Patent · US Expired

Water-soluble branched polyesters

US4167395A · kind A · utility

30Cited by

5References

11Claims

0Family size

Assignee

Cassella Aktiengesellschaft · DE

Inventors

Friedrich Engelhardt · Frankfurt, DE
Karl Hintermeier · Frankfurt am Main, DE
Joachim Ribka · Offenbach am Main, DE
Helmut Beutler · Kelkheim, DE

Key dates

Filing date	May 12, 1977
Grant date	Sep 11, 1979
Priority date	—
Expiry date	May 12, 1997

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S8/922
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

Water-soluble polyester having an apparent molecular weight between about 600 and about 5,000 and a SO.sub.3 M group content between about 5 to about 40 mol percent based on the number of mols of dicarboxylic and/or polycarboxylic acids esterified in the polyester, and an at least trifunctional alcohol and/or an at least trifunctional carboxylic acid content between about 1 to about 40 mol percent based on the number of mols of dicarboxylic and/or polycarboxylic acids esterified in the polyester so that the polyester is correspondingly branched and M denotes a cation of an alkali metal, the ammonium ion or the cationic radical of an organic amine. The improved polyester is particularly suited as a levelling agent in the disperse dyeing of polyester fibers or the like.

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