High speed cure sealant
AssigneeEssex Specialty Products, Inc.
InventorsSidky D. Rizk, Harry W. S. Hsieh, John J. Prendergast, Sr.
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Abstract
A moisture curable sealant having good stability in the absence of moisture and a rapid cure rate in the sole presence of atmospheric moisture, the sealant containing a polyurethane prepolymer having an isocyanate functionality between 2.3 and 3.0, an isocyanate content of about 1-4 percent by weight, and, admixed therewith as a catalyst, from 0.2 to 1.75 percent, by weight of the sealant, of dimorpholinodiethyl ether.
Claims10
A moisture curable sealant having good stability in the absence of moisture and a rapid cure rate in the sole presence of atmospheric moisture, said sealant comprising a polyurethane prepolymer having an isocyanate functionality between 2.3 and 3.0, an isocyanate content of about 1-4 percent by weight, and, admixed therewith as a catalyst, from 0.2 to 1.75 percent, by weight of said sealant, of dimorpholinodiethyl ether.
Dependencies are inferred from the claim text.