Rapid curing aliphatic hot melt adhesive
AssigneeReichhold Chemicals, Inc.
InventorJohn Fromwiller
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Abstract
The present invention provides a viscosity stable, quick curing aliphatic hot melt polyurethane adhesive. The adhesive is prepared by reacting a hot melt polyurethane prepolymer comprising an unblocked aliphatic polyisocyanate and a polyol with a catalyst comprising 1,8-diazobicyclo(5,4,0)undec-7-ene or salt or blocked compound thereof.
Claims12
An adhesive composition prepared by reacting a hot melt polyurethane prepolymer comprising an unblocked aliphatic polyisocyanate and a polyol with a catalyst consisting essentially of 1,8-diazabicyclo(5,4,0)undec-7-ene or salt thereof.
A reactive unblocked aliphatic hot melt polyurethane catalyzed using a catalyst consisting essentially of 1,8-diazabicyclo(5,4,0)undec-7-ene or salt thereof and having a viscosity stability of less than about 2 percent gain per hour at 250.degree. F. and a cure rate of less than about 3 days.
Dependencies are inferred from the claim text.