Patent · US Expired

Transparent coating of flexible, elastic polyurethane for transparent glass or synthetic resin substrates

US4745152A · kind A · utility

29Cited by

1References

15Claims

0Family size

Assignee

Saint-Gobain Vitrage · FR

Inventors

Juergen Fock · Goldkronach, DE
Günter Hähn · Rübhausen, DE
Gerhard Holzer · Aachen, DE
Helmer Radisch · Aachen, DE

Key dates

Filing date	Feb 20, 1987
Grant date	May 17, 1988
Priority date	—
Expiry date	Feb 20, 2007

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G18/792
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A transparent coating for windows or other transparent substrates made of glass or synthetic resin, consisting of a flexible elastic polyurethane, serves as a shatterproofing coating for substrates made of silicate glass or as a coating improving the scratch resistance of substrates made of synthetic resin. To reduce or prevent the formation of a deposit of moisture on the surface of the coating, the polyol component of the reaction mixture for preparing a coating pursuant to the invention consists of a difunctional sulfonated polyether polyol containing approximately 1 to 10% of OH groups by weight and a trifunctional polyol containing approximately 8 to 12% of OH groups by weight and having an average molecular weight of approximately 400 to approximately 1000 g/mole.

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