Polycarbonate copolymer, coating liquid using same, molded body, and electrophotographic photosensitive body

Patent metadata

Field	Value
Publication number	US-9551946-B2
Application number	US-201414893729-A
Country	US
Kind code	B2
Filing date	May 22, 2014
Priority date	May 27, 2013
Publication date	Jan 24, 2017
Grant date	Jan 24, 2017

Abstract

A polycarbonate copolymer includes: a repeating unit represented by a formula (1) below; and a repeating unit represented by a formula (2) below, in which the repeating unit represented by the formula (1) is formed from a bischloroformate oligomer having an average number of monomer units n represented by a formula (100) below in a range from 0.1 to 1.3. In the formulae (100) and (1), Ar 1 represents a group represented by a formula (3) below. In the formula (2), Ar 2 represents a divalent aromatic group. In the formula (3) below, X 1 represents a single bond or an oxygen atom. R 11 each independently represents a methyl group or an ethyl group.

First claim

The invention claimed is:

1. A polycarbonate copolymer comprising:
a repeating unit represented by a formula (1) below; and
a repeating unit represented by a formula (2) below, wherein
the repeating unit represented by the formula (1) is formed from a bischloroformate oligomer having an average number of monomer units n represented by a formula (100) below in a range from 1.0 to 1.3,

in the formulae (1) and (100), Ar 1 represents a group represented by a formula (3) below;
in the formula (2), Ar 2 represents a divalent aromatic group,

where: X 1 represents a single bond or an oxygen atom; and R 11 each independently represents a methyl group or an ethyl group, and
wherein the chain end of the polycarbonate copolymer is terminated by a monovalent terminal terminator selected from any one of the fluorine-containing alcohols below,

2. The polycarbonate copolymer according to claim 1 , wherein
provided that a mole percentage of total repeating units of the repeating unit represented by the formula (1) and the repeating unit represented by the formula (2) is defined as 100 mol %, a mole percentage of the repeating unit represented by the formula (1) is in a range from 52 mol % to 72 mol %, and a mole percentage of the repeating unit represented by the formula (2) is in a range from 28 mol % to 48 mol %, and
provided that total triads contained in a chain of the repeating units is defined as 100 mol %, a mole percentage of a triad that is three repeating units represented by the formula (1) in a row is 5 mol % or less, and Ar 2 is a group represented by a formula (4) below,

where: X 2 represents an oxygen atom or CR 3 R 4 ;
R 1 represents a hydrogen atom or a methyl group;
R 3 and R 4 each independently represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, or R 3 and R 4 form a ring to provide a substituted or unsubstituted cycloalkyl group having 5 to 6 ring carbon atoms; and
R 3 and R 4 are optionally the same group or different groups.

3. The polycarbonate copolymer according to claim 1 , wherein
Ar 1 in the formula (1) is a divalent group derived from a compound selected from the group consisting of 3,3′-dimethyl-4,4′-biphenol and bis(3-methyl-4-hydroxyphenyl)ether.

4. The polycarbonate copolymer according to claim 1 , wherein
Ar 2 in the formula (2) is a divalent group derived from a compound selected from the group consisting of bis(4-hydroxyphenyl)ether, 2,2-bis(4-hydroxyphenyl)butane and 1,1-bis(4-hydroxyphenyl)cyclohexane.

5. A coating liquid comprising: the polycarbonate copolymer according to claim 1 ; and an organic solvent.

6. A molding comprising the polycarbonate copolymer according to claim 1 .

7. An electrophotographic photoreceptor comprising:
a conductive substrate; and
a photosensitive layer provided on the conductive substrate,
the photosensitive layer comprising the polycarbonate copolymer according to claim 1 as a component.

Assignees

• Idemitsu Kosan Co

Inventors

• Hirata Kengo
• Morishita Hironobu

Classifications

• C08G64/14

  containing a chain-terminating or -crosslinking agent · CPC title

• G03G5/075 Primary

  obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds (G03G5/078 takes precedence) · CPC title

• G03G5/0564

  Polycarbonates · CPC title

• C08G64/06

  not containing aliphatic unsaturation · CPC title

• C09D169/00

  Coating compositions based on polycarbonates; Coating compositions based on derivatives of polycarbonates · CPC title