U.V. stabilized article
US5110626A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1989 |
| Grant date | May 5, 1992 |
| Priority date | — |
| Expiry date | Jun 29, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J7/065
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
What is described herein is a surface modified U.V. stabilized article which includes a resinous sheet whose sides are both exposed to the air. The surface region of one side of the sheet is substantially fully modified in situ with a stabilizing amount of an ultraviolet light stabilizer material, while the exposed surfaces are substantially free of residual stabilizer and solvent material, and the appearance and degree of surface perfection of the modified side are substantially the same as that of the unmodified side of the sheet. The U.V. stabilized resin article is made by a continuous process comprising immersing a resin body in a suitable liquid media, contacting the surface of the immersed body through the liquid with a solution of a ultraviolet light stabilizer in a suitable organic solvent, and displacing residual stabilizer and solvent from the modified surface in situ.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.