Patent · US Expired

Coating layer with self-repairing properties for panes exposed to atmospheric agents

US4657796A · kind A · utility

52Cited by

1References

8Claims

0Family size

Assignee

Saint-Gobain Vitrage · FR

Inventors

Ingrid Musil · Aachen, DE
Gerhard Holzer · Aachen, DE
Helmer Raedisch

Key dates

Filing date	Dec 6, 1985
Grant date	Apr 14, 1987
Priority date	—
Expiry date	Dec 6, 2005

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31598
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A polyurethane coating layer, with self-repairing properties, for panes made of glass and/or plastic materials, which are exposed to atmospheric agents. The coating layer according to the invention is formed from a reactive mixture of a trifunctional isocyanate component such as the biurets or isocyanurates of 1,6 hexamethylenediisocyanate, having a content of about 15 to 25% by weight of NCO radicals and a polyalcohol component chosen from the plurifunctional polyester polyalcohols having about a 3 to 12% by weight content of OH radicals.

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