| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a resin composition for a reversible heat-sensitive recording material extending the erasion energy range for erasing an image with thermal energy of a thermal head, facilitating the erasion of the image, erasing the image even with the initial erasability after forming the image, erasing the image under erasing conditions corresponding to the initial erasing characteristics without adversely affecting the environment during incineration and having repetition durability of image formation and erasion even when preserved over a long period after forming the image. <P>SOLUTION: This resin composition is obtained by dispersing an organic low-molecular substance in a resin base material and is used as the resin base material for the reversible heat-sensitive recording material having a heat-sensitive layer changing the transparency depending on temperature on a support. The resin composition is composed of (A) an acrylic copolymer having 30-60°C glass transition temperature (Tg) determined from the Fox formula, 20-130 mg KOH/g hydroxy value (OHV) and 20,000-100,000 weight-average molecular weight (MW) and (B) a polyisocyanate. <P>COPYRIGHT: (C)2004,JPO |
