摘要:
The use of a thermoplastic molding composition differing from ABS and comprising, based on a total of 100% by weight of amounts of components A and B, and, if desired, C and/or D,a: as component A, from 1 to 99% by weight, preferably from 15 to 60% by weight, in particular from 25 to 50% by weight, of a particulate emulsion polymer with a glass transition temperature of below 0.degree. C. and with a median particle size of from 50 to 1000 nm, preferably from 50 to 500 nm,b: as component B, from 1 to 99% by weight, preferably from 40 to 85% by weight, in particular from 50 to 75% by weight, of at least one amorphous or partly crystalline polymer,c: as component C, from 0 to 50% by weight of polycarbonates, andd: as component D, from 0 to 50% by weight of fibrous or particulate fillers or mixtures of thesefor producing covering grid plates for ventilator openings.
摘要:
Transparent molded articles having a high-contrast laser inscription thereon are produced from a polymer mixture consisting ofA) from 40 to 99% by weight of a polymer of an alkyl ester of (meth)acrylic acid,B) from 1 to 50% by weight of a copolymer of styrene and acrylonitrile having an acrylonitrile content of from 8 to 30% by weight,C) from 0 to 50% by weight of rubber particles, andD) from 0 to 20% by weight of additives and processing auxiliaries, by preparing a transparent molded article from the polymer mixture, and exposing the transparent molded article to laser radiation.
摘要:
A process is proposed for coagulation of an aqueous polymer dispersion, which comprises, during or after the coagulation, converting the dissolved coagulation salt into an insoluble form.
摘要:
The graft copolymer made from a1: from 10 to 90% by weight of a particulate graft base A1, made from a particulate emulsion polymer with a glass transition temperature below 0° C. made from a11: from 70 to 100% by weight of butadiene or of at least one C1-8-alkyl acrylate, or of mixtures of these, as component A11, a12: from 0 to 20% by weight of at least one polyfunctional crosslinking monomer, as component A12, a13: from 0 to 30% by weight of other copolymerizable monomers, as component A13, the total amount of these being 100% by weight, a2: from 10 to 90% by weight of a graft A2 made from the following monomers, the amounts being based on A2, a21: from 60 to 100% by weight of at least one vinylaromatic monomer, or of a (meth)acrylic ester or of mixtures of these, as component A21, and a22: from 0 to 40% by weight of at least one ethylenically unsaturated monomer, as component A22, has a median particle diameter of from 130 to 500 nm and has polymodal particle size distribution in which less than 40% by weight of the particles are present in any particle size range of width 50 nm.
摘要:
The thermoplastic molding compositions proposed comprise A) from 20 to 90% by weight, preferably from 30 to 80% by weight, particularly preferably from 40 to 75% by weight, of a thermoplastic polymer, and B) from 10 to 80% by weight, preferably from 20 to 70% by weight, particularly preferably from 25 to 60% by weight, of a crosslinked rubber having two or more phases, where the polymer A has a viscosity number, measured on a 0.5% strength solution in dimethylformamide at 23° C., of from 50 to 70 ml/g, preferably from 55 to 65 ml/g, and where at least 80% by number, preferably at least 85% by number, particularly preferably at least 90% by number, of the rubber particles B in the dispersion, after the preparation thereof, have a diameter of
摘要:
The present invention relates to molding compositions comprising polycondensates, particulate graft copolymers, copolymer made from vinylaromatic monomer and acrylonitrile and/or methacrylonitrile, fibers, polycarbonate, carbon black and customary additives. Moldings and composites made from this molding composition are described as are recycled materials from these, and the use of the molding compositions, moldings, composites and recycled materials.
摘要:
Preparation of rubber-modified molding compositions comprises a1) anionic polymerization of a mixture (A) comprising acrylate derivatives or methacrylate derivatives or acrylate derivatives and methacrylate derivatives and a solvent, if desired comprising olefinically unsaturated compounds which are not an acrylate derivative or a methacrylate derivative, or a2) sequential anionic polymerization of acrylate derivatives or methacrylate derivatives or acrylate derivatives and methacrylate derivatives in the presence of a solvent which, if desired, comprises olefinically unsaturated compounds to give block copolymers, and b) subjecting the reaction mixture obtained in a1) or a2) or a1) and a2) to a free-radical-initiated polymerization, if desired after the addition of unsaturated compounds.
摘要:
Molding materials (F) which are suitable for the production of shaped articles having reduced surface gloss and are based on polymers or polymer blends (P), preferably ASA polymers and/or styrene/acrylonitrile copolymers, contain a sufficient amount of a dull graft copolymer (A) admixed as dulling agent, which was prepared by one-stage or multistage graft copolymerization of monomers forming the hard shell onto an elastomeric acrylate polymer, the graft copolymerization being carried out to a conversion of more than 15% by thermal or free radical mass or solution polymerization.
摘要:
Compounds of the general formula (I):H(--CH.sub.2 --CR.sup.1 R.sup.2).sub.m (--CH.sub.2 --CR.sup.1 R.sup.3).sub.n --H (I)whereR.sup.1 is H or methyl,R.sup.2 is --C(O)--Y--R.sup.4, where R.sup.4 is H, methyl, ethyl or allyl,R.sup.3 is --C(O)--Y--allyl andY is O or NH,orR.sup.1 is H or C.sub.1 -C.sub.20 -alkyl,R.sup.2 is H andR.sup.3 is (--CH.sub.2 --CR.sup.5 .dbd.CR.sup.6 --CH.sub.2).sub.p --H, where R.sup.5 and R.sup.6 independently are each H,methyl, ethyl or chlorine and p is 1-100,orR.sup.1 is H,R.sup.2 is OH or O-allyl andR.sup.3 is O-allyl,orR.sup.1 is H,R.sup.2 is OH or R.sup.3 andR.sup.3 is (meth)acrylate, --O--C(O)--CH.dbd.CH--COOH or --O--C(O)--CH.sub.2 --C(.dbd.CH.sub.2)--COOH,and m is an integer from 5 to 500,000 and n is an integer from 2 to 100,000, are used as crosslinking agents in particulate emulsion polymers having a glass transition temperature below 0.degree. C. and a mean particle size of from 50 to 1000 nm.