Automotive refinish coatings with low volatile organic content
AssigneeBASF SE
InventorsLawrence E. Thieben, John C. Goan
Life of this patent
Estimating the term…
Abstract
The refinish compositions contain an acetoacetate resin based on a monomeric polyol or a hydroxy-functional oligomer of such a polyol; a blocked polyamine (polyketimine and/or polyaldimine), pigment, and alkyd polymer. The alkyd is not reactive toward the acetoacetate resin or the blocked polyamine. The refinish compositions may be prepared from an intermix system that has a plurality of color bases and an unpigmented component. Each color base includes the alkyd resin and one or more pigments dispersed with the alkyd resin. The unpigmented component includes at least one of the acetoacetate-functional resin or the blocked polyamine. A drier for the alkyd resin may be included in one of the components or in a separate, additional component.
Claims20
An ambient-curing coating composition, comprising
- an acetoacetate-functional material having at least two acetoacetate groups, wherein said acetoacetate-functional material has a molecular weight of up to about 1000;
- a blocked polyamine compound;
- a pigment;
- and
- an alkyd, wherein the alkyd is not reactive toward the acetoacetate-functional material or the blocked polyamine compound.
An automotive refinish intermix system, comprising
- a plurality of color components comprising at least one pigment and at least one alkyd resin,
- an unpigmented component comprising an acetoacetate-functional material having at least two acetoacetate groups, wherein said acetoacetate-functional material has a molecular weight of up to about 1000, and
- an unpigmented component comprising a blocked polyamine compound wherein the alkyd is not reactive toward the acetoacetate-functional material or the blocked polyamine compound.
An automotive refinish intermix system, comprising
- a plurality of color components comprising at least one pigment, at least one alkyd resin, and one member selected from the group consisting of an acetoacetate-functional material having at least two acetoacetate groups, wherein said acetoacetate-functional material has a molecular weight of up to about 1000, and a blocked polyamine compound, and
- an unpigmented component comprising the other member of the group not in the color components, wherein the alkyd is not reactive toward the acetoacetate-functional material or the blocked polyamine compound.
Dependencies are inferred from the claim text.