Patent ID: 6140426
Filing Date: 2000-10-31
Classification: C08K,C08L

Abstract:
Thermoplastic moulding compositions of the ABS type, consisting essentially ofA) 5 to 95% by weight of at least one thermoplastic homo-, co- or terpolymer of styrene, .alpha.-methylstyrene, acrylonitrile, N-substituted maleinimide or mixtures thereof,B) 5 to 95% by weight of at least one graft polymer ofB.1) 5 to 90 parts by weight of styrene, .alpha.-methylstyrene, acrylonitrile, N-substituted maleinimide or mixtures thereof, onB.2) 95 to 10 parts by weight of a rubber with a glass transition temperature .ltoreq.0.degree. C., andC) 1 to 10 parts by weight (per 100 parts by weight of A+B), of at least one additive selected from the group consisting of internal lubricants, anti-static agents, demoulding agents or mixtures thereof,characterised in that component A) is produced by bulk, solution or suspension polymerisation and has an oligomer content .ltoreq.1% by weight, component B) is produced by emulsion polymerisation, the total oligomer content of the moulding compositions is .ltoreq.0.8% by weight, and the ratio of the molecular weight of the additive to the amount of additive in the moulding composition (in % by weight) does not fall below a value of 150.