Article having basecoat/clearcoat and process for coating
AssigneeImperial Chemical Industries PLC
InventorAlan J. Backhouse
Life of this patent
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Abstract
A process for producing a multi-layer coating upon a substrate surface, in which there is first applied to the surface a pigmented basecoat composition and then there is applied to the basecoat film a transparent topcoat composition; characterized in that the basecoat composition is based upon a dispersion in an aqueous medium of crosslinked polymer microparticles which have a diameter of 0.01-10 microns, are insoluble in the aqueous medium and are stable towards gross flocculation, the dispersion having a pseudoplastic or thixotropic character.
Claims14
A process for the production of a multi-layer protective and/or decorative coating upon a substrate surface, which comprises the steps of:
- (1) applying to the surface a basecoat composition comprising (a) a film-forming material, (b) a volatile liquid medium for the said material and (c) pigment particles dispersed in the said liquid medium;
- (2) forming a polymer film upon the surface from the composition applied in step (1);
- (3) applying to the basecoat film so obtained a transparent topcoat composition comprising (d) a film-forming polymer and (e) a volatile carrier liquid for the said polymer;
- (4) forming a second polymer film upon the basecoat film from the composition applied in step (3);
- and
- (5) curing the polymer film from steps (2) and (4),
- characterised in that the constituents (a) and (b) of the basecoat composition are provided by a dispersion in an aqueous medium of crosslinked polymer microparticles which have a diameter in the range 0.01 to 10 microns, are insoluble in the said aqueous medium and are stable towards gross flocculation, the dispersion having a pseudoplastic or thixotropic character.
Dependencies are inferred from the claim text.