C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 3/03 (2006.01) C08L 31/02 (2006.01) C09D 5/00 (2006.01) C09D 125/08 (2006.01) C09D 133/00 (2006.01) C09D 133/06 (2006.01) C09D 191/06 (2006.01)
Patent
CA 2341456
A coating composition for producing a water washable, protective coating, comprising, by weight, 10-50 % of a mixture of at least two acrylic polymers each having different molecular weights, acid numbers, and glass transition temperatures. The composition includes water and an alkali, in an amount sufficient to maintain the composition at a pH in the range of 7.5 to 9.5 and is further characterized in that the average molecular weight of the mixture of the at least two acrylic polymers is in the range of approximately 35,000 to 100,000. The average acid number of the mixture is in the range of approximately 65 to 150 and the glass transition temperature of a coating produced by the evaporation of the water from the composition is in the range of 0 to 70 °C.
L'invention concerne une composition de revêtement permettant de produire un revêtement de protection lavable à l'eau. Cette composition comprend, en poids, 10 à 50 % d'un mélange d'au moins deux polymères acryliques présentant chacun des valeurs différentes en ce qui concerne leur poids moléculaire, leurs indices d'acidité et leurs températures de transition vitreuse. Cette composition comprend de l'eau et un alcali, selon une quantité suffisante pour maintenir la composition à un pH compris entre 7,5 et 9,5 et est, en outre, caractérisée en ce que le poids moléculaire moyen du mélange des deux polymères acryliques, au moins, se situe entre 35000 et 100000 approximativement. L'indice d'acidité moyen du mélange se situe environ entre 65 et 150 et la température de transition vitreuse du revêtement produit par l'évaporation de l'eau de la composition est comprise entre 0 et 70 DEG C.
Maxwell Jeffrey
Saquet Xenophon G.
Gage Products Company
Ridout & Maybee Llp
LandOfFree
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