METHOD FOR PRODUCING POLYCARBONATE RESIN, AND MOLDED BODY

Title:

METHOD FOR PRODUCING POLYCARBONATE RESIN, AND MOLDED BODY

Document Type and Number:

WIPO Patent Application WO/2021/054300

Kind Code:

A1

Abstract:

The present invention addresses the problem of providing a new method for producing a polycarbonate resin having excellent properties.　This problem has been solved by providing a method for producing a polycarbonate resin containing a constituent unit derived from an aromatic dihydroxy compound represented by formula (1). The method has a polymerization step for polymerizing the aromatic dihydroxy compound represented by formula (1). In the polymerization step, a raw material substance is used in which the concentration of compounds represented by formula (2), which are impurities, is 80 ppm or less relative to the total weight of the aromatic dihydroxy compound represented by formula (1) and the compounds represented by formula (2). (In formula (1) and formula (2), R1 to R3, X, a, b, m and n are as described in the description of the present application.)

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Inventors:

ISHIKAWA SHUN (JP)

Application Number:

PCT/JP2020/034809

Publication Date:

March 25, 2021

Filing Date:

September 15, 2020

Export Citation:

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Assignee:

MITSUBISHI GAS CHEMICAL CO (JP)

International Classes:

C08G64/04; C08G64/20

Foreign References:

JP2011219636A	2011-11-04
JP2003286213A	2003-10-10
JP2003286213A	2003-10-10
JP4168646B2	2008-10-22

Other References: