Modified polymer polyols
US4843106A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 1988 |
| Grant date | Jun 27, 1989 |
| Priority date | — |
| Expiry date | May 9, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/906
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Fluid polymer polyol dispersions which impart improved fire resistance to polyurethane foam. The fluid polymer polyol dispersions are prepared by grafting one or more monomers onto a polyol backbone with the difference that the grafting takes place in the presence of a flame retardant. During the grafting process the flame retardant is incorporated into the fluid polymer polyol dispersion. When such fluid polymer polyol dispersions are used, the fire resistance of the final polyurethane foam is improved relative to cases where a conventional fluid polymer polyol dispersion and a flame retardant are added separately to the polyurethane foam formulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.