Rubber-based impact-resistance improver and a process of producing such an impact-resistance improver.

摘要

The invention accords to a new rubber-based impactresistance improver which at least consists of (a) 10 parts by weight of carboxylated rubber, (b) 0 - 25 parts by weight of uncarboxylated rubber, and (c) 1 - 20 parts by weight of a copolymer at least consisting of vinyl alcohol groups and vinyl chloride groups in a molar ratio of between 1 : 5 and 1 : 50 and a process for preparing such an impact-resistance improver. The impact-resistance improver according to the invention is extremely suitable for improvement of the impact-resistance of vinyl chloride homo- and copolymers containing at least 70 mol % vinyl chloride units and can be employed also in other polymers, e.g in ABS, SAN and polyvinylidine chloride.