Ultra violet absorber
US4028331A · kind A · utility
12Cited by
13References
9Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Feb 4, 1975 |
| Grant date | Jun 7, 1977 |
| Priority date | — |
| Expiry date | Feb 4, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/3475
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A ultraviolet of absorber containing 2-(2',4'-dihydroxyphenyl)-5-chlorobenzotriazole is effectively used to stabilize polyurethane resins against ultraviolet rays.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.