Patent · US Expired

Acrylonitrile copolymers having low residual monomer content and methods for their preparation

US4241203A · kind A · utility

6Cited by

4References

3Claims

0Family size

Assignee

Rohm Co., Ltd. · JP

Inventors

Franz Wenzel · Darmstadt, DE
Heinz-Dieter Bruemmer · Seeheim-Jugenheim, DE
Manfred Krieg · Darmstadt, DE

Key dates

Filing date	Jan 24, 1979
Grant date	Dec 23, 1980
Priority date	—
Expiry date	Jan 24, 1999

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F220/44
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

What is disclosed are copolymers predominantly containing acrylonitrile and having a very low residual monomer content, for example of less than 100 ppm, the method of making such copolymers by polymerization to at least 60 percent conversion followed by post-heating at a temperature of more than 130.degree. C., and the use of such copolymers in orthopedic devices which come into direct contact with the skin.

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