| 摘要 |
PURPOSE:To suppress the foaming of a coating solution and to prevent the cutting of a character on a coating surface by adding polyalkylene glycol and alkyl ethylene urea to a color forming layer. CONSTITUTION:Polyalkylene glycol and alkyl ethylene urea are added to a color forming layer based on a synthetic resin film microcapsule having a solution of a color former and an org. developer in a high b.p. org. solvent encapsulated therein. Polyalkylene glycol to be used herein is a polyoxyethylene propylene glycol addition polymer or a polyoxyethylene butylene glycol addition polymer and pref. has an average MW of 1700-2500. Alkylene ethylene urea is ethylene urea having a 10-18C alkyl group and, especially, lauryl ethylene urea, oleyl ethylene urea and stearyl ethylene urea are pref. The addition amount of alkyl ethylene urea is pref. 30-80 pts.wt. per 100 pts.wt. of polyalkylene glycol. |
