Patent · US Expired

Crosslinking agents for water-swellable polymers

US4522997A · kind A · utility

10Cited by

1References

7Claims

0Family size

Assignee

Cassella Aktiengesellschaft · DE

Inventors

Hermann Schmitz
Klaus Kuhlein · Kelkheim, DE

Key dates

Filing date	Jun 6, 1983
Grant date	Jun 11, 1985
Priority date	—
Expiry date	Jun 6, 2003

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08K5/3415
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Crosslinked, water-swellable copolymers are produced with a crosslinking agent comprising an N-(2'alkenyl)-3-methylenepyrrolidin-2-one of the formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are the same or different and each is hydrogen or alkyl having 1 to 6 carbon atoms.

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