Abstract: The present invention relates to processes for preparing copolymers A) with a reduced soil particle content, comprising 49.2 to 93.2% by weight of structural units which derive from one or more vinylaromatic monomers (component A1)), 6 to 50% by weight of structural units which derive from one or more vinyl cyanides (component A2)), 0.

Abstract: The present invention relates to thermoplastic molding compositions comprising a mixture of (A) from 30 to 69% by weight, based on the sum of components (A), (B) and (C), of a methyl methacrylate polymer, (B) from 30 to 69% by weight, based on the sum of components (A), (B) and (C), of a copolymer obtainable by polymerizing a styrenic monomer and a vinyl cyanide, and (C) from 1 to 40% by weight, based on the sum of components (A), (B) and (C), of a graft copolymer obtainable from (C1) from 60 to 90% by weight, based on (C), of a core obtainable by polymerizing a 1,3-diene and a styrenic monomer, (C2) from 5 to 20% by weight, based on (C), of a first graft shell, and (C3) from 5 to 20% by weight, based on (C), of a second graft shell composed of an alkyl (meth)acrylate polymer, with the proviso that the ratio of (C2) to (C3) is in the range from 2:1 to 1:2.

Abstract: The present invention relates to a process for preparation of copolymers A) comprising A1) one or more vinylaromatic monomers, A2) one or more vinyl cyanides, and A3) one or more dicarboxylic anhydrides via bulk polymerization or via solution polymerization, an important feature of the invention being that the polymerization is carried out in the presence of from 0.01 to 0.5% by weight of water, based on the total weight of the polymerization mixture. The present invention further relates to the copolymers A), to thermoplastic molding compositions comprising the copolymers A), to the use of the copolymers A) and of the thermoplastic molding compositions, and also to the moldings, foils, fibers, or foams obtainable from the copolymers A) or from the thermoplastic molding compositions.

Abstract: The present invention relates to thermoplastic molding compositions, comprising a mixture composed of (A) from 30 to 69% by weight, based on the entirety of components (A), (B) and (C), of a methyl methacrylate polymer, (B) from 30 to 69% by weight, based on the entirety of components (A), (B) and (C), of a copolymer, obtainable via polymerization of a vinylaromatic monomer and of a vinyl cyanide, and (C) from 1 to 40% by weight, based on the entirety of components (A), (B) and (C), of a graft copolymer, obtainable from (C1) from 60 to 90% by weight, based on (C), of an agglomerated core based on a 1,3-diene, (C2) from 5 to 20% by weight, based on (C), of a first graft shell composed of a vinylaromatic monomer, of an alkyl methacrylate, and, if appropriate, of a crosslinking monomer, and (C3) from 5 to 20% by weight, based on (C), of a second graft shell composed of an alkyl(meth)acrylate polymer, with the proviso that the ratio by weight of (C2) to (C3) is in the range from 2:1 to 1:2, and it is inventiv

Abstract: Thermoplastic molding compositions comprising a mixture of a component (A), a component (B), a component (C) and a component (D), methods for their preparation and use, and mold-release agents for thermoplastic molding compositions: wherein the component (A) comprises a methyl methacrylate polymer; wherein the component (B) comprises a copolymer prepared by polymerizing from 75 to 88% by weight of a vinylaromatic monomer and from 12 to 25% by weight of a vinyl cyamide; wherein the component (C) comprises a graft copolymer prepared by copolymerizing: from 60 to 90% by weight, based on component (C), of a core, from 5 to 20% by weight, based on component (C), of a first graft shell, and from 5 to 20% by weight, based on component (C), of a second graft shell; and wherein the component (D) comprises at least one highly branched or hyperbranched polymer selected from the group consisting of (D1) highly branched or hyperbranched polycarbonates, (D2) highly branched or hyperbranched polyesters of Ax+By type, where

