3-alkylthiopropionic acids and derivatives
US5057622A · kind A · utility
14Cited by
16References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1990 |
| Grant date | Oct 15, 1991 |
| Priority date | — |
| Expiry date | Dec 10, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C319/18
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
3-alkylthiopropionic acids are provided which are a direct addition reaction product of an alkylmercaptan and acrylic acid of an alkali metal salt thereof, the reaction being carried out by heating the reactants in the presence of an aqueous alkaline solution having a pH of at least about 11. The acids can be esterified with pentaerythritol in order to form tetraesters which are especially useful as stabilizers for polymer resins and polymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.