Polymer bound hindered amine light stabilizers
US4857595A · kind A · utility
43Cited by
37References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 12, 1987 |
| Grant date | Aug 15, 1989 |
| Priority date | — |
| Expiry date | Aug 12, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/30
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polymer bound hindered amine light stabilizers are prepared by reacting hindered amine light stabilizers containing reactive hydrazide functionalities with anhydride containing polymers or copolymers. The reactions may be carried out in an inert solvent or in a melt blending step. The polymer bound hindered amine light stabilizers are useful alone or may also be used to stabilize other polymers, copolymers or polymer blends against the deleterious effects of heat and/or light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.