Process for producing polymer bound hindered amine light stabilizers
US4866136A · kind A · utility
12Cited by
34References
29Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 12, 1987 |
| Grant date | Sep 12, 1989 |
| Priority date | — |
| Expiry date | Aug 12, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2810/50
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
N-(polyalkyl-4-piperidinyl)imide containing polymer is prepared by blending together a mixture of a polymer containing anhydride functions and a 4-amino-polyalkylpiperidine or its 1-alkyl or 1-acyl derivatives and heating said materials in the blend, either prior to or during the blending step to the molten stage of the polymer; thereafter, heating said blend above 180.degree. C. for a sufficient time to form the product. All volatile by-products are removed either simultaneously or subsequently with the above 180.degree. C. heating step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.