| 摘要 |
PURPOSE:To obtain the title dispersing liquid for pressure sensitive copying paper characterized by small increase in viscosity, which includes the microcapsule having a wall film of melamine formaldehyde polycondensated material and the like, anion macromolecular electrolyte, and bivalent water soluble metal salt. CONSTITUTION:The intended dispersing liquid which includes (A) the microcapsule having the wall film of the melamine formaldehyde polycondensated material or a urea formaldehyde polycondensated material, (B) anion macromolecular electrolyte (preferably polystyrene sulfonic acid soda and the like), and (C) bivalent water soluble metal salt (preferably calcium chloride). In order to obtain said dispersing liquid, e.g., hydrophobic material which is a core material of the capsule is dispersed in the aqueous solution of the component B. Then, an amino compound and formalin which are the wall material are added, amino resin is formed, and the capsule is obtained. Binder and the like are further added, then the component C is added. |
