Patent ID: 6444313
Filing Date: 2002-09-03
Classification: D01F,D04H,Y10S,Y10T

Abstract:
A thermochromic acrylic comprising:an acrylonitrile polymer having thermochrornic microcapsules dispersed therein, said thermochromic microcapsules having a non-round particle cross-section and an average particle diameter of from 0.5 &mgr;m to 30 &mgr;m; said thermochromic microcapsules containing a reversible thermochromic pigment composition comprising (a) an electron-donating color-developing organic compound, (b) an electron-accepting compound and (c) a reaction medium affecting the temperature at which the color-developing reaction of the both compounds takes place; said thermochromic microcapsules having a hollow at a portion of their particle outer surface and having a weight ratio of reversible thermochromic pigment composition/wall film of from 7/1 to 1/1; said thermochromic microcapsules being contained in an amount of from 0.5% to 40% by weight based on the weight of the acrylonitrile polymer, wherein said thermochromic acrylic is formed into fibers.