Polysilylesters having a polyalkylpiperidine as part of the polymer useful as light stabilizers for plastics
US4250268A · kind A · utility
9Cited by
18References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 28, 1978 |
| Grant date | Feb 10, 1981 |
| Priority date | — |
| Expiry date | Nov 28, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/5477
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Condensation polymers or addition polymers which contain sterically hindered polyalkylpiperidine groups are proposed as light stabilizers for plastics. The polymers concerned are relatively low-molecular polymers and a difunctional derivative of a polyalkylpiperidine is additionally used for the manufacture of these. The piperidine radical can be present in the main chain or as a side group of the polymeric stabilizer. Polymeric stabilizers of this type do not tend to migrate out of the plastic or to be removed by extraction; they are therefore very permanent in use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.