Mitsui Chemicals, Inc.

Yasuhiro Nukii

Koju Okazaki

Kenichi Sugimoto

Atsuo Otsuji

Chojiro Higuchi

Masatoshi Takagi

Masaru Wada

Hidetoshi Hayashi

Mitsuo Nakamura

Naoki Tomoshige

A poly(thio)ester (co)polymer which comprises a repeating structural unit represented by the formula (1-A) as an essential structural unit:[wherein Ris a divalent aliphatic hydrocarbon group which may contain at least one sulfur atom in a sulfide group; Ris a mono- or poly-cyclic aliphatic or aromatic dicarboxylic acid residue; and Xand Xare each independently an oxygen atom or sulfur atom, and when Xand Xare the oxygen atoms, Ris a divalent aliphatic hydrocarbon group containing at least one sulfur atom in the sulfide group]; and an optical component obtainable by molding the poly(thio)ester (co)polymer. The poly(thio)ester (co)polymer is excellent in transparency and optical characteristics (e.g., a higher refractive index, higher Abbe number, and lower birefringence), and has also good mechanical characteristics and thermal characteristics, and further is excellent in melt fluidity and injection moldability.

Optical component and sulfur-containing poly(thio)ester (co)polymer

1,3-Bis(3-aminophenoxy)benzene effective, for example, as a raw material for highly heat-resistant polyimide is produced industrially at a high yield by a reaction between 1,3-difluorobenzene and an alkali metal salt of 3-aminophenol.

Process for producing 1,3-bis(3-aminophenoxy)benzene

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Omuta, Japan

Yasuhiro Nukii