temperature 260 ° C. A mixture of 60 vol.% Toluene and 40 vol.% Isopropanol was used as the test medium. The test specimens were pre-stretched using a circular arch template (pre-stretching in percent) and stored in the test medium at room temperature. The stress cracking behavior was assessed via the cracking or breaking depending on the pre-stretching in the test medium. The composition and properties are summarized in Table 1 below.

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• 1998
  • 1998-06-26 DE DE19828538A patent/DE19828538A1/de not_active Withdrawn
• 1999
  • 1999-06-12 BR BR9911580-8A patent/BR9911580A/pt not_active IP Right Cessation
  • 1999-06-12 US US09/720,273 patent/US6747078B1/en not_active Expired - Lifetime
  • 1999-06-12 WO PCT/EP1999/004061 patent/WO2000000543A1/de active IP Right Grant
  • 1999-06-12 KR KR1020007014737A patent/KR100617431B1/ko not_active IP Right Cessation
  • 1999-06-12 EP EP99929192A patent/EP1095098A1/de not_active Ceased
  • 1999-06-12 AU AU46091/99A patent/AU4609199A/en not_active Abandoned
  • 1999-06-12 CA CA002336252A patent/CA2336252A1/en not_active Abandoned
  • 1999-06-12 JP JP2000557301A patent/JP2002519463A/ja active Pending
  • 1999-06-12 CN CNB998079294A patent/CN1146629C/zh not_active Expired - Lifetime
  • 1999-06-14 TW TW088109864A patent/TW565590B/zh active
  • 1999-06-25 AR ARP990103068A patent/AR016727A1/es not_active Application Discontinuation
• 2002
  • 2002-01-28 HK HK02100648.4A patent/HK1039138A1/zh unknown
• 2009
  • 2009-12-25 JP JP2009295763A patent/JP2010065237A/ja not_active Withdrawn

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