发明公开
EP0256180A1 Chromogenic compounds for pressure- or heat-sensitive recording papers 失效
Chromogenic Verbindungenfürdruck- oderwärmeempfindlicheAufzeichnungsblätter。

Chromogenic compounds for pressure- or heat-sensitive recording papers
摘要:
Chromogenic compounds of formula (I):
wherein R represents an alkyl group of 6 to l2 carbon atoms or benzyl group and ring A or ring B in the quinolyl group may be substituted, are color formers for use in pressure- ­or heat-sensitive recording papers.
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