| 摘要 |
PROBLEM TO BE SOLVED: To obtain a new compound giving reversible thermal recording material having a high speed erasing property and preservability in a wide range of use environments by making an alcohol compound having urea bond expressed by a specific formula. SOLUTION: A new compound having new urea bond expressed by formulas I, II can be synthesized by an additional reaction of alcohol and alkylisocyanate having an amino group expressed e.g. by HO(CH2)nNH2 and HO(CH2)pO(CH2) qNH2 respectively. In the formula, (n) shows integers of 2-6, and (m) shows integers of 11-17. In the formula II, (p), (q) show an integer of 2-4, and (r) shows an integer of 11-17 respectively independently. The reaction is done by blending these equivalents, and creates a compound substantially quantitatively. Also, the synthesis is conducted in an organic solvent, and as a used solvent, an inactive solvent is used preferably. Also, there are given toluene, chlorobenzene, or the like as an inactive solvent. |
