Lactone stabilizing compositions
US7601853B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 19, 2008 |
| Grant date | Oct 13, 2009 |
| Priority date | — |
| Expiry date | May 19, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This invention provides a novel class of compounds and compositions and synthetic methods related to lactone antioxidant 3-arylbenzofuranones. The compounds may be useful to prevent yellowing and deterioration of organic materials preferably polymers, such as polyurethane foams as one example. The lactone antioxidants may be polymeric, and may also be liquid or paste in physical form at room temperature. Although it is not necessary for its stabilizing properties, the compositions may, in some species, bear one or more reactive primary OH groups on the polymer chains. The chains may also contain oligomeric oxyalkylene ether and aliphatic ester functional groups, in one embodiment of the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.