Low fire hazard rigid urethane insulation foam, polyol mixtures used in the manufacture thereof, and method for manufacture thereof
AssigneeThe Quaker Oats Company
InventorsWilliam R. Dunlop, William J. Pentz
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Abstract
A low fire hazard rigid urethane insulation foam having high compressive strength and low friability is disclosed. Rigid foam products of this invention have a Class I flame hazard rating according to the ASTM E-84 Steiner tunnel test. The urethane foam contains a halogenated base polyol and a modifying amount of a 2,5-bis-(hydroxymethyl) furan component.
Claims4
In a method for manufacturing rigid polyurethane foam, which method includes co-reacting a polyhydroxy composition with an organic polyisocyanate composition, in the presence of a blowing agent, a foam cell stabilizer, and a catalyst consisting of an urethane-specific catalyst, and in which the polyhydroxy composition includes a base portion thereof consisting essentially of halogenated polyhydroxyl compounds, the improvement comprising:
- adding to the polyhydroxyl composition a 2,5-bis-(hydroxymethyl) furan component in an amount sufficient to provide between approximately 12 and 35 weight percent of the polyhydroxyl composition.
A stable, liquid polyhydroxyl composition for use in the manufacture of rigid urethane insulating foams, comprising 12-24 percent 2,5-bis-(hydroxymethyl) furan component, 76-88 percent halogenated polyol base polyhydroxyl component, as well as 25-40 PHR (parts per hundred polyol compounds) of blowing agent, 1.5-2 PHR surfactant, and 2-7 PHR of an acid scavenger, and a catalyst consisting of 0.8-1.0 PHR urethane specific catalyst.
Dependencies are inferred from the claim text.