JP2000199983A5

JP2000199983A5 -

Info

Publication number: JP2000199983A5
Application number: JP1999316770A
Authority: JP
Filing date: 1999-11-08
Publication date: 2005-04-07
Anticipated expiration: 2019-11-08

Claims

A two-component developer having at least a negatively chargeable toner having toner particles and an external additive and a magnetic fine particle dispersed resin carrier,
The magnetic fine particle dispersed resin carrier has composite particles containing at least inorganic compound particles and a binder resin,
The surface of the inorganic compound particles is one or more functional groups selected from the group consisting of epoxy groups, amino groups, mercapto groups, organic acid groups, ester groups, ketone groups, halogenated alkyl groups and aldehyde groups ( Treated with a lipophilic treatment agent having A) or a mixture thereof,
The surface of the composite particle is one or more of a coupling agent having one or more functional groups (B) different from the functional group (A) of the lipophilic treatment agent. Covered with
The functional group (B) of the coupling agent is a functional group selected from the group consisting of an epoxy group, an amino group, and a mercapto group,
A two-component developer, wherein the negatively chargeable toner has a weight average particle diameter of 3 to 9 μm.

The two-component developer according to claim 1, wherein the coupling agent covering the surface of the composite particle is a silane coupling agent.

The two-component developer according to claim 1 or 2 , wherein the coupling agent covering the surface of the composite particle is a silane coupling agent having at least an amino group.

Coated amount of the coupling agent coating the complex particle surface, according to any one of claims 1 to 3, characterized in that from 0.001 to 5.0 wt% with respect to the composite particles Two-component developer.

The two-component developer according to any one of claims 1 to 4 , wherein the composite particles are further coated with a resin on the surface thereof.

Complex particles are further coated the surface with a resin, in the coating amount is, any one of claims 1 to 4, characterized in that at least 0.05% by weight with respect to the composite particles The two-component developer described.

Complex particles, further the surface is covered with a resin, the coating amount is, any one of claims 1 to 4, characterized in that from 0.1 to 10 wt% with respect to the composite particles The two-component developer described in 1.

The two-component developer according to any one of claims 5 to 7 , wherein the resin further covering the surface of the composite particle is a silicone resin.

The two-component developer according to any one of claims 5 to 7 , wherein the resin further covering the surface of the composite particle is a silicone resin containing a coupling agent.

The two-component developer according to any one of claims 5 to 7 , wherein the resin further covering the surface of the composite particle is a silicone resin containing a silane coupling agent having an amino group.

A two-component developer having at least a negatively chargeable toner having toner particles and an external additive and a magnetic fine particle dispersed resin carrier,
The magnetic fine particle dispersed resin carrier has composite particles containing at least inorganic compound particles and a binder resin,
The surface of the inorganic compound particles is one or more functional groups selected from the group consisting of epoxy groups, amino groups, mercapto groups, organic acid groups, ester groups, ketone groups, halogenated alkyl groups and aldehyde groups ( Treated with a lipophilic treatment agent having A) or a mixture thereof,
The surface of the composite particles is coated with one or more resins having one or more functional groups (C) different from the functional groups (A) of the lipophilic agent. Has been
The functional group (C) of the resin is a functional group selected from the group consisting of an epoxy group, an amino group, an organic acid group, an ester group, a ketone group, a halogenated alkyl group, a hydroxy group, and a chloro group,
A two-component developer, wherein the negatively chargeable toner has a weight average particle diameter of 3 to 9 μm.

One or more functional groups selected from the group consisting of at least an epoxy group, an amino group, an organic acid group, an ester group, a ketone group, and a halogenated alkyl group as the resin coating the surface of the composite particle The two-component developer according to claim 11 , comprising (C).

The resin covering the surface of the composite particle has at least one or more functional groups (C) selected from the group consisting of epoxy groups, amino groups, and organic acid groups. The two-component developer according to claim 11 .

The two-component developer according to claim 11 , wherein the resin covering the surface of the composite particle has at least an amino group.

The two-component system development according to any one of claims 11 to 14 , wherein a coating amount of the resin coating the surface of the composite particle is 0.05% by mass or more based on the composite particle. Agent.

The coverage of the resin coating the complex particle surface, according to any one of claims 11 to 15, characterized in that 0.1 to 10.0 wt% with respect to the composite particles two Component developer.

The coverage of the resin coating the complex particle surface, according to any one of claims 11 to 15, characterized in that 0.2 to 5.0 wt% with respect to the composite particles two Component developer.

The two-component developer according to any one of claims 11 to 17 , wherein the composite particles are further coated with another resin on the surface thereof.

Complex particles further are covered the surface with another resin, the amount of coating, any one of claims 11 to 17, characterized in that 0.05% by mass or more with respect to the composite particles The two-component developer described in 1.

Complex particles, further the surface is covered with a resin, coating amount, to any one of claims 11 to 17, characterized in that from 0.1 to 10 wt% with respect to the composite particles The two-component developer described.

Resin for further covering the surface of the composite particles, two-component developer according to any one of claims 18 to 20, characterized in that a silicone resin.

