Fluorine-containing resin particle, composition, layer-shaped article, electrophotographic photoreceptor, process cartridge, and image forming apparatus

Patent metadata

Field	Value
Publication number	US-11333987-B2
Application number	US-201916700363-A
Country	US
Kind code	B2
Filing date	Dec 2, 2019
Priority date	Feb 7, 2019
Publication date	May 17, 2022
Grant date	May 17, 2022

Abstract

A fluorine-containing resin particle contains 0 or more and 30 or less carboxyl groups per 106 carbon atoms and 0 ppm or more and 3 ppm or less of a basic compound.

First claim

What is claimed is:

1. A fluorine-containing resin particle comprising:
7 or more and 30 or less carboxyl groups per 10 6 carbon atoms; and
0 ppm or more and 3 ppm or less of a basic compound,
wherein the fluorine-containing resin particles are selected from the group consisting of polytetrafluoroethylene (PTFE) particles, tetrafluoroethylene-hexafluoropropylene copolymer (FEP) particles, tetrafluoroethylene-perfluoro(alkyl vinyl ether) copolymer (PFA) particles, ethylene-tetrafluoroethylene copolymer (ETFE) particles, and ethylene-chlorotrifluoroethylene copolymer (ECTFE) particles, and
wherein the basic compound is an amine compound.

2. The fluorine-containing resin particle according to claim 1 , comprising:
7 or more and 20 or less carboxyl groups per 10 6 carbon atoms.

3. The fluorine-containing resin particle according to claim 1 , comprising:
7 or more and 20 or less carboxyl groups per 10 6 carbon atoms; and
0 ppm or more and 1.5 ppm or less of the basic compound.

4. The fluorine-containing resin particle according to claim 1 , wherein the amine compound has a boiling point of 40° C. or more and 130° C. or less.

5. The fluorine-containing resin particle according to claim 1 , comprising 0 ppb or more and 25 ppb or less of perfluorooctanoic acid.

6. The fluorine-containing resin particle according to claim 5 , comprising 0 ppb or more and 20 ppb or less of perfluorooctanoic acid.

7. The fluorine-containing resin particle according to claim 1 , wherein the fluorine-containing resin particle is obtained without performing irradiation during a production process.

8. A composition comprising:
fluorine-containing resin particles;
a binder resin; and
a charge transporting material,
wherein the fluorine-containing resin particles comprise:
0 or more and 30 or less carboxyl groups per 10 6 carbon atoms, and
0 ppm or more and 3 ppm or less of a basic compound.

9. The composition according to claim 8 , wherein the composition is liquid or solid.

10. A layer-shaped article comprising the fluorine-containing resin particle according to claim 1 .

11. The fluorine-containing resin particle according to claim 1 , wherein an average particle diameter of the fluorine-containing resin particle is from 0.2 μm to 4.5 μm, a BET specific surface area of the fluorine-containing resin particle is from 5 m 2 /g to 15 m 2 /g, and an apparent density of the fluorine-containing resin particle is from 0.2 g/ml to 0.5 g/ml.

12. The fluorine-containing resin particle according to claim 1 , wherein the fluorine-containing resin particle has a fluorine atom-containing dispersant attached to a surface thereof.

13. The fluorine-containing resin particle according to claim 12 , wherein the fluorine-containing dispersant is a fluorinated alkyl group-containing polymer having a structural unit represented by formula (FA) below:

wherein, in formulae (FA), each R F1 independently represents a hydrogen atom or an alkyl group, each Q F1 independently represents —O— or —NH—, fl represents an integer of 1 or more, each fp independently represents 0 or an integer of 1 or more, and each ft independently represents an integer of 1 or more and 7 or less.

14. The composition according to claim 8 , comprising:
7 or more and 20 or less carboxyl groups per 10 6 carbon atoms;
0 ppm or more and 1.5 ppm or less of the basic compound; and
0 ppb or more and 20 ppb or less of perfluorooctanoic acid,
wherein the fluorine-containing resin particles are selected from the group consisting of polytetrafluoroethylene (PTFE) particles, tetrafluoroethylene-hexafluoropropylene copolymer (FEP) particles, tetrafluoroethylene-perfluoro(alkyl vinyl ether) copolymer (PFA) particles, ethylene-tetrafluoroethylene copolymer (ETFE) particles, and ethylene-chlorotrifluoroethylene copolymer (ECTFE) particles, and
wherein the basic compound is an amine compound.

Assignees

• Fujifilm Business Innovation Corp

Inventors

• Yamada Wataru
• Iwasaki Masahiro
• Fujii Ryosuke
• Kusano Keisuke
• Okazaki Yuto
• FUKUI Taisuke

Classifications

• G03G21/1803

  Arrangements or disposition of the complete process cartridge or parts thereof · CPC title

• G03G15/75

  Details relating to xerographic drum, band or plate, e.g. replacing, testing (electrographic recording members per se G03G5/00) · CPC title

• C09D169/00

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

• C08L27/20

  Homopolymers or copolymers of hexafluoropropene · CPC title

• C08L27/18

  Homopolymers or copolymers or tetrafluoroethene · CPC title