Sumitomo Chemical Company, Limited

Hidehiro Kotaka

Mitsuo Maeda

Yusaku Kohinata

Shinji Ohtomo

Hirokazu Matsui

A resin composition is provided for a sliding member. The composition contains an amorphous resin, flake graphite, and a carbon fiber. The content of the flake graphite is 5 to 40 parts by mass relative to 100 parts by mass of the amorphous resin, and the content of the carbon fiber is 5 to 60 parts by mass relative to 100 parts by mass of the amorphous resin.

Resin composition for sliding member

Disclosed is a method for producing a liquid crystal polyester, which includes the steps of: (1) polycondensing a mixture of 70.5 to 71.5 mol % of a compound represented by the defined formula (I) (for example, 4-acetoxybenzoic acid) with 28.5 to 29.5 mol % of a compound represented by the defined formula (II) (for example, 6-acetoxy-2-naphthoic acid) to form a prepolymer, wherein the prepolymer has a flow initiation temperature of 200&#xb0; C. or higher, and the mixture is polycondensed until reaching the temperature which is at least 30&#xb0; C. lower than the polycondensation temperature; (2) removing the prepolymer in a molten state, followed by solidification and further grinding to produce prepolymer particles; and (3) subjecting the prepolymer particles to a heat treatment at 200 to 310&#xb0; C. under circulation of an inert gas while remaining in a solid phase state.

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Tsukuba, Japan

Hidehiro Kotaka