Discoloration prevention in pyrithione-containing coating...

C - Chemistry – Metallurgy – 09 – D

Patent

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C09D 5/14 (2006.01) A01N 43/40 (2006.01) A01N 43/653 (2006.01) A01N 43/70 (2006.01) A01P 1/00 (2006.01) A01P 3/00 (2006.01) C09D 7/12 (2006.01)

Patent

CA 2282462

Disclosed is an aqueous coating composition comprising: (a) water, (b) a base medium, (c) a pyrithione salt, in an amount of from 0.01 % to 2.0 % based upon the weight of the composition, and (d) zinc oxide compound selected from the many grades suitable for paint manufacture at a concentration of from 0.001 % to 10 % based upon the weight of the coating composition. Also disclosed is an aqueous antimicrobial coating composition, characterized by antimildew efficacy and protected against discoloration attributable to the presence of pyrithione therein, said composition being selected from the group consisting of water-based paints, adhesives, caulks and sealants, and combinations thereof, said composition comprising water, a pyrithione salt or acid, an organic base medium and a zinc compound, said zinc ion being present in said composition in an amount of from 0.001 % to 10 % based upon the weight of the coating composition.

L'invention concerne une composition de revêtement aqueuse comprenant a) de l'eau, b) un milieu de base, c) un sel de pyrithione, en une quantité comprise entre 0,01 % et 2,0 % sur la base du poids de la composition, et d) un composé d'oxyde de zinc choisi parmi les nombreuses qualités convenant à la fabrication de la peinture à une concentration comprise entre 0,001 % et 10 % sur la base du poids de la composition de revêtement. L'invention concerne également une composition de revêtement antimicrobienne aqueuse, caractérisée par une efficacité antimoisissure et protégée contre la décoloration imputable à la présence de pyrithione, ladite composition étant choisie dans le groupe composé des peintures à l'eau, des adhésifs, des produits de calfeutrage et des matériaux d'étanchéité, et de leurs associations, ladite composition comprenant de l'eau, un sel ou un acide de pyrithione, un milieu de base organique et un composé de zinc, ledit ion zinc étant présent dans ladite composition en une quantité comprise entre 0,001 % et 10 % sur la base du poids de la composition de revêtement.

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