Title:
METHOD FOR PRODUCING POLYCARBONATE DIOL, POLYCARBONATE DIOL, AND TRANSESTERIFICATION CATALYST
Document Type and Number:
WIPO Patent Application WO/2023/140247
Kind Code:
A1
Abstract:
This method for producing a polycarbonate diol includes a step for obtaining a polycarbonate diol by subjecting a dihydroxy compound and a carbonic acid ester as raw material monomers to polycondensation by means of a transesterification reaction in the presence of a transesterification catalyst. The transesterification catalyst includes: a transesterification catalyst A1, which contains at least one type of metal (M1) selected from the group consisting of metals belonging to groups 6, 7, 8, 9, 10 and 11 of the long-form periodic table; and a transesterification catalyst A2, which contains at least one type of metal (M2) selected from the group consisting of metals belonging to groups 1 and 4 of the long-form periodic table.
Inventors:
MASUBUCHI TETSUO (JP)
Application Number:
PCT/JP2023/001174
Publication Date:
July 27, 2023
Filing Date:
January 17, 2023
Export Citation:
Assignee:
ASAHI CHEMICAL IND (JP)
International Classes:
C08G64/30; C08G18/44; B01J31/26
Foreign References:
| US5519108A | 1996-05-21 | |||
| JP2009235291A | 2009-10-15 | |||
| JP2021075717A | 2021-05-20 | |||
| JP2013010950A | 2013-01-17 | |||
| JP2013533861A | 2013-08-29 |
Attorney, Agent or Firm:
INABA, Yoshiyuki et al. (JP)
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