Process for producing a graft polymer
US4154778A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 1978 |
| Grant date | May 15, 1979 |
| Priority date | — |
| Expiry date | Apr 27, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F285/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for producing a graft polymer possessing a low gas-permeability and an excellent impact resistance and thermal stability which comprises the steps of: PA1 First graft-polymerizing in emulsion 5 to 40 parts by weight of (A) a monomeric mixture comprising 30 to 70% by weight of acrylonitrile and 30 to 70% by weight of at least one acrylic ester having the following formula: EQU CH.sub.2 .dbd.CHCOOR.sub.1 PA1 wherein R.sub.1 represents an alkyl group having from 1 to 4 carbon atoms, in the presence of 2 to 30 parts by weight of (B) a trunk copolymer prepared by copolymerizing 50 to 90% by weight of 1,3-butadiene, 10 to 50% by weight of at least one acrylic or methacrylic ester having the following formula: EQU CH.sub.2 .dbd.CR.sub.3 COOR.sub.2 PA1 wherein R.sub.2 represents an alkyl group having from 1 to 8 carbon atoms and R.sub.3 represents a hydrogen atom or a methyl group, and 0 to 15% by weight of styrene to form a first branch polymer; and then PA1 Graft-polymerizing in emulsion 40 to 90 parts by weight of (C) a monomeric mixture comprising 50 to 85% by weight of acrylonitrile and 15 to 50% by weight of at least one acrylic ester having the following formula: EQU CH.su…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.