WO2010035665A1 - 顔料分散液及びインクジェット記録用水性インク - Google Patents
顔料分散液及びインクジェット記録用水性インク Download PDFInfo
- Publication number
- WO2010035665A1 WO2010035665A1 PCT/JP2009/066121 JP2009066121W WO2010035665A1 WO 2010035665 A1 WO2010035665 A1 WO 2010035665A1 JP 2009066121 W JP2009066121 W JP 2009066121W WO 2010035665 A1 WO2010035665 A1 WO 2010035665A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pigment
- water
- compound
- reaction
- ink
- Prior art date
Links
- GPNABWJHGXVVIC-UHFFFAOYSA-N CC1CCC(CC(CCC2C)CC2c2c(C)ccc(Cc3ccc(C)cc3)c2)CC1 Chemical compound CC1CCC(CC(CCC2C)CC2c2c(C)ccc(Cc3ccc(C)cc3)c2)CC1 GPNABWJHGXVVIC-UHFFFAOYSA-N 0.000 description 1
- UANBPOPPAVQUOH-UHFFFAOYSA-N CCC1CC(CCCC2CC(C)(C)CC(C)(C)C2)CCC1 Chemical compound CCC1CC(CCCC2CC(C)(C)CC(C)(C)C2)CCC1 UANBPOPPAVQUOH-UHFFFAOYSA-N 0.000 description 1
- AFZZYIJIWUTJFO-UHFFFAOYSA-N CCc1cc(CC)ccc1 Chemical compound CCc1cc(CC)ccc1 AFZZYIJIWUTJFO-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/2805—Compounds having only one group containing active hydrogen
- C08G18/2815—Monohydroxy compounds
- C08G18/282—Alkanols, cycloalkanols or arylalkanols including terpenealcohols
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D17/00—Pigment pastes, e.g. for mixing in paints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/0804—Manufacture of polymers containing ionic or ionogenic groups
- C08G18/0819—Manufacture of polymers containing ionic or ionogenic groups containing anionic or anionogenic groups
- C08G18/0823—Manufacture of polymers containing ionic or ionogenic groups containing anionic or anionogenic groups containing carboxylate salt groups or groups forming them
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
- C08G18/751—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring
- C08G18/752—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group
- C08G18/753—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group
- C08G18/755—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
- C08G18/758—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing two or more cycloaliphatic rings
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
- C08G18/7621—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring being toluene diisocyanate including isomer mixtures
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/80—Masked polyisocyanates
- C08G18/8003—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen
- C08G18/8048—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen with compounds of C08G18/34
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
- C09B67/006—Preparation of organic pigments
- C09B67/0066—Aqueous dispersions of pigments containing only dispersing agents
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
- C09B67/006—Preparation of organic pigments
- C09B67/0066—Aqueous dispersions of pigments containing only dispersing agents
- C09B67/0067—Aqueous dispersions of phthalocyanine pigments containing only dispersing agents
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
- C09B67/0071—Process features in the making of dyestuff preparations; Dehydrating agents; Dispersing agents; Dustfree compositions
- C09B67/0084—Dispersions of dyes
- C09B67/0085—Non common dispersing agents
- C09B67/009—Non common dispersing agents polymeric dispersing agent
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/32—Inkjet printing inks characterised by colouring agents
- C09D11/322—Pigment inks
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/32—Inkjet printing inks characterised by colouring agents
- C09D11/324—Inkjet printing inks characterised by colouring agents containing carbon black
- C09D11/326—Inkjet printing inks characterised by colouring agents containing carbon black characterised by the pigment dispersant
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/32—Inkjet printing inks characterised by colouring agents
- C09D11/328—Inkjet printing inks characterised by colouring agents characterised by dyes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D17/00—Pigment pastes, e.g. for mixing in paints
- C09D17/001—Pigment pastes, e.g. for mixing in paints in aqueous medium
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/10—Homopolymers or copolymers of methacrylic acid esters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
Definitions
- the present invention relates to a water-based ink for inkjet recording using a pigment as a coloring material.
- a dye ink using a dye as a coloring material has been used as a water-based ink for inkjet recording.
- Dye inks have many advantages such as excellent storage stability, hardly clogging the nozzles of inkjet printers, and the printed matter obtained has excellent gloss.
- defects derived from dyes such as inability to store printed matter for a long time due to poor weather resistance, and poor water resistance and light resistance.
- weather resistance, water resistance and light resistance have been pointed out.
- Development of a water-based ink for ink-jet recording (hereinafter abbreviated as water-based pigment ink) using an excellent pigment is underway.
- the aqueous pigment ink is usually a pigment dispersion in which pigment particles are uniformly dispersed in an aqueous solvent such as water. After recording, an ink film containing the pigment particles is formed on the recording medium.
- the image quality of the recorded matter by the aqueous pigment ink is greatly influenced by the coloration and gloss of the pigment particles themselves in this ink film, and when using a recording medium in which the recording surface is processed smoothly like glossy paper, There has been a problem that the color developability and glossiness of the recording portion are impaired due to irregular reflection of light by pigment particles in the ink film. There is also a problem that the fixing property to the recording medium is insufficient and the formed image has poor abrasion resistance.
- ink jet printing is performed by ejecting ink droplets from a printer head.
- the thermal method boils the ink in the nozzle with the heater of the heating resistor arranged in the printer head and blows ink droplets. Due to the rapid temperature change, a phenomenon called kogation occurs in the heater portion, which causes a problem that liquid does not discharge (non-ejection) during long-time printing. Therefore, ejection stability is also required for the ink used.
- water-based pigment inks containing a resin component are being studied in order to improve fixability and gloss on recording media, and water-based inks for ink-jet recording to which water-based polyurethane is added are known to satisfy the physical properties to some extent. It has been.
- an inkjet recording liquid containing an acetylene glycol type hydrophobic diol known as a surfactant and a polyurethane using a carboxy group-containing diol as a raw material see, for example, Patent Document 1
- An ink composition for ink jet recording for example, refer to Patent Document 2
- an ink composition for ink jet recording including a self-dispersing pigment and a polyurethane dispersion for example, refer to Patent Document 3
- the ink jet recording liquid described in Patent Document 1 has a problem that the gloss and printing durability of a printed matter are inferior particularly when glossy paper is used as a recording medium.
- the ink composition for inkjet recording described in Patent Document 2 has low ejection stability, and the printed matter obtained has poor scratching properties.
- the ink composition for inkjet recording described in Patent Document 3 has ejection stability. There was a problem that was inferior. Japanese Patent Laid-Open No. 06-279718 JP 2004-300703 A JP 2005-515289 A
- the problem to be solved by the present invention is that ink droplets can be stably ejected even during long-time printing in a thermal ink jet printer, and a printed image having excellent weather resistance, particularly abrasion resistance can be obtained.
- the object is to provide a water-based ink for ink-jet recording.
- Patent Document 1 describes a block-type urethane oligomer, but the position of the carboxy group is not specified for the purpose of controlling the oligomer segment.
- Patent Document 3 discloses an aqueous polyurethane dispersion synthesized through an adduct of an acid group-containing diol containing a carboxy group-containing diol and a diisocyanate compound, but there is no description of a method for synthesizing the adduct.
- the present inventors have found that the carboxy group introduced at random in this way has a great influence on the discharge property.
- the amount of carboxy groups introduced into the molecular chain that occurs during polymerization is non-uniform.
- the amount of carboxy group introduced per molecular chain itself is theoretically reduced, so that a molecular chain in which no carboxy group is introduced may occur. That is, even if the degree of aqueousity is predicted in advance and the amount of raw material monomer charged is determined, some molecular chains of the resulting polyurethane become water-insoluble, so that the solubility partially decreases.
- an isocyanate group and a part of the carboxy group undergo a crosslinking reaction during polymerization to produce an unnecessary gel component in water, the molecular weight becomes larger than expected, or the crosslinked carboxy group does not function as a water dispersion stable group. Water solubility with respect to the charged amount is reduced.
- the present inventors have also found that these phenomena, and the ink ejection stability and printability are greatly reduced by these phenomena.
- the present invention is a pigment dispersion containing water, an aqueous polymer, and a pigment as essential components, wherein the aqueous polymer has a diol compound (A) having one or two carboxy groups in one molecule and a diisocyanate compound.
- a reaction product comprising a compound represented by general formula (1) reacted with (B) as a main component and a reaction index calculated by (formula 1) within a range of 0.95 to 1.10.
- a diol compound (C) or a pigment dispersion which is a carboxy group-containing polyurethane obtained by reacting the reaction product, the diol compound (C) and a diisocyanate compound (D).
- R 1 and R 3 represent a partial structure excluding the isocyanate group of the diisocyanate compound (B), R 1 and R 3 may be the same or different, and R 2 is And represents a partial structure excluding the hydroxy group of the diol compound (A) having one or two carboxy groups in one molecule.
- the present invention also provides a water-based ink for ink jet recording using the pigment dispersion described above.
- the present invention also relates to a method for producing an aqueous polymer for use in a pigment dispersion containing water, an aqueous polymer, and a pigment as essential components, and the diol compound (A) having one or two carboxy groups in one molecule.
- the diisocyanate compound (B) are reacted, and the reaction is stopped when the reaction index calculated by (Formula 1) falls within the range of 0.95 to 1.10.
- a reaction product comprising a compound as a main component is produced, and then the reaction product and the diol compound (C) are reacted, or the reaction product, the diol compound (C) and the diisocyanate compound (D) are reacted.
- a method for producing a polymer is provided.
- R 1 and R 3 represent a partial structure excluding the isocyanate group of the diisocyanate compound (B), R 1 and R 3 may be the same or different, and R 2 is And represents a partial structure excluding the hydroxy group of the diol compound (A) having one or two carboxy groups in one molecule.
- ink droplets can be stably ejected even during long-time printing in a thermal ink jet printer, an image can be formed without streak unevenness or ink bleeding, and weather resistance, particularly resistance
- a water-based ink for ink jet recording from which a printed image having excellent rubbing properties can be obtained.
- the weight average molecular weight of the carboxy group-containing polyurethane is in the range of 10,000 to 50,000, the thermal type ejection properties are particularly excellent.
- the acid value of the carboxy group-containing polyurethane is 20 to 70 mgKOH / g, the ejection stability is excellent.
- the diol compound (A) to be used is dimethylolpropionic acid or dimethylolbutanoic acid, a carboxy group can be introduced almost according to the charged amount.
- the aqueous polymer used in the present invention is a compound represented by the general formula (1) obtained by reacting a diol compound (A) having one or two carboxy groups in one molecule with a diisocyanate compound (B).
- R 1 and R 3 represent a partial structure excluding the isocyanate group of the diisocyanate compound (B) described later, and R 1 and R 3 may be the same or different, and R 2 Represents a partial structure excluding the hydroxy group of the diol compound (A) having 1 or 2 carboxy groups in one molecule described later.
- Examples of the diol compound (A) having one or two carboxy groups in one molecule used in the present invention include esters obtained by reaction of polyhydric alcohols and polybasic acid anhydrides, and 2,2-dimethylol.
- Examples thereof include dihydroxyalkanoic acids such as lactic acid, 2,2-dimethylolpropionic acid, 2,2-dimethylolbutanoic acid and 2,2-dimethylolvaleric acid.
- Preferred compounds include 2,2-dimethylolpropionic acid and 2,2-dimethylolbutanoic acid. Among them, dimethylolpropionic acid or dimethylolbutanoic acid is preferable because it is easily available.
- diisocyanate compound (B) used in the present invention examples include aliphatic diisocyanate compounds such as hexamethylene diisocyanate and 2,2,4-trimethylhexamethylene diisocyanate, isophorone diisocyanate, hydrogenated xylylene diisocyanate, 4, Alicyclic diisocyanate compounds such as 4-cyclohexylmethane diisocyanate, aromatic aliphatic diisocyanate compounds such as xylylene diisocyanate and tetramethylxylene diisocyanate, aromatic diisocyanate compounds such as toluylene diisocyanate and phenylmethane diisocyanate Is mentioned.
- an aliphatic diisocyanate compound or an alicyclic diisocyanate compound is preferable from the viewpoint that light discoloration of a printed image hardly occurs.
- R 1 and R 3 are the same in the general formula (1).
- the partial structure represented by is preferable.
- R 2 is
- the partial structure represented by is preferable.
- the reaction index represented by (Formula 1) is an index where the product obtained by reacting the isocyanate group of the diisocyanate compound (B) with the hydroxyl group of the diol compound (A) at a molar ratio of 1: 1 is 1. I'll show you. That is, when the reaction index is less than 0.95, a large amount of unreacted diisocyanate compound (B) and diol compound (A) remain and react in the same system with the diol compound added in the next step. Therefore, the carboxy group cannot be uniformly introduced into the polyurethane. On the other hand, when the reaction index exceeds 1.10, the cross-linking reaction between the isocyanato group and the carboxy group proceeds, and a water-soluble property is greatly lowered because a cross-linked structure is formed.
