Mitsubishi Chemical Corporation

Kei Uchiyama

Takayuki Yoshida

Rie Konishi

Kazuo Hirowatari

Makoto Nakamura

Kenji Tsuruhara

Masashi Yokogi

Hiroki Shibata

Toshio Uchibori

Kazuhisa Hatakeyama

Sora Tomita

Takaharu Oono

Michitaka Ise

Yuichi Yayama

Yukie Nakashima

A bisphenol composition including 95% or more by mass of a bisphenol, wherein a bisphenol represented by the following general formula (II) in the bisphenol composition constitutes 150 mass ppm or more, and the bisphenol composition has a methanol dissolution color (Hazen color number) of 2 or less, In formula (II), X denotes a single bond, —CRR—, —O—, —CO—, —S—, —SO—, or —SO—, Rand Rindependently denote a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and Rand Rmay be bonded to each other to form a ring. A method for producing a polycarbonate resin using the bisphenol composition is also described.

Bisphenol composition and polycarbonate resin

Provided is a thermally stable bisphenol composition whose increase in the Hazen color number is suppressed even under higher temperature conditions. A bisphenol composition including an aryl alkyl sulfide or a dialkyl disulfide at 0.1 ppb by mass to 1% by mass with respect to a bisphenol. A bisphenol composition including an aryl alkyl sulfide or a dialkyl disulfide at a predetermined ratio is thermally stable in terms of the Hazen color number, and shows no coloring problem under high temperature conditions. By using such a bisphenol composition, a polycarbonate resin having an excellent color tone can be produced.

Bisphenol composition and method for producing same, and polycarbonate resin and method for producing same

A bisphenol composition including a specific amount of aromatic alcohol sulfonate, and a simple method of producing it are provided. Also provided is a method of producing a polycarbonate resin in which, by using the bisphenol composition including a specific amount of aromatic alcohol sulfonate, melt polymerization reaction can be efficiently allowed to proceed to produce a polycarbonate resin having an excellent color tone. A bisphenol composition including an aromatic alcohol sulfonate at not less than 0.1 ppb by mass with respect to a bisphenol. A method of producing a bisphenol composition, including reacting a ketone or an aldehyde with an aromatic alcohol in the presence of sulfuric acid to produce a bisphenol composition. A method of producing a polycarbonate resin, including producing a polycarbonate resin using the bisphenol composition. A polycarbonate resin including a specific amount of aromatic alcohol sulfonate.

Bisphenol composition containing aromatic alcohol sulfonate and method for producing same, polycarbonate resin and method for producing same, and bisphenol production method

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Chiyoda-ku, Japan

Kei Uchiyama