Patent · US Active

PVB film with low-migration UV protection

US9604433B2 · kind B2 · utility

0Cited by

5References

12Claims

0Family size

Assignee

Kuraray Europe GmbH · DE

Inventors

Philipp Lellig · Troisdorf, DE
Uwe Keller · Avon, FR

Key dates

Filing date	Apr 16, 2015
Grant date	Mar 28, 2017
Priority date	—
Expiry date	Jul 15, 2035

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/3163
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

Polyvinylacetal films exhibiting high UV absorbance, freedom from cloudiness, and low tendency for UV stabilizer migration use, as a UV absorber, one or more UV absorbers of the formulae (1a), (1b), (2) or (3) in films formed from plasticizer-containing polyvinyl acetal

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