Disclosed are a novel crystal form of the fluoran compound represented by formula (I) as characterised by specific X-ray powder diffraction pattern and melting range; process for the preparation of said novel crystal form and recording materials comprising the said crystal form.
申请公布号
US6071853(A)
申请公布日期
2000.06.06
申请号
US19980199089
申请日期
1998.11.24
申请人
CIBA SPECIALTY CHEMICALS CORPORATION
发明人
KIRK, ROY ALAN;GAWTREY, JONATHON;HENEGHAN, MICHAEL;WHITWORTH, JOHN;DEARDEN, IAN ANTONY;TAYLOR, JAMES PHILIP;HENSHALL, JOHN BARRY