公开(公告)号：US20180066117A1

公开(公告)日：2018-03-08

申请号：US15560312

申请日：2016-03-23

Applicant: INEOS STYROLUTION GROUP GMBH

Inventor： Brian J. BANASZAK ,  Roland WALKER ,  Libor SEDA ,  Johannes BARTH ,  Gisbert MICHELS ,  Nikolaus NESTLE

IPC: C08J3/24 ,  C08F2/26 ,  C08F2/38 ,  C08F279/04 ,  C08L25/12 ,  C08L55/02

CPC classification number: C08J3/24 ,  C08F2/26 ,  C08F2/38 ,  C08F279/04 ,  C08J2300/22 ,  C08L25/12 ,  C08L55/02 ,  G01R33/46 ,  C08F220/44 ,  C08F212/08

Abstract: A process produces a polymer composition (A) containing a styrene copolymer (a) and an impact modifier (b), comprising a copolymer (b1) as graft base and a graft (b2), where the steps of the process are: (1) providing a crosslinked copolymer (b1) made of: (b11) from 70 to 99.99% by weight of a conjugated diene or acrylate, (b12) from 0 to 29% by weight of another comonomer, (b13) from 0 to 10% by weight of crosslinking monomers, and (b14) from 0.01 to 0.7% by weight of a chain-transfer reagent; (2) applying, to the copolymer (b1), at least one graft (b2) comprising: (b21) from 65 to 95% by weight of a vinylaromatic monomer, (b22) from 5 to 35% by weight of acrylonitrile and/or methacrylonitrile, and (b23) from 0 to 30% by weight of monoethylenically unsaturated monomers, thus providing the impact modifier (b); (3) mixing the styrene copolymer (a) and the impact modifier (b), and thus leads to improved mechanical properties of the polymer composition (A).