- reaction product (1) a reaction product within the range of 1.10
- the diol compound (A) and the diisocyanate compound (B) have active hydrogen.
- the reaction solution is kept at 60 to 80 ° C. and allowed to react.
- Preferred solvents include dialkyl ethers, diesters, N-methylpyrrolidone, dimethylformamide, ketones, dioxane, acetic acid esters, halogenated aromatic compounds, and the like of glycol compounds.
- reaction index represented by (Equation 1) is within the range of 0.95 to 1.10.
- reaction index represented by (Equation 1) is within the range of 0.95 to 1.10.
- the reaction product (1) is obtained.
- a method for stopping the reaction since it is necessary to further react the isocyanate group and the diol compound later, a method of lowering the reaction temperature to a temperature at which the isocyanate substantially does not react, for example, 30 ° C. or less is preferable.
- the quantitative value of the isocyanato group can be determined by the method described in ISO 14896 (Testing method for isocyanate group content), and the reaction rate of the isocyanate group is the quantitative value of the isocyanate group of the reaction product before the reaction. It can be calculated from the value divided by the quantitative value. Specifically, it is obtained by the following formula.
- the crosslinking reaction between the isocyanato group and the carboxy group can be estimated from the change in the acid value before and after the reaction between the diisocyanate compound (B) and the diol compound (A).
- the molar ratio of the diol compound (A) and the diisocyanate compound (B) is preferably at least in the range of 1: 1.7 to 1: 2.2, particularly preferably 1: 2. .
- the molar ratio is less than 1.7, the content of the compound represented by the general formula (1) decreases, the monoisocyanate component in the reaction product (1) increases, and a carboxy group is introduced at the end of the polyurethane. The ratio may increase and water solubility may decrease.
- the diisocyanate compound (B) becomes excessive and the crosslinking reaction between the isocyanato group and the carboxy group easily proceeds.
- the content of the compound represented by the general formula (1) contained in the reaction product (1) is preferably at least 80% or more, particularly preferably 90% or more in terms of solid content ratio.
- the content of the compound represented by the general formula (1) contained in the reaction product (1) is less than 80%, that is, it indicates that the monoisocyanate component is large, and a carboxy group is introduced into the polyurethane terminal.
- the ratio may increase and water solubility may decrease.
- the reaction product (1) When the reaction product (1) is allowed to stand for a long time, the crosslinking reaction between the isocyanato group and the carboxy group proceeds to form a crosslinked polymer. Therefore, it is preferable to immediately react the next step, that is, the reaction product (1) and the diol compound (C), or the reaction product, the diol compound (C), and the diisocyanate compound (D).
- the diol compound (C) to be reacted with the reaction product (1) preferably has no carboxy group for the purpose of designing so that the carboxy group is uniformly introduced into the polymer chain of the polyurethane.
- carboxy group for the purpose of designing so that the carboxy group is uniformly introduced into the polymer chain of the polyurethane.
- it can be appropriately selected depending on the printability of the desired ink. For example, particularly when abrasion resistance is desired, it is preferable that a certain softness is imparted to the aqueous polymer to be used, and polyether polyol and polyester polyol are preferable.
- a high molecular weight diol compound should be used for the purpose of reducing the amount of urethane bond in one molecule. Is preferred.
- the molecular weight of the diol compound (C) is preferably in the range of 400 to 3000, and more preferably in the range of 500 to 2500, since the molecular weight of the diol compound (C) is preferably converted into the number average molecular weight because the polymer is too high. (The number average molecular weight in the present invention is measured by gel permeation chromatography and expressed as a value in terms of polystyrene.
- diol compounds (C) examples include polyester polyols, polyether polyols, polyhydroxy polycarbonates, polyhydroxy polyacetals, polyhydroxy polyacrylates, polyhydroxy polyester amides and polyhydroxy polythioethers. Of these, polyester polyol, polyether polyol and polyhydroxy polycarbonate are preferred. One of these diol compounds may be reacted, or several may be mixed and reacted. In addition to the high molecular diol compound, a low molecular weight diol compound may be used in combination as appropriate for the purpose of adjusting the film hardness of the printed matter. Examples include ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, 1,2-propanediol, 1,3-propanediol, 1,4-butanediol, and the like.
- the diisocyanate compound (D) the diisocyanate compound used for the above-mentioned diisocyanate compound (B) can be appropriately used.
- a chain extender can be used as necessary.
- the chain extender used here include ethylene glycol, propylene glycol, 1,4-butanediol, 1,6- Diols such as hexanediol, 1,9-nonanediol, 1,4-bis ( ⁇ -hydroxyethoxy) benzene, 1,4-cyclohexanediol, xylylene glycol, ethylenediamine, propylenediamine, xylylenediamine, isophoronediamine, One or more diamines such as 4,4′-diaminodiphenylmethane, tolylenediamine, and 4,4′-diaminodicyclohexylmethane can be used.
- the diol compound (C) and the diisocyanate compound (D) may be reacted by a known method.
- the reaction product (1) is reacted with the diol compound (C)
- the reaction product (1) and the diol compound (C) can be reacted by mixing and stirring in a solvent.
- the reaction product (1), the diol compound (C) and the diisocyanate compound (D) are reacted, the reaction product (1) and the diol compound (C) are mixed and stirred in a solvent.
- the diisocyanate compound (D) may be added, or the mixture of the diol compound (C) and the diisocyanate compound (D) and the reaction product (1) are mixed and stirred in a solvent and reacted. Also good. Further, the diol compound (C) can be added again for the purpose of increasing the molecular weight. Specifically, for example, the reaction is carried out in a solvent having no active hydrogen at 60 to 110 ° C. for 10 to 20 hours. At that time, a known urethanization catalyst such as dibutyltin dilaurate may be used.
- the obtained mixture of the carboxy group-containing polyurethane and the organic solvent is gradually phase-inverted from the oil phase to the water phase using water and a basic substance, and then the solvent is removed, whereby the aqueous polymer of the carboxy group-containing polyurethane and I can do it.
- basic substances used for phase inversion include ammonia, ethylamine, trimethylamine, triethylamine, triisopropylamine, tributylamine, triethanolamine, N-methyldiethanolamine, N-phenyldiethanolamine, monoethanolamine, dimethylethanol.
- Organic amines such as amine, diethylethanolamine, morpholine, N-methylmorpholine, 2-amino-2-ethyl-1-propanol, alkali metals such as lithium, potassium and sodium, inorganic alkalis such as sodium hydroxide and potassium hydroxide And the like.
- the amount of the basic substance used is appropriately set according to the physical properties of the carboxy group-containing polyurethane, but the amount of the basic substance used is not particularly limited, but usually 70 to 130% of the acid value of the polyurethane. The amount of basic material necessary to neutralize the is used.
- the carboxy group-containing polyurethane thus obtained has an acid value of 20 to 70 mgKOH / g, so that the prepared water-based ink for ink jet recording has good ejection stability, and good print quality such as abrasion resistance. Therefore, it is preferable.
- the carboxy group-containing polyurethane has a mass average molecular weight of preferably 10,000 to 50,000, more preferably 20,000 to 50,000. (The mass average molecular weight in the present invention is measured by gel permeation chromatography and expressed as a value in terms of polystyrene.
- Mw When Mw is less than 10,000, There is a possibility that the fixing property of the pigment to the recording medium becomes poor and the abrasion resistance of the printed image is lowered. On the other hand, when Mw exceeds 50,000, the viscosity of the prepared water-based ink for inkjet recording becomes high, and the ejection stability may be lowered.
- the aqueous polymer prepared from the carboxy group-containing polyurethane used in the present invention forms an aqueous dispersion.
- the particle size of the aqueous dispersion is preferably less than 50 nm. When the particle size is 50 nm or more, the dispersion stability of the aqueous dispersion is insufficient, and the carboxy group-containing polyurethane may precipitate from the ink and cause kogation when ink is ejected for a long time.
- the particle diameter can be measured by a known and common centrifugal sedimentation method, laser diffraction method (light scattering method), ESA method, capillary method, electron microscope method, or the like. Preferable is measurement by Microtrac UPA using a dynamic light scattering method.
- the amount of the carboxy group-containing polyurethane blended in the pigment dispersion of the present invention varies depending on the pigment blending ratio, but is preferably 20 to 200 parts by weight, more preferably 30 to 70 parts by weight with respect to 100 parts by weight of the pigment. Part.
- the blending amount of the carboxy group-containing polyurethane is small, the print quality such as abrasion resistance is lowered, and if the blending amount is too large, the ink ejection stability is lowered. There is.
- the water-based polymer is also characterized by exhibiting good pigment dispersibility and ejection stability without being affected by the type of pigment.
- pigments used for preparing the pigment dispersion include inorganic pigments such as barium sulfate, lead sulfate, titanium oxide, yellow lead, bengara, chromium oxide, and carbon black, anthraquinone pigments, perylene pigments, disazo pigments, and phthalocyanine pigments. , Isoindoline pigments, dioxazine pigments, quinacridone pigments, perinone pigments, benzimidazolone pigments, and the like. These can be used alone or in combination.
- the black pigment it is preferable to use furnace black, lamp black, acetylene black, channel black or other carbon black having excellent light resistance and high hiding power, titanium black, or the like.
- cyan pigments include C.I. I. Pigment Blue 1, C.I. I. Pigment Blue 2, C.I. I. Pigment blue 3, C.I. I. Pigment blue 15, C.I. I. Pigment blue 15: 1, C.I. I. Pigment blue 15: 3, C.I. I. Pigment blue 15: 4, C.I. I. Pigment blue 16, C.I. I. Pigment blue 22, C.I. I. Pigment blue 60, and the like.
- magenta pigments examples include C.I. I. Pigment Red 5, C.I. I. Pigment Red 7, C.I. I. Pigment Red 12, C.I. I. Pigment Red 48, C.I. I. Pigment Red 48: 1, C.I. I. Pigment Red 57, C.I. I. Pigment Red 112, C.I. I. Pigment Red 122, C.I. I. Pigment Red 123, C.I. I. Pigment Red 146, C.I. I. Pigment Red 168, C.I. I. Pigment Red 184, C.I. I. Pigment Red 202, C.I. I. Pigment Bio Red 19, etc.
- yellow pigments examples include C.I. I. Pigment Yellow 1, C.I. I. Pigment Yellow 2, C.I. I. Pigment Yellow 3, C.I. I. Pigment Yellow 12, C.I. I. Pigment Yellow 13, C.I. I. Pigment Yellow 14, C.I. I. Pigment yellow 16, C.I. I. Pigment Yellow 17, C.I. I. Pigment Yellow 73, C.I. I. Pigment Yellow 74, C.I. I. Pigment Yellow 75, C.I. I. Pigment Yellow 83, C.I. I. Pigment Yellow 93, C.I. I. Pigment Yellow 95, C.I. I. Pigment Yellow 97, C.I. I. Pigment Yellow 98, C.I. I.
- Pigment Yellow 109 C.I. I. Pigment Yellow 114, C.I. I. Pigment Yellow 128, C.I. I. Pigment Yellow 129, C.I. I. Pigment yellow 138, C.I. I. Pigment Yellow 151, C.I. I. Pigment yellow 154, C.I. I. Pigment yellow 155, and the like.
- the particle diameter of the pigment is preferably such that the primary particle diameter is in the range of 1 to 500 nm, and more preferably in the range of 20 to 200 nm. Further, the particle diameter of the pigment after being dispersed in the medium is preferably in the range of 10 to 300 nm, and more preferably in the range of 50 to 150 nm.
- the primary particle diameter of the pigment can be measured by an electron microscope, a gas or solute adsorption method, an air flow method, an X-ray small angle scattering method, and the like.
- the pigment particle diameter after dispersion can be measured by a known and common centrifugal sedimentation method, laser diffraction method (light scattering method), ESA method, capillary method, electron microscope method, or the like.
- the water used in the present invention may be water alone or a mixed solvent composed of a water-soluble organic solvent having compatibility between water and water.
- the water-soluble organic solvent include ketones such as acetone, methyl ethyl ketone, methyl butyl ketone, and methyl isobutyl ketone; methanol, ethanol, 2-propanol, 2-methyl-1-propanol, 1-butanol, and 2-methoxyethanol.
- Alcohols such as tetrahydrofuran, 1,4-dioxane, 1,2-dimethoxyethane, etc .; amides such as dimethylformamide, N-methylpyrrolidone, etc., and especially those having 3 to 6 carbon atoms It is preferable to use a compound selected from the group consisting of ketones and alcohols having 1 to 5 carbon atoms.
