Patent ID: 6203736
Filing Date: 2001-03-20
Classification: B05D,C09B,C09D,C09K,Y10T

Abstract:
A method for producing platlet-shaped interference pigments comprising applying liquid crystalline polymers in a liquid state as a first thin film to a smooth substrate to thereby arrange its mesogens at least approximately chirally-nematically, smectically, cholesterically, or combinations thereof, and curing the film, leaving said film on the smooth substrate and applying a layer of a light absorbent dye to the film in a layer thickness that produces light absorption and then curing said film with the light absorbent layer thereon thereby resulting in a two-layer cured film, pulling the resulting two-layer cured film off the substrate, and fracturing the two-layer film into platelet-shaped particles, the particles having lateral uncoated edges.