WO2022097747A1 - 水性樹脂用粘性調整剤および水性塗料組成物 - Google Patents
水性樹脂用粘性調整剤および水性塗料組成物 Download PDFInfo
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- WO2022097747A1 WO2022097747A1 PCT/JP2021/041013 JP2021041013W WO2022097747A1 WO 2022097747 A1 WO2022097747 A1 WO 2022097747A1 JP 2021041013 W JP2021041013 W JP 2021041013W WO 2022097747 A1 WO2022097747 A1 WO 2022097747A1
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Classifications
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- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/04—Thixotropic paints
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- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/43—Thickening agents
- C09D7/44—Combinations of two or more thickening agents
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- 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
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/26—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
- C08G69/265—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids from at least two different diamines or at least two different dicarboxylic acids
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- 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
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/26—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
- C08G69/34—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids using polymerised unsaturated fatty acids
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- 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
-
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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Definitions
- the present invention relates to a viscosity modifier for a water-based resin and a water-based coating composition.
- water-based paints are environmentally friendly paints, their application fields are increasing, and the adoption of water-based paints is also increasing in the anticorrosion paint field.
- Many types of thixotropic agents are used in these water-based paints, such as to prevent pigment settling and hard caking in paints during storage, to prevent paint sagging during painting, and to level the coated surface. Used for purposes.
- Examples of such a thixotropic agent include anti-sedimentation agents as described in Patent Document 1 and Patent Document 2.
- polyamide or the like obtained by reacting diamine with an excess dicarboxylic acid or the like with diamine is mainly composed of water after being neutralized with a neutralizing base (amine or the like).
- a settling inhibitor for water-based paints which is dispersed in a medium.
- the aqueous undercoat epoxy paint (main agent) used in the field of anticorrosion paint is neutralized by using a base such as amine.
- a base such as amine.
- the amide-based aqueous viscosity modifier was added, there was a problem that the epoxy resin as the main agent and the amine used for neutralization reacted and gelled.
- the pH of the main agent ranges from acidic to neutral, but when this main agent is mixed with an amine used as a curing agent, it becomes basic, so it precipitates in a wide range of pH from acidic to basic.
- a viscosity regulator for water-based resins which has effects such as prevention and sagging prevention, has been desired. Further, even when a water-based paint other than the water-based undercoat epoxy paint is used, there is a problem that the odor (amine odor, etc.) is unpleasant when a neutralizing base such as amine is used, and improvement is desired in this respect as well. There is.
- a thixotropic agent that does not use a neutralizing base as described above, for example, in Patent Document 3, fine particles of a diamide compound, which is a condensation reaction product of a hydrogenated castor oil fatty acid and a primary diamine, are used as an alcohol solvent.
- a paste-like thixotropic agent containing no granular product which is obtained by dispersing in a mixed solvent consisting of at least one solvent selected from a cyclic saturated hydrocarbon and an ester and heating the mixture, is disclosed. ..
- the paste-like thixotropic agent described in Patent Document 3 it is said that an amide-based paste-like thixotropic agent that does not contain granules in the paste that causes problems such as poor dispersion can be obtained.
- Patent Document 4 discloses a polyurethane-based thickener (urethane thickener) composed of polyoxyalkylene glycol and polyisocyanate. Urethane thickeners as described in Patent Document 4 are generally used for water-based paints.
- Japanese Unexamined Patent Publication No. 10-310726 Japanese Unexamined Patent Publication No. 2012-11182 Japanese Patent Application Laid-Open No. 2002-146336 Japanese Unexamined Patent Publication No. 11-199854
- the paste-like thixotropic agent described in Patent Document 3 uses a non-aqueous solvent such as a cyclic saturated hydrocarbon or an ester, and the thixotropic agent using such a non-aqueous solvent can be used as a water-based paint. It does not easily disperse in the aqueous resin solution used. Therefore, it is difficult to use the latexotropic agent of Patent Document 3 as a viscosity adjusting agent for water-based paints (water-based resin solutions).
- the urethane thickener as described in Patent Document 4 has a problem that the effects such as viscosity imparting effect, pseudoplasticity imparting effect, and thermal stability are inferior to those of the amide-based viscosity adjusting agent.
- the present invention has been made in view of the above circumstances, and it is possible to reduce the amount of the neutralizing base used in the viscosity regulator, and to improve the viscosity-imparting effect, the pseudoplasticity-imparting effect, and the thermal stability. It is an object of the present invention to provide a viscosity regulator for an aqueous resin and a water-based coating composition containing the viscosity regulator, which is excellent and capable of exerting these effects in a wide range of pH from acidic to basic. ..
- the present inventors have made a diamide compound having a specific structure and a solvent having a specific structure contained in the viscosity regulator for an aqueous resin. Therefore, the amount of the neutralizing base used in the viscosity regulator can be reduced, and the viscosity-imparting effect, the quasi-plasticity-imparting effect and the thermal stability are excellent, and these effects are in a wide range from acidic to basic. It was found that it can be exhibited at the pH of the above, and the present invention was completed based on this finding.
- the present invention comprises a diamine component (A1) selected from the group consisting of diamines having 2 to 12 carbon atoms and a monocarboxylic acid component (A2) selected from the group consisting of monocarboxylic acids having at least a hydroxyl group.
- a diamine component (A1) selected from the group consisting of diamines having 2 to 12 carbon atoms
- a monocarboxylic acid component (A2) selected from the group consisting of monocarboxylic acids having at least a hydroxyl group.
- the first solvent (C) having at least one substituent selected from the group consisting of ketone groups.
- the total content of the diamide compound (A) and the hydrogenated castor oil (A') is 60 parts by mass or more when the total amount of the viscosity-imparting component (X) is 100 parts by mass. It is a viscosity adjusting agent for an aqueous resin, which is characterized by the above.
- the polyamide compound (B) further contains the compound (B), the acid value of the polyamide compound (B) is 30 to 140, and the total amount of the viscosity-imparting component (X) is 100 parts by mass.
- the content of the above may be 40 parts by mass or less.
- the first solvent (C) is a solvent having an HLB value of 3 to 10 calculated by the Davis method.
- the first solvent (C) is a group consisting of an alcohol solvent, a glycol solvent, a diglycol solvent, a triglycol solvent, an ester solvent and an amide solvent. It is preferably at least one solvent of choice.
- the nonionic surfactant (E) having an HLB value of 3 to 18.5 calculated by the Griffin method is further contained, and the content of the surfactant (E) is the diamide compound. It may be 300 parts by mass or less with respect to 100 parts by mass of (A) and / or hydrogenated castor oil (A').
- the second solvent (F) having a higher polarity than the first solvent (C) is further contained, and the content of the second solvent (F) is 20 mass by mass. It may be less than or equal to%.
- water (D) may be further contained, and the content of the water (D) may be 80% by mass or less.
- the present invention is a water-based coating composition containing a water-based resin, a pigment, and the above-mentioned viscosity adjusting agent for water-based resin.
- the content of the viscosity-imparting component (X) is 0.1% by mass to 1.0% by mass with respect to the total solid content of the aqueous coating composition. It may be contained in an amount of%.
- the amount of the neutralizing base used in the viscosity adjusting agent by containing a diamide compound having a specific structure and a solvent having a specific structure in the viscosity adjusting agent for an aqueous resin.
