| 摘要 |
PURPOSE:To provide an adhesive which can be easily operated and has excellent solvent resistance and pressure response, by enclosing a core material composed of an adhesive component in a composite wall membrane formed by the reaction between an aminoplast and a polyisocyanate. CONSTITUTION:A microcapsule formed by enclosing a core material composed of an adhesive component constituting a chemical reaction type adhesive or a solvent-reactivation type adhesive in a composite wall membrane formed by the reaction between an aminoplast and a polyisocyanate, is dispersed in other adhesive components constituting an adhesive. Particularly, in the production of a microcapsule contg. a volatile solvent, it is preferred to form the wall membrane by the reaction between an aminoplast and a polyisocyanate which is incorporated in the core material. Said aminoplast means a resin obtd. by the polycondensation between a prepolymer such as a melamine/formaldehyde prepolymer and a water-soluble cationic urea resin in the presence of an anionic surfactant. |
