| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a process for producing a polycarbonate containing a plant-derived starting material and a molded article thereof, the polycarbonate having excellent mechanical strength, heat resistance, a low refractive index, a large Abbe number, low birefringence, and excellent transparency. <P>SOLUTION: The process for producing such a polycarbonate includes a step in which one or more dihydroxy compounds including at least a dihydroxy compound having at least one linking group -CH<SB>2</SB>-O- in the molecule thereof are reacted with a carbonic acid diester in the presence of a polymerization catalyst, wherein the dihydroxy compound having at least one linking group -CH<SB>2</SB>-O- in the molecule thereof has a formic acid content of <20 ppm. The molded article is constituted of a polycarbonate or a composition of the polycarbonate, the polycarbonate being a polycarbonate which contains constituent units derived from a dihydroxy compound having at least one linking group -CH<SB>2</SB>-O- in the molecule thereof and has an Abbe number of≥50 and a 5% weight loss temperature of≥340°C. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
