Use of polyethylenically unsaturated monomers in polymers polyol dispersants
US5359019A · kind A · utility
5Cited by
10References
35Claims
0Family size
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Key dates
| Filing date | May 17, 1990 |
| Grant date | Oct 25, 1994 |
| Priority date | — |
| Expiry date | May 17, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2101/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Monomers having at least two reactive ethylenically unsaturated sites may be polymerized via a free-radical reaction in the presence of a polyol to produce a dispersant useful in preparing polymer polyols that find uses as coreactants to produce polyurethane foams. The monomers include, but are not limited to, polyethylenically unsaturated maleimides and acrylates. The dispersants prepared in this manner can be used in very small quantities, about 2 to 5 wt. % of the total polyol and still produce a styrene/acrylonitrile polymer polyol with high solids and high styrene levels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.