Pacification of optically variable pigments for use in waterborne coating compositions
First Claim
Patent Images
1. A composition comprising an optically variable pigment treated with a slurry of water, organic solvent and at least one metal salt selected from the group consisting of salts of transition metals having atomic numbers 21-28;
- 39-42;
57 and 72-74; and
salts of the lanthanide series of rare earth metals having atomic numbers of from 58 to 71.
0 Assignments
0 Petitions
Accused Products
Abstract
The present invention is a composition comprising an optically variable pigment modified with metal salt selected from the group consisting of salts of transition metals having atomic numbers 21-28; 39-42, 57 and 72-74; and salts of the lanthanide series of rare earth metals having atomic numbers of from 58 to 71. The invention also includes a method for forming the surface treated pigments and coating compositions containing the pigments.
57 Citations
11 Claims
-
1. A composition comprising an optically variable pigment treated with a slurry of water, organic solvent and at least one metal salt selected from the group consisting of salts of transition metals having atomic numbers 21-28;
- 39-42;
57 and 72-74; and
salts of the lanthanide series of rare earth metals having atomic numbers of from 58 to 71. - View Dependent Claims (2, 3, 4, 5)
- 39-42;
-
6. A composition comprising an optically variable pigment treated with a at least one metal salt selected from the group consisting of vanadium, chromium, molybdenum and cerium salts and mixtures thereof.
-
7. A process for treating optically variable pigment particles with a metal salt selected from the group consisting of salts of transition metals having atomic numbers 21-28;
- 39-42;
57 and 72-74; and
salts of the lanthanide series of rare earth metals having atomic numbers of from 58 to 71, comprising the steps ofa) forming a slurry by combining solvent, metallic salt, water and optically variable pigment particles, b) mixing the slurry for a sufficient time to allow formation of the protective metallic coating on the pigment particles, c) separating the pigment particles from the liquid component of the slurry, d) washing the pigment particles and e) drying the pigment particles. - View Dependent Claims (8, 9, 10, 11)
- 39-42;
Specification