Coating composition comprising submicron calcium carbonate
AssigneeOmya International AG
InventorsPatrick A.C. Gane, Detlet Gysau, George Saunders, Joseph McJunkins
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Abstract
Coating composition providing gloss and opacity on application, having a pigment volume concentration of from 5% up to the critical pigment volume concentration and characterised in that comprises at least one ground natural calcium carbonate having a volume median diameter of between 0.05 and 0.3 μm, and at least one pigment having a refractive index of greater than or equal to 2.5.
Claims15
Concrete, wood, paper, metal or board coated with a coating composition having a pigment volume concentration (PVC) of from 5 vol.-% up to a critical pigment volume concentration (CPVC), wherein the coating composition comprises:
- at least one submicron ground natural calcium carbonate (SMGCC) having a volume median particle diameter d50 of between 0.05 and 0.3 μm;
- and
- at least one pigment having a refractive index of greater than or equal to 2.5.
Dependencies are inferred from the claim text.