| 摘要 |
<p>PURPOSE:To provide the title ink which has excellent durability under repeated color changes and is excellent in sensitivity to color changes and shelf stability, by using a spirooxazine compd. and an epoxy resin as essential ingredients in combination. CONSTITUTION:1pt.wt. spirooxazine compd. (A) of formula I or II (wherein R1 and R2 are each H, Cl, CH3, C2H5, C3H7 or methoxy) and 0.01-1,000pts.wt. epoxy resin (B) such as polyethylene glycol diglycidyl ether or bisphenol A type epoxy resin, are used as essential ingredients. The components A and B and a binder component (C) such as a synthetic resin (e.g., vinyl resin, polyolefin resin, etc.), natural resin (e.g., ceramic, copal, etc.), rosin ester, rubber derivative, etc. are dissolved or dispersed in a solvent such as water, an alcohol, an ester, a ketone, etc. If desired, a color tone modifier, a plasticizer, a thickener, an ultraviolet absorber, an antioxidant, etc. are added thereto.</p> |
