Polychromophoric heterocyclic ultraviolet stabilizers
US4029670A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1975 |
| Grant date | Jun 14, 1977 |
| Priority date | — |
| Expiry date | Sep 19, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/3475
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to bichromophoric heterocyclic ester compounds which have been found to be effective ultraviolet stabilizers. The invention also relates to ultraviolet degradable organic compositions containing a stabilizing amount of these bichromophoric heterocyclic ester compositions to prevent such degradation. These stabilizers are effective in the presence of other additives commonly employed in polymeric compositions including, for example, pigments, colorants, fillers, reinforcing agents and the like. These ultraviolet stabilizers may also be incorporated into the organic compositions in the polymer melt or dissolved in the polymer dope, coated on the exterior of the molded article, film or extruded fiber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.