| 摘要 |
PURPOSE:To obtain the above composition having remarkably improved impact strength and suitable as a substitute for ABS resin for housing of electric appliance, etc., by specifying the content of a rubbery elastomer and the particle diameter, particle diameter distribution, etc., of a soft component containing the rubbery elastomer. CONSTITUTION:The objective composition contains a matrix-forming styrene resin and a rubber elastomer. The soft component of the composition has particle form having an average particle diameter of 0.2-2.6mum, preferably 0.4-2.3mum and a particle diameter distribution characterized by two peaks in <0.8mum and >=0.8, respectively. The soft component is dispersed at a ratio to give a rubbery elastomer content of 5-10wt.%. The ratio of the swelling index [SI] of the soft component particle in toluene to the intrinsic viscosity [eta]of the resin matrix [SI]/[eta] is 17-23. |