- the effect of imparting viscosity to water-based paints containing this viscosity modifier, the effect of imparting pseudoplasticity, and the thermal stability of water-based paints are excellent, and these effects can be exerted in a wide range from acidic to basic. It becomes possible to exert at pH.
- the viscosity adjusting agent according to the present invention is an additive used together with an aqueous resin in an aqueous coating composition, and comprises a viscosity-imparting component (X) containing a diamide compound (A) and / or hydrogenated castor oil (A'). It contains the first solvent (C) as an essential component.
- the amount of the neutralizing base used in the viscosity regulator can be reduced, and the viscosity-imparting effect, the quasi-plasticity-imparting effect, and the water-based paint to the water-based paint containing the viscosity regulator can be reduced. It has excellent thermal stability and can exert these effects in a wide range of pH from acidic to basic.
- the viscosity-imparting effect in the present invention means the effect of increasing the viscosity (thickening) of the water-based paint to which the viscosity adjusting agent is added.
- the effect of imparting pseudoplasticity in the present invention refers to the effect of imparting the property of reducing the viscosity of the water-based paint to which the viscosity modifier is added when it is subjected to shear stress.
- the thermal stability in the present invention means a property that the change in sedimentation prevention property due to a temperature change is small.
- the viscosity-imparting component (X) is an active ingredient added to impart viscosity and quasi-plasticity to the aqueous coating composition to which the viscosity modifier is added and to enhance the thermal stability of the aqueous coating composition. Is.
- the viscosity-imparting component (X) contains at least one of the diamide compound (A) and the hydrogenated castor oil (A') as an essential component. Further, the polyamide compound (B) is included as an optional component of the viscosity-imparting component (X).
- the viscosity-imparting component (X) contained in the viscosity modifier according to the present invention includes (1) only the diamide compound (A), (2) only the hydrogenated castor oil (A'), and (3) the diamide compound (A). ) And hydrogenated castor oil (A'), (4) combination of diamide compound (A) and polyamide compound (B), (5) combination of hydrogenated castor oil (A') and polyamide compound (B), diamide compound. There may be a combination of (A), hydrogenated castor oil (A') and polyamide compound (B). As shown in Examples described later, it is preferable to contain at least the diamide compound (A) as the viscosity-imparting component (X) from the viewpoint of improving the thermal stability.
- the diamide compound (A) according to the present invention is a fatty acid diamide obtained by reacting a diamine component (A1) with a monocarboxylic acid component (A2).
- a diamine component (A1) selected from the group consisting of diamines having 2 to 12 carbon atoms and a group consisting of linear saturated fatty acids having at least a hydroxyl group are used.
- a monocarboxylic acid component (A2) to be selected.
- Examples of the diamine component (A1) and the monocarboxylic acid component (A2) include the compounds exemplified below.
- the reaction conditions reaction temperature, compounding ratio of each component, etc.
- a dehydration aid such as xylene can be used if necessary.
- Diamine component (A1) Examples of the diamine component (A1) according to the present invention include ethylenediamine (EDA), propylenediamine, tetramethylenediamine (TMDA), hexamethylenediamine (HMDA), octamethylenediamine (OMDA), dodecamethylenediamine (DMDA) and the like.
- EDA ethylenediamine
- TMDA propylenediamine
- HMDA hexamethylenediamine
- OMDA octamethylenediamine
- DMDA dodecamethylenediamine
- Aromatic diamines such as aliphatic diamines, orthoxylylenediamines, metaxylylenediamines (MXDA), paraxylylenediamines (PXDA), diaminodiphenylmethanes, diaminodiphenyl ethers, diaminodiphenylsulfones, methylenebischloroaniline, piperazine, isophoronediamines.
- Alicyclic diamines such as can be used.
- the main component of the diamide compound (A) By using the hydroxyl group-containing diamide obtained by reacting these diamines with a monocarboxylic acid having at least a hydroxyl group, which will be described later, as the main component of the diamide compound (A), a sufficient effect of imparting viscosity, an effect of imparting pseudoplasticity and an effect of imparting pseudoplasticity can be obtained. Thermal stability is obtained. However, in order to further enhance the viscosity-imparting effect, the pseudo-plasticity-imparting effect, and the thermal stability effect, among the above-mentioned diamines, straight-chain or branched-chain diamines (for example, EDA, TMDA, HMDA, OMDA, DMDA, etc.) Is preferably used as the diamine component (A1). Further, from the viewpoint of improving the sedimentation prevention property, it is preferable to use a diamine having 10 or less carbon atoms as the diamine component (A1).
- the monocarboxylic acid component (A2) is not particularly limited as long as it contains at least a monocarboxylic acid having a hydroxyl group.
- Examples of the monocarboxylic acid having a fatty acid include acetic acid, propionic acid, butyric acid, valeric acid, caproic acid, enanthic acid, capric acid, pelargonic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid and arachidic acid.
- the carbon number of the alkanoic acid is preferably 16 or less from the viewpoint of improving thermal stability.
- reaction molar ratio (A1 / A2) of the diamine component (A1) to the monocarboxylic acid component (A2) when synthesizing the diamide compound (A) is 1: 2 in order to prevent unreacted groups from remaining. Is preferable.
- the reaction molar ratio (A1 / A2) means the ratio (molar ratio) of the amount of the diamine component (A1) to the amount of the monocarboxylic acid component (A2).
- Hydrogenated castor oil (A') is a triglyceride of saturated fatty acid obtained by hydrogenating castor oil, and is a compound having no ethylene oxide (EO) chain.
- Commercially available products can be used as the hydrogenated castor oil (A'), and examples of commercially available products include C-wax (manufactured by Ogura Synthetic Industry Co., Ltd.), Kao wax 85P (manufactured by Kao Corporation), and castor oil. (Manufactured by Sankei Sangyo Co., Ltd.) and the like.
- the viscosity-imparting component (X) according to the present invention contains at least one of the above-mentioned diamide compound (A) and hydrogenated castor oil (A') as an essential component, but in addition to these, as an optional component.
- the polyamide compound (B) may be contained.
- the polyamide compound (B) is a polyamide obtained by reacting a diamine component (B1) with an excess amount of a dicarboxylic acid component (B2) with the diamine component (B1).
- the polyamide compound (B) is obtained by reacting the above diamine component (B1) with the dicarboxylic acid component (B2), and has any chemical structure as long as it is a polymer compound having an amide bond (-CONH-). Even a polyamide having a above can be used.
- the reaction conditions reaction temperature, compounding ratio of each component, etc.
- a dehydration aid such as xylene can be used if necessary.
- the reaction molar ratio (B1 / B2) of the diamine component (B1) and the dicarboxylic acid component (B2) is preferably less than 1.
- the reaction molar ratio (B1 / B2) means the ratio (molar ratio) of the amount of the amine component (B1) to the amount of the carboxylic acid component (B2).
- Diamine component (B1) At least one amine selected from the group consisting of diamines having 2 to 12 carbon atoms can be used.
- the diamine include aliphatic diamines such as ethylenediamine (EDA), propylenediamine, tetramethylenediamine (TMDA), hexamethylenediamine (HMDA), octamethylenediamine (OMDA), and dodecamethylenediamine (DMDA), and xylylenedi.
