Asahi Kasei Kabushiki Kaisha

Asahi Kasei Chemicals Corporation

Yasuyuki Tsukimori

Eizaburou Ueno

Tetsuo Masubuchi

Yasuyuki Yoshioka

Hayato Yabuki

A polycarbonate diol comprising a repeating unit represented by the following formula (A) in a proportion of 0.1% by mass or more and 99.9% by mass or less:

Polycarbonate diols and their uses

A polycarbonate diol which is useful as a raw material compound for producing a polycarbonate-based polyurethane having a sufficient mechanical strength and excellent in a balance of physical properties such as oil resistance, hydrolysis resistance, and weather resistance and which is amorphous. The polycarbonate diol includes repeating units of the below-shown formula (A) and the below-shown formula (B), wherein both terminal groups are hydroxyl groups, the ratio of the below-shown formula (A) to the below-shown formula (B) is 99:1 to 1:99 by mol, and number-average molecular weight is 300 to 10,000.  

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Tokyo, Japan

Yasuyuki Tsukimori