- pigment dispersing resin Since the carboxy group-containing polyurethane used in the present invention has the ability to disperse pigments, it may be used alone as a pigment-dispersing resin, or a resin used as a general-purpose pigment dispersant (hereinafter referred to as pigment dispersing agent). (Abbreviated as resin) can be used in combination. Alternatively, it can be used for vehicle purposes. When using together, there is no limitation in particular in the addition order of the carboxy group containing polyurethane and resin for pigment dispersion to be used, and it can change suitably according to the objective.
- the pigment dispersion of the present invention in which a pigment is dispersed with a carboxy group-containing polyurethane can be diluted with a solvent as it is to be used as an ink, or the pigment dispersion dispersed with a general-purpose pigment dispersion resin
- the carboxy group-containing polyurethane used in the invention may be added later to obtain the pigment dispersion of the present invention.
- the general-purpose pigment dispersion resin is preferably an aqueous resin suitable for preparing a pigment dispersion.
- Preferred examples include acrylic resins such as polyvinyl alcohols, polyvinyl pyrrolidones, and acrylic acid-acrylic acid ester copolymers.
- styrene-acrylic acid copolymer styrene-methacrylic acid copolymer, styrene-methacrylic acid-acrylic acid ester copolymer, styrene- ⁇ -methylstyrene-acrylic acid copolymer, styrene- ⁇ -methylstyrene
- a styrene-acrylic resin such as an acrylic acid-acrylic acid ester copolymer, a styrene-maleic acid copolymer, a styrene-maleic anhydride copolymer, a vinylnaphthalene-acrylic acid copolymer, and a salt of the aqueous resin.
- the compounds for forming the copolymer salt include alkali metal hydroxides such as sodium hydroxide, potassium hydroxide and lithium hydroxide, and diethylamine, ammonia, ethylamine, triethylamine, propylamine, isopropylamine, Examples include propylamine, butylamine, isobutylamine, triethanolamine, diethanolamine, aminomethylpropanol, and morpholine.
- the amount of the compound used to form these salts is preferably equal to or greater than the neutralization equivalent of the copolymer.
- These aqueous resins can be used alone or in admixture of two or more. In addition, there is no restriction
- the Mw of the pigment-dispersing resin is 6,000 to 20,000 in order to obtain a water-based ink that suppresses kogation in the heater portion and has excellent ejection stability. It is preferable that it exists in the range. If Mw is 6,000 or less, the dispersion stability of the water-based ink itself may be lowered. On the other hand, if it exceeds 20,000, the viscosity of the water-based ink tends to be high and the dispersion stability tends to be lowered. Further, kogation on the heater portion becomes severe, which may cause non-ejection of ink droplets from the nozzle tip of the thermal ink jet printer.
- the blending amount of the pigment dispersing resin is preferably 1 to 100 parts by mass, more preferably 2 to 70 parts by mass with respect to 100 parts by mass of the pigment.
- the acid value of the pigment dispersing resin is preferably 50 to 300 mgKOH / g.
- a salt of a styrene- (meth) acrylic acid copolymer from the viewpoint of more preferable dispersion stability and the like.
- carboxy group-containing polyurethane is added and adjusted to an aqueous dispersion dispersed in water with an acid copolymer salt, a print image having particularly excellent ink ejection properties and excellent abrasion resistance can be obtained. it can.
- the method for obtaining the pigment dispersion of the present invention is not particularly limited and can be carried out by a known method.
- the pigment dispersion of the present invention in which the pigment is dispersed with water or an aqueous solvent containing water with the carboxy group-containing polyurethane can be diluted with the solvent as it is and used as an ink.
- the carboxy group-containing polyurethane used in the present invention may be added later to the pigment dispersion dispersed in step (1), and the concentration may be adjusted with a solvent as necessary to obtain the pigment dispersion of the present invention.
- a stirring / dispersing device for dispersing the pigment for example, an ultrasonic homogenizer, a high-pressure homogenizer, a paint shaker, a ball mill, a roll mill, a sand mill, a sand grinder, a dyno mill, a dispermat, an SC mill, a nanomizer, and the like, various commonly known dispersions are used. You can use the machine.
- the pigment dispersion of the present invention is diluted with water or an aqueous solvent containing water, and a drying inhibitor, a penetrating agent, or other additives are added thereto as necessary. Prepare.
- the drying inhibitor gives an effect of inhibiting drying of the water-based ink for inkjet recording at the ink jet nozzle opening of the inkjet printer head.
- a water-soluble organic solvent having a boiling point equal to or higher than that of water is used.
- Water-soluble organic solvents that can be used as drying inhibitors include polyhydric alcohols such as ethylene glycol, diethylene glycol, polyethylene glycol, and glycerin, pyrrolidones such as N-methyl-2-pyrrolidone and 2-pyrrolidone, amides, and dimethyl sulfoxide. And imidazolidinone.
- the drying inhibitor is preferably used in an amount of 1 to 150 parts with respect to 100 parts of water.
- the penetrating agent is used for facilitating penetration of the water-based ink for ink jet recording, which is ejected from the ink ejecting nozzle of the ink jet printer head and adheres to the recording medium, into the recording medium.
- penetrating agent By using the penetrating agent, it is possible to obtain a recorded matter in which the aqueous solvent quickly penetrates into the recording medium and the image does not blur.
- penetrants used in the present invention include polyhydric alcohols such as ethylene glycol, 1,2,6-hexanetriol, thiodiglycol, hexylene glycol and diethylene glycol, diols such as pentanediol and hexanediol, and laurin.
- Glycol ethers such as propylene glycol, lower alkyl ethers of polyhydric alcohols such as diethylene glycol ethyl ether and triethylene glycol monoethyl ether, lower alcohols such as ethanol and isopropyl alcohol, glycol ethers such as diethylene glycol-N-butyl ether, propylene And water-soluble organic solvents such as glycol derivatives.
- polyhydric alcohols such as diethylene glycol ethyl ether and triethylene glycol monoethyl ether
- lower alcohols such as ethanol and isopropyl alcohol
- glycol ethers such as diethylene glycol-N-butyl ether
- propylene And water-soluble organic solvents such as glycol derivatives.
- the water-based ink for ink-jet recording of the present invention may contain a slight amount of a surfactant for the purpose of adjusting physical properties such as the surface tension of the ink.
- the surfactant is not particularly limited, and anionic surfactants such as alkylbenzene sulfonates and higher fatty acid salts, nonionic surfactants such as polyoxyethylene alkyl ethers and polyoxyethylene fatty acid esters, and other cationic surfactants.
- the surfactant may be appropriately selected from known and commonly used surfactants such as amphoteric surfactants. These surfactants can be used alone or in combination of two or more. Examples of other additives include antiseptics, antifungal agents, and chelating agents for preventing nozzle clogging.
- coarse particles are present in the water-based ink for ink jet recording, it may cause clogging of the ink jet nozzle of the ink jet printer. Therefore, it is preferable to remove the coarse particles by centrifugal separation or filtration after the dispersion treatment.
- the water-based ink for ink-jet recording of the present invention thus obtained is excellent in ink storage stability, excellent in dischargeability from the ink jet nozzle of the ink-jet printer head, and formed on a recording medium using the ink.
- the ink film has high density and gloss, and excellent abrasion resistance.
- ⁇ Quantification of acid value> 1.0 g of the sample solution is diluted with 10 g of methyl ethyl ketone, dissolved in 40 ml of a mixed solvent of toluene and methanol (toluene: methanol 7: 3), and then dissolved in a methanol solution of 0.1 N potassium hydroxide. Quantification was performed by neutralization titration using phenolphthalein as an indicator.
- Table 1 shows physical property values of the reaction products (1-1) to (1-5) and (ratio 1-1) to (ratio 1-2).
- a MEK solution of carboxy group-containing polyurethane A having a weight average molecular weight of 12,000 in terms of polystyrene was obtained.
- the obtained solution was neutralized with the same amount of sodium hydroxide as the charged amount of DMPA, water was added for phase inversion emulsification, MEK was removed by desolvation under reduced pressure, water was added, and the mass equivalent solid content 20 % Aqueous solution.
- the aqueous solution was colorless and transparent, and the particle size was less than 50 nm.
- Containing polyurethane B was obtained.
- the obtained resin solution was neutralized with the same amount of sodium hydroxide as DMPA in the charged amount, water was added for phase inversion emulsification, MEK was removed by desolvation under reduced pressure, water was added, and mass conversion solid content A 20% aqueous solution was obtained.
- the aqueous solution was colorless and transparent, and the particle size was less than 50 nm.
- the obtained resin solution was neutralized with the same amount of sodium hydroxide as DMPA in the charged amount, water was added for phase inversion emulsification, MEK was removed by desolvation under reduced pressure, water was added, and mass conversion solid content A 20% aqueous solution was obtained.
- the aqueous solution was colorless and transparent, and the particle size was less than 50 nm.
- Containing polyurethane D was obtained.
- the obtained resin solution was neutralized with the same amount of sodium hydroxide as DMPA in the charged amount, water was added for phase inversion emulsification, MEK was removed by desolvation under reduced pressure, water was added, and mass conversion solid content A 20% aqueous solution was obtained.
- the aqueous solution was colorless and transparent, and the particle size was less than 50 nm.
- the obtained resin solution was neutralized with the same amount of sodium hydroxide as DMPA in the charged amount, water was added for phase inversion emulsification, MEK was removed by desolvation under reduced pressure, water was added, and mass conversion solid content A 20% aqueous solution was obtained.
- the aqueous solution was colorless and transparent, and the particle size was less than 50 nm.
- Containing polyurethane F was obtained.
- the obtained resin solution was neutralized with the same amount of sodium hydroxide as DMPA in the charged amount, water was added for phase inversion emulsification, MEK was removed by desolvation under reduced pressure, water was added, and mass conversion solid content A 20% aqueous solution was obtained.
- the aqueous solution was colorless and transparent, and the particle size was less than 50 nm.
- the obtained resin solution was neutralized with the same amount of sodium hydroxide as DMPA in the charged amount, water was added for phase inversion emulsification, MEK was removed by desolvation under reduced pressure, water was added, and mass conversion solid content A 20% aqueous solution was obtained.
- the aqueous solution was a fluorescent transparent solution, and the particle size was 80 nm.
- Carboxy group-containing polyurethane H was obtained.
- the obtained resin solution was neutralized with the same amount of sodium hydroxide as DMPA in the charged amount, water was added for phase inversion emulsification, MEK was removed by desolvation under reduced pressure, water was added, and mass conversion solid content A 20% aqueous solution was obtained.
- the aqueous solution was colorless and transparent, and the particle size was less than 50 nm.
- the obtained resin solution was neutralized with the same amount of sodium hydroxide as DMPA in the charged amount, water was added for phase inversion emulsification, MEK was removed by desolvation under reduced pressure, water was added, and mass conversion solid content A 20% aqueous solution was obtained.
- the aqueous solution was colorless and transparent, and the particle size was less than 50 nm.
- the obtained resin solution was neutralized with the same amount of sodium hydroxide as DMPA in the charged amount, water was added for phase inversion emulsification, MEK was removed by desolvation under reduced pressure, water was added, and mass conversion solid content A 20% aqueous solution was obtained.
- the aqueous solution was milky white and the particle size was 200 nm.
- a 4-necked flask was charged with 117 g of IPDI, 357 g of poly (oxytetramethylene) glycol (OH group equivalent 173) of Mn650, 0.001 g of DBTDL, and 474 g of MEK, and reacted at 80 ° C. for 6 hours in a nitrogen gas atmosphere.
- Oligomer I2 was obtained.
- 948 g of the urethane oligomer I2 solution was charged with 344 g of urethane oligomer I1 and reacted at 80 ° C. for 10 hours under a nitrogen gas atmosphere.
- 5 g of methanol was added to stop the reaction, and the carboxy group containing an acid value of 45 and Mw 12,000 was contained.
- Polyurethane HK was obtained.
- the obtained resin solution was neutralized with the same amount of sodium hydroxide as DMPA in the charged amount, water was added for phase inversion emulsification, MEK was removed by desolvation under reduced pressure, water was added, and mass conversion solid content A 20% aqueous solution was obtained.
- the aqueous solution was milky white and the particle size was 100 nm.
- the obtained resin solution was neutralized with the same amount of sodium hydroxide as DMPA in the charged amount, water was added for phase inversion emulsification, MEK was removed by desolvation under reduced pressure, water was added, and mass conversion solid content A 20% aqueous solution was obtained.
- the aqueous solution was milky white and the particle size was 150 nm.
- the obtained resin solution was neutralized with the same amount of sodium hydroxide as DMPA in the charged amount, water was added for phase inversion emulsification, MEK was removed by desolvation under reduced pressure, water was added, and mass conversion solid content A 20% aqueous solution was obtained.
