Abstract: Thermoplastic molding materials preparedA) from 35 to 99.5% by weight of a matrix copolymer (A) ofa.sub.1) from 50 to 95% by weight of styrene and/or .alpha.-methylstyrene,a.sub.2) from 5 to 50% by weight of acrylonitrile anda.sub.3) from 0 to 20% by weight of further comonomersB) from 0 to 50% by weight of a particulate graft copolymer (B) which is insoluble in (A), has a median particle diameter of from 0.03 to 1 .mu.m and preparedb.sub.1) from 30 to 80% by weight of a core comprising an elastomeric polymer having a glass transition temperature of less than -10.degree. C. andb.sub.2) from 20 to 70% by weight of a graft shell comprising a polymer which is compatible or partly compatible with (A)andC) from 0.5 to 30% by weight of a particulate crosslinked copolymer (C) which is insoluble in (A), has a median particle diameter of from 0.5 to 50 .mu.m and comprisesc.sub.1) from 50 to 89.95% by weight of styrene and/or .alpha.-methylstyrene,c.sub.2) from 10 to 50% by weight of acrylonitrile,c.sub.3) from 0.

Abstract: A process for preparing polyacetals by copolymerization of glyoxylic esters with other copolymerizable monomers in the presence of anionic or cationic polymerization initiators, with or without the introduction of stable end groups and with or without hydrolysis of the copolymerized units of glyoxylic ester present in the copolymer comprises using as monomers cyclic formals derived from diols, homopolymers of formaldehyde, trioxepane or mixtures thereof, although up to 50% by weight of this group of monomers may be replaced by other customary copolymerizable monomers, and the poly(acetal-carboxylate)s thus obtainable are useful as additives in reduced-phosphate and phosphate-free detergents and cleaners, as water treatment agents and as dispersants for finely divided substances.

Abstract: Moldings based on polyamides are surface treated with mixtures of at least 20% strength by weight aqueous hydrochloric acid with mono- or diethers of an aliphatic polyfunctional hydroxy compound in a mixing ratio of from 90:10 to 10:90% by volume.

Abstract: 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.

Abstract: A thermoplastic molding material based onA) from 2 to 97.5% w/w of a homopolymer or copolymer of polyoxymethyleneB) from 2 to 97.5% w/w of a polyamideC) from 0.5 to 25% w/w of a polycondensate of 2,2-di(4-hydroxyphenyl)propane and epichlorohydrinD) from 0 to 60% w/w of an impact modifier, andE) from 0 to 60% w/w of fibrous or particulate fillers or mixtures thereof.

Abstract: Thermoplastic molding materials based on a mixture of polybutylene terephthalate and polyethylene terephthalate (a.sub.1), graft polymers having acrylate rubbers as the grafting base (a.sub.2), copolymers of vinylaromatic monomers and acrylonitrile or methacrylonitrile (a.sub.3) and glass fibers (B) have a balanced property spectrum.

Abstract: A process for the surface treatment of moldings based on liquid crystalline polymers with acidic or alkaline reagents includes using the reagents in a solvent which is an organic solvent to an extent of not less than 60% by weight.

Abstract: Thermoplastic molding materials which are free of cyanuric acid or cyanuric acid derivatives contain as essential components,(A) from 5 to 95% by weight of a toughened polyamide ofa1) from 70 to 98% by weight, based on (A), of a polyamide anda2) from 2 to 30% by weight, based on (A), of an emulsion polymer whose particles do not have a hard outer shell, and(B) from 5 to 95% by weight of a functionalized polyphenylene ether.

Abstract: Reinforced thermoplastic molding materials containing, as essential components,(A) from 40 to 94 parts by weight of a polymer component of(a.sub.1) from 10 to 90% by weight of polyphenylene ether and(a.sub.2) from 10 to 90% by weight, based in each case on A, of a styrene polymer toughened with an acrylate rubber or with an unhydrogenated or hydrogenated polymer of a conjugated diene,(B) from 1 to 20 parts by weight of a copolymer of(b.sub.1) from 70 to 99.9% by weight of a monomer from the group consisting of styrene, .alpha.-methylstyrene and styrene alkylated in the nucleus or a mixture of these monomers,(b.sub.2) from 0.1 to 30% by weight of one or more compounds from the group consisting of tert-butyl acrylate and tert-butyl methacrylate, or one or more compounds from the group of compounds of the general formula I ##STR1## where R.sup.1 is hydrogen or methyl and R.sup.2, R.sup.3 and R.sup.

Abstract: The flameproofing agent content of molding compositions containing polyesters (a.sub.1), acrylate graft polymers (a.sub.2), styrene/acrylonitrile copolymers (a.sub.3) and glass fibers can be reduced without affecting the flame resistance by adding finely divided PTFE.

Abstract: 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.

Abstract: Thermoplastic polyester molding materials essentially contain(A) from 20 to 89% by weight of one or more aliphatic polyesters of an aromatic dicarboxylic acid,(B) from 10 to 79% by weight of one or more aromatic polycarbonates and(C) from 1 to 40% by weight of an elastomer or of a mixture of elastomers consisting ofCA from 5 to 100% by weight of an elastomeric graft polymer composed ofCA1 not less than 50% by weight of a grafting base having a glass transition temperature T.sub.g of less than -20.degree. C.,CA2 from 5 to 20% by weight of a first graft shell consisting of a mixture of a C.sub.1 -C.sub.8 -alkyl ester of acrylic acid and a vinylaromatic in a weight ratio of from 5:95 to 70:30 andCA3 from 10 to 30% by weight of a second graft shell consisting of one or more polymers having a glass transition temperature T.sub.g above 20.degree. C.

