Patent · US Expired

Textile coating with polyurethanes

US4116741A · kind A · utility

18Cited by

5References

1Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Wilhelm Thoma · Leverkusen, DE
Jochen Wulff · Hilden, DE
Georg Niederdellmann · Dormagen, DE

Key dates

Filing date	Jan 20, 1975
Grant date	Sep 26, 1978
Priority date	—
Expiry date	Jan 20, 1995

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31554
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

This application relates to textile sheets which have been coated with polyurethanes and to a process for coating said textile sheets wherein a solution of polyurethane is applied as a top coat to a release substrate and then a bonding coat is applied before application of the textile material. The polyurethane which is used as a top coat is prepared by reacting a dihydroxyl compound with a molecular weight between about 600 and 4000 and a mixture of at least 2 diols with a molecular weight between 62 and 450 with at least one organic diisocyanate. The invention overcomes the difficulty of the top coat being lifted from the release substrate in numerous areas while other areas remain firmly attached giving the so-called "hoar-frost" effect.

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