- EDA ethylenediamine
- TMDA tetramethylenediamine
- HMDA hexamethylenediamine
- OMDA octamethylenediamine
- DMDA dodecamethylenediamine
- diamine component (B1) examples thereof include aromatic diamines such as amines, diaminodiphenyl ethers and diaminodiphenyl sulfones, and alicyclic diamines such as piperazine and isophorone diamines.
- aromatic diamines such as amines, diaminodiphenyl ethers and diaminodiphenyl sulfones
- alicyclic diamines such as piperazine and isophorone diamines.
- Each of these compounds used as the diamine component (B1) can be used alone or in admixture of two or more.
- Dicarboxylic acid component (B2) for example, at least one carboxylic acid selected from dicarboxylic acids having 4 to 36 carbon atoms can be used.
- the dicarboxylic acid include succinic acid, glutaric acid, adipic acid, pimelli acid, suberic acid, azelaic acid, sebacic acid, dodecanedioic acid, maleic acid, fumaric acid, phthalic acid, isophthalic acid, terephthalic acid and dimer acid. And so on.
- Dimer acid is a polymerized fatty acid obtained by polymerizing (dimulating) unsaturated fatty acids (for example, unsaturated fatty acids having 18 or 22 carbon atoms) obtained from vegetable oils such as soybean oil, tall oil, flaxseed oil, and cottonseed oil. Generally, dimer acids having 36 carbon atoms are commercially available. Commercially available dimer acids contain monomeric acids and trimer acids in addition to dimer acids, but those having a high content of dimer acids are preferable. Each of these compounds used as the dicarboxylic acid component (B2) can be used alone or in admixture of two or more.
- the dicarboxylic acid component (B2) is used.
- it preferably contains at least a polymerized fatty acid.
- the polymerized fatty acid used as the dicarboxylic acid component (B2) of the present invention is a polymer obtained by polymerizing a monobasic fatty acid having an unsaturated bond, or an ester of a monobasic fatty acid having an unsaturated bond. It is a obtained polymer.
- the monobasic fatty acid having an unsaturated bond an unsaturated fatty acid having 1 to 3 unsaturated bonds and having a total carbon number of 8 to 24 is usually used.
- these unsaturated fatty acids include oleic acid, linoleic acid, linolenic acid, natural drying oil fatty acids, and natural semi-drying oil fatty acids.
- the ester of the monobasic fatty acid having an unsaturated bond include an ester of the monobasic fatty acid having an unsaturated bond and an aliphatic alcohol, preferably an aliphatic alcohol having 1 to 3 carbon atoms.
- the one particularly suitable as the dicarboxylic acid component (B2) is dimer acid.
- the acid value of the polyamide compound (B) according to the present invention is preferably 30 or more and 140 or less.
- the acid value of the polyamide compound (B) is preferably 30 or more and 140 or less.
- the acid value in the present specification can be measured according to JIS K0070-1992.
- the acid value refers to the number of mg of potassium hydroxide required to neutralize free fatty acids and the like contained in 1 g of the sample.
- there are two methods for measuring the acid value a neutralization titration method and a potentiometric titration method, and the acid value in the present specification is a value measured by the neutralization titration method.
- the total amount of the viscosity-imparting component (X) is 100 parts by mass
- the total content of the diamide compound (A) and the hydrogenated castor oil (A') is It is necessary to have 60 parts by mass or more.
- the content of the polyamide compound (B) is preferably 40 parts by mass or less.
- the ratio [Q (A + A'): Q (B)] is in the range of 60:40 to 100: 0.
- the content of the viscosity-imparting component (X) in the viscosity adjusting agent according to the present invention is 1% by mass or more and 30% by mass or less. If the content of the viscosity-imparting component (X) is less than 1% by mass, the viscosity-imparting effect and the pseudo-plasticity-imparting effect of the viscosity-adjusting agent on the aqueous coating composition may not be obtained.
- the content of the viscosity-imparting component (X) exceeds 30% by mass, the dispersibility of the viscosity-imparting component (X) in a water-based medium is lowered, and the water-based coating composition is prevented from settling. Thermal stability may deteriorate.
- the content of the viscosity-imparting component (X) is preferably 3.0% by mass or more and 20.0% by mass or less, and is 3.0% by mass or more and 15.0% by mass or less. Is more preferable.
- Neutralizing base (G) In the viscosity modifier according to the present invention, in order to disperse the polyamide compound (B) in a medium mainly composed of water (that is, as a hydrophilization aid that helps the polyamide compound (B) to become hydrophilic). It does not prohibit the use of neutralizing bases such as amines. However, as described above, when a neutralizing base is used, a viscosity modifier containing a polyamide neutralized with an amine is added to the aqueous undercoat epoxy paint (main agent) used in the field of anticorrosion paints.
- the content of the neutralizing base (G) is as small as possible. From such a viewpoint, for example, the content of the neutralizing base (G) is preferably 2% by mass or less in the viscosity adjusting agent, and the neutralizing base (G) is substantially not contained. More preferred.
- a neutralizing base either an organic base or an inorganic base can be used.
- organic base for example, alkylamines such as ethylamine, diethylamine and triethylamine, alcoholamines such as ethanolamine, diethanolamine, triethanolamine and N, N'-dimethylethanolamine can be used.
- inorganic base for example, sodium hydroxide, potassium hydroxide, ammonia and the like can be used. These may be used alone or in combination of a plurality of types.
- the viscosity adjusting agent for an aqueous resin according to the present invention contains a first solvent (C) as an essential component in addition to the viscosity-imparting component (X) described above.
- the first solvent (C) is used to facilitate the dispersion of the viscosity-imparting component (X) in a medium mainly composed of water. Further, by mixing the viscosity-imparting component (X) with the first solvent (C) and heat-treating the mixture, it is possible to exhibit the viscosity-imparting effect and the pseudo-plasticity-imparting effect on the aqueous coating composition.
- the first solvent (C) is used as an activation aid that helps the viscosity-imparting component (X) to develop the viscosity-imparting effect and the pseudo-plasticity-imparting effect (activation of the viscosity-imparting component (X)).
- the first solvent (C) a solvent having at least one substituent selected from the group consisting of a hydroxyl group, an ether group, an ester group, an amide group and a ketone group can be used.
- the first solvent (C) include alcohol-based solvents, glycol-based solvents, diglycol-based solvents, triglycol-based solvents, ester-based solvents, and amide-based solvents.
- the alcohol solvent examples include fatty alcohols such as methanol, ethanol, propanol, butanol, isobutanol, isopropanol, pentanol, hexanol, heptanol, octanol and 2-ethylhexanol, and cyclic alcohols such as benzyl alcohol. Can be mentioned.
- glycol-based solvent examples include ethylene glycol monomethyl ether, ethylene glycol monoisopropyl ether, ethylene glycol monobutyl ether, ethylene glycol monoisobutyl ether, ethylene glycol monohexyl ether, 2-ethylhexyl glycol, propylene glycol monomethyl ether, and propylene glycol monopropyl.
- examples include ether, propylene glycol monobutyl ether, and phenyl glycol.
- diglycol solvent examples include diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monobutyl ether and the like.
- Examples of the triglycol-based solvent include triethylene glycol monomethyl ether and triethylene glycol monobutyl ether.