Two-component developer according to any one of claims 18 to 20, wherein the resin further coating the surface of the composite particles is a silicone resin containing a coupling agent.

Resin for further covering the surface of the composite particles, two-component developer according to any one of claims 18 to 20, characterized in that a silicone resin containing a silane coupling agent having an amino group.

Two-component developer according to any one of claims 1 to 23, wherein the number average particle diameter of the external additive is 3 to 100 nm.

The two-component developer according to any one of claims 1 to 24, wherein the external additive has a BET specific surface area of 30 to 400 m ² / g.

The two-component developer according to any one of claims 1 to 24, wherein the external additive has a BET specific surface area of 50 to 400 m ² / g.

External additive, two-component developer according to any one of claims 1 to 26 characterized in that it is a complex of fine powder or metal oxide of the metal oxide.

External additive is hydrophobic silica fine powder, two-component developer according to any one of claims 1 to 26, characterized in that a hydrophobic titanium oxide fine powder or hydrophobic alumina fine powder.

External additive, the toner particles 100 parts by weight, two-component developer according to any one of claims 1 to 28, characterized in that it is 0.1 to 10.0 mass externally added .

The two-component developer according to any one of claims 1 to 28 , wherein the external additive is externally added in an amount of 0.5 to 5.0 parts by mass with respect to 100 parts by mass of the toner particles. .

The two-component developer according to any one of claims 1 to 30 , wherein the negatively chargeable toner has a weight average particle diameter of 4.5 to 8.5 µm.

The negatively chargeable toner has a distribution cumulative value less than or equal to ½ times the number average particle diameter of 20% by number or less, and a cumulative distribution value of more than twice the weight average particle diameter is less than or equal to 10% by volume. 32. The two-component developer according to any one of claims 1 to 31 .

The two-component developer according to any one of claims 1 to 32 , wherein the negatively chargeable toner has a shape factor SF-1 of 100 to 140.

The two-component developer according to any one of claims 1 to 32 , wherein the negatively chargeable toner has a shape factor SF-1 of 100 to 130.

The two-component developer according to any one of claims 1 to 34 , wherein the negatively chargeable toner contains 1 to 40 parts by mass of wax with respect to 100 parts by mass of the binder resin.

The negatively charged toner contains a wax having a ratio (Mw / Mn) of 1.45 or less of a weight average molecular weight (Mw) to a number average molecular weight (Mn). 35. The two-component developer according to any one of 35 .

2. The negatively chargeable toner contains a wax having a ratio (Mw / Mn) of a weight average molecular weight (Mw) to a number average molecular weight (Mn) of 1.30 or less. 35. The two-component developer according to any one of 35 .

38. The two-component developer according to any one of claims 1 to 37 , wherein the negatively chargeable toner contains a metal compound of an aromatic hydroxycarboxylic acid.

The two-component developer according to any one of claims 1 to 38 , wherein the toner particles are polymerized toner particles produced by a polymerization method.

The surface of the inorganic compound particles is at least treated with a lipophilic agent having one or more functional groups (A) selected from the group consisting of an epoxy group, an amino group and a mercapto group. 40. The two-component developer according to any one of claims 1 to 39 .

The two-component developer according to any one of claims 1 to 39 , wherein the surface of the inorganic compound particles is at least treated with a lipophilic treatment agent having an epoxy group.

The two-component developer according to any one of claims 1 to 41 , wherein the oleophilic treatment agent is a coupling agent.

The two-component developer according to any one of claims 1 to 41 , wherein the oleophilic treatment agent is a silane coupling agent.

Inorganic compound particles is, with respect to the inorganic compound particles, two-component according to any one of claims 1 to 43, characterized in that it is treated with 0.1 to 5.0 wt% of the lipophilic-treating agent Developer.

The two-component developer according to any one of claims 1 to 44 , wherein the binder resin is a thermosetting resin.

The two-component developer according to any one of claims 1 to 45 , wherein the binder resin is a thermosetting resin containing at least a phenol resin.

The weight average particle diameter of the magnetic fine particle-dispersed resin carrier, two-component developer according to any one of claims 1 to 46, characterized in that a 10 to 50 [mu] m.

The weight average particle diameter of the magnetic fine particle-dispersed resin carrier, two-component developer according to any one of claims 1 to 46, characterized in that a 15 to 45 m.

The magnetic fine particle-dispersed resin carrier has a true specific gravity of 2.5 to 4.5 and a magnetization intensity (σ ₁₀₀₀ ) measured under a magnetic field of 79.6 kA / m (1 kOe) is 15 to 60 Am ² / kg. (Emu / g), residual magnetization (σγ) is 0.1 to 20 Am ² / kg, and resistivity value is 5 × 10 ^{11 to} 5 × 10 ¹⁵ Ωcm. 48. The two-component developer according to any one of 48 .

The two-component developer according to any one of claims 1 to 49 , wherein the magnetic fine particle dispersed resin carrier has a shape factor SF-1 of 100 to 130.

