Multi-colored lustrous pearlescent pigments

US8349067B2 · kind B2 · utility

Assignee

• Sun Chemical Corporation · US

Inventors

• Aaron M. Hollman · Hebron, US
• Stephane Nicolas · Senlis, FR
• Philippe Schottland · Sparta, US
• Marguerite Debacker · Court-Saint-Etienne, BE
• Aurelie Antonowicz · Gembloux, BE
• Hai Hui Lin · Hangzhou City, CN

Key dates

• Filing date: Oct 31, 2007
• Grant date: Jan 8, 2013
• Expiry date: Apr 8, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09C2200/407
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A pearlescent pigment, wherein the pigment is an inorganic material and the color of a homogeneous coating of the pigment, measured over a white background, is selected from the group consisting of: a CIELAB L* value of about 30 or less and a chroma value of about 3 or less; a CIELAB hue angle, hab, from about 50 to about 80 degrees, wherein L* is not more than about 85, and the chroma value is greater than 22; a CIELAB hue angle, hab, from about 80 to about 275 degrees, wherein L* is not more than about 80, and the chroma value is greater than about 10; and a CIELAB hue angle, hab, from not less than about 275 to not more than about 50 degrees, wherein L* is not more than about 85, and the chroma value is greater than about 9. The pigments may be used in a variety of applications including cosmetics, plastics, automotive, or architectural coatings.