Antistatic Thermoplastic Moulding Compositions based on ABS-Polymers

摘要

1,178,359. Graft polymer compositions. FARBENFARBRIKEN BAYER A.G. 18 June, 1968 [22 June, 1967], No. 28992/68. Heading C3G. A moulding composition having antistatic properties comprises (A) 4 to 99-5% by weight of a graft copolymer of (a) 10 to 95% of a mixture of (1) 50 to 90% of styrene or an alkyl derivative thereof and (2) 50 to 10% of acrylonitrile or an alkyl derivative thereof, on (b) 90 to 5% of a polymer containing at least 70% of a conjugated diolefin, as graft base; (B) 0 to 95-5% of a copolymer of (a) 50 to 95% of styrene or an alkyl derivative thereof and (b) 50 to 5% of acrylonitrile or an alkyl derivative thereof, the sum total of acrylonitrile, styrene and alkyl derivatives thereof in components (A) and (B) not exceeding 50%; and (C) 0-5 to 6% of a mixture comprising (a) 1 to 10 parts by weight of a dialkanolalkylamine of the general structure in which R 1 represents a linear or branched alkyl radical with from 8 to 20 carbon atoms, R 2 and R 3 each represent a hydrogen atom or methyl group and m and n each represent an integer of from I to 20 and (b) 10 to 1 parts of an alkyl or alkaryl sulphonate with from 6 to 20 carbon atoms in the alkyl chain, which may be linear or branched. The mixture (C) may be incorporated with a dry powder of components (A) and (B), or the sulphonate constituent may be incorporated as an emulsifier in the preparation of component (A) and/or (B), in which case the amine is added to the latices of (A) and (B) or to a coagulate thereof. Specified amines are n-dodecyl, iso-dodecyi, tetradecyi, pentadecyl and isopentadecyl diethanolamines. In the compositions exemplified, the components are selected from (A) a graft polymer of styrene and acrylonitrile on polybutadiene or a butadiene-styrene elastomer, (B) a styrene-acrylonitrile or alpha-methyl styrene/acrylonitrile copolymer and (C) (a) pentadecyl diethanolamine, octadecyl diisopropanolamine or dodecyl diisopropanolamine and (b) a C 15 -linear alkyl sulphonate, n-dodecy]- benzene sulphonate, a C 12 -linear alkyl sulphonate or a C 15 -branched alkyl sulphonate.