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US 5,665,512 AGranted
Mono-component toner for developing an electrostatic latent image and developing method
AssigneeMinolta Co., Ltd.
InventorsChikara Tsutsui, Hiroyuki Fukuda, Junju Machida
Life of this patent
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Abstract
A mono-component toner comprises binder resin; a colorant; first charge controlling agent that has an amount of solubility between 10% and 50% by weight with respect to toluene; and a second charge control agent that includes nitrogen atom.
Claims42
A mono-component toner comprising:
- binder resin;
- a colorant;
- and
- a first charge control agent having negative chargeability and an amount of solubility between 10% to 50% by weight in toluene;
- and a second charge control agent, an amount of the first charge control agent being larger than that of the second charge control agent and a total amount of the first and second charge control agent being 1 part by weight to 7 parts by weight with respect to 100 parts by weight of the binder resin, said second charge control agent being selected from the group consisting of the following formula (A) and (B):
- ##STR9## wherein each of R1-R4 is a member selected from the group consisting of hydrogen atom, alkyl group, aryl group, aryl-alkyl group, alkenyl group, fluoride alkyl group having carbon atoms of 1-69 and fluorine atoms of 3-66 and fluoride alkenyl group having carbon atoms of 1-69 and fluorine atoms 3-66, with the proviso that at least one of R1-R4 is a fluoride alkyl group or a fluoride alkenyl group, said fluoride alkyl group and fluoride alkenyl group being unsubstituted or substituted with a member selected from the group consisting of hydroxyl group, chloromethyl group, carboxyl amide group, sulfonic amide group, urethane group, amine group, R5-O-R6 group and R7-C(O)-R8 wherein each of R5-R8 is an alkyl group having carbon atoms of 1-30;
- X is an organic anion or an inorganic anion;
- each of R9-R12 is a member selected from the group consisting of hydrogen atom, alkyl group, aryl group, aryl-alkyl group, alkenyl group, fluoride alkyl group having carbon atoms of 1-69 and fluorine atoms of 3-66 and fluoride alkenyl group having carbon atoms of 1-69 and fluorine atoms of 3-66, with the proviso that at least one of the R9-R12 representing the fluoride alkyl group or the fluoride alkenyl group, said fluoride alkyl group and fluoride alkenyl group being unsubstituted or substituted with a member selected from the group consisting of hydroxyl group, chloromethyl group, carboxyl amide group, sulfonic amide group, urethane group, amine group, R5--O--R6 group and R7--C(O)--R8;
- and
- Y is an organic anion or an inorganic anion.
7 more elements
A mono-component toner comprising:
- binder resin;
- a colorant;
- an anti-offset material of an amount of 1 part by weight to 4 parts by weight with respect to an amount of 100 parts by weight of the binder resin;
- a first charge control agent which has negative chargeability and an amount of solubility between 10% to 50% by weight with respect to toluene;
- and
- a second charge control agent which includes tertial ammonium salt, an amount of the first charge control agent being larger than that of the second charge control agent and a total amount of the first and second charge control agent being 1 part by weight to 7 parts by weight with respect to 100 parts by weight of the binder resin;
- wherein the toner has a mean particle, size by volume between 5 micro-meter to 9 micro-meter.
4 more elements
The mono-component toner comprising:
- binder resin;
- a colorant including carbon black which has pH value of 7 or less;
- a first charge control agent which has negative chargeability and an amount of solubility between 10% to 50% by weight with respect to toluene;
- and
- a second charge control agent which includes tertial ammonium salt, an amount of the first charge control agent being larger than that of the second charge control agent and a total amount of the first and second charge control agent being 1 part by weight to 7 parts by weight with respect to 100 parts by weight of the binder resin, wherein the toner has a mean particle size by volume between 5 micro-meter to 9 micro-meter.
2 more elements
Dependencies are inferred from the claim text.