Waterborne coating compositions for automotive applications

Details Waterborne coating compositions for automotive applications Waterborne coating compositions for automotive applications

C - Chemistry, Metallurgy

09

D

117/150, 400/904

C09D 151/08 (2006.01) B05D 1/36 (2006.01) B05D 7/16 (2006.01) C08F 291/00 (2006.01) C08F 299/06 (2006.01) C09D 5/02 (2006.01)

Patent

CA 2016097

A waterborne coating composition having a total solids content at application of greater than 30 percent, contains pigment and a dispersion of polymeric microparticles in an aqueous medium. The microparticles contain greater than 30 percent by weight based on the microparticles of a substantially hydrophobic polymer which is essentially free of repeating acrylic or vinyl units in the backbone, has a molecular weight greater than 300 and is adapted to be chemically bound into the cured coating composition. The aqueous medium of the microparticle dispersion is substantially free of water soluble polymer.

Divulgation d'un revêtement en phase aqueuse ayant une teneur en solides totaux à l'application de plus de 30 %, contenant un pigment et une dispersion de microparticules polymères dans un milieu aqueux. Les microparticules contiennent plus de 30 % en poids d'un polymère essentiellement hydrophobe qui est essentiellement exempt d'unités acryliques ou vinyles répétées dans le squelette, a un poids moléculaire supérieur à 300 et est adapté pour être chimiquement lié dans le revêtement durci. Le milieu aqueux de la dispersion des microparticules est essentiellement exempt de polymère soluble dans l'eau.

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