Non-aqueous compositions for heat-sensitive multi-layer coatings

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106 21, 346202, 346226, 427148, 427411, 524564, B05D 136, B05D 700, B41M 312, B41M 500

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046022651

ABSTRACT:
A heat sensitive color-producing multi-layer coating including a first coating layer formed from a base polymeric coating composition comprising a solution of film-forming polymer, a source of polyvalent metallic ions, and at least one fatty acid or derivative thereof; a second coating layer, on the first coating layer, formed from a sensitizing coating composition comprising a solution of organic film-forming polymer, at least one fatty acid or derivative thereof, and reducing agent selected from catechol, pyrogallol, hydroquinone, diphenyl carbazides, gallic acid esters including ethyl gallate, propyl gallate and lauryl gallate, and derivatives thereof; and a third coating layer, on the second coating layer formed from a base polymeric coating composition as defined above.

REFERENCES:
patent: 3682684 (1972-08-01), Newman et al.
patent: 4004065 (1977-01-01), Matsushita et al.
patent: 4032690 (1977-06-01), Kohmura et al.
patent: 4158648 (1979-06-01), Meadus et al.
patent: 4251593 (1981-02-01), Sakamoto et al.
Chem. Abstracts, 97, 31296g (1982).

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