TRANSPARENT THERMOPLASTIC RESIN COMPOSITION

摘要

PROBLEM TO BE SOLVED: To obtain a transparent thermoplastic resin composition having excellent in transparency and impact resistance and reduced in an increase in haze upon a temperature change brought about by e.g. heating by specifying the refractive indices of the rubber phase and the resin phase and specifying the difference between the changes in them upon a temperature change. SOLUTION: This transparent thermoplastic resin composition is the one prepared by dispersing particles having a core/shell multilayer structure in which a rubber phase of a glass transition temperature of 0 deg.C is dispersed in a transparent thermoplastic resin and satisfying the replationship: 0.01>nR23-nP23<0 (wherein nR23 is the refractive index of the rubber phase at 23 deg.C, and nP23 is the refractive index of the resin phase at 23 deg.C when they are independently measured) and the relationship: 0.00025>|dnR/dT-dnP/dT|(wherein dnR/dT is the change in the refractive index of the rubber phase upon a temperature change in a range of 23-70 deg.C, and dnP/dT is the change in the refractive index of the resin phase when they are independently measured). It is desirable that the glass transition temperature of the thermoplastic resin is 50 deg.C or above and that the particles of the core/shell multilayer structure are those of a three-layer structure.