Preparation of thermochromic finishing agent

In order to enhance the stability and reversibility of thermochomic materials,using melamine resin as the wall materials,and the crystal violet lactone-stearic acid and tetradecanol as the core,and adding emulsifying agent and xanthan gum aqueous solution as the protective colloid,organic thermal materials are prepared and microencapsulted.Preparation technics:the mass of emulsifier is 2%,super ultrasonic emulsified time is(30 min),the ratio of core and shell is(2∶1),the rate of stirring is(720 r/min) and the temperature of reaction is(70 ℃).The temperature of color changing of the microcapsule is(46 ℃),while the time of color changing is(25 s),and the temperature and the time of color fading are(40 ℃) and(49 s),and its color change reversibly can be affected between purple and light yellow.