- Examples of the ester solvent include dibasic acid esters such as methyl glutarate, methyl succinate, and methyl adipic acid, propylene glycol monomethyl acetate, amyl propionate, ethyl ethoxypropionate, and 2,2,4-trimethyl. Examples thereof include pentandiol monoisobutyrate.
- amide-based solvent examples include acyclic amides such as dimethylformamide, diethylformamide, dimethylacetamide, 3-methoxy-N, N-dimethylpropanamide and hexamethylphosphoamide, and cyclic amides such as N-methylpyrrolidone. Can be mentioned.
- polyhydric alcohols such as ethylene glycol, propylene glycol, butylene glycol, glycerin, sorbitol, and xylitol can also be used as the solvent (C).
- the solvents listed above can be used alone or in combination of two or more.
- the HLB value of the first solvent (C) is within the range of 3 or more and 10 or less. It is preferable to use a certain solvent. Examples of such a solvent include ethylhexanol, butanol, 2-ethylhexyl glycol, phenylglycol, propylene glycol monobutyl ether, ethylene glycol monobutyl ether, propylene glycol monomethyl ether, dipropylene glycol monobutyl ether, diethylene glycol monobutyl ether, and dipropylene glycol.
- a solvent include ethylhexanol, butanol, 2-ethylhexyl glycol, phenylglycol, propylene glycol monobutyl ether, ethylene glycol monobutyl ether, propylene glycol monomethyl ether, dipropylene glycol monobutyl ether, diethylene glycol monobutyl ether, and dipropylene glycol.
- Examples thereof include monomethyl ether, diethylene glycol monoethyl ether, triethylene glycol monobutyl ether, triethylene glycol monomethyl ether, 2,2,4-trimethylpentanediol monoisobutyrate, and propylene glycol monomethyl acetate.
- HLB value of the first solvent (C) the value calculated by the Davis method is used.
- the content of the first solvent (C) in the viscosity adjusting agent according to the present invention is 5% by mass or more and 99% by mass or less.
- the viscosity adjusting agent has an effect of imparting viscosity and a pseudoplasticity to the aqueous coating composition, and an effect of improving the thermal stability of the aqueous coating composition. May not be obtained.
- the upper limit of the content of the first solvent (C) is not particularly limited, but since the viscosity adjusting agent of the present invention contains 1% by mass or more of the viscosity-imparting component (X) as an essential component.
- the content of the first solvent (C) is 99% by mass. From the viewpoint of improving thermal stability, the content of the first solvent (C) is preferably 10% by mass to 99% by mass.
- the viscosity adjusting agent according to the present invention is for an aqueous resin, and is obtained by dispersing a viscosity-imparting component (X), which is an active ingredient, in a medium mainly composed of water.
- a viscosity-imparting component (X) which is an active ingredient
- a medium mainly composed of water for example, ion-exchanged water can be used.
- Water (D) is not an essential component of the viscosity modifier according to the present invention (that is, water (D) may not be contained in the viscosity modifier), but the first solvent (C) described above.
- the content of) is preferably as small as possible from the viewpoint of the influence on the environment and the human body, and the content of the solvent (C) can be reduced by containing water (D).
- the content of water (D) is contained.
- the amount is preferably 80% by mass or less with respect to the total mass of the viscosity modifier.
- the viscosity modifier according to the present invention may contain a surfactant (E) as an optional component.
- This surfactant (E) is used as a hydrophilization aid for hydrophilizing the viscosity-imparting component (X) and facilitating the dispersion of the viscosity-imparting component (X) in a medium mainly composed of water. ..
- the surfactant (E) include polyoxyethylene hydrogenated castor oil, polyoxyethylene castor oil, polyoxyethylene stearyl ether, polyoxyethylene 2-ethylhexyl ether, and polyoxyethylene alkyl such as polyoxyethylene styrylated phenyl ether.
- Polyoxyethylene glycerin fatty acid esters such as ether, polyoxyethylene hydrogenated castor oil monoisostearate, polyoxyethylene hydrogenated castor oil triisostearate, polyoxyethylene glyceryl monoisostearate, and polyoxy such as polyoxyethylene sorbitan monostearate. Examples thereof include ethylene sorbitan aliphatic ester and polyoxyethylene oxypropylene copolymer.
- the type of the surfactant (E) used in the present invention if it is a nonionic surfactant, it can exhibit good sedimentation prevention property and thermal stability.
- the HLB value of the surfactant (E) is high. It is preferable to use a nonionic surfactant in the range of 3 or more and 18.5 or less. As the HLB value of the surfactant (E), the value calculated by the Griffin method is used. Similarly, from the viewpoint of enhancing the sagging prevention property, it is preferable to use a compound containing no aromatic ring as the surfactant (E).
- the number of moles of ethylene oxide (EO) added is preferably 3 mol or more and 200 mol or less.
- the number of moles of EO added is more preferably 10 mol or more and 200 mol or less, and 10 mol or more and 100 mol or less. It is more preferable to have.
- the number of moles of EO added is 10 mol or more and 200 mol or less.
- the content of the surfactant (E) according to the present invention is preferably 300 parts by mass or less with respect to 100 parts by mass of the diamide compound (A) and / or the hydrogenated castor oil (A').
- the content of the surfactant (E) is 100 parts by mass with respect to the diamide compound (A) and / or the hydrogenated castor oil (A'). It is more preferably 200 parts by mass or less.
- the content of the surfactant (E) shall be 40 parts by mass or more with respect to 100 parts by mass of the diamide compound (A) and / or the hydrogenated castor oil (A'). Is more preferable.
- the viscosity modifier according to the present invention may contain a second solvent (F) as an optional component.
- the second solvent (F) has a role of improving the dispersibility of the viscosity adjusting agent in the aqueous coating composition.
- a solvent different from the first solvent (C) and having a relatively higher polarity than the first solvent (C) is used.
- alcohol, polyhydric alcohol, glycol, diglycol, triglycol and the like can be used.
- Examples of the alcohol include fatty alcohols such as methanol, ethanol, propanol, butanol, isobutanol, isopropanol, pentanol, hexanol, heptanol, octanol and 2-ethylhexanol, and cyclic alcohols such as benzyl alcohol. Be done.
- Examples of the polyhydric alcohol include ethylene glycol, propylene glycol, butylene glycol, butanediol, diethylene glycol, glycerin, sorbitol, xylitol and the like.
- glycol examples include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monoisopropyl ether, ethylene glycol monobutyl ether, ethylene glycol monoisobutyl ether, ethylene glycol monohexyl ether, 2-ethylhexyl glycol, and propylene glycol monomethyl ether.
- examples thereof include propylene glycol monopropyl ether, propylene glycol monobutyl ether, and phenyl glycol.
- Examples of the diglycol include diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, dipropylene glycol monomethyl ether, and dipropylene glycol monobutyl ether.
- Examples of the triglycol include triethylene glycol monomethyl ether and triethylene glycol monobutyl ether.
- the content of the second solvent (F) according to the present invention is preferably 20% by mass or less with respect to the total mass of the viscosity modifier.
- the effect of adding the second solvent (F) (the effect of improving the stability of the paint) can be further enhanced.
- the content of the second solvent (F) is more preferably 10% by mass or less.
- the content of the second solvent (F) is more preferably 10% by mass or less, and further preferably 5% by mass or less.
- the viscosity modifier for an aqueous resin of the present invention may contain an auxiliary agent for the purpose of imparting other functions.
