Primerless two-part polyurethane adhesive
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United States of America Patent
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Apr 2, 2013
Grant Date -
Jul 29, 2010
app pub date -
Jan 15, 2010
filing date -
Jan 26, 2009
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Abstract
A two-part polyurethane adhesive comprising a prepolymer having the reaction product of a non-ionic surfactant and an allophanate modified isocyanate and a curative having a urethane modified high molecular weight polyol, a urethane modified cross-linking compound and a non-urethane modified low molecular weight chain extending compound. The curative has less than 5 equivalent percent total amino and hydroxyl groups having an equivalent weight greater than about 200. The two-part polyurethane adhesive may be used to adhere one or more substrates and can generally be applied without primer or any significant surface preparation.
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