Storage stable one component urethanes and method for using same
AssigneeTextron Inc.
InventorGerald Naples
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Abstract
A storage stable, weather resistant, one-component air cured urethane composition. The composition comprises a moisture activated curing agent and a polyisocyanate prepolymer. The moisture activated curing agent comprising an oxazolidine ring. The polyisocyanate prepolymer comprises at least two unreacted isocyanate groups and is the reaction product of a polyester polyol, a low molecular weight polyol having at least three hydroxy groups and isophorone diisocyanate. The polyester polyol and low molecular weight polyol are reacted with the isocyanate at an equivalent weight ratio of polyester polyol to low molecular weight polyol of from 0.25:1 to 5:1. The invention also comprises the method for coating a surface with the composition and the resulting coated article.
Claims26
A storage stable, weather resistant, one-component air cured urethane composition which comprises a moisture activated curing agent and a polyisocyanate prepolymer, said moisture activated curing agent comprising an oxazolidine ring and said polyisocyanate prepolymer comprising at least two unreacted isocyanate groups and being the reaction product of a polyester polyol, a low molecular weight polyol having at least three hydroxy groups at an equivalent weight ratio of polyester polyol to low molecular weight polyol of from 0.25:1 to 5:1 and isophorone diisocyanate.
Dependencies are inferred from the claim text.