- various auxiliaries may be added for the purpose of improving the gloss retention of the coating film, the dispersibility of the pigment, the defoaming property of the aqueous coating composition, the sinking surface, and the like.
- the viscosity modifier containing each of the above-mentioned components can be produced, for example, as follows. First, water (D) or, if necessary, a mixed solution in which a first solvent (C) or a second solvent (F) is mixed with water is cooled, and then cold water or a cooling solution (hereinafter, "cold water or the like"). It is described as.). At this time, the temperature of cold water or the like is not particularly limited, but may be, for example, about 5 to 15 ° C. On the other hand, a mixed solution is prepared by mixing the viscosity-imparting component (X) and the first solvent (C) (if necessary, further the surfactant (E)).
- the mixing conditions for preparing the mixed solution are not particularly limited, but the mixing efficiency is improved when each component is in a dissolved state, so that the mixture is usually mixed at a temperature of 90 to 150 ° C.
- the neutralizing base (G) is added to the mixed solution to neutralize the polyamide compound (B).
- the dispersion obtained as described above is transferred to a container, and this dispersion is heated.
- the heating temperature when the dispersion is heated is not particularly limited, but is preferably 45 to 90 ° C, more preferably 50 to 90 ° C.
- the heating treatment time of the dispersion is not particularly limited, but is preferably 5 to 60 hours, more preferably 10 to 48 hours.
- the use of the viscosity adjusting agent according to the present invention is not particularly limited as long as it is added to the water-based paint together with the water-based resin, but the viscosity adjusting agent according to the present invention is, for example, an aluminum pigment or mica. It can be suitably used for a water-based metallic paint using such a pearl pigment, or a water-based anticorrosion paint using a pigment having a large particle system and a large specific gravity such as an anticorrosion pigment. Further, the viscosity adjusting agent according to the present invention can be suitably used for water-based paints using general coloring pigments and extender pigments other than the above, water-based coating materials such as water-based inks, and the like.
- the water-based coating composition according to the present invention contains a water-based resin, a pigment, and the above-mentioned viscosity adjusting agent for water-based resin as essential components. Further, the aqueous coating composition of the present invention may further contain other additives such as an antifoaming agent, a film-forming auxiliary, and a pH adjuster as optional components.
- the viscosity adjusting agent for a water-based resin of the present invention varies depending on the type of the water-based resin which is a binder in the water-based paint composition, the blending composition of the pigment and the like, but usually, the content of the viscosity-imparting component (X) is the water-based paint. It is contained in an amount of 0.1% by mass or more and 1.0% by mass or less with respect to the total solid content of the composition.
- the effect of adding the viscosity adjusting agent (the effect of imparting viscosity and the effect of imparting pseudoplasticity to the water-based paint composition, and the effect of improving the thermal stability of the water-based paint composition) can be obtained. It can be further enhanced.
- the aqueous resin contained as a binder in the aqueous coating composition according to the present invention has a resin component dispersed in a medium mainly composed of water, and examples of the resin component include acrylic resins and acrylic silicone resins. Examples thereof include alkyd-based resin, polyester-based resin, urethane-based resin, epoxy-based resin, silicone resin, and fluororesin.
- the form of the aqueous resin is divided into water-soluble, colloidal dispersion, and emulsion according to the dispersion form, and any form can be applied.
- These resins are, for example, heat-curable, UV-curable, electron beam-curable, oxidative-curable, photocation-curable, peroxide-curable, and cured with a chemical reaction in the presence or absence of a catalyst. It may be a resin having a high glass transition point, and may be a film which does not involve a chemical reaction and becomes a film only by volatilizing the diluting medium.
- the curing agent include amino resins, melamine resins, isocyanate compounds, blocked isocyanate compounds and epoxy compounds.
- the pigment examples include extender pigments, coloring pigments and metallic pigments.
- the extender pigment for example, calcium carbonate (heavy calcium carbonate (GCC), precipitated calcium carbonate (PCC), etc.), barium sulfate, silicon dioxide, aluminum hydroxide, talc, mica, organic fiber, glass powder and the like can be used.
- the coloring pigments include titanium dioxide, carbon black, chrome yellow, cadmium yellow, ocher, titanium yellow, zinc chromate, petal handle, aluminosilicate, quinacridone, phthalocyanine, anthroquinone, and diketopyrrolopyrrole. Benzimidazolone type and isoindolinone type can be used.
- the metallic pigment for example, aluminum flakes, copper flakes, mica-like iron oxide, mica, and scaly powder in which mica is coated with a metal oxide can be used.
- the aqueous coating composition of the present invention contains other substances such as dehydrating agents (for example, silane coupling agents), adhesion improvers, surfactants, and curings, as long as the properties and the object of the present invention are not impaired.
- dehydrating agents for example, silane coupling agents
- adhesion improvers for example, adhesion improvers
- surfactants for example, surfactants, and curings
- Catalysts, film-forming aids, dryers, antifouling agents, sensitizers, antioxidants, light stabilizers, UV absorbers, water resistant agents, antiseptic and antifungal agents, defoamers, leveling agents, dispersants, flame retardants , Anti-static agents, release agents, deodorants, pH adjusters, fragrances and other additives can be contained.
- a two-component water-based epoxy paint components other than the above-mentioned viscosity modifier are mixed in a water-based medium such as ion-exchanged water while stirring to prepare an epoxy main agent. do.
- a viscosity adjusting agent is added to this epoxy main agent and dispersed in the epoxy main agent to prepare an epoxy main agent containing the viscosity adjusting agent.
- the aqueous epoxy paint can be produced by mixing the epoxy main agent thus produced with a curing agent such as an amine curing agent.
- the amine curing agent has a high viscosity of the curing agent itself, when a viscosity adjusting agent is added to the amine curing agent side, the viscosity is further increased and the handleability of the liquid is lowered.
- the viscosity of the epoxy main agent is not higher than the viscosity of the amine curing agent, even if the viscosity is increased by adding the viscosity adjusting agent, there is no demerit such as deterioration of handleability as in the case of adding it to the amine curing agent side.
- the viscosity modifier by adding the viscosity modifier to the epoxy main agent side, the high viscosity amine curing agent does not thicken, and the epoxy main agent with relatively low viscosity thickens, so the viscosity adjusting agent is moved to the amine curing agent side.
- the difference in viscosity between the epoxy main agent and the amine curing agent is smaller than when it is added. As described above, when the epoxy main agent and the amine curing agent are mixed, the difference in viscosity between the two liquids to be mixed becomes small, so that the epoxy main agent and the amine curing agent can be easily mixed.
- the timing of adding the viscosity modifier according to the present invention to the water-based paint may be the process of kneading the pigment as described above, or may be added after the water-based paint is manufactured, but further mastered. It is also possible to make a batch and add it. Further, as the equipment used for dispersing the viscosity adjusting agent and the pigment, those generally used for producing a water-based paint can be used. Further, the conditions of the stirring speed and the stirring time at the time of dispersing the viscosity adjusting agent and the pigment are not particularly limited, and may be appropriately set while confirming the dispersion state of the viscosity adjusting agent and the pigment.
- the water-based coating composition of the present invention can be suitably used for water-based metallic paints using pearl pigments such as aluminum pigments and mica, and water-based anticorrosion paints using pigments having a large particle size and a large specific gravity such as anticorrosion pigments. Further, the water-based paint composition of the present invention can be suitably used as a water-based paint using a general coloring pigment or extender pigment other than the above, a water-based coating material such as a water-based ink, or the like.
