C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
402/147, 117/195
C08L 75/04 (2006.01) A47G 27/02 (2006.01) C08G 18/48 (2006.01) C08G 18/66 (2006.01) D06N 3/14 (2006.01)
Patent
CA 1297614
ABSTRACT This invention is a polyurethane-forming composition useful for backing textiles which com- prises: (A) a first polyol which comprises a rela- tively high equivalent weight polyol containing an average of from 1.4 to 1.95 hydroxyl groups per mol- ecule, of which at least 30 percent of the hydroxyl groups are primary hydroxyls or a mixture thereof with at least one additional relatively high equivalent weight polyol containing at least 2.05 hydroxyl groups per molecule, of which at least 30 percent of the hydroxyl groups are primary hydroxyls; (B) a relatively low equivalent weight com- pound having about 2 active hydrogen containing moi- eties per molecule; 34,515-F (C) a polyisocyanate and (D) a catalytic amount of a catalyst for the reaction of a polyol and a polyisocyanate, wherein the functionalities and proportions of com- ponents (A), (B), and (C) are such that the average functionality of the components together is from 1.97 to 2.03, and the composition has an isocyanate index of from 85 to 125. This invention is also a process for pre- paring a polyurethane-backed textile by coating the textile on one side with the above-described poly- urethane-forming composition at a coating weight of from 1 to 300 ounces per square yard (0.03 to 10.2 kg/m2) and then heating the coated textile to a temperature of from 50 to 150°C until the poly- urethane-forming composition is cured to a tack-free state. 34,515-F
518150
Kelley Don Howard
Mobley Larry Wayne
Smart & Biggar
The Dow Chemical Company
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