Multilayer, UV-radiation stabilized polycarbonate panel
US5098790A · kind A · utility
12Cited by
1References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 7, 1989 |
| Grant date | Mar 24, 1992 |
| Priority date | — |
| Expiry date | Sep 7, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31533
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Synthetic resin panel consisting of a core layer (1) of polycarbonate resin covered on at least one of its outer sides by a storage layer (2) containing between 5 and 15% by weight of an UV absorber, and on that side of said storage layer facing away from said core layer, by a cover layer (3) of synthetic resin containing an UV absorber, wherein said UV absorber, incorporated in said cover layer (3), different from said UV absorber incorporated in said storage layer (2), is of low volatility and is present at a concentration exceeding 2% by weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.