Patent · US Expired

Terpolymers, use thereof in hair setting compositions for increased stiffness, and hair setting compositions containing same

US5196188A · kind A · utility

11Cited by

5References

9Claims

0Family size

Assignee

BASF SE

Inventors

Birgit Potthoff-Karl · Weinheim, DE
Karin Sperling-Vietmeier · Neustadt, DE
Franz Frosch · Bad Dürkheim, DE
Axel Sanner · Bischofswerda, DE

Key dates

Filing date	Sep 20, 1991
Grant date	Mar 23, 1993
Priority date	—
Expiry date	Sep 20, 2011

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S424/02
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

A terpolymer suitable for use as a film former in hair setting compositions is obtainable by free radical polymerization of 10%-24% by weight of N-vinylpyrrolidone, 46%-74% by weight of tert-butyl acrylate or methacrylate and 16%-30% by weight of acrylic or methacrylic acid, whose carboxyl groups may be partially or completely neutralized with an organic amine, ammonia or a basic alkali metal compound and which has a K value of from 25 to 65.

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