Patent · US Expired

Stabilization of copolymers of maleic acid or maleic anhydride and vinyl alkyl ethers

US6008274A · kind A · utility

4Cited by

6References

2Claims

0Family size

Assignee

BASF SE

Inventors

Harald Meyer · Monsheim, DE
Axel Sanner · Bischofswerda, DE
Franz Frosch · Bad Dürkheim, DE
Hans J. Richter · Marktoberdorf, DE

Key dates

Filing date	Sep 30, 1994
Grant date	Dec 28, 1999
Priority date	—
Expiry date	Sep 30, 2014

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08K5/1535
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process for stabilizing a copolymer of maleic acid or maleic anhydride and vinyl alkyl ethers against a reduction in molecular weight in aqueous solution or in the solution of an organic solvent by adding 0.001 to 10% by weight, based on the copolymer, of a reducing agent, a tert-butyl-containing phenol or a mixture thereof.

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