摘要:
Filler-containing thermoplastic molding materials containing, as essential components,A) from 10 to 84% by weight of a thermoplastic polyamide,B) from 10 to 84% by weight of a modified polyphenylene ether,C) from 5 to 40% by weight of a fibrous or particulate filler or a mixture thereof, andD) from 1 to 20% by weight of a zinc sulfide pigment, and, in addition,E) from 0 to 30% by weight of an impact-modifying rubber andF) from 0 to 25% by weight of a flameproofing agent, are described.
摘要:
A flameproof, halogen-free thermoplastic molding material contains, based on the molding material consisting of A, B, C, D and E,(A) 40 to 95% by weight of a thermoplastic halogen-free aromatic polycarbonate based on a diphenol,(B) from 5 to 30% by weight of one or more halogen-free graft polymers obtained from, based on B,(b.sub.1) an elastomer (rubber), which accounts for from 40 to 80% by weight, and(b.sub.2) a graft shell on this elastomer which accounts for from 20 to 60% by weight,(C) from 5 to 50% by weight of one or more halogen-free thermoplastic copolymers consisting of, based on C, from 50 to 95% by weight of styrene, .alpha.-methylstyrene, styrene which is substituted in the nucleus, methyl methacrylate or a mixture of these, and from 50 to 5% by weight of (meth)acrylonitrile, methyl methacrylate, maleic anhydride, N-substituted maleimide or a mixture of these,(D) 1 to 25% by weight of one or more halogen-free phosphorus compounds of the formula ##STR1## where R.sup.1, R.sup.2 and R.sup.3 independently of one another are each halogen-free C.sub.1 -C.sub.8 -alkyl or halogen-free C.sub.6 -C.sub.20 -aryl and n is 0 or 1, and(E) from 0.05 to 5% by weight of a tetrafluoroethylene polymer. In the molding material, the elastomer (b.sub.1) is prepared by polymerizing a monomer mixture of (b.sub.1 a.sub.1) from70 to 99.9% by weight, based on b.sub.1), of one or more alkyl acrylates where alkyl is of 1 to 8 carbon atoms,(b.sub.1 a.sub.2) from 0 to 30% by weight, based on (b.sub.1), of one or more further copolymerizable monoethylenically unsaturated monomersand b.sub.1 a.sub.3) from 0.1 to 5% by weight, based on B.sub.1), of a copolymerizable polyfunctional, crosslinking monomer.The molding material is used for the production of shaped articles.
摘要:
Preparation of isobutene homopolymers or copolymers having a number average molecular weight of from 500 to 5 000 000 by polymerization of isobutene or an isobutene-comprising monomer mixture in the presence of a Lewis acid or a complex comprising a Lewis acid as polymerization catalyst, wherein the polymerization is carried out in the presence of at least one hemiacetal or full acetal which can be obtained by protic acid-catalyzed reaction of at least one C1-C12-hydrocarbyl alcohol with at least one aldehyde or ketone having from 1 to 12 carbon atoms.
摘要:
Molding compositions comprising: a composition (I) present in an amount of 10 to 100% by weight, based on the molding composition, wherein the composition (I) comprises: (A) 40 to 95% by weight, based on the composition (I), of a copolymer comprising: α-methylstyrene in an amount of 55 to 90% by weight, acrylonitrile in an amount of 10 to 50% by weight, and one or more other monomers in an amount of 0 to 5% by weight, wherein the percentages by weight of the α-methylstyrene, the acrylonitrile and the one or more other monomers are based on the weight of component (A); (B) 2.5 to 75% by weight, based on the composition (I), of a polymer comprising: a vinylaromatic monomer in an amount of 60 to 90% by weight, acrylonitrile in an amount of 8.01 to 39.8% by weight, and maleic anhydride in an amount of 0.2 to 1.99% by weight, wherein the percentages by weight of the vinylaromatic monomer, the acrylonitrile and the maleic anhydride are based on the weight of component (B); and (C) 2.5 to 60% by weight, based on the composition (I), of glass fibers.
