Patent · US Expired

Process for emulsion polymerization of graft copolymers

US5187233A · kind A · utility

4Cited by

2References

21Claims

0Family size

Assignee

Wacker Chemie AG · DE

Inventors

Peter Ball · Emmerting, DE
Josef F. Christ · Burghausen, DE
Albin Frank · Burghausen, DE
Klaus Marquardt · Burghausen, DE
Manfred Selig · Burghausen, DE

Key dates

Filing date	Mar 8, 1990
Grant date	Feb 16, 1993
Priority date	—
Expiry date	Mar 8, 2010

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F255/026
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

A process is provided for the production of a graft copolymer by means of emulsion polymerization. The graft base used is a sulfonate group-containing vinyl ester/ethylene latex which is stabilized exclusively by an anionic emulsifier (CMC.gtoreq.0.5% by weight in H.sub.2 O) and is grafted, preferably with vinyl chloride, without further addition of emulsifier or protective colloid. The graft copolymers according to the invention have good water resistance and very good thermoplastic processability. They are useful as impact modifiers and for the production of articles, such as, soft to semi-hard moldings.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.