Rigid foam and associated article

摘要

A polyurethane or polyisocyanurate foam is prepared from a reaction mixture that includes comprising a polyol, an aromatic isocyanate compound, and a blowing agent. The polyol includes a poly(phenylene ether) having a number average molecular weight of 600 to 2000 atomic mass units and an average of 1.5 to 3 hydroxyl groups per molecule. The polyurethane or polyisocyanurate foam exhibits improved resistance to burning and/or reduced elapsed times to formation of tack-free foams relative to foams prepared without the poly(phenylene ether).

主权项

1. A polyurethane or polyisocyanurate foam comprising the product of a reaction mixture comprising:
a polyol comprising a poly(phenylene ether) having a number average molecular weight of 600 to 2000 atomic mass units and an average of 1.5 to 3 hydroxyl groups per molecule; an aromatic isocyanate compound having an average of at least 2 isocyanate groups per molecule; and a blowing agent; wherein the reaction mixture is characterized by an isocyanate index of 105 to 350; and wherein the polyurethane or polyisocyanurate foam has a core density of 0.03 to 0.7 gram/centimeter3.