Pressure- and heat-sensitive coatings

Details Pressure- and heat-sensitive coatings Pressure- and heat-sensitive coatings

C - Chemistry, Metallurgy

09

D

400/1319, 400/13

C09D 5/00 (2006.01) C08K 5/09 (2006.01)

Patent

CA 1098242

ABSTRACT OF THE DISCLOSURE A thixotropic composition for forming opaque pressure- and heat-sensitive coatings of finely divided organic material of particle size and void size from about 0.05 to 10 micrometers in diameter the particles having a melting point above about 150°C, being of substantially uniform colour and subject to plastic flow by heat or pressure to give a transparent appearance. A liquid carrier normally including a binder dispersed in the carrier gives the initial composition the property of a thixotropic gel. The composition optionally includes water-soluble or dispersible dye or a pigment uniformly dispersed in said particles. A method of preparing the compositions comprises precipitating the solid organic material in water, normally incorporating a binder, and optionally incorporating colouring material into the organic material to form a gel-type paste.

274536

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