POLYCARBONATE DIOL AND POLYURETHANE USING SAME

The present invention relates to a polycarbonate diol comprising a structural unit derived from a compound represented by the following formula (A) and a structural unit derived from a compound represented by the following formula (B), wherein the hydroxyl value is from 20 to 450 mg-KOH/g: HO-R1-OH ...

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Bibliographische Detailangaben
Hauptverfasser: KUSANO KAZUNAO, KANAMORI YOSHIKAZU, NAKAGAWA YOKO, YANO KAORI
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:The present invention relates to a polycarbonate diol comprising a structural unit derived from a compound represented by the following formula (A) and a structural unit derived from a compound represented by the following formula (B), wherein the hydroxyl value is from 20 to 450 mg-KOH/g: HO-R1-OH  (A) HO-R2-OH  (B) the glass transition temperature of said polycarbonate diol as measured by a differential operating calorimeter is −30° C. or less and the average carbon number of a dihydroxy compound obtained by hydrolyzing said polycarbonate diol is from 3 to 5.5.