申请人:NIPPON SODA CO., LTD.
公开号:EP0735105A1
公开(公告)日:1996-10-02
By using the fluoran compound represented by the following general formula (I);
wherein R1 is alkyl containing 1 to 4 carbon atoms, R3 is alkyl containing 1 to 8 carbon atoms, R4 is hydrogen or alkyl containing 1 to 8 carbon atoms, or R3 and R4 may bond with each other to form a ring together with a N atom, R2 is alkyl containing 1 to 4 carbon atoms, and n denotes 0, 1 or 2, however, the substituents represented by R2 may be different with each other when n is 2, as a color former for color forming recording materials, recording materials which have excellent properties in whiteness of the background of the material under light and in photostability of color-formed images on the materials as well as in sufficient color forming capability of the material even after having exposed them to light, can be provided.
使用以下通式(I)代表的氟烷化合物;
其中 R1 是含 1 至 4 个碳原子的烷基,R3 是含 1 至 8 个碳原子的烷基,R4 是氢或含 1 至 8 个碳原子的烷基,或 R3 和 R4 可相互键合,与一个 N 原子一起形成一个环,R2 是含 1 至 4 个碳原子的烷基,n 表示 0、1 或 2,但当 n 为 2 时,R2 所代表的取代基可相互不同、作为彩色成形记录材料的显色剂,可提供在光下材料背景的白度和材料上彩色成形图像的光稳定性以及即使在光下曝光后材料仍有足够的彩色成形能力方面性能优异的记录材料。