Toner and method for producing toner

• US 10,088,765 B2
• Filed: 10/11/2017
• Issued: 10/02/2018
• Est. Priority Date: 10/17/2016
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Miyakai, Tomoyo, Ida, Hayato, Shibata, Takaho, Tamura, Junichi, Murayama, Ryuji, Yamashita, Daisuke, Hirasa, Takashi
• Primary Examiner(s): Le, Hoa V
• Application Number:
  US15/730,337
• Publication Number:
  US 20180107128A1
• Time in Patent Office: 356 Days
• CPC Class Codes: G03G 9/0804 whereby the components are brought together in a liquid dispersing medium
• CPC Class Codes: G03G 9/08704 Polyalkenes
• CPC Class Codes: G03G 9/08722 Polyvinylalcohols; Polyallylalcohols; Polyvinylethers; Polyvinylaldehydes; Polyvinylketones; Polyvinylketals
• CPC Class Codes: G03G 9/08724 Polyvinylesters
• CPC Class Codes: G03G 9/08726 Polymers of unsaturated acids or derivatives thereof
• CPC Class Codes: G03G 9/08728 Polymers of esters
• CPC Class Codes: G03G 9/08733 Polymers of unsaturated polycarboxylic acids
• CPC Class Codes: G03G 9/08795 characterised by their chemical properties, e.g. acidity, molecular weight, sensitivity to reactants

Abstract

A toner comprising a toner particle including a resin component, wherein the resin component includes an olefin resin and an olefin copolymer including a hydroxyl group, the olefin resin has a specific monomer unit Y1, the olefin copolymer including a hydroxyl group has a specific monomer unit Z1 and Z2, a hydroxyl value of the olefin resin is not more than 10 mg KOH/g, a hydroxyl value of the olefin copolymer including a hydroxyl group is at least 20 mg KOH/g and not more than 250 mg KOH/g, and a content of the olefin resin in the resin component is more than 50 mass % with respect to a total mass of the resin component.

Claims

1. A toner comprising a toner particle including a resin component,

wherein

the resin component includes an olefin resin and an olefin copolymer including a hydroxyl group,

the olefin resin has a monomer unit Y1 represented by a following formula (1),

the olefin copolymer including a hydroxyl group has a monomer unit Z1 represented by a following formula (2) and a monomer unit Z2 represented by a following formula (3),

a hydroxyl value of the olefin resin is not more than 10 mg KOH/g,

a hydroxyl value of the olefin copolymer including a hydroxyl group is at least 20 mg KOH/g and not more than 250 mg KOH/g, and

a content of the olefin resin in the resin component is more than 50 mass % with respect to a total mass of the resin component:

2. The toner according to claim 1, wherein

the olefin resin has a monomer unit Y1 represented by a following formula (1) and at least one monomer unit Y2 selected from the group consisting of a monomer unit represented by a following formula (4) and a monomer unit represented by a following formula (5);

and

a content of the monomer unit Y2 is at least 3 mass % and not more than 35 mass % with respect to a total mass of the olefin resin;

3. The toner according to claim 2, wherein where the total mass of the olefin resin is denoted by W, and masses of the monomer unit represented by formula (1), the monomer unit represented by formula (4) and the monomer unit represented by formula (5) are denoted by l, m, and n respectively, a value of (l+m+n)/W of the olefin resin is at least 0.80.

4. The toner according to claim 2, wherein the content of the monomer unit Y2 is at least 5 mass % and not more than 20 mass % with respect to the total mass of the olefin resin.

5. The toner according to claim 1, wherein a melting point of the olefin copolymer including a hydroxyl group is at least 90°

C. and not more than 150°

C.

6. The toner according to claim 1, wherein a softening point (Tm) of the olefin copolymer including a hydroxyl group is at least 100°

C. and not more than 150°

C.

7. The toner according to claim 1, wherein the resin component comprises an olefin copolymer including an acid group which has an acid value of at least 50 mg KOH/g and not more than 300 mg KOH/g.

8. The toner according to claim 1, wherein the content of the olefin copolymer including a hydroxyl group is at least 10 mass % and less than 50 mass % with respect to the total mass of the resin component.

9. The toner according to claim 1, wherein a softening point (Tm) of the olefin resin is at least 120°

C. and not more than 160°

C.

10. The toner according to claim 1, wherein

the toner particle includes an aliphatic hydrocarbon compound having a melting point of at least 50°

C. and not more than 100°

C.; and

a content of the aliphatic hydrocarbon compound is at least 1 part by mass and not more than 40 parts by mass with respect to 100 parts by mass of the resin component.

11. The toner according to claim 1, wherein

the toner particle includes a silicone oil;

and

a content of the silicone oil is at least 1 part by mass and not more than 20 parts by mass with respect to 100 parts by mass of the resin component.

12. The toner according to claim 1, wherein

the olefin resin includes an ethylene-vinyl acetate copolymer;

the olefin copolymer including a hydroxyl group includes an ethylene-Poval copolymer; and

an amount of the ethylene-vinyl acetate copolymer included in the resin component is more than 50 mass % with respect to the total mass of the resin component.

13. A method for producing a toner comprising a toner particle including a resin component,

the resin component including an olefin resin and an olefin copolymer including a hydroxyl group,

the method comprising a preparation step of preparing a resin fine particle dispersion in which resin fine particles for producing the resin component are dispersed in an aqueous medium, wherein

the olefin resin has a monomer unit Y1 represented by a following formula (1),

the olefin copolymer including a hydroxyl group has a monomer unit Z1 represented by a following formula (2) and a monomer unit Z2 represented by a following formula (3),

a hydroxyl value of the olefin resin is not more than 10 mg KOH/g,

a hydroxyl value of the olefin copolymer including a hydroxyl group is at least 20 mg KOH/g and not more than 250 mg KOH/g, and

a content of the olefin resin in the resin component is more than 50 mass % with respect to a total mass of the resin component:

14. The method for producing a toner according to claim 13, further comprising, after the preparation step of preparing the resin fine particle dispersion:

a aggregation step of aggregating the resin fine particles to form aggregated particles; and

a fusing step of heating and fusing the aggregated particles.

15. A toner comprising a toner particle including a resin component,

wherein

the resin component includes an olefin resin and an olefin copolymer including a hydroxyl group,

the olefin resin has a monomer unit Y1 represented by a following formula (1) and at least one monomer unit Y2 selected from the group consisting of a monomer unit represented by a following formula (4) and a monomer unit represented by a following formula (5),

the olefin copolymer including a hydroxyl group has a monomer unit Z1 represented by a following formula (2) and a monomer unit Z2 represented by a following formula (3),

a hydroxyl value of the olefin resin is not more than 10 mg KOH/g,

a content of the monomer unit Y2 is at least 3 mass % and not more than 35 mass % with respect to a total mass of the olefin resin,

a hydroxyl value of the olefin copolymer including a hydroxyl group is at least 20 mg KOH/g and not more than 250 mg KOH/g, and

a content of the olefin resin in the resin component is more than 50 mass % with respect to a total mass of the resin component: