Toner

Patent metadata

Field	Value
Publication number	US-12504700-B2
Application number	US-202117520044-A
Country	US
Kind code	B2
Filing date	Nov 5, 2021
Priority date	Nov 12, 2020
Publication date	Dec 23, 2025
Grant date	Dec 23, 2025

Abstract

A toner comprising a toner particle comprising a binder resin, a hydrocarbon wax A, and an ester wax B, wherein assuming that a ratio of a peak intensity attributed to the hydrocarbon wax A to a peak intensity attributed to the binder resin in heating IR measurement in which the toner is held at 100° C. for 10 min is I, where an initial peak intensity ratio upon heating to 100° C. is denoted by I(ini) and a peak intensity ratio upon heating to 100° C. and holding for 10 min is denoted by I(10 min), the I(ini) and the I(10 min) satisfy a following formula (1):

I (ini)/ I (10 min)≤0.95  (1).

First claim

What is claimed is:

1 . A toner, comprising:
a toner particle, the toner particle comprising a binder resin, a hydrocarbon wax A, an ester wax B, and an inorganic particle C hydrophobized with a hydrophobizing treatment agent; the binder resin comprising at least 50% by mass of a monomer unit represented by formula (St)

ester wax B being ethylene glycol distearate or ethylene glycol dibehenate; and
the hydrophobizing treatment agent having an alkyl chain, wherein
the toner particle does not contain crystalline polyester,
−0.29≤Δ SP 1 −ΔSP 2≤0.08

0.41≤Δ SP 2≤1.00 and

0.10≤Δ SP 1≤0.82

where ΔSP1 is a difference between an SP value (SPa) (cal/cm 3 ) 1/2 of the hydrocarbon wax A and an SP value (SPc) (cal/cm 3 ) 1/2 of the alkyl chain, and ΔSP2 is a difference between an SP value (SPb) (cal/cm 3 ) 1/2 of the ester wax B and the SP value (SPa) of the hydrocarbon wax A,
I(ini)/I(10 min)≤0.95 when I is a peak intensity ratio of a peak intensity attributed to the hydrocarbon wax A to a peak intensity attributed to the binder resin in heating IR measurement in which the toner is held at 100° C. for 10 min, I(ini) is an initial peak intensity ratio upon heating to 100° C., and I(10 min) is a peak intensity ratio upon heating to 100° C. and holding for 10 min, and
I(10 min) is at least 0.30 and not more than 0.60.

2 . The toner according to claim 1 , wherein inorganic particle C is a magnetic body.

3 . The toner according to claim 1 , wherein ΔSP3≤1.05 when ΔSP3 is a difference between an SP value (SPb) (cal/cm 3 ) 1/2 of the ester wax B and an SP value (SPc) (cal/cm 3 ) 1/2 of the alkyl chain.

4 . The toner according to claim 1 , wherein the hydrophobizing treatment agent has an alkyl chain, and
an SP value (SPc) (cal/cm 3 ) 1/2 of the alkyl chain is 7.50 to 8.50.

5 . The toner according to claim 1 , wherein the hydrophobizing treatment agent comprises an alkyltrialkoxysilane coupling agent represented by formula (I)
C p H 2p+1 —Si—(OC q H 2q+1 ) 3   (I)
where p is an integer of 6 to 12, and q is an integer of 1 to 3.

6 . The toner according to claim 1 , wherein the toner particle comprises 5.0 to 35.0 parts by mass of ester wax B with respect to 100.0 parts by mass of binder resin in the toner particle.

7 . The toner according to claim 1 , wherein the toner particle comprises 3.0 to 15.0 parts by mass of hydrocarbon wax A with respect to 100.0 parts by mass of binder resin in the toner particle.

8 . A toner, comprising:
a toner particle, the toner particle comprising a binder resin, a hydrocarbon wax A, and an ester wax B, and an inorganic particle C hydrophobized with a hydrophobizing treatment agent; the binder resin comprising at least 50% by mass of a monomer unit represented by formula (St)

the toner particle comprising, as a resin component, only one resin selected from the group consisting of an amorphous polyester, a styrene acrylic copolymer, and a hybrid resin comprising an amorphous polyester segment and a vinyl polymer segment;
ester wax B being ethylene glycol distearate or ethylene glycol dibehenate; and
the hydrophobizing treatment agent having an alkyl chain, wherein
−0.29≤Δ SP 1−Δ SP 2≤0.08

0.41≤Δ SP 2≤1.00 and

0.10≤Δ SP 1≤0.82

where ΔSP1 is a difference between an SP value (SPa) (cal/cm 3 ) 1/2 of the hydrocarbon wax A and an SP value (SPc) (cal/cm 3 ) 1/2 of the alkyl chain, and ΔSP2 is a difference between an SP value (SPb) (cal/cm 3 ) 1/2 of the ester wax B and the SP value (SPa) of the hydrocarbon wax A,
I(ini)/I(10 min)≤0.95 when I is a peak intensity ratio of a peak intensity attributed to the hydrocarbon wax A to a peak intensity attributed to the binder resin in heating IR measurement in which the toner is held at 100° C. for 10 min, I(ini) is an initial peak intensity ratio upon heating to 100° C., and I(10 min) is a peak intensity ratio upon heating to 100° C. and holding for 10 min, and
I(10 min) is at least 0.30 and not more than 0.60.

9 . The toner according to claim 1 , wherein the hydrophobizing treatment agent is utilized in an amount of 0.3 to 2.0 parts by mass with respect to 100 parts by mass of untreated inorganic particles.

10 . The toner according to claim 5 , wherein the hydrophobizing treatment agent is utilized in an amount of 0.3 to 2.0 parts by mass with respect to 100 parts by mass of untreated inorganic particles.

11 . The toner according to claim 8 , wherein the resin component comprises only one resin selected from the group consisting of an amorphous polyester and a styrene acrylic copolymer.

Assignees

• Canon Kk

Inventors

• Nozaki Dai
• Fukudome Kosuke
• Uratani Kozue
• Mizuguchi Takuya
• Komiya Yuta
• Sugita Tomoko

Classifications

• G03G9/0821

  characterised by physical parameters (magnetic parameters G03G9/083) · CPC title

• G03G9/09716

  treated with organic compounds · CPC title

• G03G9/09708

  Inorganic compounds · CPC title

• G03G9/08

  with toner particles · CPC title

• G03G9/08702

  comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title