Moisture-cure urethane adhesives containing .gamma.-butyrolactone
AssigneeMorton International, Inc.
InventorsJames L. Richards, Larry F. Brinkman
Life of this patent
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Abstract
A one-part, moisture-cure urethane adhesive composition contains between 1 and 10 phr .gamma.-butyrolactone which acts as a moisture diffusion agent, thereby promoting a more rapid cure.
Claims4
In a method of bonding a first substrate to a second substrate comprising interposing between said substrates, in the presence of moisture, a moisture-curable urethane composition comprising a urethane resin component comprising polyfunctional isocyanate, said composition having no active hydrogen or urethane-reactive curative, said composition curing in the presence of moisture at ambient temperatures, the improvement wherein said urethane adhesive composition further contains between about 1 and about 10 parts per hundred parts resin by weight .gamma.-butyrolactone as a moisture diffusion agent.
Dependencies are inferred from the claim text.