FIELD: chemistry.
SUBSTANCE: invention can be used in the production of microencapsulated thermochromic pigments for paints and varnishes. The thermochromic composition consists of crystal violet lactone, developer and solvent. C12-C14 fatty alcohol is used as a solvent. Polyimide is a compound of the general formula
,
where R is selected from methane, butane, n-butane and 3-methoxy-4-hydroxyphenyl.
EFFECT: invention makes it possible to increase the light fastness and color contrast of a pigment obtained on the basis of a thermochromic composition.
1 cl, 1 tbl, 9 ex
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