Essex Specialty Products Inc.

Essex Chemical Corporation

John J Prendergast

Harry W Hsieh

Sidky D Rizk

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.

High speed cure sealant

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, and, admixed therewith as a catalyst, from 0.2 to 1.75 percent, by weight of said sealant, of dimorpholinodiethyl ether.

What are disclosed are the method of making a moisture-curable silicon terminated organic polymer which comprises reacting a polyurethane prepolymer having terminal active hydrogen atoms with an isocyanato organosilane having at least one hydrolyzable alkoxy group bonded to silicon, silicon terminated organic polymers so produced, and moisture-curable sealant compositions comprising such a silicon terminated polymer.

Growing community of inventors

Freehold, NJ, United States of America

John J Prendergast