Aqueous acrylic coating composition

Details Aqueous acrylic coating composition Aqueous acrylic coating composition

C - Chemistry, Metallurgy

09

D

C09D 133/06 (2006.01) C09D 5/02 (2006.01) C09D 175/04 (2006.01)

Patent

CA 2399487

An aqueous coating composition comprising a dispersion in an aqueous medium of an acrylic addition polymer having an acid value of at least 20, and (ii) an acrylic addition polymer having an acid value lower than that of polymer (i). Preferably the composition also comprises a cross-linked e.g. a polyisocyanate or a melamine resin.

L'invention concerne une composition de revêtement aqueuse, qui comprend une dispersion dans un milieu aqueux : (i) d'un polymère d'addition acrylique présentant un indice d'acidité d'au moins 20, et (ii) d'un polymère d'addition acrylique présentant un indice d'acidité inférieur à celui du polymère (i). De préférence, la composition renferme également un agent de réticulation, p. ex. un polyisocyanate ou une résine de mélamine.

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