Patent · US Expired

Modified polyvinyl alcohol and its use as a sizing agent

US4401836A · kind A · utility

2Cited by

2References

4Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Friedrich Engelhardt · Frankfurt, DE
Rolf Kleber · Neu-Isenburg, DE

Key dates

Filing date	Mar 8, 1982
Grant date	Aug 30, 1983
Priority date	—
Expiry date	Mar 8, 2002

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F8/34
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Polyvinyl alcohol modified by reaction with formaldehyde and amidosulfonic acid at a pH value of 4 to 7, which value is established by the addition of an organic amine. This modified polyvinyl alcohol is suitable for use as a sizing agent for yarns.

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