Polyurethane dispersion and articles prepared therefrom

Details Polyurethane dispersion and articles prepared therefrom Polyurethane dispersion and articles prepared therefrom

C - Chemistry, Metallurgy

08

G

C08G 18/08 (2006.01) C08G 18/12 (2006.01) C08G 18/28 (2006.01) C08G 18/40 (2006.01) C08G 18/42 (2006.01) C08G 18/48 (2006.01) C08G 18/66 (2006.01) C08G 18/75 (2006.01)

Patent

CA 2504147

The present invention is to a polyurethane dispersion and products produced therefrom wherein the dispersion contains a polyurethane prepolymer produced from the a reaction of an excess of a polyisocyane with an isocyanate reactive molecule wherein the polyisocyante is a bis(isocyanatomethyl)cyclohexane. Preferably the isocyanate comprises (i) trans-1,4- bis(isocyanatomethyl)cyclohexane or (ii) an isomeric mixture of two or more of cis-1,3-bis(isocyanatomethyl)cyclohexane, trans-1,3- bis(isocyanatomethyl)cyclohexane, trans-1,3-bis(isocyanatomethyl)cyclohexane, cis-1,4-bis(isocyanatomethyl)cyclohexane and trans-1,4- bis(isocyanatomethyl)cyclohexane, with the proviso said isomeric mixture comprises at least about 5 weight percent of said trans-1,4- bis(isocyanatomethyl)cyclohexane.

La présente invention concerne une dispersion polyuréthanne et des produits fabriqués à partir de cette dispersion. Cette dispersion contient un prépolymère polyuréthanne produit à partir de la réaction d'un excès de polyisocyane avec une molécule réactive isocyanate, le polyisocyanate étant un bis(isocyanatatométhyl)cyclohexane. L'isocyanate comprend, de préférence, (i) trans-1,4-bis(isocyanatométhyl)cyclohexane ou (ii) un mélange isomère d'au moins deux composés parmi cis-1,3-bis(isocyanatométhyl)cyclohexane, trans-1,3-bis(isocyanatométhyl)cyclohexane, trans-1,3-bis(isocyanatométhyl)cyclohexane, cis-1,4-bis(isocyanatométhyl)cyclohexane et trans-1,4-bis(isocyanatométhyl)cyclohexane, sous réserve que ce mélange isomère comprenne au moins 5 % en poids de ce trans-1,4-bis(isocyanatométhyl)cyclohexane.

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