- the aqueous solution was milky white and the particle size was 150 nm.
- the obtained resin solution was neutralized with the same amount of sodium hydroxide as DMPA in the charged amount, water was added for phase inversion emulsification, MEK was removed by desolvation under reduced pressure, water was added, and mass conversion solid content A 20% aqueous solution was obtained.
- the aqueous solution was milky white and the particle size was 200 nm.
- aqueous pigment dispersion (a) 6 parts of methyl ethyl ketone solution (acid value 100, mass average molecular weight 20,000) of 50% solid content of benzyl methacrylate-methacrylic acid copolymer, 6.0 parts of 5% potassium hydroxide aqueous solution, phthalocyanine pigment “Fastogen” (Registered trademark) Blue TGR "(manufactured by DIC Corporation) (10 parts) and water (23.8 parts) were charged into a 250 mL plastic bottle and mixed.
- aqueous pigment dispersion (a) 6 parts of methyl ethyl ketone solution (acid value 100, mass average molecular weight 20,000) of 50% solid content of benzyl methacrylate-methacrylic acid copolymer, 6.0 parts of 5% potassium hydroxide aqueous solution, phthalocyanine pigment “Fastogen” (Registered trademark) Blue TGR "(manufactured by DIC Corporation) (10
- the amount of the resin is 30% by mass in terms of non-volatile content with respect to the pigment, and the 5% aqueous potassium hydroxide solution has a resin acid value of 100%.
- the amount to be added, water is the amount necessary to make the non-volatile content of the mixed solution 30%.
- the mixture was dispersed with a paint conditioner (using zirconia beads having a diameter of 0.5 mm) for 2 hours.
- the liquid obtained by removing the zirconia beads was distilled off the methyl ethyl ketone with an evaporator, centrifuged (8200 G, 30 minutes) to remove coarse particles, and then pure water was added to remove the non-volatile content.
- an aqueous pigment dispersion (a) having a nonvolatile content of 20% was obtained.
- the particle diameter of the obtained pigment dispersion was 110 nm.
- aqueous pigment dispersion (a) and the aqueous solution of the carboxy group-containing polyurethane A obtained in Synthesis Example 6 prepared according to the following composition, filtered through a filter having a pore size of 6 ⁇ m, and a thermal method with a pigment concentration of 4% An aqueous inkjet recording ink (aA) was prepared.
- Aqueous pigment dispersion (a) 13.0 parts Carboxy group-containing polyurethane aqueous solution A 3.8 parts Triethylene glycol monobutyl ether 4.0 parts 2-pyrrolidinone 4.0 parts Glycerin 1.5 parts Surfynol 440 (produced by Air Products) ) 0.3 part water 23.4 parts
- Examples 2 to 9 The same operation as in Example 1 was carried out except that the same amount of the carboxy group-containing polyurethane aqueous solutions B to I obtained in Synthesis Examples 7 to 14 was used in place of the carboxy group containing polyurethane aqueous solution A blended in Example 1.
- Aqueous recording inks (aB) to (aI) were prepared.
- Example 10> Preparation of aqueous pigment dispersion (b) 10 parts of methyl ethyl ketone solution (acid value 100, mass average molecular weight 20,000) of 50% solid content of benzyl methacrylate-methacrylic acid copolymer, 10.0 parts of 5% aqueous potassium hydroxide solution, quinacridone pigment “Fastogen” 10 parts of (Registered Trademark) Super Magenta RG (manufactured by DIC Corporation) and 20.0 parts of water were charged into a 250 mL polybin and mixed.
- methyl ethyl ketone solution acid value 100, mass average molecular weight 20,000
- quinacridone pigment “Fastogen” 10 parts of (Registered Trademark) Super Magenta RG manufactured by DIC Corporation
- the amount of the resin is 50% by mass in terms of non-volatile content with respect to the pigment, and the 5% potassium hydroxide aqueous solution has a resin acid value of 100%.
- the amount to be added, water is the amount necessary to make the non-volatile content of the mixed solution 30%.
- the mixture was dispersed with a paint conditioner (using zirconia beads having a diameter of 0.5 mm) for 2 hours.
- the liquid obtained by removing the zirconia beads was distilled off the methyl ethyl ketone with an evaporator, centrifuged (8200 G, 30 minutes) to remove coarse particles, and then pure water was added to remove the non-volatile content. And an aqueous pigment dispersion (b) having a nonvolatile content of 20% was obtained.
- the particle diameter of the obtained pigment dispersion was 120 nm.
- aqueous pigment dispersion (b) and the aqueous solution of the carboxy group-containing polyurethane A obtained in Synthesis Example 6 prepared according to the following composition, filtered through a filter having a pore size of 6 ⁇ m, and a thermal method with a pigment concentration of 6% A water-based ink (bA) for inkjet recording was prepared.
- Aqueous pigment dispersion (b) 22.5 parts Carboxy group-containing polyurethane aqueous solution A 3.8 parts Triethylene glycol monobutyl ether 4.0 parts 2-pyrrolidinone 4.0 parts Glycerin 1.5 parts Surfynol 440 (manufactured by Air Products) ) 0.3 part water 13.9 parts
- Examples 11 to 12 The same operation as in Example 1 was carried out except that the same amount of the carboxy group-containing polyurethane aqueous solutions B to C obtained in Synthesis Examples 7 to 8 was used in place of the carboxy group containing polyurethane aqueous solution A blended in Example 10, and inkjet printing was performed. Water-based inks for recording (bB) to (bC) were prepared.
- Example 13> (Preparation of aqueous pigment dispersion (c)) 10 parts of MEK solution of carboxy group-containing polyurethane A, 4.0 parts of 5% aqueous potassium hydroxide, 10 parts of phthalocyanine pigment “Fastogen (registered trademark) Blue TGR” (manufactured by DIC Corporation), 26 parts of water Charged to 8 parts, 250 mL polybin and mixed.
- 10 parts of the copper phthalocyanine pigment the amount of the resin is 50% by mass in terms of non-volatile content with respect to the pigment, and the 5% potassium hydroxide aqueous solution has a resin acid value of 100%.
- the amount to be added, water is the amount necessary to make the non-volatile content of the mixed solution 30%.
- the mixed solution was dispersed for 2 hours with a paint conditioner (using zirconia beads having a diameter of 0.5 mm). After completion of the dispersion, the liquid obtained by removing the zirconia beads was distilled off the methyl ethyl ketone with an evaporator, centrifuged (8200 G, 30 minutes) to remove coarse particles, and then purified water was added to remove the non-volatile content. And an aqueous pigment dispersion (c) having a nonvolatile content of 20% was obtained. The particle diameter of the obtained pigment dispersion was 110 nm. The aqueous pigment dispersion (c) was used, adjusted according to the following composition, and filtered through a filter having a pore diameter of 6 ⁇ m to prepare a thermal ink jet recording aqueous ink (c).
- Aqueous pigment dispersion (c) 13.0 parts Triethylene glycol monobutyl ether 4.0 parts 2-pyrrolidinone 4.0 parts Glycerin 1.5 parts Surfynol 440 (Air Products) 0.3 parts Water 27.2 parts
- Example 14 The same operation as in Example 13 was carried out except that the same amount of the MEK solution of carboxy group-containing polyurethane C obtained in Synthesis Example 8 was used instead of the MEK solution of carboxy group-containing polyurethane A obtained in Synthesis Example 6, and an aqueous pigment Dispersion d was obtained. The particle diameter of the obtained pigment dispersion was 120 nm. Using this aqueous pigment dispersion d, the same composition as in Example 13 was carried out to prepare an aqueous inkjet recording ink (d).
- Thermal inkjet printer BJ F300 type (Evaluation machine A manufactured by Canon Inc.) equipped with a bubble jet (registered trademark) recording head (BC-30E, manufactured by Canon Inc.) or thermal inkjet printer DJ 970CXi type ( Using an evaluation machine B) manufactured by Nippon Hured Packard Co., Ltd., the sample ink was drawn on a recording medium, and an ejection stability test, a print density test, a gloss value test, and a rub resistance test were performed.
- the recording medium “Canon PB paper” manufactured by Canon Co., Ltd. or “Xerox 4024” manufactured by Xerox Co., Ltd. was used as plain paper, and “photographic paper gloss” manufactured by Seiko Epson Co., Ltd. was used as a dedicated paper for inkjet.
- Print density Print a solid image on inkjet paper, use a print density measuring machine “GRETAG (registered trademark) D196 Gretag Macbeth Co., Ltd.”, measure the color image density for 5 points of a single sample, and average the values. The printing density was used. The larger the numerical value, the better the print density, and the determination was made based on the following three levels.
- ⁇ Printing density is 2.5 or more.
- a solid image was printed on ink jet dedicated paper, and rubbed 5 times with a load of 200 g using plain paper as a contact paper, using a Gakushin type anti-friction tester.
- the gloss value of the printed matter before and after the test was measured, and the smaller the change rate of the gloss value, the better the rub resistance, and the determination was made according to the following four criteria.
- ⁇ Gloss change rate is less than 5%.
- ⁇ Gloss change rate is 5% or more and less than 10%.
- ⁇ Gloss change rate is 10% or more and less than 15%.
- X Gloss change rate of 15% or more.
- the water-based ink for ink-jet recording using the carboxy group-containing polyurethane of the present invention is excellent in storage stability and ejection stability, and the obtained ink-jet print is excellent in gloss and has a high color image density. It can be seen that it has a high printing durability.
- Examples 1 to 4 and 9 to 12 in which the molecular weight of the carboxy group-containing polyurethane is in the range of 10,000 to 50,000 and the acid value is in the range of 20 to 70 have ejection stability of 300 sheets or more, and gloss The value was 40 or more, indicating a very excellent value.
- Example 5 since the molecular weight was as high as 60000, the rub resistance was excellent, but the dischargeability was slightly lowered.
- Example 6 since the molecular weight was as low as 8000, the dischargeability was good, but the abrasion resistance was slightly inferior. In Example 7, since the acid value was low, the particle size was slightly increased to 80 nm, and the dischargeability was slightly decreased. Moreover, since Example 8 had a high acid value, it was a little inferior to abrasion resistance.
