Sag resistant urethane adhesives with improved antifoaming property
AssigneeAshland Oil, Inc.
InventorAnil B. Goel
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Abstract
An improved antifoaming two component polyurethane adhesive comprising a first component composed of a polyisocyanate prepolymer and a second component composed of a polyol, a poly amine and a bicyclic amide acetal is described.
Claims8
An improved antifoaming polyurethane adhesive comprising a mixture of a first component comprising a polyisocyanate prepolymer and a second component comprising a polyol, a polyamine and a bicyclic amide acetal wherein in the second component the weight ratio of polyol to polyamine is in the range of from 99.5:0.5% to 70:30% and the bicyclic amide acetal is present in from 0.2 to 5% by weight based on the total weight of polyol and polyamine.
The adhesive of Example 6 wherein the second component polyamine is a mixture of piperazine and triethylene diamine.
The adhesive of Example 6 wherein the second component comprises piperazine and stannous octoate.
Dependencies are inferred from the claim text.