Thermochromic composition

Plastic and nonmetallic article shaping or treating: processes – Utilizing heat releasable stress to reshape solid workpiece

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264DIG71, 53442, 116207, 116216, 252408, 138104, 422 61, 285 41, 285 93, 285187, 285381, C09K 300, C10K 1112, C09D 508, C09D 526

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043449093

ABSTRACT:
Heat-recoverable articles carrying a "thermochromic" composition comprising organic materials which melt and decompose to provide a color-change indicating that the articles have been heated to a certain temperature, e.g. to melt a sealant carried on the surface of the article which is to contact a substrate around which the article is to be shrunk. Mixtures of relatively simple compounds may be used to graduate the color change, and means are described for preventing reversion to the original color on long-term exposure to moisture.

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Day, J.; "Thermochromism of Inorganic Compounds", Chem. Rev., vol. 68, No. 6, pp. 649-657 (1968).
Day, J.; "Thermochromism", Chem. Rev., vol. 63, pp. 65-80 (1963).

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