JP2006113313A5

JP2006113313A5 -

Info

Publication number: JP2006113313A5
Application number: JP2004300918A
Authority: JP
Filing date: 2004-10-15
Publication date: 2007-11-29
Anticipated expiration: 2024-10-15

Claims

In a nonmagnetic toner obtained by externally adding a charge control agent (b) to toner particles comprising at least a binder resin, a colorant, a charge control agent (a), and a polymer having a sulfur atom,
The charge control agent (a) is a metal compound of oxycarboxylic acid,
The charge control agent (b) is a compound of a metal M selected from any one of Al, Zn, Zr, Fe, and B of oxycarboxylic acid,
The polymer having a sulfur atom is a vinyl polymer containing the following general formula (1) of Mw = 20,000 to 50,000 as a structural unit,
When the toner is washed with an alkali, the mass part of the charge control agent (b) present on the toner surface, which is determined by the X-ray fluorescence reduction of the metal (M) derived from the charge control agent (b), is 0.007. ˜1.000 parts (toner mass basis),
Non-magnetic toner having an average circle shape degree of the toner is at 0.955 to 0.995, circularity standard deviation is equal to or less than 0.045.

[Wherein, R ₁ represents a hydrogen atom or a methyl group, R ₂ and R ₃ represents a hydrogen atom or an alkyl group. N represents an integer of 1 to 10, and X ₁ represents any _one of a hydrogen atom, a sodium atom, a potassium atom, and an ammonium group. ]

Mw of the polymer having a sulfur atom is Mw = 27000-45000, and the central metal M of the charge control agent (b) is a metal selected from any one of Al, Zn, and Zr, The nonmagnetic toner according to claim 1, wherein the average circularity is 0.970 to 0.995 and the circularity standard deviation is less than 0.035.

The total mass A (mg / g) of oxycarboxylic acid extracted from 1 g of the toner by a 0.1 mol / L sodium hydroxide aqueous solution is A = 0.5 to 7.0 mg / g (toner mass basis). The nonmagnetic toner according to claim 1, wherein the toner is a nonmagnetic toner.

The total mass A (mg / g) of oxycarboxylic acid extracted from 1 g of the toner with a 0.1 mol / L sodium hydroxide aqueous solution is A = 0.7 to 5.0 mg / g (based on the mass of the toner). The nonmagnetic toner according to claim 1, wherein the toner is a nonmagnetic toner.

The ratio (S / C) of atomic number% (S) of sulfur element to atomic number% (C) of carbon element present on the toner surface measured by X-ray photoelectron spectroscopy is 0.0005 to 0.0050. ,
The mass part of the charge control agent (a) present inside the toner, determined by the fluorescent X-ray dose of the metal (M2) derived from the charge control agent (a) detected after the toner is washed with an alkali, is 0.00. The non-magnetic toner according to claim 1, wherein the non-magnetic toner is 02 to 0.5 part (based on the mass of the toner).

The (S / C) relationship is 0.001 to 0.004 and exists in the toner, which is determined by the fluorescent X-ray dose of the metal (M2) derived from the charge control agent (a) detected after the alkali cleaning. 5. The nonmagnetic toner according to claim 1, wherein the charge control agent (a) has a mass part of 0.06 to 0.4 part (toner mass reference).

The toner is a toner used in a non-magnetic one-component developing system, and the surface potential (i) at the start of rotation of the toner carrying member at 10 seconds in an environment of 30 ° C. and 80% is (i) = − 5−− 45 V, the surface potential (ii) at 60 seconds is (ii) = − 5 to −50 V, and the relationship (i / ii) between (i) and (ii) is (i / ii) The nonmagnetic toner according to claim 1, wherein the nonmagnetic toner is 0.5 to 1.3.

The surface potential (i) is (i) = − 7 to −40V, the surface potential (ii) is (ii) = − 7 to −45V, and the (i / ii) is (i / The non-magnetic toner according to claim 1, wherein ii) = 0.7-1.

