申请人:MEDICAL INDICATORS
(a limited partnership under US law)
公开号:EP0260923A2
公开(公告)日:1988-03-23
A temperature sensing composition and thermometer utilizing said composition wherein the temperature sensing composition comprises a cholesteric liquid crystal in combination with a first dye having a maximum absorption of about 540 to about 640 nanometers and a second dye having a maximum absorption of about 380 to about 520 nanometers. Each dye is present at about 0.02 to about 0.25 weight percent based on the liquid crystal. The ratio of first dye to second dye is preferably about 1:4 to about 4:1; more preferably about 1:1 to 4:1. The preferred dyes are oil soluble azo dyes.
一种温度传感组合物和使用所述组合物的温度计,其中温度传感组合物包括胆甾族液晶与第一种染料的组合,第一种染料的最大吸收率约为 540 至约 640 纳米,第二种染料的最大吸收率约为 380 至约 520 纳米。 每种染料在液晶中的含量约为 0.02 至约 0.25 重量百分比。 第一种染料与第二种染料的比例优选约为 1:4 至约 4:1;更优选约为 1:1 至 4:1。 优选的染料是油溶性偶氮染料。