Flexible polyurethane foam having a high fire resistance
US4895878A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1988 |
| Grant date | Jan 23, 1990 |
| Priority date | — |
| Expiry date | Sep 19, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/906
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A flexible highly elastical polyurethane foam having a density ranging between 25 and 150 kg/m.sup.3 and a relatively high fire resistance obtained by the reaction of an isocyanate and/or a chemically modified derivate thereof with a highly molecular reactive polyol in presence of a catalytic agent, of a cross-linker, and/or an extender, of water as blast means and of a fire retardant, characterized in that said fire retardant comprises at least one of the following components: (1) linear urea-formol oligomer mixture having the general formula NH.sub.2 --CO--NH--[CH.sub.2 --NH--CO--NH].sub.n --CH.sub.2 --NH--CO--NH.sub.2, wherein n can have the value from 0 to 50; (2) urea in powdered form of which the particles are at least partially recovered by a less soluble film, as well as sulfur as of a resin; (3) dicyandiamide having the general formula: ##STR1##
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.