In an image forming method having a developing step of visualizing the electrostatic latent image by transferring toner to the electrostatic latent image carried on the image carrier by developing means,
The developing means includes a rotatable toner carrier that carries toner and is disposed opposite to the image carrier, and a toner regulating member that regulates the amount of toner on the toner carrier,
The toner is a non-magnetic toner obtained by externally adding a charge control agent (b) to toner particles comprising at least a binder resin, a colorant, a charge control agent (a), and a polymer having a sulfur atom,
The charge control agent (a) is a metal compound of oxycarboxylic acid,
The charge control agent (b) is a compound of a metal M selected from any one of Al, Zn, Zr, Fe, and B of oxycarboxylic acid,
The polymer having a sulfur atom is a vinyl polymer containing the following general formula (1) of Mw = 20,000 to 50,000 as a structural unit,
When the toner is washed with an alkali, the mass part of the charge control agent (b) present on the toner surface, which is determined by the X-ray fluorescence reduction of the metal (M) derived from the charge control agent (b), is 0.007. ˜1.000 parts (toner mass basis),
The image forming method of average circular shape of the said toner is characterized in that at 0.955 to 0.995, circularity standard deviation is less than 0.045.

[Wherein R ₁ represents a hydrogen atom or a methyl group, and R ₂ and R ₃ represent a hydrogen atom or an alkyl group. Further, n represents represent an integer of 1 to 10, X ₁ is a hydrogen atom, sodium atom, potassium atom, represents any of an ammonium group. ]

Mw of the polymer having a sulfur atom, an Mw = 2 7 000 to 45,000, the central metal M of the charge control agent (b) is a metal selected from one of Al · Zn · Zr, the The image forming method according to claim 9, wherein the toner has an average circularity of 0.970 to 0.995 and a circularity standard deviation of less than 0.035.

The total mass A (mg / g) of oxycarboxylic acid extracted from 1 g of the toner by a 0.1 mol / L sodium hydroxide aqueous solution is A = 0.5 to 7.0 mg / g (toner mass basis). The image forming method according to claim 9 or 10, wherein:

The total mass A (mg / g) of oxycarboxylic acid extracted from 1 g of the toner with a 0.1 mol / L sodium hydroxide aqueous solution is A = 0.7 to 5.0 mg / g (based on the mass of the toner). The image forming method according to claim 9 or 10, wherein:

The ratio (S / C) of atomic number% (S) of sulfur element to atomic number% (C) of carbon element present on the toner surface measured by X-ray photoelectron spectroscopy is 0.0005 to 0.0050. The mass part of the charge control agent (a) present inside the toner, determined by the fluorescent X-ray dose of the metal (M2) derived from the charge control agent (a) detected after the toner is washed with an alkali, is 0. The image forming method according to claim 9, wherein the amount is 0.02 to 0.5 part (based on the mass of the toner).

The (S / C) relationship is 0.001 to 0.004 and exists in the toner, which is determined by the fluorescent X-ray dose of the metal (M2) derived from the charge control agent (a) detected after the alkali cleaning. 13. The image forming method according to claim 9, wherein a mass part of the charge control agent (a) is 0.06 to 0.4 part (toner mass standard).

The toner is a toner used in a non-magnetic one-component developing system, and the surface potential (i) at the start of rotation of the toner carrying member at 10 seconds in an environment of 30 ° C. and 80% is (i) = − 5−− 45 V, the surface potential (ii) at 60 seconds is (ii) = − 5 to −50 V, and the relationship (i / ii) between (i) and (ii) is (i / ii) The image forming method according to claim 9, wherein = 0.5 to 1.3.

The surface potential (i) is (i) = − 7 to −40V, the surface potential (ii) is (ii) = − 7 to −45V, and the (i / ii) is (i / The image forming method according to claim 9, wherein ii) = 0.7-1.