Improved water-based polyurethanes for footwear

C - Chemistry – Metallurgy – 09 – J

Patent

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Details

C09J 175/06 (2006.01) C08G 18/08 (2006.01) C08G 18/12 (2006.01) C08G 18/66 (2006.01) C08G 18/72 (2006.01) C08L 75/06 (2006.01) C09J 5/06 (2006.01)

Patent

CA 2233083

A water-based sulfonated polyurethane composition and footwear manufactured using the composition as an adhesive, coating and primer. The sulfonated polyurethane is a reaction product of (a) at least one polyisocyanate; (b) at least one alkylene diol; (c) at least one sulfonated polyester polyol wherein the sulfo groups thereof are present as alkali metal salts; and (d) at least one dihydroxy carboxylic acid, or salt thereof. The composition may also be modified to include a dispersed polymer or copolymer of an ethylenically unsaturated monomer. Such modified compositions may be obtained by preparing the sulfonated polyurethane in the presence of an ethylenically unsaturated monomer and subsequently subjecting the mixture to free-radical polymerization conditions.

La présente invention concerne une composition de polyuréthane sulfoné et des articles chaussants fabriqués à l'aide de cette composition utilisée comme adhésif, revêtement et couche d'apprêt. Le polyuréthane sulfoné est un produit de réaction (a) d'au moins un polyisocyanate, (b) d'au moins un diol d'alkylène, (c) d'au moins un polyol de polyester sulfoné dans lequel les groupes sulfo sont présents sous forme de sels alcalino-métalliques et (d) d'au moins un acide dihydroxy carboxylique ou l'un de ses sels. La composition peut également être modifiée de façon à inclure un polymère ou copolymère dispersé d'un monomère éthyléniquement insaturé. On peut obtenir de telles compositions modifiées en préparant le polyuréthane sulfonée en présence d'un monomère éthyléniquement insaturé puis en soumettant le mélange à des conditions de polymérisation radicalaire.

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