Curing with complexes of selected diamines and alkali metal...

C - Chemistry – Metallurgy – 08 – J

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402/141, 402/3

C08J 3/24 (2006.01) C08G 18/10 (2006.01) C08G 59/50 (2006.01) C08K 5/00 (2006.01)

Patent

CA 1125950

ABSTRACT OF THE DISCLOSURE Amine-curable polymers such as isocyanato-terminated polyurethane prepolymers are cured effectively by the use of a complex of 4,4'-methylene dianline and/or racemic 2,3-di-(4-aminophenyl)butane and selected alkali metal salts including sodium chloride, which complex is used in conjunction with a compound containing a source or active hydrogen, preferably a polyfunctional compound such as a polyhydric alcohol, e.g. glycerol. The combination of the complex and the glycerol exhibits a synergistic effect, which accelerates the curing rate and also lowers the curing temperature.

204477

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