- Comparative Example 1, Comparative Example 2, and Comparative Example 3 are all examples of a carboxy group-containing polyurethane that does not contain the reaction product (1), but this is low in both ejection stability and abrasion resistance. . Comparative Example 4 is an example with a low reaction index, and Comparative Example 5 is an example with a high reaction index, but this was very poor in ejection stability.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Dispersion Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Ink Jet (AREA)
- Ink Jet Recording Methods And Recording Media Thereof (AREA)
Abstract
Description
また、インクジェット印刷は、通常の印刷と異なり、プリンターヘッドからインク滴を吐出させて印字する。この吐出方式にはピエゾ方式とサーマル方式とがあるが、特にサーマル方式は、プリンターヘッドに配設された発熱抵抗素子のヒーターでノズル内のインクを沸騰させてインク滴を飛ばすため、ノズル内部の急激な温度変化により、ヒーター部分でコゲーションという現象が起こり、長時間の印字において液が吐出しなくなる(不吐出)という問題が生じる。従って、使用するインクには吐出安定性も要求される。
しかし、特許文献1に記載のインクジェット用記録液は、特に記録媒体として光沢紙を使用した時の、印字物の光沢性や耐刷性等が劣るという問題があった。また、特許文献2に記載のインクジェット記録用インク組成物は、吐出安定性がおとり、得られる印字物の擦過性が悪く、特許文献3に記載のインクジェット記録用インク組成物には、吐出安定性が劣るという問題があった。
従来のカルボキシ基含有ポリウレタンは、カルボキシ基の導入については何ら制御されておらず、カルボキシ基はポリウレタン鎖中にランダムに導入されているものがほとんどである。
特許文献1にはブロック型ウレタンオリゴマーが記載されているが、オリゴマーセグメントの制御を目的としておりカルボキシ基の位置は特定されていない。また、特許文献3にはカルボキシ基含有ジオールを含む酸基含有ジオールとジイソシアネート化合物のアダクト体を経て合成した水性ポリウレタン分散体が記載されているが、アダクト体の合成方法についてなんら記載がない。
ランダム重合の場合、重合時に複数生じる分子鎖中のカルボキシ基導入量は不均一となる。特に、得られるポリウレタンの分子量を低く制御すべく重合設計を行うと、理論的に一分子鎖あたりのカルボキシ基導入量自体が減るために、カルボキシ基が導入されない分子鎖が生じる場合がある。すなわち水性の度合いを予め予測し原料モノマーの仕込量を決定しても、得られるポリウレタンの一部の分子鎖が非水溶性となるために、部分的に溶解性が低下する。また、重合時にイソシアネート基とカルボキシ基の一部が架橋反応し水に不要なゲル成分が生成され、予想以上に分子量が大きくなったり、架橋したカルボキシ基が水分散安定基として機能しないために、仕込量に対する水溶性が低下する。本発明者らはこれらの現象、及び、これらによりインク吐出安定性や印刷適性が大きく低下することも見いだした。
特に、前記カルボキシ基含有ポリウレタンの質量平均分子量が10,000~50,000の範囲であると、サーマル方式の吐出性に特に優れる。
さらに、前記カルボキシ基含有ポリウレタンの酸価が20~70mgKOH/gであると、吐出安定性に優れる。
使用する前記ジオール化合物(A)は、ジメチロールプロピオン酸、又はジメチロールブタン酸であると、カルボキシ基をほぼ仕込み量通りに導入することができ好ましい。
本発明で使用する水性ポリマーは、1分子中に1又は2個のカルボキシ基を有するジオール化合物(A)とジイソシアネート化合物(B)とを反応させた、一般式(1)で表される化合物を主成分とし且つ(式1)で算出される反応指数が0.95~1.10の範囲内である反応生成物と、ジオール化合物(C)とを、あるいは前記反応生成物とジオール化合物(C)とジイソシアネート化合物(D)とを反応させてなるカルボキシ基含有ポリウレタンである。
中でも、印字画像の耐光変色が起こり難い点では、脂肪族ジイソシアネート化合物または脂環族ジイソシアネート化合物が好ましい。
反応中、反応溶液の水酸基価またはイソシアナト基の定量値をモニターし、一定の反応率に達した時点、すなわち(式1)で表される反応指数が0.95~1.10の範囲内となった時点で反応を止めることで、反応生成物(1)が得られる。反応を止める方法としては、後にさらにイソシアナト基とジオール化合物とを反応させる必要があることから、イソシアネートが実質上ほとんど反応しない温度、たとえば30℃以下、まで反応温度を低下させる方法が好ましい。
ここでイソシアナト基の定量値はISO14896(イソシアネート基含有率の試験方法)に記載された方法により求めることが出来、イソシアナト基の反応率は反応生成物のイソシアナト基の定量値を反応前のイソシアナト基の定量値で除した値から算出することが出来る。具体的には、下記式で求められる。
これらのジオール化合物(C)の例としては、ポリエステルポリオール、ポリエーテルポリオール、ポリヒドロキシポリカーボネート、ポリヒドロキシポリアセタール、ポリヒドロキシポリアクリレート、ポリヒドロキシポリエステルアミドおよびポリヒドロキシポリチオエーテルが挙げられる。中でも、ポリエステルポリオール、ポリエーテルポリオールおよびポリヒドロキシポリカーボネートが好ましい。これらのジオール化合物は、1種のみを反応させてもよく、数種を混合して反応させてもよい。
また前記高分子のジオール化合物のほか、印字物における皮膜硬度の調整等を目的として、低分子量のジオール化合物を適宜併用しても良い。例としては、エチレングリコール、ジエチレングリコール、プロピレングリコール、ジプロピレングリコール、1,2-プロパンジオール、1,3-プロパンジオール、1,4-ブタンジオール等が挙げられる。
前記反応生成物(1)とジオール化合物(C)を反応させる場合には、前記反応生成物(1)とジオール化合物(C)とを溶媒中混合攪拌することで反応させることができる。
また、前記反応生成物(1)とジオール化合物(C)とジイソシアネート化合物(D)とを反応させる場合には、前記反応生成物(1)とジオール化合物(C)とを溶媒中混合攪拌しながら反応させた後ジイソシアネート化合物(D)を添加しても良いし、ジオール化合物(C)とジイソシアネート化合物(D)との混合物と前記反応生成物(1)とを溶媒中混合攪拌して反応させてもよい。また分子量を上げる等の目的により更にジオール化合物(C)を再度添加することも出来る。
具体的な反応は、たとえば前記活性水素を持たない溶剤中、60~110℃の条件下で10~20時間反応させる。その際、ジブチル錫ジラウレート等の公知のウレタン化触媒を使用しても良い。その後得られたカルボキシ基含有ポリウレタンと有機溶剤の混合物を、水と塩基性物質を用いて徐徐に油相から水相に転相させてから脱溶剤することにより、カルボキシ基含有ポリウレタンの水性ポリマーとすることが出来る。
転相の際に使用する塩基性物質としては、例えば、アンモニア、エチルアミン、トリメチルアミン、トリエチルアミン、トリイソプロピルアミン、トリブチルアミン、トリエタノールアミン、N-メチルジエタノールアミン、N-フェニルジエタノールアミン、モノエタノールアミン、ジメチルエタノールアミン、ジエチルエタノールアミン、モルホリン、N-メチルモルホリン、2-アミノ-2-エチル-1-プロパノール等の有機アミン類、リチウム、カリウム、ナトリウム等のアルカリ金属、水酸化ナトリウム、水酸化カリウムの無機アルカリ類等が挙げられる。塩基性物質の使用量は、カルボキシ基含有ポリウレタンの物性に応じて適宜設定されるが、塩基性物質の使用量は特に制限されるものではないが、通常、ポリウレタンの酸価の70~130%を中和するのに必要な量の塩基性物質が用いられる。
また、前記カルボキシ基含有ポリウレタンの質量平均分子量は10,000~50,000が好ましく、より好ましくは20,000~50,000である。(なお、本発明における質量平均分子量は、ゲルパーミエーションクロマトグラフィーにより測定され、ポリスチレン換算の値として表される。以下、特に断りのない限りMwと略す)Mwが10,000未満であると、被記録媒体への顔料の定着性が乏しくなるとともに印字画像の耐擦性が低下するおそれがある。一方Mwが50,000を超えると、調製されるインクジェット記録用水性インクの粘度が高くなり、吐出安定性が低下するおそれがある。
ここで粒子径の測定は、公知慣用の遠心沈降方式、レーザー回折方式(光散乱方式)、ESA方式、キャピラリー方式、電子顕微鏡方式などで行うことができる。好ましいのは、動的光散乱法を利用したマイクロトラックUPAによる測定である。
前記水性ポリマーは、顔料の種類に影響されず良好な顔料分散性、吐出安定性を示すことも特徴である。顔料分散液の調製に用いる顔料としては、硫酸バリウム、硫酸鉛、酸化チタン、黄色鉛、ベンガラ、酸化クロム、カーボンブラック等の無機顔料、アントラキノン系顔料、ペリレン系顔料、ジスアゾ系顔料、フタロシアニン系顔料、イソインドリン系顔料、ジオキサジン系顔料、キナクリドン系顔料、ペリノン系顔料、ベンズイミダゾロン系顔料等が挙げられる。これらを単独または混合して用いることができる。
シアンの顔料としては、たとえば、C.I.ピグメント ブルー 1、C.I.ピグメント ブルー 2、C.I.ピグメント ブルー 3、C.I.ピグメント ブルー 15、C.I.ピグメント ブルー 15:1、C.I.ピグメント ブルー 15:3、C.I.ピグメント ブルー 15:4、C.I.ピグメント ブルー 16、C.I.ピグメント ブルー 22、C.I.ピグメント ブルー 60、などが挙げられる。
本発明で使用する水は、水単独で使用するほか、水と水との相溶性を有する水溶性有機溶剤からなる混合溶媒でもよい。水溶性有機溶剤としては、例えば、アセトン、メチルエチルケトン、メチルブチルケトン、メチルイソブチルケトン、等のケトン類;メタノール、エタノール、2-プロパノール、2-メチル-1-プロパノール、1-ブタノール、2-メトキシエタノール、等のアルコール類;テトラヒドロフラン、1,4-ジオキサン、1,2-ジメトキシエタン、等のエーテル類;ジメチルホルムアミド、N-メチルピロリドン、等のアミド類が挙げられ、とりわけ炭素数が3~6のケトン及び炭素数が1~5のアルコールからなる群から選ばれる化合物を用いるのが好ましい。
本発明で使用するカルボキシ基含有ポリウレタンは、顔料を分散する性能を有するため、単独で顔料分散性樹脂として使用してもよいし、汎用の顔料分散剤として使用されている樹脂(以下顔料分散用樹脂と略す)、を併用することもできる。あるいは、ビヒクル目的として使用することも可能である。併用する場合は、使用するカルボキシ基含有ポリウレタンと顔料分散用樹脂の添加順序に特に限定はなく、目的に応じて適宜変更することが可能である。たとえば、カルボキシ基含有ポリウレタンで顔料を分散させた本発明の顔料分散液をそのまま溶剤で希釈してインクとして使用することもできるし、汎用の顔料分散用樹脂で分散された顔料分散体に、本発明で使用するカルボキシ基含有ポリウレタンを後から添加して、本発明の顔料分散液としてもよい。
前記共重合体の塩を形成するための化合物としては、水酸化ナトリウム、水酸化カリウム、水酸化リチウムなどの水酸化アルカリ金属類、およびジエチルアミン、アンモニア、エチルアミン、トリエチルアミン、プロピルアミン、イソプロピルアミン、ジプロピルアミン、ブチルアミン、イソブチルアミン、トリエタノールアミン、ジエタノールアミン、アミノメチルプロパノール、モルホリンなどが挙げられる。これらの塩を形成するための化合物の使用量は、前記共重合体の中和当量以上であることが好ましい。
これらの水性樹脂は、使用に際して単独か又は二種以上を混合して用いることができる。なおここで使用する水性樹脂は、ランダム共重合体、ブロック共重合体など、その形態に特に制限はない。
本発明のインクジェット記録用水性インクは、本発明の顔料分散液を前記水または水を含む水性溶媒で希釈し、これに必要に応じて乾燥抑止剤、浸透剤、あるいはその他の添加剤を添加して調製する。
乾燥抑止剤として使用できる水溶性有機溶剤としては、エチレングリコール、ジエチレングリコール、ポリエチレングリコール、グリセリン等の多価アルコール類、N-メチル-2-ピロリドン、2-ピロリドン等のピロリドン類、アミド類、ジメチルスルホキシド、イミダゾリジノン等を挙げることができる。乾燥抑止剤の使用量は、溶媒が水の場合、水100部に対して1~150部の範囲で使用するのが好ましい。
本発明に使用される浸透剤としては、エチレングリコール、1,2,6-ヘキサントリオール、チオジグリコール、ヘキシレングリコール、ジエチレングリコールなどの多価アルコール類、ペンタンジオール、ヘキサンジオールなどのジオール類、ラウリン酸プロピレングリコールなどのグリコールエーテル類、ジエチレングリコールエチルエーテル、トリエチレングリコールモノエチルエーテル、などの多価アルコールの低級アルキルエーテル類エタノール、イソプロピルアルコール等の低級アルコール、ジエチレングリコール-N-ブチルエーテル等のグリコールエーテル、プロピレングリコール誘導体等の水溶性有機溶媒、などがあげられる。これらは単独または2種以上混合して使用することができる。2種以上を混合して使用することによって、より好ましい浸透性を得ることができる場合がある。
その他の添加剤としては、たとえば、防腐剤、防黴剤、あるいはノズル目詰まり防止用のキレート化剤などが挙げられる。
また、合成例、実施例及び比較例において、「部」及び「%」は、いずれも質量換算である。
試料液の0.1gを、0.01規定ジ-n-ブチルアミンのジメチルホルムアミド溶液40ml中に加えて溶解した後、0.01規定塩酸のメタノール溶液でブロムフェノールブルーを指示薬として用いて中和滴定を行って定量した。
試料液の1.0gを、メチルエチルケトン10gで希釈し、トルエンとメタノールの混合溶媒(トルエン:メタノール=7:3)溶液40ml中に加えて溶解した後、0.1規定水酸化カリウムのメタノール溶液でフェノールフタレインを指示薬として用いて中和滴定を行って定量した。
試料インクに水を加えて1000倍に希釈した後、粒度分析計(リーズ・アンド・ノースラップ社製「マイクロトラックUPA150」)を使用して、試料インク中に分散している顔料の粒子径を測定した。
