Thermochromic compositions of color formers and lewis acids

Details Thermochromic compositions of color formers and lewis acids Thermochromic compositions of color formers and lewis acids

2005-06-21

2005-06-21

Hess, B. Hamilton (Department: 1774)

Compositions: coating or plastic

Coating or plastic compositions

Marking

C503S201000, C503S214000, C503S216000, C503S217000, C503S220000

Reexamination Certificate

active

06908505

ABSTRACT:
Thermochromic compositions that include combinations of at least one color former and at least one Lewis acid in a polymer mixture are disclosed. The thermochromic compositions reversibly change appearance from substantially transparent to substantially non-transparent above a lower critical solution temperature.

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