| 摘要 |
PURPOSE:To obtain the title inexpensive composition excellent in the balance among properties of gloss, colorability, impact resistance and rigidity, by mixing a rubber-modified PS having a specified microstructure with additives such as polydimethylsiloxane and a mineral oil. CONSTITUTION:An impact-resistant PS resin composition in which a rubberlike polymer in the form of particles is dispersed in a rubber-modified PS, the dispersed particles have a bimodal particle diameter distribution comprising a smaller particle part of a mean particle diameter of 0.1-0.6mum and a larger particle part of a mean particle diameter of 0.7-2.0mum and which contains additives comprising 0.005-0.8wt.% polydimethylsiloxane and 0.25-4.0wt.% mineral oil or/and 0.1-0.5wt.% metal salt of a higher fatty acid and/or higher fatty acid amide. In this way, an inexpensive impact-resistant PS resin having an excellent balance among the properties of a molding, such as impact resistance and rigidity can be obtained. |