温度計、攪拌機、窒素導入管、冷却管を備えた4つ口フラスコに、メチルエチルケトン(以下MEKと略す)を482g、ジメチロールプロピオン酸(以下DMPAと略す)を134g、トルイレンジイソシアネー卜を348g仕込み、窒素ガス雰囲気下70℃で1.5時間反応させ、反応生成物(1-1)を得た。反応生成物(1-1)のイソシアナト基定量値は8.73であり、反応指数は0.998であった。
温度計、攪拌機、窒素導入管、冷却管を備えた4つ口フラスコに、MEKを660g、DMPAを134g、4,4-シクロヘキシルメタンジイソシアネート(以下H2MDIと略す)を524g仕込み、窒素ガス雰囲気下70℃で1.5時間反応させ、反応生成物(1-2)を得た。反応生成物(1-2)の反応生成物(1-3)のイソシアナト基定量値は6.53であり、反応指数は0.980であった。
温度計、攪拌機、窒素導入管、冷却管を備えた4つ口フラスコに、MEKを592g、DMPAを147g、IPDIを444g仕込み、窒素ガス雰囲気下70℃で2時間反応させ、反応生成物(1-3)を得た。反応生成物(1-3)のイソシアナト基定量値は6.53であり、反応指数は0.977であった。
温度計、攪拌機、窒素導入管、冷却管を備えた4つ口フラスコに、MEKを592g、DMPAを147g、IPDIを444g仕込み、窒素ガス雰囲気下70℃で2.5時間反応させ、反応生成物(1-4)を得た。反応生成物(1-4)のイソシアナト基定量値は5.82であり、反応指数は1.068であった。
温度計、攪拌機、窒素導入管、冷却管を備えた4つ口フラスコに、MEKを622g、DMPAを134g、IPDIを488g仕込み、窒素ガス雰囲気下70℃で2時間反応させ、反応生成物(1-5)を得た。反応生成物(1-5)のイソシアナト基定量値は8.17であり、反応指数は0.990であった。
温度計、攪拌機、窒素導入管、冷却管を備えた4つ口フラスコに、MEKを290g、DMPAを67g、IPDIを222g仕込み、窒素ガス雰囲気下70℃で1時間反応させ、反応生成物(比1-1)を得た。反応生成物(比1-1)のイソシアナト基定量値は4.49であり、反応指数は0.760であった。
温度計、攪拌機、窒素導入管、冷却管を備えた4つ口フラスコに、MEKを290g、DMPAを67g、IPDIを222g仕込み、窒素ガス雰囲気下70℃で6時間反応させ、反応生成物(比1-2)を得た。反応生成物(比1-2)のイソシアナト基定量値は3.11であり、反応指数は1.140であった。
温度計、攪拌機、窒素導入管、冷却管を備えた4つ口フラスコに、合成例1で得られた反応生成物(1-1)を243gとMn650のポリ(オキシテトラメチレン)グリコール(OH基当量173)を243g、ジブチル錫ジラウレート(以下DBTDLと略す)を0.001g、MEK 243g仕込み、窒素ガス雰囲気下80℃で16時間反応させた後、メタノール5gを加えて反応を停止し、酸価38、ポリスチレン換算で質量平均分子量12,000のカルボキシ基含有ポリウレタンAのMEK溶液を得た。得られた溶液は、仕込量のDMPAと同モル量の水酸化ナトリウムで中和し、水を加え転相乳化し、MEKを減圧脱溶剤により除去した後、水を加えて質量換算固形分20%の水溶液とした。水溶液は無色透明であり、粒径は50nm未満であった。
温度計、攪拌機、窒素導入管、冷却管を備えた4つ口フラスコに、合成例2で得られた反応生成物(1-2)を330gとMn1000のポリ(オキシテトラメチレン)グリコール(OH基当量112)を260g、DBTDLを0.001g、MEK 260g仕込み、窒素ガス雰囲気下80℃で16時間反応させた後、メタノール5gを加えて反応を停止し、酸価33、Mw50,000のカルボキシ基含有ポリウレタンBを得た。得られた樹脂溶液は、仕込量のDMPAと同モル量の水酸化ナトリウムで中和し、水を加え転相乳化し、MEKを減圧脱溶剤により除去した後、水を加えて質量換算固形分20%の水溶液とした。水溶液は無色透明であり、粒径は50nm未満であった。
温度計、攪拌機、窒素導入管、冷却管を備えた4つ口フラスコに、合成例3で得られた反応生成物(1-3)を296gとMn1000のポリ(オキシテトラメチレン)グリコール(OH基当量112)を225g、DBTDLを0.001g、MEK 230g仕込み、窒素ガス雰囲気下80℃で16時間反応させた後、メタノール5gを加えて反応を停止し、酸価41、Mw30,000のカルボキシ基含有ポリウレタンCを得た。得られた樹脂溶液は、仕込量のDMPAと同モル量の水酸化ナトリウムで中和し、水を加え転相乳化し、MEKを減圧脱溶剤により除去した後、水を加えて質量換算固形分20%の水溶液とした。水溶液は無色透明であり、粒径は50nm未満であった。
温度計、攪拌機、窒素導入管、冷却管を備えた4つ口フラスコに、合成例4で得られた反応生成物(1-4)を296gとMn1000のポリ(オキシテトラメチレン)グリコール(OH基当量112)を225g、DBTDLを0.001g、MEK 230g仕込み、窒素ガス雰囲気下80℃で16時間反応させた後、メタノール5gを加えて反応を停止し、酸価41、Mw30,000のカルボキシ基含有ポリウレタンDを得た。得られた樹脂溶液は、仕込量のDMPAと同モル量の水酸化ナトリウムで中和し、水を加え転相乳化し、MEKを減圧脱溶剤により除去した後、水を加えて質量換算固形分20%の水溶液とした。水溶液は無色透明であり、粒径は50nm未満であった。
温度計、攪拌機、窒素導入管、冷却管を備えた4つ口フラスコに、合成例2で得られた反応生成物(1-2)を330gとMn650のポリエステルポリオール(OH基当量173)を169g、DBTDLを0.001g、MEK 170g仕込み、窒素ガス雰囲気下80℃で20時間反応させた後、メタノール5gを加えて反応を停止し、酸価42、Mw60,000のカルボキシ基含有ポリウレタンEを得た。得られた樹脂溶液は、仕込量のDMPAと同モル量の水酸化ナトリウムで中和し、水を加え転相乳化し、MEKを減圧脱溶剤により除去した後、水を加えて質量換算固形分20%の水溶液とした。水溶液は無色透明であり、粒径は50nm未満であった。
温度計、攪拌機、窒素導入管、冷却管を備えた4つ口フラスコに、合成例1で得られた反応生成物(1-1)を243gとMn650のポリ(オキシテトラメチレン)グリコール(OH基当量173)を270g、DBTDLを0.001g、MEK 270g仕込み、窒素ガス雰囲気下80℃で10時間反応させた後、メタノール5gを加えて反応を停止し、酸価36、Mw9,000のカルボキシ基含有ポリウレタンFを得た。得られた樹脂溶液は、仕込量のDMPAと同モル量の水酸化ナトリウムで中和し、水を加え転相乳化し、MEKを減圧脱溶剤により除去した後、水を加えて質量換算固形分20%の水溶液とした。水溶液は無色透明であり、粒径は50nm未満であった。
温度計、攪拌機、窒素導入管、冷却管を備えた4つ口フラスコに、合成例1で得られた反応生成物(1-1)を243gとMn2000のポリ(オキシテトラメチレン)グリコール(OH基当量56)を667g、IPDIを12.3g、DBTDLを0.001g、MEK 680g仕込み、窒素ガス雰囲気下80℃で16時間反応させた後、メタノール5gを加えて反応を停止し、酸価17、Mw38,000のカルボキシ基含有ポリウレタンGを得た。得られた樹脂溶液は、仕込量のDMPAと同モル量の水酸化ナトリウムで中和し、水を加え転相乳化し、MEKを減圧脱溶剤により除去した後、水を加えて質量換算固形分20%の水溶液とした。水溶液は蛍光色の透明溶液であり、粒径は80nmであった。
温度計、攪拌機、窒素導入管、冷却管を備えた4つ口フラスコに、合成例3で得られた反応生成物(1-3)を268gとMn400のポリプロピレングリコール(OH基当量281)を45g、エチレングリコールを7.2g、DBTDLを0.001g、MEK 320g仕込み、窒素ガス雰囲気下80℃で16時間反応させた後、メタノール5gを加えて反応を停止し、酸価75、Mw30,000のカルボキシ基含有ポリウレタンHを得た。得られた樹脂溶液は、仕込量のDMPAと同モル量の水酸化ナトリウムで中和し、水を加え転相乳化し、MEKを減圧脱溶剤により除去した後、水を加えて質量換算固形分20%の水溶液とした。水溶液は無色透明であり、粒径は50nm未満であった。
温度計、攪拌機、窒素導入管、冷却管を備えた4つ口フラスコに、合成例5で得られた反応生成物(1-5)を293gとMn2000のポリ(オキシテトラメチレン)グリコール(OH基当量56)を450g、DBTDLを0.001g、MEK 450g仕込み、窒素ガス雰囲気下80℃で16時間反応させた後、メタノール5gを加えて反応を停止し、酸価28、Mw40,000のカルボキシ基含有ポリウレタンIを得た。得られた樹脂溶液は、仕込量のDMPAと同モル量の水酸化ナトリウムで中和し、水を加え転相乳化し、MEKを減圧脱溶剤により除去した後、水を加えて質量換算固形分20%の水溶液とした。水溶液は無色透明であり、粒径は50nm未満であった。
温度計、攪拌機、窒素導入管、冷却管を備えた4つ口フラスコに、IPDIを266g、DMPAを67gとMn650のポリエステルポリオール(OH基当量173)を325g、DBTDLを0.001g、MEK 646g仕込み、窒素ガス雰囲気下80℃で10時間反応させた後、鎖伸長剤としてエチレンジアミン15gを加えて反応を停止し、酸価45、Mw80,000のカルボキシ基含有ポリウレタンH-Jを得た。得られた樹脂溶液は、仕込量のDMPAと同モル量の水酸化ナトリウムで中和し、水を加え転相乳化し、MEKを減圧脱溶剤により除去した後、水を加えて質量換算固形分20%の水溶液とした。水溶液は乳白色であり、粒径は200nmであった。
温度計、攪拌機、窒素導入管、冷却管を備えた4つ口フラスコに、IPDIを105g、DMPAを67gとMEK 172g仕込み、窒素ガス雰囲気下70℃で4時間反応させ、ウレタンオリゴマーI1を得た。4つ口フラスコにIPDIを117g、Mn650のポリ(オキシテトラメチレン)グリコール(OH基当量173)を357g、DBTDLを0.001g、MEK 474g仕込み、窒素ガス雰囲気下80℃で6時間反応させてウレタンオリゴマーI2を得た。前記ウレタンオリゴマーI2溶液948gに、ウレタンオリゴマーI1を344g仕込み、窒素ガス雰囲気下80℃で10時間反応させた後、メタノール5gを加えて反応を停止し、酸価45、Mw12,000のカルボキシ基含有ポリウレタンH-Kを得た。得られた樹脂溶液は、仕込量のDMPAと同モル量の水酸化ナトリウムで中和し、水を加え転相乳化し、MEKを減圧脱溶剤により除去した後、水を加えて質量換算固形分20%の水溶液とした。水溶液は乳白色であり、粒径は100nmであった。
温度計、攪拌機、窒素導入管、冷却管を備えた4つ口フラスコに、IPDIを222g、Mn650のポリ(オキシテトラメチレン)グリコール(OH基当量173)を330g、DBTDLを0.001g仕込み、窒素ガス雰囲気下100℃で2時間反応させた。続いて、DMPAを67gとMEK 620g仕込み、窒素ガス雰囲気下80℃で16時間反応させた後、メタノール5gを加えて反応を停止し、酸価45、Mw50,000のカルボキシ基含有ポリウレタンH-Lを得た。得られた樹脂溶液は、仕込量のDMPAと同モル量の水酸化ナトリウムで中和し、水を加え転相乳化し、MEKを減圧脱溶剤により除去した後、水を加えて質量換算固形分20%の水溶液とした。水溶液は乳白色であり、粒径は150nmであった。
温度計、攪拌機、窒素導入管、冷却管を備えた4つ口フラスコに、比較合成例1で得られた反応生成物(比1-1)を579gと、Mn650のポリ(オキシテトラメチレン)グリコール(OH基当量173)を357g、DBTDLを0.001g、MEK 357g仕込み、窒素ガス雰囲気下80℃で16時間反応させた後、メタノール5gを加えて反応を停止し、酸価45、Mw32,000のカルボキシ基含有ポリウレタンH-Mを得た。得られた樹脂溶液は、仕込量のDMPAと同モル量の水酸化ナトリウムで中和し、水を加え転相乳化し、MEKを減圧脱溶剤により除去した後、水を加えて質量換算固形分20%の水溶液とした。水溶液は乳白色であり、粒径は150nmであった。
温度計、攪拌機、窒素導入管、冷却管を備えた4つ口フラスコに、比較合成例2で得られた反応生成物(比1-2)を579gと、Mn650のポリ(オキシテトラメチレン)グリコール(OH基当量173)を357g、DBTDLを0.001g、MEK 357g仕込み、窒素ガス雰囲気下80℃で16時間反応させた後、メタノール5gを加えて反応を停止し、酸価41、Mw42,000のカルボキシ基含有ポリウレタンH-Nを得た。得られた樹脂溶液は、仕込量のDMPAと同モル量の水酸化ナトリウムで中和し、水を加え転相乳化し、MEKを減圧脱溶剤により除去した後、水を加えて質量換算固形分20%の水溶液とした。水溶液は乳白色であり、粒径は200nmであった。
(水性顔料分散体(a)の調整)
メタクリル酸ベンジル-メタクリル酸共重合体の固形分50%のメチルエチルケトン溶液(酸価100、質量平均分子量20、000)を6部、5%水酸化カリウム水溶液を6.0部、フタロシアニン系顔料「Fastogen(登録商標)Blue TGR」(DIC(株)社製)10部、水23.8部を250mLのポリビンに仕込み、混合した。(ここでそれぞれの仕込量は、銅フタロシアニン系顔料が10部、樹脂は顔料に対して不揮発分で30質量%の比率となる量、5%水酸化カリウム水溶液は樹脂の酸価が100%中和される量、水は混合液の不揮発分を30%とするのに必要な量である。)
該混合液をペイントコンディショナー(直径0.5mmのジルコニアビーズ使用)で2時間分散した。分散終了後、ジルコニアビーズを除いて得られた液をエバポレーターでメチルエチルケトンを留去した後、遠心分離処理(8200 G、30分間)して粗大粒子を除去したのち、純水を加えて不揮発分を調整し、不揮発分20%の水性顔料分散体(a)を得た。得られた顔料分散体の粒径は110nmであった。
カルボキシ基含有ポリウレタン水溶液A 3.8部
トリエチレングリコールモノブチルエーテル 4.0部
2-ピロリジノン 4.0部
グリセリン 1.5部
サーフィノール440(エアプロダクツ社製) 0.3部
水 23.4部
実施例1で配合したカルボキシ基含有ポリウレタン水溶液Aに代えて合成例7~14で得られたカルボキシ基含有ポリウレタン水溶液B~Iの同量を用いる以外は実施例1と同様の操作を行い、インクジェット記録用水性インク(a-B)~(a-I)を調製した。
(水性顔料分散体(b)の調整)
メタクリル酸ベンジル-メタクリル酸共重合体の固形分50%のメチルエチルケトン溶液(酸価100、質量平均分子量20、000)を10部、5%水酸化カリウム水溶液を10.0部、キナクリドン系顔料「Fastogen(登録商標)Super Magenta RG」(DIC(株)社製)10部、水20.0部を250mLのポリビンに仕込み、混合した。(ここでそれぞれの仕込量は、銅フタロシアニン系顔料が10部、樹脂は顔料に対して不揮発分で50質量%の比率となる量、5%水酸化カリウム水溶液は樹脂の酸価が100%中和される量、水は混合液の不揮発分を30%とするのに必要な量である。)
