Dithiodialkanoic acid esters and polymers stabilized therewith
US5041617A · kind A · utility
1Cited by
7References
1Claims
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Key dates
| Filing date | Feb 19, 1988 |
| Grant date | Aug 20, 1991 |
| Priority date | — |
| Expiry date | Feb 19, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M2219/085
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Multifunctional dithiodialkanoic acid esters useful in the stabilization of organic materials normally susceptible to oxidative degradation are prepared by contacting a selected dithiodialkanoic acid chloride with a selected 4-(3-hydroxypropyl)(mono- or di-alkyl) phenol under ester-forming reaction conditions. In a preferred embodiment, the ester is bis-3-(3',5'-di-t-butyl-4'-hydroxyphenyl)propyl dithiodipropionate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.