Title:
POLYCARBONATE DIOL, METHOD FOR PRODUCING THE SAME AND POLYURETHANE USING THE SAME
Document Type and Number:
Japanese Patent JP2020029569
Kind Code:
A
Abstract:
To provide a polycarbonate diol for use as a raw material for polyurethane excellent in a balance of physical properties of flexibility, chemical resistance, low-temperature characteristics, heat resistance and elastic recovery property and to provide a method for producing the polycarbonate diol.SOLUTION: The polycarbonate diol has a hydroxyl value of 20 mg-KOH/g to 42 mg-KOH/g as measured by a method using an acetylating reagent in accordance with JIS K1557-1(2007) in which the glass transition temperature of the polycarbonate diol as measured by a differential scanning calorimeter is -35°C or less; the ratio of a weight average molecular weight in terms of polystyrene of the polycarbonate diol to a number average molecular weight in terms of polystyrene thereof each as measured by gel permeation chromatography is 1.5 to 3.0; and the average carbon number of a dihydroxy compound produced by subjecting the polycarbonate diol to hydrolysis is 3.2 to 5.5 and the dihydroxy compound includes at least one kind selected from the group consisting of 1,3-propanediol, 1,4-butanediol and 2-methyl-1,3-propanediol.SELECTED DRAWING: None
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Inventors:
KUSANO KAZUNAO
KANAMORI YOSHIKAZU
NAKAGAWA YOKO
YANO KAORI
KANAMORI YOSHIKAZU
NAKAGAWA YOKO
YANO KAORI
Application Number:
JP2019215402A
Publication Date:
February 27, 2020
Filing Date:
November 28, 2019
Export Citation:
Assignee:
MITSUBISHI CHEM CORP
International Classes:
C08G64/02; C08G18/44
Domestic Patent References:
| JPH03234813A | 1991-10-18 | |||
| JP2013018979A | 2013-01-31 | |||
| JP2012067259A | 2012-04-05 | |||
| JP2011226047A | 2011-11-10 |
Other References:
YUJI SHIBASAKI, FUMIO SANDA, TAKESHI ENDO: "Cationic Ring-Opening Polymerization of Seven-Membered Cyclic Carbonate with Water-Hydrogen Chloride", MACROMOLECULES, vol. 33, JPN6018012705, 2000, pages 3590 - 3593, ISSN: 0004384594
KEN KOJIO, MUTSUHISA FURUKAWA, SUGURU MOTOKUCHO, MAKOTO SHIMADA, MACHIKO SAKAI: "Structure-Mechanical Property Relationships for Poly(carbonate urethane) Elastomers with Novel Soft", MACROMOLECULES, vol. 42, JPN6018012708, 2009, pages 8322 - 8327, ISSN: 0004384595
KEN KOJIO, MUTSUHISA FURUKAWA, SUGURU MOTOKUCHO, MAKOTO SHIMADA, MACHIKO SAKAI: "Structure-Mechanical Property Relationships for Poly(carbonate urethane) Elastomers with Novel Soft", MACROMOLECULES, vol. 42, JPN6018012708, 2009, pages 8322 - 8327, ISSN: 0004384595
Attorney, Agent or Firm:
Hidewa Patent Office