Process for the preparation of white graft polymer dispersions and flame-retardant polyurethane foams
US4454255A · kind A · utility
41Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1982 |
| Grant date | Jun 12, 1984 |
| Priority date | — |
| Expiry date | Apr 1, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/676
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
White graft polymer dispersions in polyoxyalkylene polyether polyols are employed together with flame retardant compounds to prepare flame retardant polyurethane foams. The polymer dispersions employ less than 0.1 mole of induced unsaturation per mole of polyol mixture. Improved processes for the reparation of these polymer dispersions employ either isomerized maleate containing polyetherester polyols or polyetherester polyols prepared by reacting a polyoxyalkylene polyether polyol, a polycarboxylic acid anhydride and an alkylene oxide in the presence of salts and oxides of divalent metals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.