Abstract: The present invention relates to thermoplastic molding compositions comprising a mixture of (A) from 30 to 69% by weight, based on the sum of components (A), (B) and (C), of a methyl methacrylate polymer, (B) from 30 to 69% by weight, based on the sum of components (A), (B) and (C), of a copolymer obtainable by polymerizing a styrenic monomer and a vinyl cyanide, and (C) from 1 to 40% by weight, based on the sum of components (A), (B) and (C), of a graft copolymer obtainable from (C1) from 60 to 90% by weight, based on (C), of a core obtainable by polymerizing a 1,3-diene and a styrenic monomer, (C2) from 5 to 20% by weight, based on (C), of a first graft shell, and (C3) from 5 to 20% by weight, based on (C), of a second graft shell composed of an alkyl (meth)acrylate polymer, with the proviso that the ratio of (C2) to (C3) is in the range from 2:1 to 1:2, the essence of the invention being that the first graft shell (C2) is obtainable by polymerizing a monomer mixture consisting of (C21) from 30 to 39% by we

Abstract: Process for the recovery of an ethylene and propylene containing stream from a cracked gas resulting from cracking a hydrocarbon stream, wherein the cracked gas is treated in an absorptive demethanizer with a C4/C5 solvent at a temperature between ?10° C. and ?40° C. to free the cracked gas from methane and hydrogen gas, whereafter the remaining stream is treated by distillation in a distillation unit to obtain a C4/C5 containing stream and the ethylene and propylene containing stream; whereafter the C4/C5 stream is treated with a hydrogen containing stream in a hydrogenation unit, whereafter a part of the hydrogenated C4/C5 stream is cooled to a temperature between ?10° C. and ?40° C. and recycled to the absorptive demethanizer and a part of the hydrogenated C4/C5 stream is separated.

Abstract: The molding composition comprises components A, B and, if desired, components C to E, the total weight of which is 100% by weight: a: as component A, from 5 to 95% by weight of a random copolyamide made from a1: from 95.1 to 99.9% by weight of component A1 made from equimolar amounts of at least one linear aliphatic diamine and at least one linear aliphatic dicarboxylic acid a2: from 0.1 to 4.

Abstract: Stabilized styrene polymers comprising one or more vinylaromatic monomers, one or more comonomers and one or more antioxidants are prepared by polymerizing the monomers continuously and adding the antioxidants during the continuous polymerization.

Abstract: The use of microphase-separated polymer blends, comprising A-B-C triblockcopolymers containing an elastomeric middle block B and A′-C′ diblockcopolymers, for the preparation of permeable membranes.

Abstract: A functionalized polymer of the formula A—Z—X where A is a block of vinylaromatic monomers of 8 to 20, preferably 8 to 12, carbon atoms, Z is a basic building block of a compound having sterically hindering groups and X is a functionalized basic building block, the degree of functionalization of the polymer being at least 65%, preferably greater than 85%, particularly preferably at least 90%, a process for its preparation, thermoplastic molding materials containing said polymer, processes for their preparation, the use for the production of moldings, and moldings containing said molding materials.

Abstract: Flame-retardant thermoplastic molding materials contain A) from 5 to 97.7% by weight of a polyphenylene ether, B) from 1 to 93.7% by weight of vinylaromatic polymers, C) from 0 to 50% by weight of impact modifiers, D) from 0.3 to 20% by weight of sheet silicates which contain one or more nitrogen-containing compounds in amounts of from 0.1 to 50% by weight, based on the sheet silicates, E) from 1 to 20% by weight of a flameproofing agent and F) from 0 to 60% by weight of further additives.

Abstract: A functionalized copolymer of the formulaA--B--Z--XwhereA is a block of vinylaromatic monomers of 8 to 20, preferably 8 to 12, carbon atoms,B is a block of alkadiene monomers of 4 to 12, preferably 4 to 8, carbon atoms,Z is a fundamental building block of a compound having sterically hindering groups andX is a functionalized fundamental building block,a process for its preparation, thermoplastic molding materials containing said copolymer, processes for their preparation, the use for the production of moldings and moldings comprising said molding materials.

Abstract: Graft copolymers are prepared by anionic polymerization which comprises reacting polymers (A) having at least one anionic chain end with polymers (B) which contain at least one nitrile group, in the presence of a solvent.

