Hindered amine-substituted dihydropyridines and heat/light stabilization of polymer substrates therewith
US5124456A · kind A · utility
6Cited by
3References
14Claims
0Family size
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Key dates
| Filing date | Oct 2, 1990 |
| Grant date | Jun 23, 1992 |
| Priority date | — |
| Expiry date | Oct 2, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/3435
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel dihydropyridine compounds bearing substituted piperidyl substituents are effective heat/light stabilizers for a wide variety of polymer substrates, e.g., for halopolymers such as PVC, and are also effective anti-UV agents and antioxidants for such polymers as polyolefins, polystyrenes, polyalkadienes, polyurethanes, polyamides, polyesters, polycarbonates, polysulfones, polyethersulfones, polyetherketones, acrylic polymers, or copolymers or mixtures thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.