Stabilization of light-sensitive polymers
US4177186A · kind A · utility
18Cited by
2References
13Claims
0Family size
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Key dates
| Filing date | Nov 21, 1977 |
| Grant date | Dec 4, 1979 |
| Priority date | — |
| Expiry date | Nov 21, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/5477
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
4-Siloxy-derivatives of sterically hindered piperidines are good light-stabilizers for organic polymers, especially for polyolefins. The stabilizers are added in an amount of from 0.01 to 5% by weight, preferably 0.02 to 1% by weight based on the polymer. The new compounds are obtainable by O-silylation of the corresponding 4-hydroxypiperidines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.