Patent · US Expired

Plasticizer containing polyvinylbutyral sheets having a reduced adhesion to glass

US4161565A · kind A · utility

8Cited by

7References

5Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Hans D. Hermann · Bad Soden am Taunus, DE
Joachim Ebigt

Key dates

Filing date	Oct 12, 1977
Grant date	Jul 17, 1979
Priority date	—
Expiry date	Oct 12, 1997

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09D129/14
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

Plasticizer containing polyvinylbutyral sheets are known intermediate layers for glass laminates. Generally, the polyvinylbutyral used for this application contains certain amounts of vinyl alcohol units and vinyl acetate units. In order to adjust an optimum adhesion to glass, certain additives are mixed with the polyvinylbutyral, which additives must not cause discoloration of the laminate and deterioration of the transparency. Betains are especially suitable anti-adhesives, and efficient in very small amounts.

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