HEAT SENSITIVE RECORDING MATERIAL Russian patent published in 2023 - IPC C07C303/36 C07C311/16 C07C311/21 B41M5/333 B41M5/337 

FIELD: photo printing.

SUBSTANCE: invention is related to a compound of formula (I), which is a colour developer. In formula (I), R and R¹ are independently selected from the group consisting of R¹¹O-R¹²-, where R¹¹ and R¹² are independently linear or branched C₁-C ₈-alkyl, and a radical of formula (II). In formula (II), R², R³, R⁴, R⁵ and R⁶ are independently selected from the group consisting of hydrogen, linear or branched C₁-C₈-alkyl, -NH-C(=O)-R¹⁴, -C(=O)-NH-R¹⁴, where R¹⁴ is linear or branched C₁-C _8-alkyl, -C(=O)OR¹⁵, where R¹⁵ is linear or branched C₁ -C_8-alkyl and halogen, or R² and R³ or R⁴ and R⁵, or both of them, or R³ and R⁴ or R⁵ and R⁶, or both of them, or R² and R³, as well as R⁵ and R⁶ together form a hydrocarbon diradical containing 3 or 4 carbon atoms; Q represents a single bond or a branched or non-branched C₁ -C_8-alkylene, optionally containing one or more oxygen atoms. The invention is also related to a method for producing a compound of formula (I) and a thermosensitive recording material containing it.

EFFECT: invention can use as a component in a heat-sensitive recording material used for thermographic printing.

10 cl, 2 dwg, 21 tbl, 72 ex