THERMOCHROMIC ACRYLIC SYNTHETIC FIBER, ITS PROCESSED ARTICLE, AND PROCESS FOR PRODUCING THERMOCHROMIC ACRYLIC SYNTHETIC FIBER

摘要

A thermochromic acrylic synthetic fiber comprising an acrylonitrile polymer in which a thermochromic pigment composition with an average particle diameter of from 0.5 .mu.m to 30 .mu.m is dispersedly contained in an amount of from 0.5% by weight to 40% by weight based on the weight of the polymer, and being made into fibers; the pigment composition containing (a) an electron-donating color-developing organic compound, (b) an electron-accepting compound and (c) a reaction medium that determines the temperature at which the color-developing reaction of the both compounds takes place. Also disclosed are a processed article of the above thermochromic acrylic synthetic fiber, and a process for producing the thermochromic acrylic synthetic fiber.