Mitsubishi Chemical Corporation

Eiji Fujimoto

Masaaki Miyamoto

Kiyoji Kuma

Takao Tayama

Narutoshi Hyoudou

Colored aromatic polycarbonate resin compositions are prepared by dispersing a colorant (b) selected from phthalocyanine-based compounds, anthraquinone-based compounds and ultramarine blue in a polyalkyleneglycol compound (c) having a number-average molecular weight of 62 to 4000 of formula (2):HO&#x2014;[&#x2014;CHR&#x2014;CHR&#x2014;]&#x2014;OH&#x2003;&#x2003;(2)where R, R, Rand Rare independently hydrogen atoms or alkyl groups, and m is not less than 1. The dispersion is added to an aromatic polycarbonate resin (a) kept in a molten state which has a viscosity-average molecular weight of not less than 16000 and contains a branched constitutional unit of formula (1): in an amount of 0.3 to 0.95 mol % where X is a single bond, an alkylene group having 1 to 8 carbon atoms, an alkylidene group having 2 to 8 carbon atoms, a cycloalkylene group having 5 to 15 carbon atoms, a cycloalkylidene group having 5 to 15 carbon atoms, or a divalent connecting group &#x2014;O&#x2014;, &#x2014;S&#x2014;, &#x2014;CO&#x2014;, &#x2014;SO&#x2014; and &#x2014;SO&#x2014;.

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Kitakyushu, Japan

Eiji Fujimoto