Toner and image-forming method
AssigneeCanon Kabushiki Kaisha
InventorsYasushi Katsuta, Manabu Ohno, Masanori Ito, Emi Tosaka
Life of this patent
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Abstract
A toner contains at least a binder resin, a colorant, a compound (A) and a compound (B) in which the compound (A) is selected from the specific compound group and the compound (B) is a derivative of any one of the compounds included in the group from which the compound (A) is selected. The total content A of the compound (A) and compound (B) in the toner is from 0.2% to 6% by weight based on the weight of the toner, and where the content of the cross-linking agent component in the binder resin is represented by B % by weight based on the weight of the toner, the following relationship is satisfied: 0.1≦A/B≦70.
Claims25
A toner which comprises i) a binder resin containing a cross-linking agent component, ii) a colorant, iii) a compound (A) and iv) a compound (B);
- said compound (A) being a compound selected from the group consisting of abietic acid, dehydroabietic acid, dihydroabietic acid, neoabietic acid, pimaric acid, isopimaric acid, levopimaric acid, pulstric acid, sandaracopimaric acid, secodehydroabietic acid and agathic acid;
- said compound (B) being a derivative of the compound included in the group from which said compound (A) is selected;
- and the total content A (% by weight:
- based on the weight of the toner) of said compound (A) and compound (B) in said toner being from 0.2% by weight to 6% by weight, and, where the content of said cross-linking agent component in said binder resin is represented by B (% by weight:
- based on the weight of the toner), satisfying the relationship of:
- 0.1≦A/B≦70.
An image-forming method which comprises (a) a charging step of charging electrostatically an image-bearing member for holding thereon an electrostatic latent image;
- (b) an exposure step of forming by exposure the electrostatic latent image on the image-bearing member thus charged;
- (c) a developing step of developing the electrostatic latent image by means of a toner held on the surface of a toner-carrying member, to form a toner image;
- (d) a transfer step of transferring the toner image formed on the surface of the image-bearing member, to a transfer material via, or not via, an intermediate transfer member;
- and (e) a fixing step of fixing the toner image transferred onto the transfer material, to the transfer material by a heating and pressing means;
- said toner being a toner which contains at least i) a binder resin containing a cross-linking agent component, ii) a colorant, iii) a compound (A) and iv) a compound (B);
- said compound (A) being a compound selected from the group consisting of abietic acid, dehydroabietic acid, dihydroabietic acid, neoabietic acid, pimaric acid, isopimaric acid, levopimaric acid, pulstric acid, sandaracopimaric acid, secodehydroabietic acid and agathic acid;
- said compound (B) being a derivative of the compound included in the group from which said compound (A) is selected;
- and the total content A (% by weight:
- based on the weight of the toner) of said compound (A) and compound (B) in said toner being from 0.2% by weight to 6% by weight, and, where the content of said cross-linking agent component in said binder resin is represented by B (% by weight:
- based on the weight of the toner), satisfying the relationship of:
- 0.1≦A/B≦70.
Dependencies are inferred from the claim text.