Water thinned polymeric vehicle for coating compositons with...

C - Chemistry – Metallurgy – 09 – D

Patent

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C09D 175/06 (2006.01) C08G 18/30 (2006.01) C08G 18/32 (2006.01) C08G 18/42 (2006.01) C08G 18/80 (2006.01) C08G 71/04 (2006.01) C09D 167/02 (2006.01)

Patent

CA 2185453

This invention provides a polymeric vehicle and formulated coating composition which are high in solids and use water to effect viscosities to permit application of such polymeric vehicles and formulated coating compositions with existing commercial application equipment. The polymeric vehicles and formulated coatings include at least one oligoester diol, a carbamate hardener, and in some instances, an additional crosslinking agent. The combination of oligoester diol with carbamate hardener provides a low viscosity coating composition with low to zero VOC content, and provides a coating binder with extremely good film properties.

L'invention concerne un véhicule polymère ainsi qu'une composition de revêtement formulée présentant une teneur élevée en solides et utilisant de l'eau pour obtenir des viscosités permettant l'application desdits véhicules polymères et compositions de revêtement formulées à l'aide d'un équipement d'application commercial existant. Les véhicules polymères et revêtements formulés comprennent au moins un diol d'oligoester, un durcisseur à base de carbamate et dans certains cas un agent de réticulation supplémentaire. La combinaisin du diol d'oligoester avec le durcisseur à base de carbamate permet d'obtenir une composition de revêtement à faible viscosité présentant une teneur en composés organiques volatils faible à nulle, ainsi qu'un liant de revêtement présentant des propriétés de film extrêment bonnes.

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