Stabilizers for polymer polyols
US5990232A · kind A · utility
14Cited by
6References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 25, 1997 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Aug 25, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L71/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Unique, well defined polyethers containing both hydroxyl-functionality and unsaturation-functionality are prepared by oxyalkylating an unsaturated monomer having at least two free carboxylic acid groups in the presence of an effective amount of a double metal cyanide complex catalyst, optionally, when necessary, in the presence of a free radical polymerization inhibitor. The resulting polyethers are eminently suitable for such uses as polymer polyol stabilizers or stabilizer precursors, and both in situ and ex situ impact modifiers for thermoplastics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.