Styrene- acrylonitrile copolymers blended with graft copolymers of styrene onto butadiene-alkyl acrylate-vinyl alkyl ether terpolymers

摘要

Composition comprises (I) a graft copolymer consisting of (A) a copolymer of 30 to 77 weight % butylacrylate and/or ethylhexylacrylate, 20 to 40% butadiene and 3 to 30% of a vinylalkylether having 1 to 8C atoms in the alkyl residue; the copolymer having been produced by copolymerisation in aqueous emulsion; having grafted thereon (B) 10 to 50 weight % with respect to (A) of styrene or a styrene/acrylonitrile mixture containing up to 30% acrylonitrile; and (II) a 60:40 to 90:10 styrene/acrylonitrile copolymer; the total composition containing 10 to 35% with respect to solid content of the total composition, of component (A); said composition being characterised in that it also contains 0.1 to 5 weight % of 4,4'-diaminodiphenylmethane homogeneously distributed therein.