Heat-sensitive coating composition with 4-aromatic and hydroxy s

Details Heat-sensitive coating composition with 4-aromatic and hydroxy s Heat-sensitive coating composition with 4-aromatic and hydroxy s

1977-03-03

1978-09-05

Louie, Jr., Won H.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

96 90R, 428913, 252 1, 106 22, 106 145, C09D 1100

Patent

active

041117034

ABSTRACT:
A heat-sensitive coating adapted to acquire a stable color contrasting with the background color in selected regions that are heated to an elevated temperature. The coating comprises (1) a piperidine derivative substituted in the 4 position with an aromatic group and a hydroxyl group or a hydrogen atom, (2) a cyclic polyketo compound reactive with the piperidine derivative to form a dye, and (3) a polymeric binder for binding the reactants to a substrate.

REFERENCES:
patent: 2967785 (1961-01-01), Allen et al.
patent: 3024362 (1962-03-01), Sus et al.
patent: 3149991 (1964-09-01), Baumann et al.
patent: 3664858 (1972-05-01), Huffman
patent: 3736166 (1973-05-01), Lawton

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