Electrocoating composition comprising the solid pigment dispersion
AssigneeBASF SE
InventorsJames W. Benefiel, Peter D. Clark, Laura M. Lanni
Life of this patent
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Abstract
The present invention is directed to a process for producing an aqueous cathodic electrocoating composition comprising A) mixing i) a powder comprising a dispersion of a pigment in a solid resin ii) a principal resin iii) a crosslinker and optionally iv) an additive selected from the group consisting of organic solvents, catalysts, wetting agents, conditioning agents, thickeners, rheology control agents, antioxidants, surfactants, leveling agents and mixtures thereof B) salting with an acid and C) dispersing in deionized water.
Claims14
A process for producing an aqueous one component cathodic electrocoating composition comprising:
- A) first, forming a powder dispersion of a pigment in a solid resin selected from the group consisting of polyesters, polyurethanes, epoxies, aminoplasts, alkyd and acrylic resins by
- i) mixing pigments into molten solid resin, followed by
- ii) chilling the pigment/resin mixture and
- iii) pulverizing the mixture into a powder,
- B) subsequently, forming the electrocoating composition by
- i) first mixing together the powder dispersion of a pigment in a solid resin and a principal resin selected from the group consisting of epoxy amine adducts, and
- ii) subsequently adding a crosslinker and optionally an additive selected from the group consisting of organic solvents, catalysts, wetting agents, conditioning agents, thickeners, rheology control agents, antioxidants, surfactants, leveling agents and mixtures thereof,
- C) salting with an acid and
- D) dispersing in deionized water.
A process for producing an aqueous one component cathodic electrocoating composition comprising:
- A) mixing
- ii) a principal resin selected from the group consisting of epoxy-amine adducts
- iii) a crosslinker and optionally
- iv) an additive selected from the group consisting of organic solvents, catalysts, wetting agents, conditioning agents, thickeners, rheology control agents, antioxidants, surfactants, leveling agents and mixtures thereof
- B) salting with an acid,
- C) dispersing in deionized water and
- D) mixing with
- i) a powder comprising a dispersion of a pigment in a water soluble solid cationic resin.
Dependencies are inferred from the claim text.