申请人:THE PILOT INK CO., LTD.
公开号:EP1323540A2
公开(公告)日:2003-07-02
A thermally color-developing reversibly thermochromic pigment which shows a uniform color density in the coloring temperature range and also shows an optional ΔH value within a range of from 3 to 40°C of the ΔH value (hysteresis temperature range) in a temperature-color density curve. Thermally color-developing reversibly thermochromic pigments of a three component system having a ΔH value of within a range of from 7 to 40°C in which at least essential three components including (a) an electron-donating chromic organic compound, (b) a specified compound selected from gallic acid esters and (c) a reaction medium selected from alcohols, esters, ketones and hydrocarbons, which reversibly generates color reactions of both of the compounds within a specified temperature range and has a melting point of less than 50°C, are microencapsulated, and of a four component system having a ΔH value of within a range of from 3 to 25°C in which a compound (d) selected from monomer compounds having a melting point of 50°C or more or polymer compounds having a softening point of 70°C or more is added to the three component system.
一种热显色可逆热致变色颜料,在着色温度范围内显示出均匀的色密度,同时在温度-色密度曲线上显示出ΔH 值在ΔH 值的 3 至 40°C 范围内(滞后温度范围)的可选ΔH 值。热显色可逆热致变色颜料的三组分体系,其 ΔH 值在 7 至 40°C 范围内,其中至少必不可少的三组分包括:(a) 电子负载铬有机化合物;(b) 选自没食子酸酯的特定化合物;(c) 选自醇、酯、酮和烃的反应介质、(c)选自醇、酯、酮和碳氢化合物的反应介质;(d)选自熔点为 50℃或以上的单体化合物或软化点为 70℃或以上的聚合物化合物的化合物;(e)选自熔点为 50℃或以上的单体化合物或软化点为 70℃或以上的聚合物化合物的反应介质。