Polymer polyol dispersion from .alpha.,.beta. ethylenically unsaturated dicarboxylic acid anhydrides
US4721733A · kind A · utility
5Cited by
4References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 9, 1987 |
| Grant date | Jan 26, 1988 |
| Priority date | — |
| Expiry date | Mar 9, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2115/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Stable, fluid polymer polyols made by the free radical polymerization of a monomer mixture of an .alpha.,.beta.-ethylenically unsaturated dicarboxylic acid anhydride and a copolymerizable monomer in an organic polyol medium of secondary hydroxyl terminated polyol are disclosed. In one embodiment, the polymer polyols form stable, acrylonitrile-free dispersions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.