US 12,264,218 B2
Polycarbonate resin
Toshihito Goto, Ibaraki (JP); and Noriyoshi Ogawa, Ibaraki (JP)
Assigned to MITSUBISHI GAS CHEMICAL COMPANY, INC., Tokyo (JP)
Appl. No. 17/616,821
Filed by MITSUBISHI GAS CHEMICAL COMPANY, INC., Tokyo (JP)
PCT Filed Jun. 1, 2020, PCT No. PCT/JP2020/021591
§ 371(c)(1), (2) Date Dec. 6, 2021,
PCT Pub. No. WO2020/250732, PCT Pub. Date Dec. 17, 2020.
Claims priority of application No. 2019-108054 (JP), filed on Jun. 10, 2019.
Prior Publication US 2022/0306802 A1, Sep. 29, 2022
Int. Cl. C08G 64/08 (2006.01); C08J 3/09 (2006.01); C08J 5/18 (2006.01)
CPC C08G 64/081 (2013.01) [C08J 3/095 (2013.01); C08J 5/18 (2013.01); C08J 2369/00 (2013.01)] 10 Claims
 
1. A polycarbonate resin which is a copolymer consisting of a structural unit (A) represented by general formula (1) and a structural unit (B) represented by general formula (3), and comprises a terminal structure selected from a terminal structure represented by formula (T1) or a terminal structure represented by formula (T2), the molar ratio between the structural unit (A) and the structural unit (B) (A/B) being 45/55 to 95/5:

OG Complex Work Unit Chemistry
wherein in formula (T1):
RA represents an alkylene group having 1 to 20 carbon atoms or alkenylene group having 2 to 20 carbon atoms, which may have a substituent;
RB and RC each independently represent a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an alkoxy group having 1 to 10 carbon atoms or an aryl group having 6 to 12 carbon atoms;
Z represents an ether bond, a carbonyl group, an ester bond or a single bond;
a represents an integer of 1 to 3; and
* represents a position of bonding to the main chain of the polycarbonate resin,

OG Complex Work Unit Chemistry
wherein in formula (T2)):
RD represents hydrogen or an alkyl group having 1 to 6 carbon atoms;
RE represents an alkylene group having 1 to 6 carbon atoms;
RF represents a hydrogen atom or a methyl group;
RG represents a hydrogen atom or halogen; and
* represents a position of bonding to the main chain of the polycarbonate resin.