Dual purpose stabilizer compounds and polymer compositions containing same
US4163008A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 1978 |
| Grant date | Jul 31, 1979 |
| Priority date | — |
| Expiry date | Mar 31, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C327/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Diesters of partially hindered mercaptophenols and 3,5-di-alkyl-4-hydroxybenzoic acid and its corresponding acid salt, wherein such diester corresponds to the following formula ##STR1## wherein R and R.sub.1 are the same and are selected from among the following ##STR2## with R.sub.6 and R.sub.7 being an aliphatic hydrocarbon radical of 3 to 10 carbon atoms; and y being 0-5; PA1 R.sub.2 is a tertiary aliphatic hydrocarbon radical having from 4 to 10 carbon atoms or an alicyclic hydrocarbon radical having from 4 to 10 carbon atoms, where the carbon atom of attachment to the aromatic ring is fully substituted; PA1 R.sub.3 is hydrogen, halogen, an aliphatic hydrocarbon radical having from 1 to 10 carbon atoms or an alicyclic hydrocarbon radical having from 3 to 10 carbon atoms; and PA1 R.sub.4 and R.sub.5 is ##STR3## where WHERE A and A' are independently selected from among hydrogen, an aliphatic hydrocarbon radical of 1 to 10 carbon atoms or an alicyclic hydrocarbon radical of 3 to 10 carbon atoms. The above diesters are highly effective stabilizers of polyolefins against oxidative degradation and also impart a modest degree of protection and such materials against UV degradation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.