Water-blown, flame retardant rigid polyurethane foam
AssigneeBayer MaterialScience AG
InventorsJan L. Clatty, Donald L. McCalmon
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Abstract
The present invention provides a flame-retardant polyurethane foam made with non chlorofluorocarbon/hydrogenated chlorofluorocarbon-containing blowing agents and without trimethylolpropane-based polyols that achieves a Class I rating as determined by a modification of the ASTM E-84 tunnel test and may find application in electronic cabinetry, architectural decorative moldings, and interior transportation vehicle walls.
Claims37
A rigid flame retardant polyurethane foam which satisfies the requirements of ASTM E-84 for a Class I foam comprising the reaction product of:
- at least one polyisocyanate;
- with
- a polyol component comprising,
- from about 2 wt. % to about 35 wt. %, based on the weight of the polyol component, of at least one sucrose-based polyol,
- from about 2 wt. % to about 35 wt. %, based on the weight of the polyol component, of at least one non sucrose-based isocyanate-reactive compound, and
- from about 1 wt. % to about 13 wt. %, based on the weight of the foam, of at least one aromatic polyester polyol,
- in the presence of water, and optionally, at least one of carbon dioxide, surfactants, flame retardants, pigments, catalysts and fillers,
- with the proviso that the rigid polyurethane foam contains no trimethylolpropane-based polyols.
A process for making a rigid flame retardant polyurethane foam which satisfies the requirements of ASTM E-84 for a Class I foam comprising reacting:
- at least one polyisocyanate;
- with
- a polyol component comprising,
- from about 2 wt % to about 35 wt. %, based on the weight of the polyol component, of at least one sucrose-based polyol,
- from about 2 wt. % to about 35 wt. %, based on the weight of the polyol component, of at least one non sucrose-based isocyanate-reactive compound, and
- from about 1 wt. % to about 13 wt. %, based on the weight of the foam, of at least one aromatic polyester polyol,
- in the presence of water, and optionally, at least one of carbon dioxide, surfactants, flame retardants, pigments, catalysts and fillers,
- with the proviso that the rigid polyurethane foam contains no trimethylolpropane-based polyols.
Dependencies are inferred from the claim text.