Light stable thermoplastic polyurethanes

Details Light stable thermoplastic polyurethanes Light stable thermoplastic polyurethanes

C - Chemistry, Metallurgy

08

G

402/140, 117/195

C08G 18/65 (2006.01) C08G 18/72 (2006.01)

Patent

CA 1040342

Abstract of the Disclosure One-shot thermoplastic polyurethanes stable to discoloration by light are made by reacting a polyol with a mixture of aromatic and aliphatic polyisocyanates. For example, polytetramethylene ether glycol and 1,4- butanediol may be reacted with a mixture of methylene- bis(p-phenylisocyanate) and methylenebis(4-cyclohexyl- isocyanate) in the presence of stannous octoate in a one shot procedure to form a thermoplastic suitable for coating fabric.

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