Color changing pan paint compositions

Details Color changing pan paint compositions Color changing pan paint compositions

1994-10-03

1996-03-12

Klemanski, Helene

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 22F, 106 25R, 106 26R, C09D 1102

Patent

active

054982820

ABSTRACT:
Pan paints and associated color-changing systems are disclosed. In a first embodiment, the color-changing system comprises an undercolor pan paint coloring composition comprising an undercolor dye whose coloring ability is destroyed in the presence of a pH of about 10 or greater and/or in the presence of a reducing agent; and an overcolor composition comprising a colorant capable of maintaining its characteristic color in the presence of a pH of about 10 or greater and/or in the presence of a reducing agent, and a base such that the pH of the overcolor composition is about 10 or greater and/or a reducing agent. In a second embodiment, the color-changing system comprises an undercolor coloring composition comprising an undercolor dye whose coloring ability is destroyed in the presence of a pH of about 4 or less; and an overcolor coloring composition comprising a colorant capable of maintaining its characteristic color in the presence of a pH of about 4 or less and an acid such that the pH of the overcolor coloring composition is about 4 or less; wherein one or both of the coloring compositions is a pan paint.

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