Ube Industries, Inc.

Kohichi Kashiwagi

Ryoji Sugise

Shuji Tanaka

Takashi Doi

Masayuki Nishio

Tsunao Matsuura

Hideho Tanaka

Takayoshi Kaneko

Masaru Kunimura

Katsumasa Harada

Hirofumi Ii

Sadao Niida

Shinichi Yoshida

Yutaka Asada

Kazuo Miyamoto

A thermoplastic polyurethane useful for elastomers, elastic fibers and artificial leathers contains a polyaddition product of a diisocyanate and a chain extender with a liquid polyethercarbonate diol which is a reaction product of a carbonate compound with a polyether diol having structural units (a) (&#x2014;(CH)&#x2014;O&#x2014;) and at least one member of structural units (b) (&#x2014;(CH)&#x2014;O) and (c) (&#x2014;CHCH(CH)&#x2014;O&#x2014;), and in which the units (b) are present in an average number (n) of moles of 0 to 5 per mole of the units (a), the units (c) are present in an average number (m) of moles of 0 to 5 per mole of the units (a), and the total average number (n+m) of moles of the units (b) and (c) is more than 1 but not more than 5, per mole of the units (a).

Thermoplastic polyurethane

A composition consisting essentially of a diaryl carbonate and contains a furan ring-containing compound in an amount of not more than 1 ppm is favorably employable for producing less colored polycarbonate.

Diaryl carbonate product and production of polycarbonate

A cyclododecanone compound is produced in a high reaction rate, with a high conversion of the starting compound, and with a high selectivity to and a high yield of the target compound by isomerizing an epoxycyclododecane compound in the presence of a catalyst comprising lithium bromide and/or lithium iodide, without using a solvent or in a non-polar solvent, in an inert gas atmosphere, while substantially no polymeric compounds having a high boiling temperature is produced.

Method and producing cyclododecanone compound

Process for producing aryl carbamates

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Ube, Japan

Kohichi Kashiwagi