Aqueous film-forming dispersions, films formed therefrom and...

Details Aqueous film-forming dispersions, films formed therefrom and... Aqueous film-forming dispersions, films formed therefrom and...

C - Chemistry, Metallurgy

08

L

402/137, 154/141

C08L 75/04 (2006.01) C08G 18/08 (2006.01) C09J 175/04 (2006.01)

Patent

CA 1093722

ABSTRACT OF THE DISCLOSURE A latex suitable for forming improved water-resistant polyurethane products. The latex is prepared in an aqueous system by reacting an NCO-terminated, quarternized, preferably linear, polyurethane prepolymer with water and chain-extending the resulting polyurethane-urea with a difuctional or poly- functional reagent containing groups reactive with primary amino groups, such as epoxy groups, anhydrides and aldahydes, thus increasing the molecular weight of said polyurethane-urea. The latex thus formed can be dried into highly water-resistant films, coatings, and the like.

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