Patent · US Expired

Permanently stabilized polyurethanes

US4178279A · kind A · utility

18Cited by

4References

9Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Paul Uhrhan
Harald Oertel · Odenthal, DE
Reinhard Lantzsch · Leverkusen, DE
Ernst Roos
Dieter Arlt · Cologne, DE

Key dates

Filing date	Sep 19, 1977
Grant date	Dec 11, 1979
Priority date	—
Expiry date	Sep 19, 1997

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G18/10
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention is related to modified polyurethanes which have a permanent, wash-fast, acidresistant, dry cleaning-resistant and solvent-resistant stabilization based on 2,2,6,6-tetraalkyl-piperidine light protective agents. These stabilizers are an integral constituent of the polyurethanes, that is to say they take part in the polyurethane synthesis by the reaction of an H-active reactive group (for example NH.sub.2, NH-alkyl, CO--NH--NH.sub.2, NH--CO--NH--NH.sub.2, OH or some other H-active group) of the 2,2,6,6-tetraalkyl-piperidine derivatives with isocyanate groups of polyisocyanates or isocyanate prepolymers.

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