Toner

Patent metadata

Field	Value
Publication number	US-12197170-B2
Application number	US-202117519938-A
Country	US
Kind code	B2
Filing date	Nov 5, 2021
Priority date	Nov 12, 2020
Publication date	Jan 14, 2025
Grant date	Jan 14, 2025

Abstract

A toner comprising a toner particle comprising a binder resin, and an ester wax A having a specific structure, wherein in a diffraction spectrum obtained by an X-ray diffractometer after the toner has been allowed to stand at 120° C. for 5 minutes and then at 60° C. for 5 minutes, assuming that a spectrum having a maximum peak in a range where 2θ is from 5.45° to 5.95° is P1 and an integrated intensity of the P1 is S1, and a spectrum having a maximum peak in a range where 2θ is from 21.45° to 21.95° is P2 and an integrated intensity of the P2 is S2, relationships of formulas (2) and (3) below are satisfied.

S 1/ S 2≤0.25  (2)

S 2≥1000  (3)

First claim

What is claimed is:

1. A toner, comprising:
a toner particle comprising a binder resin, and an ester wax A represented by formula (1)

where R 1 represents an ethylene group, and R 2 and R 3 independently represents a linear alkyl group having 11 to 25 carbon atoms, wherein
in a diffraction spectrum obtained by an X-ray diffractometer after the toner has been allowed to stand at 120° C. for 5 minutes and then at 60° C. for 5 minutes,
S1/S2≤0.25 and S2≥1000, when P1 is a spectrum having a maximum peak in a range where 20 is from 5.45° to 5.95°, an integrated intensity of P1 is S1, P2 is a spectrum having a maximum peak in a range where 2θ is from 21.45° to 21.95°, and S2 is an integrated intensity of P2.

2. The toner according to claim 1 , wherein the toner particle further comprises an ester wax B other than the ester wax A.

3. The toner according to claim 2 , wherein the ester wax B is a bifunctional to octafunctional ester wax.

4. The toner according to claim 2 , where ΔSP1 is 0.30 or less when ΔSP1 is an absolute value of a difference between an SP value (cal/cm 3 ) 1/2 of ester wax A and an SP value (cal/cm 3 ) 1/2 of ester wax B.

5. The toner according to claim 1 , wherein a content ratio of tetrahydrofuran insoluble matter in the resin contained in the toner is 20 to 80% by mass.

6. The toner according to claim 1 , wherein the toner has an storage elastic modulus E′(100) of 4.0×10 9 Pa to 6.5×10 9 Pa, obtained when a temperature is raised at 20° C./min in a powder dynamic viscoelasticity measurement of the toner is E′, and E′(100) is the storage elastic modulus E′ at 100° C.

7. The toner according to claim 1 , wherein the binder resin has a structure crosslinked by a crosslinking agent.

8. The toner according to claim 7 , wherein the toner particle further comprises an ester wax B other than the ester wax A, and M2/M1 is 0.10 or more when M1 is a molecular weight of the ester wax B and M2 is a molecular weight of the crosslinking agent is M2.

9. The toner according to claim 7 , wherein the crosslinking agent has at least two unsaturated double bonds and an alkylene glycol structure.

10. The toner according to claim 7 , wherein the crosslinking agent is represented by structural formula (6):

where m+n is an integer of 2 or more, R 11 and R 14 independently represent H or CH 3 , and R 12 and R 13 independently represent a hydrocarbon group having a linear or branched chain having 2 to 12 carbon atoms.

11. The toner according to claim 7 , wherein the crosslinking agent is represented by structural formula (8):

where p+q is an integer of 2 or more, and R 15 and R 16 independently represent H or CH 3 .

12. The toner according to claim 1 , wherein the binder resin comprises a styrene acrylic resin.

Assignees

• Canon Kk

Inventors

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

Classifications

• G03G9/08711

  with esters of acrylic or methacrylic acid · CPC title

• G03G9/08708

  Copolymers of styrene · CPC title

• G03G9/08795

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

• G03G9/08797

  characterised by their physical properties, e.g. viscosity, solubility, melting temperature, softening temperature, glass transition temperature · CPC title

• G03G9/08793

  Crosslinked polymers · CPC title