POLYESTER RESIN COMPOSITION AND CAMERA MODULE CONTAINING THE SAME

• Main Authors: WASHIO ISAO, AMANO AKINORI, TAKIZAWA NOBUHIRO, OGASAWARA HIDETO, EBATA HIROKI, KAGEYAMA FUMIO
• Format: Patent
• Language: English; Japanese
• Published: 12.02.2015
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PHYSICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

PROBLEM TO BE SOLVED: To provide a thermoplastic resin composition which has excellent heat resistance and low particle property, extremely good dimensional stability (particularly, in dimensional changes accompanying moisture absorption) and which can be molded into a sliding member such as a camera module member, and to provide a component containing the composition, which has a sliding structure such as a camera module.SOLUTION: A polyester resin composition for a sliding member is provided, which comprises: a polyester resin (A) including a dicarboxylic acid component unit (a1) including a dicarboxylic acid component unit derived from terephthalic acid and a dialcoholic component unit (a2) including a component unit having a cyclohexane skeleton, and having a melting point or a glass transition temperature of 250°C or higher; a copolymer (C) having a structural unit derived from an olefin, a structural unit derived from an α, -unsaturated carboxylate, and a structural unit having a cyclic oxy hydrocarbon structure including a structure derived from an α, -unsaturated carboxylic acid glycidyl ester; and at least one of carbon black (G) and a fibrous inorganic filler (D). 【課題】耐熱性と低パーティクル性に優れ、しかも寸法安定性（特に、吸湿に伴う寸法変化）が極めて良好な、カメラモジュール部材などの摺動部材に成形可能な熱可塑性樹脂組成物とそれを含むカメラモジュールなどの摺動構造を有する部品を提供する。【解決手段】テレフタル酸から誘導されるジカルボン酸成分単位を含むジカルボン酸成分単位（ａ１）と、シクロヘキサン骨格を有する成分単位を含むジアルコール成分単位（ａ２）とを含み、融点もしくはガラス転移温度が２５０℃以上であるポリエステル樹脂（Ａ）と、オレフィン由来の構造単位と、α、 -不飽和カルボン酸エステル由来の構造単位と、α， −不飽和カルボン酸グリシジルエステル由来の構造を含む環状オキシ炭化水素構造を有する構造単位とを有する共重合体（Ｃ）と、カーボンブラック（Ｇ）および繊維状の無機充填材（Ｄ）の少なくとも一つとを含む、摺動部材用ポリエステル樹脂組成物。【選択図】なし