Thermochromic microencapsulated pigments

Details Thermochromic microencapsulated pigments Thermochromic microencapsulated pigments

B - Operations, Transporting

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B41M 5/28 (2006.01) B41M 5/30 (2006.01) B41M 5/337 (2006.01) C09B 67/02 (2006.01) C09B 67/20 (2006.01) C09D 5/26 (2006.01) C09K 9/02 (2006.01)

Patent

CA 2318700

Disclosed is a thermochromic microencapsulated pigment which comprises as four essential components (a) an electron-donating chromatic organic compound, (b) an electron-accepting compound, (c) a reaction medium determining the temperatures at which the color reactions of component (a) with component (b) take place, and (d) a color change temperature regulator, the color change temperature regulator (d) comprising one or more compounds selected from the group consisting of esters, alcohols, ketones, acid amides, hydrocarbons, and fatty acids and having a melting point Y (°C) satisfying the relationship (X+30)°C ~ Y ~ 200°C, wherein X (°C) is the melting point of component (c), and the four essential components being microencapsulated.

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