Process for UV stabilizer impregnation of plastic surfaces
US4861664A · kind A · utility
10Cited by
6References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1987 |
| Grant date | Aug 29, 1989 |
| Priority date | — |
| Expiry date | Dec 31, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process of producing a thermoplastic article having resistance to degradation by ultraviolet radiation, which comprises impregnating the surface of the thermoplastic article with a UV-absorbing effective amount of a solution of a multimeric benzotriazole compound at a surface impregnation effective elevated temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.