- a surfactant (E) 2.4 parts of polyoxyethylene hydrogenated castor oil having an HLB of 6.4 (trade name "Brownon CW-10", manufactured by Aoki Oil & Fat Co., Ltd.) was added to the first solvent (C).
- a 50% solution of 2.4 parts of ethylene glycol monobutyl ether was gradually added to the above-mentioned cold water after adding the mixed solution. After all the addition was completed, the obtained dispersion was transferred to a container and heated in a constant temperature bath at 75 ° C. for 24 hours to obtain a viscosity modifier of Production Example S20 shown in Table 3.
- Test Example 1 Evaluation of the water-based paint composition produced by Evaluation Formula 1
- the performance test of the viscosity modifier was performed using the aqueous two-component epoxy paint formulation (evaluation formulation 1) shown in Table 19 as the evaluation formulation.
- JR-600A (manufactured by Teika) 49.14 parts as a coloring pigment (titanium white), K-WHITE 140W (manufactured by Teika) 34.02 parts as a rust preventive pigment, and as an extender pigment.
- Barium sulfate (manufactured by Sakai Chemical Co., Ltd.) 100.17 parts and Tarku No. 1 (manufactured by Takehara Chemical Co., Ltd.) 43.47 parts, ion-exchanged water 98.28 parts as a diluent, and ADF-01 (Kusumoto) as a defoaming agent. After stirring and mixing 3.15 parts with Kasei Co., Ltd.
- evaluation criteria The evaluation of sedimentation prevention is the same at 25 ° C and 60 ° C (both A judgment, both B judgment, both C judgment).
- B There is a one-step difference in the evaluation of sedimentation prevention between 25 ° C and 60 ° C (A judgment and B judgment, B judgment and C judgment, C judgment and D judgment).
- C There is a difference of two stages in the evaluation of sedimentation prevention between 25 ° C and 60 ° C (A judgment and C judgment, B judgment and D judgment).
- D There is a difference of 3 stages in the evaluation of sedimentation prevention between 25 ° C and 60 ° C (A judgment and D judgment).
- D Undecidable (Evaluation of sedimentation prevention at 25 ° C and sedimentation prevention at 60 ° C are both D-judgment)
- Viscosity change rate (viscosity at 60 rpm 4 weeks after production / viscosity at 60 rpm on the day of production) x 100 (Evaluation criteria) A: Viscosity change rate is less than 168% (equivalent to blank) B: Viscosity change rate is 168% or more and less than 190% C: Viscosity change rate is 190% or more and less than 220% D: Viscosity change rate is 220% or more
- Test Example 2 Evaluation of water-based coating composition produced with evaluation formulation 1b
- the performance test of the viscosity modifier was performed using the aqueous two-component epoxy paint formulation (evaluation formulation 1b) shown in Table 20 as the evaluation formulation.
- the viscosity-imparting component (X) which is a component, in terms of mass
- the aqueous coating compositions of Examples 86 to 95 and Reference Examples 1 to 3 are used. (Before mixing with the curing agent) was manufactured.
- aqueous paint composition (before mixing with the curing agent) prepared as described above was transferred to a 50 mL glass bottle and allowed to stand in a constant temperature bath at 25 ° C. and 60 ° C. for 7 days to settle the pigment (iriodine) with respect to the total volume of the paint. ) was measured as a percentage of the volume (hereinafter referred to as "precipitation rate"). Based on this measured value, the sedimentation prevention property was evaluated according to the following criteria.
- Sedimentation rate is 80% or more
- B Sedimentation rate is 50% or more and less than 80%
- C Sedimentation rate is 25% or more and less than 50%
- D Sedimentation rate is less than 25%
- Test Example 3 Evaluation of water-based paint composition produced by Evaluation Formula 2
- the performance test of the viscosity modifier was performed using the acrylic emulsion paint formulation (evaluation formulation 2) shown in Table 21 as the evaluation formulation.
- NeoCryl XK-12 manufactured by DSM 586.58 parts as an acrylic resin, 27.38 parts of dipropylene glycol monomethyl ether and 23.48 parts of dipropylene glycol monobutyl ether as a film-forming aid.
- the pH was adjusted to 8.3 using 1.50 parts of N, N'-dimethylethanolamine as a pH adjuster to prepare a clear paint. ..
- This clear paint contains 13.88 parts of Iriodin (registered trademark) 504 Red (manufactured by Merck & Co., Ltd.), which is a metallic pigment, and any one of Production Examples S1 to S19, S71 to 83 and Comparative Production Examples H1 to H9 and H11. Addition of 0.6% by mass (mass conversion of viscosity-imparting component (X), which is an active ingredient), and dispersion using a lab disper ( ⁇ 40) at a rotation speed of 2000 rpm for 10 minutes, Examples 1 to 19 , 73-85 and Comparative Examples 6-15 were produced. The water-based coating composition of Comparative Example 13 was not evaluated as follows because the sample was separated.
- the water-based paint composition (acrylic emulsion paint) prepared as described above was diluted with ion-exchanged water so that the viscosity measured using Ford Cup # 4 was 27 seconds (25 ° C.), and the mixture was diluted.
- the paint was transferred to a 50 mL glass bottle. Then, the mixture was allowed to stand in a constant temperature bath at 25 ° C. and 60 ° C. for 7 days, and the percentage of the volume of the precipitated pigment (iriodine) to the volume of the total amount of the paint (hereinafter referred to as “precipitation rate”) was measured. Based on this measured value, the sedimentation prevention property was evaluated according to the following criteria.
- evaluation criteria The evaluation of sedimentation prevention is the same at 25 ° C and 60 ° C (both A judgment, both B judgment, both C judgment).
- B There is a one-step difference in the evaluation of sedimentation prevention between 25 ° C and 60 ° C (A judgment and B judgment, B judgment and C judgment, C judgment and D judgment).
- C There is a difference of two stages in the evaluation of sedimentation prevention between 25 ° C and 60 ° C (A judgment and C judgment, B judgment and D judgment).
- Test Example 4 Evaluation of water-based paint composition produced by Evaluation Formula 3
- the performance test of the viscosity modifier was performed using the acrylic melamine water-soluble paint formulation (evaluation formulation 3) shown in Table 22 as the evaluation formulation.
- WATERSOL S-727 (manufactured by DIC) 250.16 parts as acrylic resin, Cymel 303 (manufactured by Allnex) 35.87 parts and WATERSOL S-695 (manufactured by DIC) 23 as melamine resin.
- the paint was made.
- This clear paint has 17.57 parts of Iriodin (registered trademark) 504 Red (manufactured by Merck & Co., Ltd.), which is a metallic pigment, and the viscosity of any one of Production Examples S9, S24 to S51 and Comparative Production Examples H1 to H5, H10. Comparison with Examples 24 to 52 by adding 0.4% by mass of the adjusting agent (mass conversion of the viscosity-imparting component (X) which is an active ingredient) and dispersing for 10 minutes at a rotation speed of 2000 rpm using a lab disper ( ⁇ 40). The water-based paint compositions of Examples 16-21 were produced.
- Iriodin registered trademark
- 504 Red manufactured by Merck & Co., Ltd.