The two-component developer according to any one of claims 1 to 49 , wherein the magnetic fine particle dispersed resin carrier has a shape factor SF-1 of 100 to 120.

The two-component developer according to any one of claims 1 to 51 , wherein the inorganic compound particles contain at least magnetic fine particles.

The two-component developer according to any one of claims 1 to 51 , wherein the inorganic compound particles contain magnetic fine particles and a nonmagnetic inorganic compound.

54. The two-component developer according to claim 53 , wherein a <b, where a is the number average particle diameter of the magnetic fine particles and b is the number average particle diameter of the nonmagnetic inorganic compound particles.

55. The two-component developer according to claim 54 , wherein a is 0.02 to 2 [mu] m, b is 0.05 to 5 [mu] m, and 1.5a <b.

54. The two-component developer according to claim 53 , wherein the inorganic compound particles contain a magnetic iron compound and a non-magnetic iron oxide.

Inorganic compound particles are two-component developer according to any one of claims 1 to 51, characterized in that it contains at least magnetic iron oxide.

58. The two-component developer according to claim 57 , wherein the magnetic iron oxide contains different kinds of oxides, hydroxides, or both.

58. The two-component developer according to claim 57 , wherein the different oxide or hydroxide is an oxide or hydroxide of silicon or aluminum.

The electrostatic image carrier is charged by a charging means, the charged electrostatic image carrier is exposed to form an electrostatic image on the electrostatic image carrier, and the electrostatic image is developed with a two-component developer. The toner image is formed on the electrostatic charge image carrier by developing by means, and the toner image on the electrostatic charge image carrier is transferred to the transfer material with or without the intermediate transfer member. An image forming method for fixing the toner image by a heat and pressure fixing means,
The two-component developer has at least a negatively chargeable toner having toner particles and an external additive and a magnetic fine particle dispersed resin carrier,
The magnetic fine particle dispersed resin carrier has composite particles containing at least inorganic compound particles and a binder resin,
The surface of the inorganic compound particles is one or more functional groups selected from the group consisting of epoxy groups, amino groups, mercapto groups, organic acid groups, ester groups, ketone groups, halogenated alkyl groups and aldehyde groups ( Treated with a lipophilic treatment agent having A) or a mixture thereof,
The surface of the composite particle is one or more of a coupling agent having one or more functional groups (B) different from the functional group (A) of the lipophilic treatment agent. Covered with
The functional group (B) of the coupling agent is a functional group selected from the group consisting of an epoxy group, an amino group, and a mercapto group,
An image forming method, wherein the negatively chargeable toner has a weight average particle diameter of 3 to 9 μm.

The electrostatic image carrier is charged by a charging means, the charged electrostatic image carrier is exposed to form an electrostatic image on the electrostatic image carrier, and the electrostatic image is developed with a two-component developer. The toner image is formed on the electrostatic charge image carrier by developing by means, and the toner image on the electrostatic charge image carrier is transferred to the transfer material with or without the intermediate transfer member. An image forming method for fixing the toner image by a heat and pressure fixing means,
The two-component developer has at least a negatively chargeable toner having toner particles and an external additive and a magnetic fine particle dispersed resin carrier,
The magnetic fine particle dispersed resin carrier has composite particles containing at least inorganic compound particles and a binder resin,
The surface of the inorganic compound is one or more functional groups selected from the group consisting of epoxy groups, amino groups, mercapto groups, organic acid groups, ester groups, ketone groups, halogenated alkyl groups and aldehyde groups (A ) Having a lipophilic treatment agent or a mixture thereof,
The surface of the composite particles is coated with one or more resins having one or more functional groups (C) different from the functional groups (A) of the lipophilic agent. Has been
The functional group (C) of the resin is a functional group selected from the group consisting of an epoxy group, an amino group, an organic acid group, an ester group, a ketone group, a halogenated alkyl group, a hydroxy group, and a chloro group,
An image forming method, wherein the negatively chargeable toner has a weight average particle diameter of 3 to 9 μm.

The developing means has a developing sleeve including a magnetic field generating means, and develops an electrostatic charge image with the two-component developer while applying an AC bias, a pulse bias, or a blank pulse bias to the developing sleeve. 62. The image forming method according to claim 60 or 61 , wherein the image forming method is an image forming method.

The magnetic field generating means is a fixed magnet, and the electrostatic charge image is developed under the condition that the strength of the magnetic field on the surface of the developing sleeve in the developing region is 39.8 to 79.6 kA / m (500 to 1000 Oe). 63. The image forming method according to claim 60, wherein:

Electrostatic charge image is a digital latent image, an image forming method according to any one of claims 60 to 63, characterized in that said digital latent image is developed by a reversal development method.

Electrostatic charge image bearing member, an image forming method according to any one of claims 60 to 64, characterized in that a photosensitive drum having an OPC photosensitive layer.

61. The image forming method according to claim 60, wherein the two-component developer is a two-component developer selected from any one of claims 2 to 10 and 24 to 59 .

62. The image forming method according to claim 61, wherein the two-component developer is a two-component developer selected from any one of claims 11 to 59 .