Article | REF: M1503 V1

Cataphoresis

Author: Victor KEN

Publication date: March 10, 2000

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3. Paint constituents and resin chemistry

3.1 Paint constituents

A cationic paint consists of :

  • a cationic polymer main binder;

  • a pigment paste, composed of pigments and mineral fillers coated with a cationic resin. The resulting shade of a primer can vary from white to black, through various shades of grey;

  • organic solvents, mainly glycol ethers, which play an important role in film appearance. Their quantity has been steadily decreasing over the years, and their concentration is currently less than 5% (by mass) in the working bath;

  • demineralized water: this is the paint vehicle and the system's electrolysis medium.

In practice, the paint is...

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Paint constituents and resin chemistry