Abstract: Fireproofed thermoplastic molding materials which contain red phosphorus as a flame-proofing agent are obtainable by mixing(A) from 5 to 95% by weight of a polyamide or of a polyester or of a mixture of these,(B) from 5 to 95% by weight of an elastomer dispersion containing, as essential components,(b.sub.1) from 5 to 75% by weight of an elastomer prepared by emulsion polymerization,(b.sub.2) from 10 to 70% by weight of red phosphorus, p2 (b.sub.3) from 10 to 80% by weight of water and(b.sub.4) from 0.1 to 5% by weight of dispersant, and(C) from 0 to 60% by weight of fibrous or particulate fillers or a mixture of these,the total content of red phosphorus in the molding material being from 3 to 20% by weight, based on the total weight of the molding material, and the elastomer composition being introduced into a melt of the polyamide or of the polyester or of a mixture of these.

Abstract: The present invention relates to aqueous binder dispersions for the preparation of, inter alia, paints and finishes, substantially containing(A) from 0.5 to 50% by weight of a phenolic resin precondensate,(B) from 20 to 70% by weight of a copolymer of predominant proportions of alkyl acrylates and/or methacrylates, minor proportions of comonomers with groups capable of crosslinking and other comonomers, the copolymer being in the form of a dispersion and being crosslinkable by a condensation reaction, and(C) from 10 to 70% by weight of a graft elastomer comprising a diene polymer as the base polymer and a copolymer of, substantially, styrene, acrylonitrile and C.sub.1 -C.sub.6 -alkyl acrylates and/or methacrylates, as the graft polymer, the graft elastomer being in the form of a dispersion, the percentages being based on the solids content of the total amount of (A), (B) and (C).

Abstract: High-impact polyamide molding compositions contain as essential components(X) from 40 to 98% by weight, based on (X)+(Y), of a thermoplastic polyamide,(Y) from 2 to 60% by weight, based on (X)+(Y), of a rubberlike polymer which contains, as copolymerized units, an acrylic or methacrylic ester or an unsaturated carboxylic acid,(Z) from 0.001 to 2% by weight, based on (X)+(Y), of a metal compound selected from the group consisting of(Z.sub.1) salts of divalent, trivalent or tetravalent metals with C.sub.2 -C.sub.4 -carboxylic acids,(Z.sub.2) oxides of germanium or antimony and(Z.sub.3) alkyl orthotitanates and dialkyltin dilaurates.

Abstract: The present invention relates to aqueous binder dispersions for the preparation of, inter alia, paints and finishes, substantially containing(A) from 0.5 to 50% by weight of a phenolic resin precondensate,(B) from 20 to 70% by weight of a copolymer of predominant proportions of alkyl acrylates and/or methacrylates, minor proportions of comonomers with groups capable of crosslinking and other comonomers, the copolymer being in the form of a dispersion and being crosslinkable by a condensation reaction, and(C) from 10 to 70% by weight of a graft elastomer comprising a diene polymer as the base polymer and a copolymer of, substantially, styrene, acrylonitrile and C.sub.1 -C.sub.6 -alkyl acrylates and/or methacrylates, as the graft polymer, the graft elastomer being in the form of a dispersion, the percentages being based on the solids content of the total amount of (A), (B) and (C).

Abstract: Thermoplastic molding materials contain, as essential components,(A) from 10 to 89.99% by weight of a polyester,(B) from 10 to 89.99% by weight of a polycarbonate and(C.sub.1) from 0.01 to 1% by weight of a low molecular weight organic compound of not more than 70 carbon atoms which contains (--SO.sub.3).sub.m Q groups where Q is hydrogen, NH.sub.4 or an alkali or alkaline earth metal and m is an integer equal to the valency of Q, and/or(C.sub.2) from 0.01 to 30% by weight of a polymer containing sulfo groups and having a weight average molecular weight of not less than 1000,and, as a further component,(D) from 0 to 30% by weight of a rubber impact modifier.

Abstract: Thermoplastic molding compositions which contain(A) 50-99% by weight of a polyalkylene terephthalate and/or of a polycarbonate and(B) 1-50% by weight of an elastomeric polymer having epoxy and/or carboxyl groups on the surface,wherein component (B) is a graft polymer prepared by emulsion polymerization and has a glass transition temperature of below 0.degree. C. and a gel content of not less than 50%, have a high impact strength even at low temperatures.

Abstract: Elastomeric thermoplastic molding materials contain(A) from 5 to 50 parts by volume of a partially or completely crystalline thermoplastic polymer having a melting point of above 160.degree. C., as a coherent phase, and(B) from 95 to 50 parts by volume of one or more crosslinked elastomeric polymers which are prepared by emulsion polymerization, are dispersed in the component A and have a glass transition temperature Tg of below -10.degree. C., the sum of A and B being 100 parts by volume, with the proviso that the mixture of A and B has a Vicat softening temperature, measured according to DIN 53,460, which is 5.degree.-40.degree. C. lower than that of the component A, with or without(C) effective amounts of conventional assistants.

Abstract: A process for the preparation of finely divided acicular hexagonal ferrites which have a high coercive force and are of the general formula MFe.sub.12 O.sub.19, where M is barium or strontium, and their use for the production of magnetic recording media and plastoferrites.