- the water-based paint composition (acrylic melamine water-soluble paint) prepared as described above was diluted with ion-exchanged water so that the viscosity measured with a B-type viscometer was 350 mPa ⁇ s (25 ° C.).
- the diluted paint was transferred to a 50 ml glass bottle. Then, it was allowed to stand in a constant temperature bath at 25 ° C. and 60 ° C. for 7 days, and the sedimentation rate of the pigment (iriodine) was measured. Based on this measured value, the sedimentation prevention property was evaluated according to the following criteria.
- evaluation criteria The evaluation of sedimentation prevention is the same at 25 ° C and 60 ° C (both A judgment, both B judgment, both C judgment).
- B There is a one-step difference in the evaluation of sedimentation prevention between 25 ° C and 60 ° C (A judgment and B judgment, B judgment and C judgment, C judgment and D judgment).
- C There is a difference of two stages in the evaluation of sedimentation prevention between 25 ° C and 60 ° C (A judgment and C judgment, B judgment and D judgment).
- D There is a difference of 3 stages in the evaluation of sedimentation prevention between 25 ° C and 60 ° C (A judgment and D judgment).
- D Undecidable (Evaluation of sedimentation prevention at 25 ° C and sedimentation prevention at 60 ° C are both D-judgment)
- the diamide compound (A) as the viscosity-imparting component (X).
- the monocarboxylic acid component (A2) contains at least a monocarboxylic acid (oxyacid) having a hydroxyl group, an aromatic diamine or an alkane having no hydroxyl group can be used as a raw material for the diamide compound (A). It can be seen that even if an acid or the like is contained, good sedimentation prevention property (C judgment or higher) and thermal stability are exhibited.
- the thermal stability tends to be slightly inferior (particularly, see Examples 7 and 8). Therefore, when alkanoic acid is contained as a raw material of the diamide compound (A), it is suggested that the number of carbon atoms is preferably 16 or less from the viewpoint of improving the thermal stability. As can be seen from Comparative Examples 11 to 13, when the monocarboxylic acid component (A2) does not contain a monocarboxylic acid having a hydroxyl group, the sedimentation prevention property and the thermal stability are deteriorated.
- the compound used as the solvent (C) is at least one of a hydroxyl group, an ether group, an ester group, an amide group and a ketone group. It can be seen that if it has a species substituent, it exhibits good anti-settling property (C judgment or higher) and thermal stability.
- the content of the first solvent (C) is 5% by mass to 99% by mass, good sedimentation prevention property (C determination or higher) and heat. It can be seen that it shows stability. However, from the viewpoint of improving the thermal stability, the content of the first solvent (C) is preferably 10% by mass to 99% by mass.
- the content of the surfactant (E) is preferably 300 parts by mass or less with respect to 100 parts by mass of the diamide compound (A) and / or the hydrogenated castor oil (A'). .. Furthermore, from the comparison of these examples, from the viewpoint of enhancing the stability over time and the dripping prevention property of the coating material, the content of the surfactant (E) is the diamide compound (A) and / or the hydrogenated castor oil (A). ') It is more preferably 200 parts by mass or less with respect to 100 parts by mass.
- Example 21 and Example 86 comparison between Example 53 and Example 87, comparison between Example 54 and Example 88, comparison between Example 59 and Example 89, and Example 64 and Example 90.
- the viscosity according to the embodiment of the present invention is not only when the viscosity adjusting agent is added to the epoxy main agent side (evaluation formulation 1) but also when the viscosity adjusting agent is added to the amine main agent side (evaluation formulation 1b). It can be seen that by adding the adjusting agent, it has excellent settling prevention property, thermal stability and sagging prevention property.
- the main component of the viscosity-imparting component (X) is the polyamide compound (B), and a large amount of amine as a neutralizing base is used. It can be seen that the paint is inferior in sedimentation prevention, thermal stability, aging stability, and sagging prevention.