該混合液をペイントコンディショナー(直径0.5mmのジルコニアビーズ使用)で2時間分散した。分散終了後、ジルコニアビーズを除いて得られた液をエバポレーターでメチルエチルケトンを留去した後、遠心分離処理(8200 G、30分間)して粗大粒子を除去したのち、純水を加えて不揮発分を調整し、不揮発分20%の水性顔料分散体(b)を得た。得られた顔料分散体の粒径は120nmであった。
カルボキシ基含有ポリウレタン水溶液A 3.8部
トリエチレングリコールモノブチルエーテル 4.0部
2-ピロリジノン 4.0部
グリセリン 1.5部
サーフィノール440(エアプロダクツ社製) 0.3部
水 13.9部
実施例10で配合したカルボキシ基含有ポリウレタン水溶液Aに代えて合成例7~8で得られたカルボキシ基含有ポリウレタン水溶液B~Cの同量を用いる以外は実施例1と同様の操作を行い、インクジェット記録用水性インク(b-B)~(b-C)を調製した。
(水性顔料分散体(c)の調整)
カルボキシ基含有ポリウレタンAのMEK溶液を10部、5%水酸化カリウム水溶液を4.0部、フタロシアニン系顔料「Fastogen(登録商標)Blue TGR」(DIC(株)社製)10部、水を26.8部、250mLのポリビンに仕込み、混合した。(ここでそれぞれの仕込量は、銅フタロシアニン系顔料が10部、樹脂は顔料に対して不揮発分で50質量%の比率となる量、5%水酸化カリウム水溶液は樹脂の酸価が100%中和される量、水は混合液の不揮発分を30%とするのに必要な量である。)
該混合液をペイントコンディショナー(直径0.5mmのジルコニアビーズ使用)で2時間分散した。分散終了後、ジルコニアビーズを除いて得られた液をエバポレーターでメチルエチルケトンを留去した後、遠心分離処理(8200 G、30分間)して粗大粒子を除去したのち、純水を加えて不揮発分を調整し、不揮発分20%の水性顔料分散体(c)を得た。得られた顔料分散体の粒径は110nmであった。
この水性顔料分散体(c)を使用し、下記組成に従い調整し、孔径6μmのフィルターで濾過して、サーマル方式インクジェット記録用水性インク(c)を調製した。
トリエチレングリコールモノブチルエーテル 4.0部
2-ピロリジノン 4.0部
グリセリン 1.5部
サーフィノール440(エアプロダクツ社製) 0.3部
水 27.2部
合成例6で得たカルボキシ基含有ポリウレタンAのMEK溶液に代えて、合成例8で得たカルボキシ基含有ポリウレタンCのMEK溶液を同量用いる以外は実施例13と同様の操作を行い、水性顔料分散体dを得た。得られた顔料分散体の粒径は120nmであった。この水性顔料分散体dを使用し、実施例13と同様の配合を行い、インクジェット記録用水性インク(d)を調製した。
実施例1で配合したカルボキシ基含有ポリウレタン水溶液Aに代えて比較合成例3~7で得られたカルボキシ基含有ポリウレタン水溶液H-J~H-Nの同量を用いる以外は実施例1と同様の操作を行い、インクジェット記録用水性インク(a-H-J)~(a-H-N)を調製した。
バブルジェット(登録商標)記録ヘッド(BC-30E、キャノン株式会社製)を搭載したサーマル式のインクジェットプリンターBJ F300型(キャノン株式会社製 以下評価機A)、またはサーマル式のインクジェットプリンターDJ 970CXi型(日本ヒューレッド・パッカード株式会社製 以下評価機B)を使用して、記録媒体上に試料インクで描画し、吐出安定性試験、印字濃度試験、光沢値試験、及び耐擦性試験を行った。
記録媒体としては、普通紙として、Canon(株)製「Canon PBペーパー」、あるいはXerox社製「Xerox4024」を使用し、インクジェット専用紙としてセイコーエプソン(株)製「写真用紙光沢」を使用した。
普通紙にベタ画像の連続印字を行い、連続印字した印字物の印字枚数が多ければ多いほど(不吐出など画像に乱れが生じずに印字できる枚数)吐出安定性は良好であると判断し、次の3段階の基準で判定した。
○ 印字物の印字枚数300枚以上
△ 印字物の印字枚数100枚以上300枚未満
× 印字物の印字枚数100枚未満
インクジェット専用紙にベタ画像を印刷し、印字濃度測定機「GRETAG(登録商標) D196 グレタグマクベス社製」を使用し、単一サンプルの5点について着色画像濃度を測定し、それらを平均した値を印字濃度とした。数値が大きいほど印字濃度が良好であることを示しており、次の3段階の基準で判定した。
○ 印字濃度2.5以上。
△ 印字濃度2.0以上2.5未満。
× 印字濃度2.0未満。
専用紙にベタ画像を印刷し、光沢値測定機として「ヘイズグロスメーター BYK Gardner社製」を使用し、測定角度20度で着色画像の光沢を測定した。単一サンプルの3点について測定し、それらを平均した値を光沢値とした。数値が大きいほど光沢が良好であることを示しており、次の4段階の基準で判定した。
◎ 光沢値40以上
○ 光沢値30以上。
△ 光沢値20以上30未満。
× 光沢値10未満。
インクジェット専用紙にベタ画像を印刷し、学振型耐摩擦試験機を用いて、普通紙を当て紙として荷重200gで5回摩擦した。試験前後の印字物の光沢値を測定し、光沢値の変化率が少ないほど耐擦性が良好であることを示しており、次の4段階の基準で判定した。
◎ 光沢変化率5%未満。
○ 光沢変化率5%以上10%未満。
△ 光沢変化率10%以上15%未満。
× 光沢変化率15%以上。
インクジェット記録用インクを70℃で7日保存した際の粘度を測定し、初期粘度に対する変化率が5%未満のものを○、5%以上10%未満のものを△、10%以上のものを×とした。なお粘度測定はRE-550形粘度計(東機産業社製)を用いて行った。
実施例5は分子量が60000と高いため耐擦性は優れていたが吐出性がやや低下した。また実施例6は分子量が8000と低いため吐出性はよかったが耐擦性にやや劣った。実施例7は酸価が低いため粒径が80nmとやや大きくなり吐出性がやや低下した。また実施例8は酸価が高いため、耐擦性にやや劣った。
これに対し、比較例1、比較例2、比較例3はいずれも、カルボキシ基含有ポリウレタンで反応生成物(1)を含まない例であるが、これは吐出安定性と耐擦性ともに低かった。比較例4は反応指数が低い例であり、また比較例5は反応指数が高い例であるがこれは吐出安定性に非常に劣っていた。
Claims (6)
- 水、水性ポリマー、及び顔料を必須成分とする顔料分散液であって、前記水性ポリマーが、
1分子中に1又は2個のカルボキシ基を有するジオール化合物(A)とジイソシアネート化合物(B)とを反応させた一般式(1)で表される化合物を主成分とし、且つ(式1)で算出される反応指数が0.95~1.10の範囲内である反応生成物と、ジオール化合物(C)とを、あるいは前記反応生成物とジオール化合物(C)とジイソシアネート化合物(D)とを反応させてなるカルボキシ基含有ポリウレタンであることを特徴とする顔料分散液。
(一般式(1)中、R1及びR3は、ジイソシアネート化合物(B)のイソシアナト基を除く部分構造を表し、R1及びR3は同じであっても異なっていてもよく、R2は、前記1分子中に1又は2個のカルボキシ基を有するジオール化合物(A)のヒドロキシ基を除く部分構造を表す。)
- 前記カルボキシ基含有ポリウレタンの質量平均分子量が10,000~50,000の範囲である、請求項1に記載の顔料分散液。
- 前記カルボキシ基含有ポリウレタンの酸価が20~70mgKOH/gである、請求項1又は2に記載の顔料分散液。
- 前記ジオール化合物(A)が、ジメチロールプロピオン酸又はジメチロールブタン酸である請求項1~3のいずれかに記載の顔料分散液。
- 請求項1~4のいずれかに記載の顔料分散液を使用してなるインクジェット記録用水性インク。
- 水、水性ポリマー、及び顔料を必須成分とする顔料分散液に使用する水性ポリマーの製造方法であって、1分子中に1又は2個のカルボキシ基を有するジオール化合物(A)とジイソシアネート化合物(B)とを反応させ、(式1)で算出される反応指数が0.95~1.10の範囲内となった時点で反応を止めて一般式(1)で表される化合物を主成分とする反応生成物を製造し、その後、前記反応生成物とジオール化合物(C)とを、あるいは前記反応生成物とジオール化合物(C)とジイソシアネート化合物(D)とを反応させることを特徴とする水性ポリマーの製造方法。
(一般式(1)中、R1及びR3は、ジイソシアネート化合物(B)のイソシアナト基を除く部分構造を表し、R1及びR3は同じであっても異なっていてもよく、R2は、前記1分子中に1又は2個のカルボキシ基を有するジオール化合物(A)のヒドロキシ基を除く部分構造を表す。)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200980138266XA CN102165024B (zh) | 2008-09-29 | 2009-09-16 | 颜料分散液及喷墨记录用水性油墨 |
JP2010511005A JP4618521B2 (ja) | 2008-09-29 | 2009-09-16 | 顔料分散液及びインクジェット記録用水性インク |
CA 2738462 CA2738462C (en) | 2008-09-29 | 2009-09-16 | Pigment dispersion and aqueous ink for inkjet recording |
EP09816080.7A EP2341110B1 (en) | 2008-09-29 | 2009-09-16 | Pigment dispersion and aqueous ink for inkjet recording |
KR1020117003026A KR101292234B1 (ko) | 2008-09-29 | 2009-09-16 | 안료 분산액 및 잉크젯 기록용 수성 잉크 |
US13/121,547 US8198391B2 (en) | 2008-09-29 | 2009-09-16 | Pigment dispersion and aqueous ink for inkjet recording |
HK11111679A HK1157373A1 (en) | 2008-09-29 | 2011-10-28 | Pigment dispersion and aqueous ink for inkjet recording |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008-250206 | 2008-09-29 | ||
JP2008250206 | 2008-09-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010035665A1 true WO2010035665A1 (ja) | 2010-04-01 |
Family
ID=42059666
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2009/066121 WO2010035665A1 (ja) | 2008-09-29 | 2009-09-16 | 顔料分散液及びインクジェット記録用水性インク |
Country Status (9)
Country | Link |
---|---|
US (1) | US8198391B2 (ja) |
EP (1) | EP2341110B1 (ja) |
JP (1) | JP4618521B2 (ja) |
KR (1) | KR101292234B1 (ja) |
CN (1) | CN102165024B (ja) |
CA (1) | CA2738462C (ja) |
HK (1) | HK1157373A1 (ja) |
TW (1) | TWI445780B (ja) |
WO (1) | WO2010035665A1 (ja) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012072361A (ja) * | 2010-08-31 | 2012-04-12 | Canon Inc | インク、インクカートリッジ、及びインクジェット記録方法 |
JP2012072360A (ja) * | 2010-08-31 | 2012-04-12 | Canon Inc | インク、インクカートリッジ、及びインクジェット記録方法 |
CN102746714A (zh) * | 2012-05-02 | 2012-10-24 | 中国皮革和制鞋工业研究院 | 一种耐迁移皮革染料的制备方法 |
JP2015120818A (ja) * | 2013-12-24 | 2015-07-02 | Dic株式会社 | 水性顔料分散体、及びインクジェット記録用水性インク |
JP2016130278A (ja) * | 2015-01-13 | 2016-07-21 | Dic株式会社 | 水性顔料分散体、及びインクジェット記録用水性インク |
JP2019023266A (ja) * | 2017-07-25 | 2019-02-14 | 三洋化成工業株式会社 | 複合粒子水性分散体 |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8563634B2 (en) | 2009-02-03 | 2013-10-22 | Hewlett-Packard Development Company, L.P. | Inkjet ink including polyurethane |
WO2010090652A1 (en) * | 2009-02-03 | 2010-08-12 | Hewlett-Packard Development Company, L.P. | An inkjet ink including polyurethane |
JP5413702B2 (ja) * | 2011-09-09 | 2014-02-12 | Dic株式会社 | 複合顔料及びその製造方法 |
JP5878722B2 (ja) * | 2011-09-30 | 2016-03-08 | 大日本塗料株式会社 | 水系顔料インク組成物及びその印刷方法 |
ES2668947T3 (es) * | 2014-04-18 | 2018-05-23 | Lamberti Spa | Aditivo para tintas de inyección |
US10273374B2 (en) | 2015-04-27 | 2019-04-30 | Hewlett-Packard Development Company, L.P. | Fluid sets for inkjet imaging |
US10464341B2 (en) | 2015-04-27 | 2019-11-05 | Hewlett-Packard Development Company, L.P. | Fluid sets for inkjet imaging |
US10414933B2 (en) | 2015-04-27 | 2019-09-17 | Hewlett-Packard Development Company, L.P. | White inks |