Abstract: A process for preparing block copolymers containing at least one block A, constructed from units of styrene or its technical equivalents (a), and at least one block C, constructed from units of a cyclic lactone (c), by anionic polymerization comprises reacting the living chain end remaining following the construction of block A with a diarylethylene, especially 1,1-diphenylethylene, under anionic polymerization conditions before reaction with the monomer (c), and preferably attaching in a conventional manner to the living end of block A a further block B, constructed from units of a diene, and also at least one further monomer unit (a) before the reaction with the diarylethylene. The block copolymer is useful for producing shaped articles, films or fibers or as a compatibilizer in polymer blends.

Abstract: Thermoplastic molding materials containA) from 50 to 99% by weight, based on the total weight of the molding material, of a toughened polymer,B) from 1 to 20% by weight, based on the total weight of the molding material, of a blend ofB.sub.1) a copolymer comprising polymerized units which are derived from a polymerizable carboxylic acid or derivatives thereof andB.sub.2) a polyamide,C) from 0 to 40% by weight of a fibrous or particulate filler or of a mixture thereof andD) from 0 to 20% by weight of conventional additives and processing assistants.

Abstract: Thermoplastic molding materials containA) from 4 to 95% by weight of a semicrystalline, partly aromatic copolyamide composed ofa.sub.1) from 30 to 44 mol % of units which are derived from terephthalic acid,a.sub.2) from 6 to 20 mol % of units which are derived from isophthalic acid,a.sub.3) from 43 to 49.5 mol % of units which are derived from hexamethylenediamine anda.sub.4) from 0.5 to 7 mol % of units which are derived from aliphatic cyclic diamines of 6 to 30 carbon atoms,the molar percentages of components a.sub.1) to a.sub.4) together giving 100%, andB) from 4 to 95% by weight of a polyolefin homo- or copolymer or a mixture thereof,C) from 1 to 20% by weight of a compatibilizer,D) from 0 to 20% by weight of an elastomeric polymer,E) from 0 to 50% by weight of a fibrous or particulate filler andF) from 0 to 30% by weight of conventional additives and processing assistants,the percentages by weight of components A to F together giving 100%.

Abstract: Thermoplastic molding materials containA) from 50 to 99% by weight, based on the total weight of the molding material, of a toughened polymer,B) from 1 to 20% by weight, based on the total weight of the molding material, of a blend ofB.sub.1) a copolymer comprising polymerized units which are derived from a polymerizable carboxylic acid or derivatives thereof andB.sub.2) a polyamide,C) from 0 to 40% by weight of a fibrous or particulate filler or of a mixture thereof andD) from 0 to 20% by weight of conventional additives and processing assistants.

Abstract: Thermoplastic molding materials containA) from 1 to 99% by weight of a partly aromatic copolyamide composed ofa.sub.1) from 30 to 44 mol % of units which are derived from terephthalic acid,a.sub.2) from 6 to 25 mol % of units which are derived from isophthalic acid,a.sub.3) from 43 to 49.5 mol % of units which are derived from hexamethylenediamine anda.sub.4) from 0.5 to 7 mol % of units which are derived from aliphatic cyclic diamines of 6 to 30 carbon atoms,the molar percentages of components a.sub.1) to a.sub.4) together giving 100%,B) from 1 to 99% by weight of an aromatic polycarbonate,C) from 0 to 30% by weight of a polymeric component having OH groups,D) from 0 to 60% by weight of fibrous or particulate fillers or of a mixture thereof,E) from 0 to 40% by weight of rubber impact modifiers andF) from 0 to 40% by weight of conventional additives and processing assistants.

Abstract: Thermoplastic molding materials containA) from 1 to 99% by weight of a partly aromatic copolyamide composed ofa.sub.1) from 30 to 44 mol % of units which are derived from terephthalic acid,a.sub.2) from 6 to 25 mol % of units which are derived from isophthalic acid,a.sub.3) from 43 to 49.5 mol % of units which are derived from hexamethylenediamine anda.sub.4) from 0.5 to 7 mol % of units which are derived from aliphatic cyclic diamines of 6 to 30 carbon atoms,the molar percentages of components a.sub.1) to a.sub.4) together giving 100%,B) from 1 to 99% by weight of a polyetherimide,C) from 0 to 30% by weight of a polymeric component having OH groups,D) from 0 to 60% by weight of fibrous or particulate fillers or mixtures thereof,E) from 0 to 40% by weight of rubber impact modifiers andF) from 0 to 40% by weight of conventional additives and processing assistants.