Three color toner kit and method of use
AssigneeCanon Kabushiki Kaisha
InventorsEiichi Imai, Motoo Urawa
Life of this patent
Estimating the term…
Abstract
By combination of a resin exhibiting a melt viscosity of 10.sup.5 cp at a temperature of T.sub.1 and a melt viscosity of 0.5.times.10.sup.5 cp at a temperature of T.sub.2, said temperatures satisfying the following relationships: T.sub.1 =100.degree.-150.degree. C., and .vertline..DELTA.T.vertline.=.vertline.T.sub.1 -T.sub.2 .vertline.=5.degree.-30.degree. C., and at least one of yellow, magenta and cyan colorants having specific structures, a color toner for electrostatic copying excellent in overlapping characteristic, spectral reflection characteristic, transparency, charging characteristic, durability, etc. can be obtained.
Claims3
A method for forming multi-color images by electrostatography, comprising:
- developing eloctrostatic latent images with a yellow toner, a magenta toner, and a cyan toner;
- transferring the resultant color toner images to a recording medium, and
- fixing the transferred toner images on the recording medium, thereby to obtain multi-color images;
- wherein said yellow, magenta and cyan toners respectively comprising 100 parts by weight of a resin exhibiting a melt flow viscosity of 10.sup.5 cp at a temperature of T.sub.1 and a melt flow viscosity of 0.5.times.10.sup.5 cp at a temperature of T.sub.2, said temperatures T.sub.1 and T.sub.2 satisfying the following relationships:
- T.sub.1 =100.degree. to 150.degree. C. and .DELTA.T=.vertline.T.sub.1 -T.sub.2 .vertline.=5
- to 30.degree. C., and 0.3 to 10 parts by weight of a corresponding color of colorants selected from the group consisting of yellow colorants, magenta colorants, and cyan colorants
- (A) said yellow colorants being:
- (1) colorants represented by the formula (I):
- ##STR10## Wherein R.sup.1 is a lower alkyl, R.sup.2 and R.sup.3 are each independently hydrogen or hydroxyl, R.sup.4 is hydrogen or hydroxyl and R.sup.5 is hydrogen, acyl, or amino having a terminal acyl;
- and
- (2) colorants to be classified under C.I. Disperse Yellow 164,
- (B) said magenta colorants being:
- (3) the colorant represented by the formula (II):
- ##STR11## and (4) colorants represented by the formula (III):
- ##STR12## wherein X is a substituent represented by the formula:
- ##STR13## R.sub.1 is hydrogen, alkyl, hydroxyl, phenyl or phenyl having a hydrogen, halogen or alkyl substituent, sulfo or any of salts thereof with alkali metals, alkaline earth metals, ammonium ion, aliphatic ammonium ion or heterocyclic ammonium ion;
- Z.sub.1 and Z.sub.2 are each independently hydrogen, hydroxy or alkyl,
- (C) said cyan colorants being:
- (5) colorants represented by formula (IV):
- ##STR14## wherein X.sub.1, X.sub.2, X.sub.3 and X.sub.4 are each independently:
- ##STR15## wherein R and R' are an alkylene having 1 to 5 carbon atoms, with the proviso that the number of hydrogen atoms in each of X.sub.1 -X.sub.4 is any of 0, 1, 2 and 3.
A color toner kit comprising, in combination, a yellow toner package containing a yellow toner, a magenta toner package containing a magenta toner and a cyan toner package containing a cyan toner;
- said yellow toner, magenta toner and cyan toner respectively comprising 100 parts by weight of a resin exhibiting a melt viscosity of 0.5.times.10.sup.5 cp at a temperature of T.sub.2, said temperatures T.sub.1 and T.sub.2 satisfying the following relationships:
- T.sub.1 =100-150.degree. C., and .vertline..DELTA.T.vertline.=.vertline.T.sub.1 -T.sub.2 .vertline.=5.degree.-30.degree. C.,
- and 0.3 to 10 parts by weight of at least one colorant selected from the group consisting of (A) yellow colorants, (B) magenta colorants and (C) cyan colorants,
- (A) said yellow colorants being:
- (1) colorants represented by the formula (I):
- ##STR16## wherein R.sup.1 is a lower alkyl, R.sup.2 and R.sup.3 are each independently hydrogen or hydroxyl, R.sup.4 is hydrogen or hydroxyl and R.sup.5 is hydrogen, acyl or an amino having a terminal acyl;
- and
- (2) colorants to be classified under C.I. Disperse Yellow 164,
- (B) said magenta colorants being:
- (3) the colorant represented by the formula (II):
- ##STR17## and (4) colorants represented by the formula (III):
- ##STR18## Wherein X is a substituent represented by the formula:
- ##STR19## R.sub.1 is hydrogen or alkyl;
- R.sub.2 is hydrogen, alkyl, hydroxyl, phenyl or phenyl having a substituent (any of hydrogen, halogen and alkyl), sulfo or any of salts thereof with alkali metals, alkaline earth metals, ammonium ion, aliphatic ammonium ion or heterocyclic ammonium ion;
- Z.sub.1 and Z.sub.2 are each independently hydrogen, hydroxy or alkyl,
- (C) said cyan colorants being:
- (5) colorants represented by the formula (IV):
- ##STR20## wherein X.sub.1, X.sub.2, X.sub.3 and X.sub.4 are each independently ##STR21## wherein R and R' are an alkylene having 1 to 5 carbon atoms, with the proviso that the number of hydrogen atoms in each of X.sub.1 -X.sub.4 is any of 0, 1, 2 and 3.
Dependencies are inferred from the claim text.