Crystals of fluoran compound, crystalline solvates thereof and p

Details Crystals of fluoran compound, crystalline solvates thereof and p Crystals of fluoran compound, crystalline solvates thereof and p

1991-07-12

1993-09-14

Ivy, C. Warren

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549227, 427151, C07D31188

Patent

active

052450490

ABSTRACT:
Disclosed are a crystal and crystalline solvate of a fluoran compound represented by the formula ##STR1## wherein R.sub.1 is ##STR2## and which are useful as chromogenic compounds in recording materials such as pressure-sensitive and heat-sensitive recording materials, a process for preparation of said crystal and said crystalline solvate, and recording materials comprising said crystal or said crystalline solvate.

REFERENCES:
patent: 4330473 (1982-05-01), Hatano et al.
patent: 4629800 (1986-12-01), Yonese et al.
patent: 4642357 (1987-02-01), Yahazi et al.
patent: 4749796 (1988-06-01), Sensui et al.
patent: 4806657 (1989-02-01), Zink
patent: 4837210 (1989-06-01), Dwyer-Hallquist et al.
patent: 5071480 (1991-12-01), Zink
Patent Abstracts of Japan, vol. 9, No. 175, Jul. 19, 1985 (JP-A-60 47 068 Mar. 14, 1985).
Patent Abstracts of Japan, vol. 12, No. 1, Jan. 6, 1988 (JP-A-62-167086 Jul. 23, 1987).

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