Toner and method for producing toner
AssigneeCanon Kabushiki Kaisha
InventorsDaisuke Yoshiba, Tsuneyoshi Tominaga, Takashi Matsui
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Abstract
A toner comprising a toner particle comprising a binder resin, wherein the binder resin has a side-chain crystalline polymer B having a monomer unit A made of at least one polymerizable monomer A selected from the group consisting of (meth)acrylic acid esters having a linear alkyl group having 18 to 36 carbon atoms, and the toner particle comprises boric acid.
Claims11
A toner comprising a toner particle comprising a binder resin and boric acid;
- the binder resin having a side-chain crystalline polymer B comprising a monomer unit A made of at least one polymerizable monomer A selected from the group consisting of (meth)acrylic acid esters having a linear alkyl group having 18 to 36 carbon atoms, wherein
- the toner comprises 0.8 to 6.0% by mass boric acid, and
- a half-value width of a peak corresponding to the side-chain crystalline polymer B which is measured by differential scanning calorimetry of the toner is not more than 1.85° C.
A method for producing a toner comprising a toner particle comprising a binder resin and boric acid, the method comprising the steps (1) to (3):
- (1) a dispersion step of preparing a dispersion liquid of resin fine particles comprising the binder resin comprising at least a side-chain crystalline polymer B having a monomer unit A derived from at least one polymerizable monomer A selected from the group consisting of (meth) acrylic acid esters having a linear alkyl group having 18 to 36 carbon atoms;
- (2) an aggregation step of mixing and aggregating at least the dispersion liquid of the resin fine particles to form aggregates;
- and
- (3) a fusion step of heating and fusing the aggregates, wherein
- boric acid is present in the dispersion liquid in at least one of steps (1) to (3),
- the toner comprises 0.8 to 6.0% by mass boric acid, and
- a half-value width of a peak corresponding to the side-chain crystalline polymer B which is measured by differential scanning calorimetry of the toner is not more than 1.85° C.
A method for producing a toner comprising a toner particle comprising a binder resin and boric acid, the method comprising the steps (1) to (3):
- (1) a dispersion step of preparing a dispersion liquid of resin fine particles comprising the binder resin comprising at least a side-chain crystalline polymer B having a monomer unit A derived from at least one polymerizable monomer A selected from the group consisting of (meth)acrylic acid esters having a linear alkyl group having 18 to 36 carbon atoms;
- (2) an aggregation step of mixing and aggregating at least the dispersion liquid of the resin fine particles to form aggregates;
- and
- (3) a fusion step of heating and fusing the aggregates, wherein borax is added to the dispersion liquid in at least one of steps (1) to (3),
- the toner comprises 0.8 to 6.0% by mass boric acid, and
- a half-value width of a peak corresponding to the side-chain crystalline polymer B which is measured by differential scanning calorimetry of the toner is not more than 1.85° C.
Dependencies are inferred from the claim text.