Fire-retardant product and method of making
AssigneeW. R. Grace & Co.
InventorGlenn E. Fulmer
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Abstract
Articles having increased fire-retardant properties are obtained by surrounding a foraminous core having the desired product properties with an adherent protective layer of a hydrophilic polyurethane foam having large amounts of fire-retardant fillers. The core can be made of rigid, semi-rigid or flexible foams. Preferable cores include conventional bedding and cushioning materials. The protective layer can be sprayed or poured as a coating or molded on to the core.
Claims18
An article having increased fire-retardant properties comprising a foraminous core structure and an adherent outer protective layer made of a hydrophilic polyurethane foam containing large amount of fire-retardant fillers, wherein the adherence between the core and said polyurethane coating is primarily obtained either
- (a) due to the adhesive nature of said polyurethane as it foams around the foraminous core in combination with the mechanical interlock obtained as said polyurethane foam flows into the foraminous core, or
- (b) due to the mechanical interlock obtained as the core is foamed into the inside foraminous structure of a previously formed outer protective layer of said polyurethane foam.
Dependencies are inferred from the claim text.