Aqueous dispersions of urethane-acrylic polymers and use...

Details Aqueous dispersions of urethane-acrylic polymers and use... Aqueous dispersions of urethane-acrylic polymers and use...

C - Chemistry, Metallurgy

08

J

117/201, 400/550

C08J 3/03 (2006.01) C08F 20/36 (2006.01) C08F 299/06 (2006.01) C08G 18/67 (2006.01) C08L 75/14 (2006.01) C09D 175/14 (2006.01)

Patent

CA 1337365

Aqueous dispersions of urethane-acrylic polymers are disclosed, which can be used as coatings resistant to alkalies and organic solvents. These dispersions are obtained as follows: (a) preparation of an unsaturated oligourethane by reaction between at least one organic polyisocyanate and a mixture comprising essentially at least one macroglycol and at least one polyol containing in its molecule at least one ionizable group and at least one ethylene unsaturation; (b) salification of the thus obtained oligourethane; (c) dispersion of the salified oligourethane in water in the presence or not of at least one organic polyamine; and (d) polymerization of the oligourethane with at least one alpha-beta-ethylenically unsaturated monomer.

604953

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