Rigid foam and associated article and method
OwnerEdward Norman Petersinventor
Life of this patent
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Abstract
A rigid polyurethane or polyisocyanurate foam includes 1 to 50 weight percent of a particulate poly(phenylene ether) having a mean particle size of 1 to 40 micrometers. The particulate poly(phenylene ether) imparts reduced flammability and reduced water absorption to the foam. The foam is useful as a thermally insulating material in articles including domestic appliances, building materials, tanks, pipelines, heating pipes, cooling pipes, cold stores, and refrigerated vehicles.
Claims18
A polyurethane or polyisocyanurate foam comprising 1 to 50 weight percent, based on the total weight of the polyurethane or polyisocyanurate foam, of a particulate poly(phenylene ether) having a mean particle size of 1 to 40 micrometers;
- wherein the polyurethane or polyisocyanurate foam has a core density of 0.03 to 0.7 grams/centimeter3 determined at 23° C. using ASTM D 1622-03.
An article comprising thermal insulation comprising polyurethane or polyisocyanurate foam comprising 1 to 50 weight percent, based on the total weight of the polyurethane or polyisocyanurate foam, of a particulate poly(phenylene ether) having a mean particle size of 1 to 40 micrometers;
- wherein the polyurethane or polyisocyanurate foam has a core density of 0.03 to 0.7 grams/centimeter3 determined at 23° C. using ASTM D 1622-03.
A method of forming a polyurethane or polyisocyanurate foam, the method comprising:
- reacting a polyol and an isocyanate compound in the presence of a blowing agent and a particulate poly(phenylene ether) to form a polyurethane or polyisocyanurate foam;
- wherein the isocyanate compound comprises, on average, at least two isocyanate groups per molecule;
- wherein the particulate poly(phenylene ether) has a mean particle size of 1 to 40 micrometers;
- and
- wherein the polyurethane or polyisocyanurate foam comprises 1 to 50 weight percent of the particulate poly(phenylene ether).
Dependencies are inferred from the claim text.