Stabilization of fluorescent dyes in vinyl articles using hindered amine light stabilizers
US6406798B2 · kind B2 · utility
7Cited by
11References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2000 |
| Grant date | Jun 18, 2002 |
| Priority date | — |
| Expiry date | Jun 14, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/676
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A durable colored article having fluorescent properties comprises a substantially solventless polyvinyl chloride matrix, a thioxanthene fluorescent dye, and a secondary or tertiary hindered amine light stabilizer having a molecular weight less than about 1000 grams/mole. The invention has the advantage in that it provides a flexible polyvinyl chloride film that exhibits durable fluorescent colors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.