US 2021/0047463 A1Published application

Polycarbonate resin and method for manufacturing same

AssigneeTeijin Limited

InventorsHideyuki TSUNEMORI, Kenta IMAZATO, Takeshi FURUNO, Katsuhiro YAMANAKA

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Abstract

A polycarbonate resin containing a structural unit originating from a dihydroxy compound represented by formula (1), having a boric-acid content of 100 ppm or lower and/or a tertiary-amine content of 1000 ppm by weight or lower, and having a terminal phenyl group originating from a diester carbonate represented by formula (2), wherein the concentration of the terminal phenyl group is equal to or greater than 30 μeq/g. In formula (1), R1, R2, R3, and R4 each independently represent a hydrogen atom, a C1-C10 alkyl group, a C1-C10 alkoxy group, a C3-C20 cycloalkyl group, a C6-C20 cycloalkoxy group, a C6-C10 aryl group, a C7-C20 aralkyl group, a C6-C10 aryloxy group, a C7-C20 aralkyloxy group, or a halogen atom, and the cyclobutane ring indicates a cis-trans isomer mixture, a cis isomer alone, or a trans isomer alone. In formula (2), R5 and R6 each independently represent a substituted or non-substituted aromatic group.

Claims15

Dependent claims

A polycarbonate resin that includes a structural unit derived from a dihydroxy compound represented by the following formula (1), having a boric acid content of 100 ppm by weight or lower and/or a tertiary amine content of 1000 ppm by weight or lower, and that also has a terminal phenyl group derived from a carbonic acid diester represented by the following formula (2), wherein the terminal phenyl group concentration is 30 μeq/g or greater,

wherein R1, R2, R3 and R4 each independently represent a hydrogen atom, an alkyl group of 1 to 10 carbon atoms, an alkoxy group of 1 to 10 carbon atoms, a cycloalkyl group of 3 to 20 carbon atoms, a cycloalkoxy group of 6 to 20 carbon atoms, an aryl group of 6 to 10 carbon atoms, an aralkyl group of 7 to 20 carbon atoms, an aryloxy group of 6 to 10 carbon atoms, an aralkyloxy group of 7 to 20 carbon atoms or a halogen atom, and the cyclobutane ring represents a cis/trans isomer mixture, a cis isomer alone or a trans isomer alone,
wherein R5 and R6 each independently represent a substituted or unsubstituted aromatic group.

Dependencies are inferred from the claim text.