| abstract |
FIELD: chemistry. n SUBSTANCE: invention relates to an improved composition for production of vinyl aromatic polymers, modified rubber, where considerable improvement of impact strength of end product is caused by inclusion of a modifying additive structure at different stages of polymerisation, preferably during combined continuous phase and, in particular, on interval treatment phases. Additive is a compound of formula: where each R 1 , R 3 is saturated or unsaturated chain of C 1 -C 18 , where R 1 and R 3 are identical or differ from each other, each of R 2 , R 4 , R 5 denotes hydrogen, halogen or carbonised circuit consisting of C 1 -C 18 , where R 2 , R 4 , R 5 are identical or differ from each other, R 6 denotes a C 2 H 4 group, n is an integer equal to or greater than 1. n EFFECT: significant improvement of impact strength of vinyl aromatic polymers. n 13 cl, 7 dwg, 2 tbl, 3 ex |