Patent · US Expired

Water-soluble polymers having a low hygroscopicity

US4551512A · kind A · utility

9Cited by

6References

2Claims

0Family size

Assignee

BASF SE

Inventors

Ferdinand Straub · Hockenheim, DE
Axel Sanner · Bischofswerda, DE
Karl Seib · Weinheim, DE
Siegfried Lang · Ludwigshafen, DE

Key dates

Filing date	Apr 6, 1984
Grant date	Nov 5, 1985
Priority date	—
Expiry date	Apr 6, 2004

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F226/10
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

Readily water-soluble, slightly hygroscopic terpolymers which consist of PA1 (a) from 10 to 40% by weight of vinylpyrrolidone, PA1 (b) from 20 to 50% by weight of vinyl acetate (VAc) or vinyl propionate and PA1 (c) from 10 to 40% by weight of hydroxyethyl acrylate, hydroxypropyl acrylate or hydroxyethyl methacrylate, which terpolymers are used as auxiliaries in the cosmetics and pharmaceuticals sectors.

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