Polymerizable monomer, polymeric compound, charge control agent containing the polymeric compound, and developer bearing member and toner which contain the charge control agent

Patent metadata

Field	Value
Publication number	US-9250552-B2
Application number	US-201214006407-A
Country	US
Kind code	B2
Filing date	Mar 27, 2012
Priority date	Mar 30, 2011
Publication date	Feb 2, 2016
Grant date	Feb 2, 2016

Abstract

To provide a polymeric compound having superior charge-providing properties, the polymeric compound contains at least one unit represented by the following general formula (5).

In the general formula (5), R 1 represents a hydrogen atom or an alkyl group; R 2 to R 4 each represent a hydrogen atom, an alkyl group, an alkoxy group, a hydroxyl group or a halogen atom, or R 3 and R 4 may combine each other to form a ring; and A represents a divalent linking group.

First claim

The invention claimed is:

1. A polymerizable monomer, which is a compound selected from the group consisting of compounds represented by the following general formulas (2) to (4):

wherein R 1 represents a hydrogen atom or an alkyl group; R 2 to R 4 each represent a hydrogen atom, an alkyl group, an alkoxy group, a hydroxyl group or a halogen atom; and R 3 and R 4 may combine with each other to form a ring.

2. A polymeric compound containing at least one unit represented by the following general formula (5):

wherein R 1 represents a hydrogen atom or an alkyl group; R 2 to R 4 each represent a hydrogen atom, an alkyl group, an alkoxy group, a hydroxyl group or a halogen atom; R 3 and R 4 may combine with each other to form a ring; and A represents a divalent linking group.

3. The polymeric compound according to claim 2 , which is a copolymer having the unit represented by the general formula (5) and at least one unit represented by the following general formula (6):

wherein R 5 represents a hydrogen atom or an alkyl group; and R 6 represents a phenyl group, a carboxyl group, a carboxylate group or a carboxylic acid amide group.

4. The polymeric compound according to claim 3 , wherein R 6 represents a phenyl group or a carboxylate group.

5. The polymeric compound according claim 2 , which has a weight-average molecular weight of from 3,000 to 100,000.

6. A charge control agent comprising the polymeric compound according to claim 2 .

7. A developer bearing member comprising in an outermost surface layer thereof the charge control agent according to claim 6 .

8. A toner comprising a binder resin, a colorant and the charge control agent according to claim 6 .

9. The toner according to claim 8 , which is produced by a suspension polymerization process.

10. The toner according to claim 8 , which is produced by a suspension granulation process.

11. The polymeric compound according to claim 2 , wherein the unit represented by the following general formula (5) is at least one unit selected from the group consisting of units represented by the following general formulas (A) to (C):

Assignees

• Inoue Kei
• Murai Yasuaki
• Murayama Ryuji
• Sato Kazuyuki
• Kawakami Soichiro
• Hirose Masashi
• Canon Kk

Inventors

• Inoue Kei
• Murai Yasuaki
• Murayama Ryuji
• Sato Kazuyuki
• Kawakami Soichiro
• Hirose Masashi

Classifications

• C08F212/12

  Monomers containing a branched unsaturated aliphatic radical or a ring substituted by an alkyl radical · CPC title

• C07C311/51

  Y being a hydrogen or a carbon atom · CPC title

• G03G9/08735

  Polymers of unsaturated cyclic compounds having no unsaturated aliphatic groups in a side-chain, e.g. coumarone-indene resins · CPC title

• G03G9/09775 Primary

  containing atoms other than carbon, hydrogen or oxygen (G03G9/09741 - G03G9/09766 take precedence) · CPC title

• G03G9/08795

  characterised by their chemical properties, e.g. acidity, molecular weight, sensitivity to reactants · CPC title