摘要:
Preparation of isobutene homopolymers or copolymers having a number average molecular weight of from 500 to 5 000 000 by polymerization of isobutene or an isobutene-comprising monomer mixture in the presence of a Lewis acid or a complex comprising a Lewis acid as polymerization catalyst, wherein the polymerization is carried out in the presence of at least one hemiacetal or full acetal which can be obtained by protic acid-catalyzed reaction of at least one C1-C12-hydrocarbyl alcohol with at least one aldehyde or ketone having from 1 to 12 carbon atoms.
摘要:
A description is given of a semi-interpenetrating network having a first phase of a linear noncrosslinked isobutene polymer and a second phase of a crosslinked polymer, wherein the crosslinked polymer is obtained by crosslinking molecular enlargement reaction in the presence of the isobutene polymer. The crosslinked polymer is preferably obtained by free-radical polymerization of ethylenically unsaturated monomers comprising at least one polyethylenically unsaturated monomer. The networks are suitable as molding compounds having gas and moisture barrier effect or as adhesives.
摘要:
A flameproofed black thermoplastic molding material containingA) from 5 to 98.9% by weight of a thermoplastic polyamide,B) from 1 to 20% by weight of red phosphorusC) from 0.1 to 5% by weight of a colorant complementary with red phosphorus to produce blackened polyamide,D) from 0 to 30% by weight of an elastomeric polymer,E) from 0 to 50% by weight of a fibrous or particulate filler or of a mixture thereof,F) from 0 to 70% by weight of a polyphenylene ether andG) from 0 to 30% by weight of conventional additives and processing assistants,the percentages by weight of components A to G being 100% in each case.
摘要:
A thermoplastic molding composition composed of, based on the total of A, B, C and D,40-95% by weight of a copolymer A of, based on A,90-95% by weight of styrene and/or its derivatives and 10-50% by weight of acrylonitrile, optionally up to 50% by weight of a graft copolymer B of 20-80% by weight of a monomer mixture of either styrene/acrylonitrile in the ration from 9:1 to 4:6 or styrene/acrylonitrile/methylacrylate in the ration from 19:1:1 to 8:6:6 onto 80-20% by weight of an elastomer based on butadiene or acrylic ester as grafting base, graft copolymerization being effected in either emulsion or solution, 1-50% by weight of a reinforcing glass fiber material C and 0.1-50% by weight of a terpolymer D of styrene, methyl methacrylate and maleic anhydride composed of 1-15% by weight each of styrene and maleic anhydride and a styrene/maleic anhydride ratio of from 5:1 to 1:5, and methyl methacrylate.
摘要:
A thermoplastic molding material which is made up of components A, B, C, and D. Component A comprises 10-90% of the composition and is a copolymer made up of 30-95% styrene; 4-40% (meth)acrylonitrile, methyl methacrylate, or maleic anhydride; 1-30% of a monomer described by formula in the specification, N-vinylimidazole or N-vinylcarbazole; and up to 40% of a copolymerizable ethylenically unsaturated monomer. Component B comprises 10-90% of the composition and is a copolymer made up of 50-99.9% of an alpha-olefin; 0.1-50% of a monomer containing acid groups; and up to 40% of a copolymerizable ethylenically unsaturated monomer. Component C comprises up to 80% of the composition and is a copolymer made up of 50-95% styrene and 5-50% (meth)acrylonitrile, methyl methacrylate or maleic anhydride. Component D comprises up to 80% of the composition and is made up of a polycarbonate. All percentages are by weight.
摘要:
Polyphenylene ethers are prepared from monohydric phenols by oxidative coupling with oxygen-containing gases in the presence of an oxidation catalyst in an organic solvent by carrying out the polycondensation in the presence of a defoamer.