Process for preparing graft polymer dispersions and polyurethanes prepared therefrom
US4661531A · kind A · utility
11Cited by
13References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1985 |
| Grant date | Apr 28, 1987 |
| Priority date | — |
| Expiry date | Apr 10, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/63
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Graft polymer dispersions in a polyol are prepared by a continuous process employing in situ free radical polymerization of an ethylenically unsaturated monomer in a polyol containing from about 0.001 to 0.09 mole of induced unsaturation per mole of polyol in the presence of an effective amount of a chain transfer agent. Products prepared by this process have uniform viscosity with resulting product uniformity. Polyurethane foams incorporating flame retardants prepared from these dispersions readily pass the California No. 117 Flame Test.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.