Method for preparing a clear coat on a concrete substrate
AssigneeNippon Paint Co., Ltd.
InventorsShinji Kubo, Osamu Yamamoto
Life of this patent
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Abstract
A method for preparing a clear under coat on a concrete substrate by applying onto a coating composition comprising a solvent type synthetic resin varnish and organic or inorganic pigment microparticles having an average diameter of 5 .mu. or less uniformly dispersed in the varnish in an amount which is enough to give a pigment volume concentration of 5 to 50, the difference in mean refractive index of the microparticles and synthetic resin being 0.01-0.40.
Claims3
A method for preparing a clear undercoat on a concrete substrate which comprises applying onto a concrete substrate a coating composition consisting essentially of a synthetic resin varnish, microparticles of an inorganic pigment or an organic plastic pigment having an average diameter of 5.mu. or less and uniformly dispersed in said varnish to give a pigment volume concentration of 5 to 50, wherein the difference in mean refractive index of said microparticles and the synthetic resin in said synthetic resin varnish is 0.08-0.40, and said pigment volume concentration is calculated from the following formula:
- Pigment volume concentration= ##EQU4##
Dependencies are inferred from the claim text.