Anti-oxidant isocyanurate ester of thioamidophenol and polyolefins stabilized therewith
US4680325A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1986 |
| Grant date | Jul 14, 1987 |
| Priority date | — |
| Expiry date | Feb 10, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/378
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Isocyanurate esters of thioalkanoamidophenols useful in the stabilization of organic materials normally susceptible to oxidative degradation are prepared by reacting an appropriate isocyanurate trithiol, which is a selected tris-mercapto alkanoic acid ester of tris-(2-hydroxyethyl) isocyanurate with an appropriate alkenyl compound, which is a selected N-alkenyl[4-amino-(mono- or dialkyl)phenol] or, where the alkano moiety is a sole methylene group, by reaction of tris-(2-hydroxyethyl) isocyanurate with an appropriate [mercapto-N-(mono- or di-alkyl]-4-hydroxyphenylalkanamide alkenoic] acid. In a preferred embodiment, the ester is 1,3,5-tris{2-hydroxy ethyl-[3-mercapto-(3',5'-di-tert-butyl-4'-hydroxypropionanilide)]propionat e}isocyanurate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.