abstract |
PURPOSE: To obtain a new black colorable fluoran compound useful as an electron donative colorless dye for recording material, having excellent light resistance and oil solubility. n CONSTITUTION: A fluoran compound shown by the formula. In the formula, R 1 is 1-4C alkyl group and R 2 is isobutyl group, pentyl group, hexyl group, γ-ethoxypropyl group or tetrahydrofurfuryl group. n COPYRIGHT: (C)1992,JPO&Japio |