Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Reexamination Certificate
2001-03-08
2004-06-29
Shosho, Callie (Department: 1714)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
C524S091000, C524S094000, C524S099000, C524S100000, C524S102000, C524S105000, C106S031470
Reexamination Certificate
active
06756424
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an aqueous coloring composition containing an oil-soluble dye, to an ink-jet ink, and to an ink jet recording method using the ink-jet ink, and in particular to a coloring composition that is excellent in color reproduction and suitable for aqueous ink, aqueous printing ink, information-recording ink and the like, as well as to an ink-jet ink and an ink jet recording method that are suitable for thermal, piezoelectric, electric field or acoustic ink jetting systems.
2. Description of the Related Art
As computers have spread in recent years, ink jet printers have been widely used for recording on paper, film, cloth and the like not only in offices but also in homes. As ink jet recording inks, oil-soluble inks, water-based inks and solid inks are known. Of these inks, water-based inks are advantageous in view of ease of production and handling, smell, safety and so on. Thus, water-based inks are mainly used.
The reason why water-soluble inks in water-based inks are used is that a water-soluble ink has advantages of ease of production of the ink, superior preservation stability, good color hue and high color density. However, water-soluble dye has poor water resistance, so that bleeding is caused if recording is carried out with the ink on plain paper. As a result, problems that recording quality deteriorates remarkably and light resistance is poor arise.
Thus, for example, Japanese Patent Application Laid-Open (JP-A) No. 56-157468, JP-A No. 4-18468, JP-A No. 10-110126 and JP-A No. 10-195355 suggest water-based inks containing a pigment or a dispersed dye in order to solve the above-mentioned problems.
The water resistance of these water-based inks is improved to some extent. However, it is difficult to say that water resistance is sufficient, and the following problems arise: a dispersant of the pigment or the dispersed dye in the water-based ink has insufficient preservation stability, such that an ink jet opening is easily blocked with the water-based ink; and the water-based inks in general have insufficient hue, and color reproducibility deteriorates because of the insufficient hue.
JP-A No. 58-45272, JP-A No. 6-340835, JP-A No. 7-268254, JP-A No. 7-268257 and JP-A No. 268260 suggest methods of causing a dye to be capsuled in urethane or polyester dispersant particles.
These methods however have the following problems: color reproducibility is insufficient because of insufficient color tone; and dispersion-stability and water resistance of the dye-capsuled polymer dispersant, when the dye is capsuled at a desired level, are not necessarily sufficient.
JP-A No. 11-286637 discloses ink-jet ink that contain as a cyan dye a phenol-type, naphthol-type or pyrrolotriazol-type azomethine. These inks are desirable in having improved light fastness, heat fastness, color reproducibility, dispersion stability of a dye dispersed product, and so on.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a coloring composition that is superior in water resistance, light resistance, preservation stability, color reproducibility, recording density, recording quality and the like, and can attain recording without dependency on kind of paper; an ink-jet ink containing the coloring composition; and an ink jet recording method using the ink-jet ink.
The above-mentioned object can be attained by the following means.
A first aspect of the present invention is an ink-jet ink, which includes a coloring composition including an oil-soluble dye represented by following general formula (I):
wherein A represents a group represented by general formula (II), R
3
-R
6
each independently represents a hydrogen atom or a substituent, M represents —OY or —N(R
7
)(R
8
), Y represents a hydrogen atom or a cation necessary for neutralizing charge of an oxygen ion, R
7
and R
8
each independently represents one of an alkyl group, aryl group, heterocyclic group, acyl group, alkylsulfonyl group, and arylsulfonyl group, R
7
and R
8
may be bonded to each other to form a ring, any of a pair R
4
and R
7
and a pair R
6
and R
8
may be bonded to each other to form a ring, any of a pair R
3
and R
4
and a pair R
5
and R
6
may be bonded to each other to form a ring, and general formula (II) is as follows:
wherein R
1
represents a hydrogen atom or a substituent, R
2
represents a substituent, Z
1
represents a group of non-metal atoms necessary for forming a 6-membered nitrogen-containing heterocycle, and * represents a bonding position.
A second aspect of the present invention is a coloring composition comprising an oil-soluble dye represented by following general formula (I):
wherein A represents a group represented by general formula (II), R
3
-R
6
each independently represents a hydrogen atom or a substituent, M represents —OY or —N(R
7
)(R
8
), Y represents a hydrogen atom or a cation necessary for neutralizing charge of an oxygen ion, R
7
and R
8
each independently represents one of an alkyl group, aryl group, heterocyclic group, acyl group, alkylsulfonyl group, and arylsulfonyl group, R
7
and R
8
may be bonded to each other to form a ring, any of a pair R
4
and R
7
and a pair R
6
and R
8
may be bonded to each other to form a ring, any of a pair R
3
and R
4
and a pair R
5
and R
6
may be bonded to each other to form a ring, and general formula (II) is as follows:
wherein R
1
represents a hydrogen atom or a substituent, R
2
represents a substituent, Z
1
represents a group of non-metal atoms necessary for forming a 6-membered nitrogen-containing heterocycle, and * represents a bonding position.
A third aspect of the present invention is an ink jet recording method wherein recording is performed using an ink-jet ink that includes a coloring composition including an oil-soluble dye represented by following general formula (I):
wherein A represents a group represented by general formula (II), R
3
-R
6
each independently represents a hydrogen atom or a substituent, M represents —OY or —N(R
7
)(R
8
), Y represents a hydrogen atom or a cation necessary for neutralizing charge of an oxygen ion, R
7
and R
8
each independently represents one of an alkyl group, aryl group, heterocyclic group, acyl group, alkylsulfonyl group, and arylsulfonyl group, R
7
and R
8
may be bonded to each other to form a ring, any of a pair R
4
and R
7
and a pair R
6
and R
8
may be bonded to each other to form a ring, any of a pair R
3
and R
4
and a pair R
5
and R
6
may be bonded to each other to form a ring, and general formula (II) is as follows:
wherein R
1
represents a hydrogen atom or a substituent, R
2
represents a substituent, Z
1
represents a group of non-metal atoms necessary for forming a 6-membered nitrogen-containing heterocycle, and * represents a bonding position.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The following will describe the coloring composition, the ink-jet ink and the ink jet recording method of the present invention in detail.
Coloring Composition
The coloring composition of the present invention includes an oil-soluble dye represented by the general formula (I). Hereinafter, the oil-soluble dye represented by the general formula (I) will be described.
Oil-soluble Dye Represented by the General Formula (I)
In the general formula (I), A represents a group represented by the general formula (II).
In the general formula (II), R
1
represents a hydrogen atom or a substituent. Specifically, examples thereof include a hydrogen atom; halogen atoms (for example, fluorine, chlorine and bromine); alkyl groups (straight-chain, branched-chain or cyclic alkyl groups having preferably 1-48 carbon atoms and more preferably 1-30 carbon atoms, for example, methyl, ethyl, propyl, butyl, octyl, dodecyl, hexadecyl, octadecy, isopropyl, 2-ethylhexyl, t-butyl, 1-adamantyl, cyclopropyl, cyclopentyl, cyclohexyl, and 1-norbornyl); alkenyl groups (alkenyl groups having preferably 2-48 carbon atoms and more preferably 2-30 carbon atoms, for example, vinyl, allyl, and 3-butene-1-yl); aryl groups (aryl
Kimura Keizo
Mizukawa Yuki
Burns Doane Swecker & Mathis L.L.P.
Shosho Callie
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