CN107406698B (zh) | 2015-04-27 | 2021-04-20 | 惠普发展公司,有限责任合伙企业 | 白色墨水 |
BR112017018512B1 (pt) | 2015-04-27 | 2022-05-17 | Hewlett-Packard Development Company, L.P. | Dispersões de pigmento branco, método para produzir uma dispersão de pigmento branco e conjunto fluido para formar imagens a jato de tinta |
CN107406702A (zh) | 2015-04-27 | 2017-11-28 | 惠普发展公司,有限责任合伙企业 | 白色墨水 |
JP6928655B2 (ja) * | 2017-06-27 | 2021-09-01 | 富士フイルム株式会社 | 捺染用インクジェットインク、インクカートリッジ、インクセット、及びインクジェット捺染方法 |
CN111201261A (zh) * | 2017-10-11 | 2020-05-26 | 伊斯曼柯达公司 | 水性喷墨油墨组合物和油墨组 |
WO2020102788A1 (en) | 2018-11-17 | 2020-05-22 | International Imaging Materials, Inc. | Outdoor durable inkjet inks |
EP3933001A4 (en) * | 2019-02-28 | 2022-04-20 | FUJIFILM Corporation | COLORED RESIN PARTICLE DISPERSION, INK, INKS SET AND INKJET PRINTING METHOD |
CN109880038B (zh) * | 2019-03-05 | 2021-09-28 | 广州浦利姆环保科技有限公司 | 水性聚氨酯及其制备方法、水性色浆 |
KR20220020365A (ko) | 2019-07-16 | 2022-02-18 | 바스프 코팅스 게엠베하 | 일액형 폴리우레탄 분산액, 그의 제조법 및 용도 |
WO2022218923A1 (en) | 2021-04-16 | 2022-10-20 | Basf Se | Aqueous polyurethane and polyurethane/poly(meth)acrylate hybrid dispersions |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06279718A (ja) | 1993-03-26 | 1994-10-04 | Canon Inc | インクジェット用記録液及びこれを用いたインクジェット記録方法及び記録機器 |
JPH08218015A (ja) * | 1995-02-14 | 1996-08-27 | Dainippon Ink & Chem Inc | ジェットインク用ポリマー微粒子及びそれを含有するジェットインク |
JP2002167536A (ja) * | 2000-06-14 | 2002-06-11 | Mitsubishi Chemicals Corp | 記録液およびインクジェット記録方法 |
JP2004300393A (ja) | 2003-04-01 | 2004-10-28 | Seiko Epson Corp | インクジェット記録用インク組成物、該インク組成物を用いた記録方法及び記録物 |
JP2005515289A (ja) | 2002-01-16 | 2005-05-26 | イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー | 耐汚れ性インクジェットインク |
JP2008024733A (ja) * | 2006-07-18 | 2008-02-07 | Toray Ind Inc | 水性顔料分散液、及びそれを用いたインク組成物 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0616017B1 (en) * | 1993-03-15 | 1999-08-18 | Canon Kabushiki Kaisha | Ink, ink-jet recording process making use of the ink, and apparatus using the ink |
DE60107764T2 (de) * | 2000-06-14 | 2006-03-02 | Mitsubishi Chemical Corp. | Aufzeichnungsflüssigkeit und Tintenstrahlaufzeichnungsverfahren |
JP3922460B2 (ja) | 2004-01-23 | 2007-05-30 | 大日本インキ化学工業株式会社 | ジェットインク用ポリマー微粒子及びジェットインク |
DE102005005846A1 (de) * | 2005-02-08 | 2006-08-17 | Basf Ag | Feste Pigmentzubereitungen, enthaltend wasserlösliche oberflächenaktive Additive auf Polyurethanbasis |
-
2009
- 2009-09-16 KR KR1020117003026A patent/KR101292234B1/ko not_active IP Right Cessation
- 2009-09-16 CA CA 2738462 patent/CA2738462C/en not_active Expired - Fee Related
- 2009-09-16 EP EP09816080.7A patent/EP2341110B1/en active Active
- 2009-09-16 CN CN200980138266XA patent/CN102165024B/zh active Active
- 2009-09-16 US US13/121,547 patent/US8198391B2/en active Active
- 2009-09-16 JP JP2010511005A patent/JP4618521B2/ja active Active
- 2009-09-16 WO PCT/JP2009/066121 patent/WO2010035665A1/ja active Application Filing
- 2009-09-28 TW TW98132640A patent/TWI445780B/zh not_active IP Right Cessation
-
2011
- 2011-10-28 HK HK11111679A patent/HK1157373A1/xx not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06279718A (ja) | 1993-03-26 | 1994-10-04 | Canon Inc | インクジェット用記録液及びこれを用いたインクジェット記録方法及び記録機器 |
JPH08218015A (ja) * | 1995-02-14 | 1996-08-27 | Dainippon Ink & Chem Inc | ジェットインク用ポリマー微粒子及びそれを含有するジェットインク |
JP2002167536A (ja) * | 2000-06-14 | 2002-06-11 | Mitsubishi Chemicals Corp | 記録液およびインクジェット記録方法 |
JP2005515289A (ja) | 2002-01-16 | 2005-05-26 | イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー | 耐汚れ性インクジェットインク |
JP2004300393A (ja) | 2003-04-01 | 2004-10-28 | Seiko Epson Corp | インクジェット記録用インク組成物、該インク組成物を用いた記録方法及び記録物 |
JP2008024733A (ja) * | 2006-07-18 | 2008-02-07 | Toray Ind Inc | 水性顔料分散液、及びそれを用いたインク組成物 |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012072361A (ja) * | 2010-08-31 | 2012-04-12 | Canon Inc | インク、インクカートリッジ、及びインクジェット記録方法 |
JP2012072360A (ja) * | 2010-08-31 | 2012-04-12 | Canon Inc | インク、インクカートリッジ、及びインクジェット記録方法 |
CN102746714A (zh) * | 2012-05-02 | 2012-10-24 | 中国皮革和制鞋工业研究院 | 一种耐迁移皮革染料的制备方法 |
JP2015120818A (ja) * | 2013-12-24 | 2015-07-02 | Dic株式会社 | 水性顔料分散体、及びインクジェット記録用水性インク |
JP2016130278A (ja) * | 2015-01-13 | 2016-07-21 | Dic株式会社 | 水性顔料分散体、及びインクジェット記録用水性インク |
JP2019023266A (ja) * | 2017-07-25 | 2019-02-14 | 三洋化成工業株式会社 | 複合粒子水性分散体 |
Also Published As
Publication number | Publication date |
---|---|
US20110184123A1 (en) | 2011-07-28 |
EP2341110A1 (en) | 2011-07-06 |
US8198391B2 (en) | 2012-06-12 |
TW201016802A (en) | 2010-05-01 |
JP4618521B2 (ja) | 2011-01-26 |
KR101292234B1 (ko) | 2013-08-01 |
CA2738462C (en) | 2013-07-02 |
TWI445780B (zh) | 2014-07-21 |
KR20110031225A (ko) | 2011-03-24 |
JPWO2010035665A1 (ja) | 2012-02-23 |
CA2738462A1 (en) | 2010-04-01 |
CN102165024B (zh) | 2013-08-28 |
EP2341110A4 (en) | 2012-03-07 |
HK1157373A1 (en) | 2012-06-29 |
EP2341110B1 (en) | 2018-05-16 |
CN102165024A (zh) | 2011-08-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4618521B2 (ja) | 顔料分散液及びインクジェット記録用水性インク | |
JP2008266595A (ja) | 顔料分散液及びインクジェット記録用水性インク | |
JP6977500B2 (ja) | 水性記録液セット、およびそれらを用いた印刷物の製造方法 | |
EP2559740B1 (en) | Binder for inkjet printing ink and inkjet printing ink and printed matter containing same | |
US8757788B2 (en) | Ink jet ink, ink cartridge, and ink jet recording method | |
JP5736833B2 (ja) | インクジェット記録用水性インクの調製のための水性顔料分散体及びインクジェット記録用水性インク | |
US20120164400A1 (en) | Binder for ink-jet printing ink, ink-jet printing ink containing the same, and printed matter | |
JP2005515289A (ja) | 耐汚れ性インクジェットインク | |
JP5224008B2 (ja) | インクジェット記録用水性インクの調製のための水性顔料分散体及びインクジェット記録用水性インク | |
JP2017095554A (ja) | インク、インクジェット記録方法、及び記録物 | |
JP2008179657A (ja) | 水性顔料分散液、及びそれを用いたインク組成物 | |
JP6862692B2 (ja) | 水性顔料分散体の製造方法 | |
JP4389438B2 (ja) | 水性顔料分散体及び水性顔料記録液 | |
JP7332071B2 (ja) | 水性インクジェットインク用バインダー樹脂組成物、水性インクジェットインク及び印刷層 | |
JP3986861B2 (ja) | インクジェットプリンタ用インク組成物 | |
JP2008143960A (ja) | 水性顔料分散液、及びそれを用いたインク組成物 | |
JP2019206628A (ja) | インクジェットインキ及びその印刷物 | |
WO2016129585A1 (ja) | 水性顔料分散体の製造方法及びインクジェット記録用水性インク | |
JP6579357B2 (ja) | 水性顔料分散体および水性インク | |
JP2022098703A (ja) | 水性インクジェットインク用バインダー樹脂組成物、水性インクジェットインク及び印刷層 | |
JP2005047989A (ja) | インク組成物およびその製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200980138266.X Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2010511005 Country of ref document: JP |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 09816080 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 20117003026 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2738462 Country of ref document: CA |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13121547 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2009816080 Country of ref document: EP |