| 摘要 |
PURPOSE:To improve both color devoloping property and stock durability, by in a heat-sensitive recording body containing di-azonium salt, coupler, color-developing assisting agent and organic basic compound, by using the specified S- containing compound as the color developing assisting agent. CONSTITUTION:As the color developing assisting agent, methylphenylsulphone, diphenylsulphone, etc. of a melting point 50-150 deg.C and of slow-soluble or unsoluble property in water, an S-containing compound which contains in a polecule at least one aromatic ring and sulphonic base or sulphone group is used and a mixture of diazinium salt, coupler compound and color-developing assisting agent with grain diameter of 0.1-10mum is prepared with a mixing ratio: 1:(0.1-10): (0.1-20) (in weight ratio). Known diazonium salt, coupler compound can be used and these materials are spread on a supporting body as finely dispersed particles. as a color-developing agent, it is preferable that an organic basic compound is used which is represented in the structural formula I , IIof hydropholic guadinine derivative. |
