Recording material comprising crystal of fluoran compound

Details Recording material comprising crystal of fluoran compound Recording material comprising crystal of fluoran compound

1993-03-08

1994-04-05

Raymond, Richard L.

Record receiver having plural interactive leaves or a colorless

Having a colorless color-former, developer therefor, or...

Identified color-former

503222, B41M 530, B41M 532

Patent

active

053004736

ABSTRACT:
Disclosed are a crystal of a fluoran compound having the formula comprising exhibiting high peaks at diffraction angles (2.theta.) of 7.5.degree. and 17.0.degree. and relatively high peaks at diffraction angles (2.theta.) of 15.1.degree., 19.1.degree., 21.5.degree. and 25.3.degree. in an X-ray diffraction diagram by the CU-K.alpha. beam and a crystal of a fluoran compound having the formula (II) comprising exhibiting high peaks at diffraction angles (2.theta.) of 5.5.degree. and 19.2.degree. in an X-ray diffraction diagram by the CU-K.alpha. beam, which is useful as a color forming compound in recording materials. ##STR1##

REFERENCES:
patent: 5017710 (1991-05-01), Igaki et al.
patent: 5110952 (1992-05-01), Harada et al.
patent: 5187143 (1993-02-01), Watanabe et al.
patent: 5200210 (1993-04-01), Tsuchida et al.
patent: 5206209 (1993-04-01), Minami et al.
Patent Abstracts of Japan, vol. 9, No. 160 (Jul. 4, 1985).

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