Electro coat/base coat/clear coat finishes stabilized with soluble and thermally stable benzotriazole UV absorbers
US5563242A · kind A · utility
26Cited by
12References
13Claims
0Family size
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Key dates
| Filing date | Jun 6, 1995 |
| Grant date | Oct 8, 1996 |
| Priority date | — |
| Expiry date | Jun 6, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/8155
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Soluble and thermally stable benzotriazole UV absorbers typified by those of formula I ##STR1## where R.sub.1 is hydrogen or chloro, R.sub.2 is alkyl or --CH.sub.2 CH.sub.2 COOR.sub.4 where R.sub.4 is hydrogen, alkyl or alkyl substituted with hydroxyl, and R.sub.3 is .alpha.-cumyl, provide excellent light stability protection to electro coat, base coat or clear coat finishes. The new soluble, crystalline form of 2-(2-hydroxy-3-.alpha.-cumyl-5-tert-octylphenyl)-2H-benzotriazole is particularly effective.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.