Copper phthalocyanine pigment
AssigneeCiba Specialty Chemicals Corporation
InventorFridolin Babler
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Abstract
A new copper phthalocyanine pigment characterized by masstone and tint reflection spectra is disclosed. The new copper phthalocyanine pigment is especially useful for coloring coating compositions, such as automotive paints, and plastics. Also disclosed is a new process for preparing a conditioned pigment wherein a pigment crude is air jet milled.
Claims16
A copper phthalocyanine pigment which is not platelet-shaped, wherein at least 95 percent of the pigment particles have a particle size in the range from 0.1 micrometers to 9 micrometers and at least 50 percent of the particles have a particle size in the range from 0.8 to 2.5 micrometers and which is characterized by a 10/90 tint reflection spectrum, which is measured from a panel coated to complete hide with a basecoat/clearcoat paint system, having a broad peak extending from 400 to 700 nm with a maximum at 460 nm.+-.10 nm, a negative slope extending from 480 nm to 700 nm which becomes less negative as the wavelength increases and a reflection at 700 nm that is at least 25 percent of the reflection at 460 nm.
Dependencies are inferred from the claim text.