Patent · US Expired

Transparent coating layer with self-repairng and fog-resistant properties which can be utilized on panes

US4684694A · kind A · utility

10Cited by

5References

17Claims

0Family size

Assignee

Saint-Gobain Vitrage · FR

Inventors

Kornelia Breuer · Aldenhoven, DE
Udo Gelderie · Stolberg, DE
Gerhard Holzer · Aachen, DE
Helmer Raedisch

Key dates

Filing date	Dec 6, 1985
Grant date	Aug 4, 1987
Priority date	—
Expiry date	Dec 6, 2005

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB32B2375/00
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A high optical quality polyurethane coating layer, with self-repairing and fog-resistant properties, utilized for panes made of glass and/or plastic materials. The layer is formed from a reactive mixture composed 10 to 75% by weight of a biuret or an isocyanurate of 1,6 hexamethylenediisocyanate, having a content of about 15 to 25% weight of NCO radicals and having an average molecular weight between about 450 and 850 and comprised about 90 to 25% by weight of a polyalcohol component essentially comprised of a plurifunctional polyalcohol having about 0.4 to 17% of its percentage weight comprised of OH radicals, and having a molecular weight between about 200 and 15,000, and having ethoxy-propoxy chains, comprised 50 to 90% by weight of ethoxy radicals and 50 to 10% by weight of propoxy radicals.

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