UV-stabilized polymeric structures
US6265072A · kind A · utility
16Cited by
10References
27Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 27, 1999 |
| Grant date | Jul 24, 2001 |
| Priority date | — |
| Expiry date | Apr 27, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31507
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Weatherable multi-layer structures that are ultraviolet stabilized contain a substrate layer of a polymer which degrades upon exposure to UV radiation and at least one ultraviolet protective layer based on a 2,2,4,4-tetramethyl-1,3-cyclobutanediol-based polycarbonate and an effective level of an ultraviolet absorbing compound. The UV absorbing compound is a benzotriazole, a dimeric benzotriazole, a triazine, a benzoxazinone, or a diphenylcyanoarylate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.