| 摘要 |
PURPOSE:To obtain inductrially advantageously the titled composition containing highly and uniformly dispersed carbon black, having highly electrical conductivity, by dissolving a polar thermoplastic resin in a specific amount of a solvent having specified solubility, and blending the solution with an aqueous solution suspending carbon black. CONSTITUTION:Firstly, a solution of a polar thermoplastic resin and an aqueous solu tion suspending carbon black (suspended aqueous solution for short) are prepared by using a solvent which has <=10wt% solubility water in the solvent at a temperature when the resin solution is blended and stirred with the suspended aqueous solution, and <=20wt% solubility of the solvent in water as the solvent for dissolving the polar thermoplastic resin in such a way that the amount of the solvent W1g, the amount of water W2g for the suspended aqueous solution, and the solubility of the solvent in water S% satisfy the equation 40/S>=W2/W1. Then, the solution of the polar plastic resin is blended and stirred with the suspended aqueous solution so that the resin is not coagulated and precipitated from the solvent layer, to give a double layer mixed solution of a resin solution having uniformly dispersed carbon black and water. Finally, the solution is dehydrated, the solvent is removed, and the solid component is dried, to give the aimed composition. |
