Polyether polyol and polyurethane compositions protected against oxidation and core scorching
US5308899A · kind A · utility
8Cited by
13References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 16, 1992 |
| Grant date | May 3, 1994 |
| Priority date | — |
| Expiry date | Nov 16, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/1535
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Described are compositions protected against thermal and oxidative degradation that comprise PA0 A) a polyether polyol or mixtures of such polyols, PA0 B) at least one benzofuranone derivative of formula I, ##STR1## wherein L, G, m, R.sub.1 to R.sub.5 and R.sub.21 to R.sub.24 are as defined in claim 1, PA0 C) at least one compound from the group of the phenolic anti-oxidants, and/or PA0 D) at least one compound from the group of the amino anti-oxidants of the secondary amine type. Also polyurethane(s) (foam(s)) prepared therefrom are protected against thermal and oxidative degradation, especially against core scorching.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.