摘要:
Free-flowing rubber powders containing particles of a diene, acrylate or EPDM rubber having an average diameter of from 0.01 to 10 mm which contain, polymerized thereon, a shell of the polymer or copolymer of one or more vinyl monomers in a quantity of from 2 to 20% by weight, based on the rubber, and a process for their production, wherein a latex of a diene, acrylate or an EPDM rubber having a glass transition temperature of below 0.degree. C. is completely broken with the formation of an aqueous suspension of the rubber, from 2 to 20% by weight, based on the rubber, of one or more vinyl monomers which form polymers having glass transition temperatures of above 25.degree. C. are then introduced into the suspension and the monomer(s) is/are polymerized, optionally after adding radical-forming catalysts.
摘要:
The invention relates to notched impact resistant thermoplastic moulding compositions obtained from1. 1 to 99% by weight, preferably 10 to 95% by weight, especially 70 to 98% by weight, of a thermoplastic vinyl chloride polymer, and2. 99 to 1% by weight, preferably 90 to 5% by weight, especially 2 to 30% by weight, or a particulate graft copolymer consisting of a nucleus (a) of a highly crosslinked diene rubber, a first covering (b) of a crosslinked acrylate rubber, and a second covering (c) of a polymer or copolymer of resin-forming monomers, viz. Styrene, .alpha.-methylstyrene, acrylonitrile, methacrylonitrile, acrylic acid esters and methacrylic acid esters.
摘要:
Stable, free-flowing dispersions in organic liquids of rubbers in the form of discrete particles having an average diameter of from 100 to 3,000 nm which contain: A--as rubber, from 1 to 20% by weight, based on the total dispersion, of a crosslinked diene rubber or a crosslinked, rubber-like acrylate polymer; B--from 0 to 15% by weight, based on the total dispersion, of water in the form of a water-in-oil emulsion; C--as the continuous organic phase, from 99 to 45% by weight, based on the total dispersion, of a mixture of from 95 to 60% by weight of a liquid aliphatic hydrocarbon having up to 20 carbon atoms; or C.sub.6 -C.sub.12 aromatic hydrocarbon or a halogen derivative thereof and from 5 to 40% by weight of a C.sub.1 -C.sub.12 alkanol, a ketone containing up to 8 carbon atoms, a formamide or a nitrile containing up to 6 carbon atoms, and a process for their manufacture.
摘要:
Polycarbonate molding compositions resistant to light aging and exhibiting an improved notched impact strength are disclosed. The compositions which are based on an aromatic polycarbonate, aromatic polyester carbonate or a polyester, contain a redox-catalyzed graft polymer of resin-forming monomers on a rubber, a phosphorus compound and a fluorinated polyolefin.
摘要:
Thermoplastic molding compositions containingA) ABS-type resin,B) aromatic polycarbonate resins,C) a compound bearing several carboxyl groups or mixtures thereof and optionallyD) further polymer resins,characterized in that an ABS resin with at least one basically acting additive is used as component A, component C is selected from compounds having a molecular weight of from 150 to 260 having at least two carboxyl groups (--COOH) in the molecule, and the weight ratio of basically acting additive in A: carboxyl groups in C is from 5:1 to 1:1.
摘要:
A thermoplastic molding composition is disclosed comprising(i) a thermoplastic resin(ii) a low molecular weight additive, and(iii) a specially prepared carrier material magnesium-aluminum-silicate.The carrier material which is characterized by its particle size and low bulk density was found to be effective in minimizing the thermal processing-related evaporation of the low molecular additive.
摘要:
Thermoplastic moulding compounds based on fully aromatic polyester carbonates polyalkylene terephthalates and grafted diene rubber have a well balanced combination of notched impact strength at room temperature and low temperatures and high weld line strength and may be used for the production of moulded articles, in particular by injection moulding.
摘要:
Trialkylsilyloxy-1,1-diphenyl ethylenes corresponding to general formula I, new polymers produced therewith terminated by aryl trialkylsilyl ether groups or by phenolic hydroxyl groups and a process for the production of these polymers by anionic polymerization ##STR1## in which R.sup.1, R.sup.2 .dbd.H, C.sub.1 -C.sub.4 alkyl, OCH.sub.3,R.sup.3 .dbd.H, C.sub.1 -C.sub.4 alkyl, O--C.sub.1 -C.sub.4 alkyl,R.sup.4 .dbd.H, C.sub.1 -C.sub.4 alkyl,R.sup.5 .dbd.C.sub.1 -C.sub.4 alkyl,R.sup.6 .dbd.H, C.sub.1 -C.sub.4 alkyl.
摘要:
The invention relates to powder-form polymer mixtures of silicone resins (B) and thermoplastic polymers (A), to their production and to their use for the modification of thermoplatics.
摘要:
Copolymers of blocks of polymers of cyclic aliphatic carbonates, cyclic aliphatic esters or cyclic aliphatic carbonates and cyclic aliphatic esters on the one hand and blocks of polymers of cyclic aromatic carbonates on the other hand and a process for their production by multistage polymerization, in which a block polymer is initially prepared from the aliphatic monomer and the aromatic polymer is produced in the presence of this block.