摘要:
Free-flowing rubber powders of particles having an average diameter of from 0.01 to 10 mm which contain a grafted-on 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, which rubber is a latex polymer of which the latex particles consist essentially of from 99 to 80% by weight of acrylate rubber having glass transition temperatures below 0.degree. C. and from 1 to 20% by weight of polymer having glass transition temperatures above 0.degree. C. grafted thereon, and a process for their production, wherein the latex of the rubber is completely broken to form an aqueous suspension of the rubber, after which from 2 to 20% by weight, based on the rubber, of one or more vinyl monomers which form polymers having glass transition temperatures above 25.degree. C. are introduced into the suspension and the monomer(s) is/are polymerized, optionally after the addition of a radical-forming catalyst.
摘要:
Optionally reinforced moulding compositions with high impact strength comprising polyamides and graft products of (co)polymers of butadiene and grafted units of methyl(meth)acrylate.
摘要:
A particulate graft polymer comprising (a) a core formed by a crosslinked homopolymer of a conjugated diene or a copolymer thereof with up to 10% by weight of styrene or acrylonitrile; (b) a first shell formed by a crosslinked homopolymer of an acrylic acid alkyl ester or a copolymer thereof with up to 30% by weight of vinyl monomers; (c) a second shell formed by a polymer of resin-forming monomers, a process for manufacturing these graft polymers by means of a multi-stage emulsion polymerization, and their application as molding compositions, optionally together with rigid thermoplastic resins.
摘要:
High impact resistant optionally reinforced moulding compositions consisting of polyamide and a graft product of polybutadiene and grafted units of t-butyl acrylate and an acrylic acid ester with 1-4 C-atoms in the alcoholic moiety.
摘要:
ABS-moulding compositions of (a) 5 to 70% by weight of one or more graft products and (b) 95 to 30% by weight of one or more thermoplastic resins with a content of 0.05 to 1% by weight (based on total moulding composition) of a perfluoroalkane acid or a derivative thereof to improve notched impact strength.
摘要:
A thermoplastic moulding composition which comprises: (A) from 99.99 to 94% by weight of an ABS composition comprising: (a) from 5 to 70% by weight of one or more rubber-based graft polymers; and (b) from 95 to 30% by weight of one or more thermoplastic resins; and (B) from 0.01 to 6.0% by weight of one or more compounds corresponding to the following general formula: ##STR1## wherein R represents hydrogen, C.sub.1 -C.sub.4 -alkyl or carboxyl; R.sup.1 represents hydrogen or methyl; and R.sup.2 represents carboxyl, and which may also contain from 0.1 to 3% by weight of one or more compounds corresponding to the formula: ##STR2##
摘要:
This hybrid circuit breaker has at least two series-connected arcing chambers which are operated by a common drive or by separate drives and are filled with different arc extinguishing media. The arc extinguishing and insulating medium in the first arcing chamber surrounds the second arcing chamber in an insulating manner. The aim is to provide a hybrid circuit breaker which can be produced economically and which has high availability. This is achieved, inter alia, wherein means are provided which always ensure that the movement of the first arcing chamber leads the movement of the second arcing chamber during a disconnection process, and that the movement of the second arcing chamber always leads the movement of the first arcing chamber during a connection process.
摘要:
Moulding compositions comprisingA) from 5 to 95% by weight of a graft product of a mixture of from 50 to 100 parts by weight of styrene, .alpha.-methylstyrene, vinyl toluene, methyl methacrylate or mixtures thereof and from 0 to 50 parts by weight of acrylonitrile on a particulate silicone rubber having an average particle diameter (d.sub.50) of from 0.10 to 0.50 .mu.m with a total rubber content of from 30 to 90% by weight andB) from 95 to 5% by weight of a graft product of a mixture of from 50 to 100 parts by weight of styrene, .alpha.-methylstyrene, vinyl toluene, methyl methacrylate or mixtures thereof and from 0 to 50 parts by weight of acrylonitrile on a particulate EPDM rubber having an average particle diameter (d.sub.50) of from 0.20 to 1.00 .mu.m with a total rubber content of from 10 to 50% by weight.
摘要:
A process for the preparation of polymer combinations having high rubber contents from A) aromatic polyesters and B) at least partially cross-linked rubbers, in which1) an aqueous rubber latex having a rubber solids content of up to 65% by weight is mixed with an aqueous alkali metal diphenolate solution and a water immiscible organic solvent in a quantity of from 10 to 1000 parts by weight per 100 parts by weight of rubber in the latex,2) the mixture obtained according to 1) is reacted with dicarboxylic acid halides and/or carbonyl halides and3) the polymer combination is recovered.