Segregating water-borne coating systems

Details Segregating water-borne coating systems Segregating water-borne coating systems

C - Chemistry, Metallurgy

09

D

C09D 5/02 (2006.01) B05D 3/02 (2006.01)

Patent

CA 2142346

The present invention provides a water-borne coating system comprising a top-coat polymer and a base-coat polymer each in dispersion, and including a component that results in increased mobility of the top-coat polymer relative to the base-coat po- lymer. Preferably, excess surfactant is used to increase the mobility of the top-coat polymer by the formation of micelles, and the curing agent acts to aggregate the base-coat polymer before the curing reaction and whilst segregation occurs. Suitable surfactants include ethylene oxide copolymers and ethoxylated nonylphenol. Preferably non-ionic stabilisation is used for the top-coat dis- persion.

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