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US 5,707,769 AGranted
Yellow toner and magenta toner and image forming apparatus and method using same
AssigneeMinolta Co., Ltd.
InventorsMasayuki Hagi, Katsunori Kurose, Takeshi Arai, Junichi Tamaoki, Hiroyuki Fukuda, Yoko Osawa, Miyoko Goto
Life of this patent
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Abstract
A negatively chargeable color toner for full-color image forming, comprising a specific linear polyester resin and C. I. Solvent Yellow 162 or a specific anthraquinone magenta dye or an anthraquinone magenta dye together with a quinacridone magenta pigment.
Claims31
A yellow toner comprising:
- (a) a linear polyester resin produced by condensation polymerization of an alcohol component comprising an aromatic diol expressed by the following general formula I!:
- ##STR4## wherein R represents a ethylene radical or a propylene radical, x and y each represent an integer of 1 or more, and the average of x+y is in the range between 2 and 7, and an acid component;
- and
- (b) C. I. Solvent Yellow 162.
1 more element
A magenta toner comprising:
- (a) a linear polyester resin produced by condensation polymerization of an alcohol component comprising an aromatic diol expressed by the following general formula I!:
- ##STR5## wherein R represents a ethylene radical or a propylene radical, x and y each represent an integer of 1 or more, and the average of x+y is in the range between 2 and 7, and an acid component;
- and
- (b) a compound expressed by the following general formula II!:
- ##STR6## wherein R' represents a hydroxyalkyl group, an alkoxyalkyl group, an alkylaminosulfonyl group or an alkylcarboxyalkyl group.
2 more elements
A magenta toner comprising:
- (a) a linear polyester resin produced by condensation polymerization of an alcohol component comprising an aromatic diol expressed by the following general formula I!:
- ##STR7## wherein R represents a ethylene radical or a propylene radical, x and y each represent an integer of 1 or more, and the average of x+y is in the range between 2 and 7, and an acid component;
- and
- (b) an anthraquinone magenta dye;
- and
- (c) a quinacridone magenta pigment.
3 more elements
An image forming method comprising steps of:
- feeding a recording medium to an image forming station;
- forming a resin-formed image on the recording medium in the image forming station using a toner, said toner comprising:
- (a) a linear polyester resin produced by condensation-polymerization of an aromatic diol expressed by the following general formula I!:
- ##STR9## wherein R represents a ethylene radical or a propylene radical, x and y each represent an integer of 1 or more, and the average of x+y is in the range between 2 and 7, and an acid component;
- and
- (b) C. I. Solvent Yellow 162;
- feeding the recording medium to a fusing station from the image forming station;
- and
- fusing the image in order to fix the image on the recording medium permanently.
6 more elements
An image forming method comprising steps of:
- feeding a recording medium to an image forming station;
- forming a resin-formed image on the recording medium in the image forming station using a toner, said toner comprising:
- (a) a linear polyester resin produced by condensation polymerization of an alcohol component comprising an aromatic diol expressed by the following general formula I!:
- ##STR10## wherein R represents a ethylene radical or a propylene radical, x and y each represent an integer of 1 or more, and the average of x+y is in the range between 2 and 7, and an acid component;
- and
- (b) a compound expressed by the following general formula II!:
- ##STR11## wherein R' represents a hydroxyalkyl group, an alkoxylalkyl group, an alkylaminosulfonyl group or an alkylcarboxylalkyl group;
- feeding the recording medium to a fusing station from the image forming station;
- and
- fusing the image in order to fix the image on the recording medium permanently.
7 more elements
An image forming method comprising steps of:
- feeding a recording medium to an image forming station;
- forming a resin-formed image on a recording medium using a toner, said toner comprising:
- (a) a linear polyester resin condensation polymerization of an alcohol component comprising an aromatic diol expressed by the following general formula I!:
- ##STR12## wherein R represents a ethylene radical or a propylene radical, x and y each represent an integer of 1 or more, and the average of x+y is in the range between 2 and 7, and an acid component;
- (b) an anthraquinone magenta dye;
- and
- (c) a quinacridone pigment;
- feeding the recording medium to a fusing station from the image forming station;
- and
- fusing the image in order to fix the image on the recording medium permanently.
7 more elements
Dependencies are inferred from the claim text.