| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a thermoplastic resin composition, which is excellent both in transparency and in heat resistance and has desired characteristics such as mechanical strengths and molding processability, and which can also provide molded articles causing no entering of bubbles or silver streaks without causing a bubbling phenomenon, particularly at the time of thermal processing, and a production process for such a composition. <P>SOLUTION: The thermoplastic resin composition comprises a methacrylic resin having a ring structure in a main chain thereof and a glass transition temperature of 110°C or higher, and at least one kind of metal compound selected from among metal salts, metal complexes, and metal oxides, wherein a content of the metal compound in the composition is from 10 to 10,000 ppm in terms of metal atom based on a mass of the methacrylic resin. The process for producing such a thermoplastic resin composition, the process including carrying out, when preparing a methacrylic resin having a ring structure in a main chain thereof and a glass transition temperature of 110°C or higher, cyclization condensation reaction using a catalyst to form the ring structure; and then adding a deactivator of the catalyst. <P>COPYRIGHT: (C)2012,JPO&INPIT |