- the viscosity-adjusting agent has excellent sedimentation prevention and thermal stability not only when it is added to the amine main agent side but also when it is added to the epoxy main agent side, and is a water-based paint. It is possible to obtain a viscosity adjustment that can impart excellent temporal stability and sagging prevention.
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Abstract
Description
を含有し、前記粘性付与成分(X)の全体量を100質量部としたときに、前記ジアマイド化合物(A)と前記水素添加ひまし油(A’)の含有量の合計が60質量部以上であることを特徴とする、水性樹脂用粘性調整剤である。
本発明に係る粘性調整剤は、水性塗料組成物において水性樹脂とともに用いられる添加剤であって、ジアマイド化合物(A)および/または水素添加ひまし油(A’)を含む粘性付与成分(X)と、第1の溶剤(C)とを必須成分として含有する。これにより、本発明によれば、粘性調整剤中における中和用塩基の使用量を低減させることができるとともに、この粘性調整剤を含む水性塗料への粘性付与効果、擬塑性付与効果および水性塗料の熱安定性に優れ、かつ、これらの効果を酸性から塩基性の広い範囲のpHにおいて発揮することが可能となる。
本発明に係る粘性付与成分(X)は、粘性調整剤が添加された水性塗料組成物に粘性および擬塑性を付与するとともに、水性塗料組成物の熱安定性を高めるために添加される有効成分である。この粘性付与成分(X)としては、必須成分として、ジアマイド化合物(A)と水素添加ひまし油(A’)のうちの少なくともいずれか一方が含まれる。また、粘性付与成分(X)の任意成分として、ポリアミド化合物(B)が含まれる。すなわち、本発明に係る粘性調整剤に含まれる粘性付与成分(X)としては、(1)ジアマイド化合物(A)のみ、(2)水素添加ひまし油(A’)のみ、(3)ジアマイド化合物(A)と水素添加ひまし油(A’)の組み合わせ、(4)ジアマイド化合物(A)とポリアミド化合物(B)の組み合わせ、(5)水素添加ひまし油(A’)とポリアミド化合物(B)の組み合わせ、ジアマイド化合物(A)と水素添加ひまし油(A’)とポリアミド化合物(B)の組み合わせ、があり得る。なお、後述する実施例に示すように、熱安定性を向上させる観点からは、粘性付与成分(X)として少なくともジアマイド化合物(A)を含むことが好ましい。
本発明に係るジアマイド化合物(A)は、ジアミン成分(A1)とモノカルボン酸成分(A2)とを反応させることにより得られる脂肪酸ジアマイドである。
本発明に係るジアミン成分(A1)としては、例えば、エチレンジアミン(EDA)、プロピレンジアミン、テトラメチレンジアミン(TMDA)、ヘキサメチレンジアミン(HMDA)、オクタメチレンジアミン(OMDA)、ドデカメチレンジアミン(DMDA)などの脂肪族ジアミン、オルトキシリレンジアミン、メタキシリレンジアミン(MXDA)、パラキシリレンジアミン(PXDA)、ジアミノジフェニルメタン、ジアミノジフェニルエーテル、ジアミノジフェニルスルホン、メチレンビスクロロアニリンなどの芳香族ジアミン、ピペラジン、イソホロンジアミンなどの脂環式ジアミンなどが使用できる。
本発明に係るモノカルボン酸成分(A2)としては、少なくとも水酸基を有するモノカルボン酸が含まれていれば特に制限はされない。水酸基を有するモノカルボン酸としては、例えば、酢酸、プロピオン酸、酪酸、吉草酸、カプロン酸、エナント酸、カプリル酸、ペラルゴン酸、カプリン酸、ラウリン酸、ミリスチン酸、パルミチン酸、ステアリン酸、アラキジン酸、ベヘニン酸(ベヘン酸)などの飽和脂肪族モノカルボン酸の水素原子の一部が水酸基に置換された化合物、および、オレイン酸、リノール酸、リシノール酸、リノレン酸、エイコセン酸、エルシン酸、天然油脂より得られる混合脂肪酸(トール油脂肪酸、米ヌカ脂肪酸、大豆油脂肪酸、牛脂脂肪酸など)などの不飽和脂肪族モノカルボン酸の水素原子の一部が水酸基に置換された化合物が挙げられる。
水素添加ひまし油(A’)は、ひまし油に水素添加することで得られる、飽和脂肪酸のトリグリセリドであり、エチレンオキサイド(EO)鎖を有さない化合物である。水素添加ひまし油(A’)としては市販品を使用することができ、市販品の例としては、C-ワックス(小倉合成工業株式会社製)、カオーワックス85P(花王株式会社製)、ヒマシ硬化油(山桂産業株式会社製)などが挙げられる。
本発明に係る粘性付与成分(X)は、上述したジアマイド化合物(A)と水素添加ひまし油(A’)のうちの少なくともいずれか一方を必須成分として含んでいるが、これらに加え、任意成分としてポリアミド化合物(B)を含んでいてもよい。このポリアミド化合物(B)は、ジアミン成分(B1)と、当該ジアミン成分(B1)に対して過剰量のジカルボン酸成分(B2)とを反応させることにより得られるポリアミドである。
ジアミン成分(B1)としては、炭素数2~12のジアミンからなる群から選択される少なくとも1種のアミンが使用できる。上記ジアミンとしては、例えば、エチレンジアミン(EDA)、プロピレンジアミン、テトラメチレンジアミン(TMDA)、ヘキサメチレンジアミン(HMDA)、オクタメチレンジアミン(OMDA)、ドデカメチレンジアミン(DMDA)などの脂肪族ジアミン、キシリレンジアミン、ジアミノジフェニルエーテル、ジアミノジフェニルスルホンなどの芳香族ジアミン、ピペラジン、イソホロンジアミンなどの脂環式ジアミンが挙げられる。これらのジアミン成分(B1)として使用される各化合物は、それぞれ単独でまたは2種以上を混合して用いることができる。
ジカルボン酸成分(B2)としては、例えば、炭素数4~36のジカルボン酸から選択される少なくとも1種のカルボン酸が使用できる。上記ジカルボン酸としては、例えば、コハク酸、グルタル酸、アジピン酸、ピメリン酸、スベリン酸、アゼライン酸、セバシン酸、ドデカン二酸、マレイン酸、フマル酸、フタル酸、イソフタル酸、テレフタル酸、ダイマー酸などが挙げられる。ダイマー酸は、大豆油、トール油、亜麻仁油、綿実油などの植物油から得られる不飽和脂肪酸(例えば、炭素数18または22の不飽和脂肪酸)を重合(二量化)して得られる重合脂肪酸で、一般に、炭素数36などのダイマー酸が市販されている。市販のダイマー酸中には、ダイマー酸の他にモノマー酸やトリマー酸が含まれているが、ダイマー酸の含有量が多いものが好ましい。これらのジカルボン酸成分(B2)として使用される各化合物は、それぞれ単独でまたは2種以上を混合して用いることができる。
本発明に係るポリアミド化合物(B)の酸価は、30以上140以下であることが好ましい。ポリアミド化合物(B)の酸価を上記範囲内とすることにより、本発明に係る粘性調整剤による水性塗料への粘性付与効果および擬塑性付与効果、ならびに、水性塗料の熱安定性向上効果をさらに高めることができる。また、ポリアミド化合物(B)の酸価が30未満であると、ポリアミド化合物(B)の疎水性が高くなりすぎるため、水性塗料組成物中への分散が困難となる場合があり、酸価が140を超えると、当該ポリアミドの合成が困難となる場合がある。
本発明に係る粘性付与成分(X)において、粘性付与成分(X)の全体量を100質量部としたときに、ジアマイド化合物(A)と水素添加ヒマシ油(A’)の含有量の合計が60質量部以上であることが必要である。また、粘性付与成分(X)としてポリアミド化合物(B)を含む場合には、ポリアミド化合物(B)の含有量が40質量部以下であることが好ましい。言い換えると、粘性付与成分(X)中におけるジアマイド化合物(A)と水素添加ヒマシ油(A’)の含有量の合計Q(A+A’)と、ポリアミド化合物(B)の含有量Q(B)との比[Q(A+A’):Q(B)]は、60:40~100:0の範囲となる。
本発明に係る粘性調整剤中の粘性付与成分(X)の含有量は、1質量%以上30質量%以下である。粘性付与成分(X)の含有量が1質量%未満であると、粘性調整剤による水性塗料組成物への粘性付与効果および擬塑性付与効果が得られない恐れがある。一方、粘性付与成分(X)の含有量が30質量%を超えると、粘性付与成分(X)の水を主体とする媒体中での分散性が低下し、水性塗料組成物の沈降防止性および熱安定性が悪化する恐れがある。ダレ防止性を向上させる観点からは、粘性付与成分(X)の含有量が3.0質量%以上20.0質量%以下であることが好ましく、3.0質量%以上15.0質量%以下であることがより好ましい。
ここで、本発明に係る粘性調整剤においては、水を主体とする媒体中にポリアミド化合物(B)を分散させるため(すなわち、ポリアミド化合物(B)の親水化を助ける親水化助剤として)のアミンなどの中和用塩基の使用を禁止するものではない。しかし、上述したように、中和用塩基を用いる場合、防食塗料分野で使用される水性下塗りエポキシ塗料(主剤)中に、アミンを用いて中和されたポリアミドを含有する粘性調整剤を添加すると、主剤のエポキシ樹脂と中和に用いたアミンとが反応してゲル化する問題があることから、中和用塩基(G)の含有量は極力少ない方が好ましい。このような観点から、例えば、中和用塩基(G)の含有量は、粘性調整剤中に2質量%以下であることが好ましく、中和用塩基(G)を実質的に含まないことがより好ましい。
本発明に係る水性樹脂用粘性調整剤は、上述した粘性付与成分(X)に加え、必須成分として、第1の溶剤(C)を含有している。第1の溶剤(C)は、水を主体とする媒体中への粘性付与成分(X)の分散を容易にするために用いられる。また、粘性付与成分(X)を第1の溶剤(C)と混合し、混合物を熱処理することで、水性塗料組成物への粘性付与効果や擬塑性付与効果を発現させることができる。すなわち、第1の溶剤(C)は、粘性付与成分(X)による粘性付与効果や擬塑性付与効果の発現(粘性付与成分(X)の活性化)を助ける活性化助剤として用いられる。
本発明に係る粘性調整剤は、水性樹脂用であり、有効成分である粘性付与成分(X)などを、水を主体とする媒体中へ分散させることにより得られるものである。水(D)としては、例えば、イオン交換水を用いることができる。水(D)は、本発明に係る粘性調整剤の必須成分ではない(すなわち、水(D)は、粘性調整剤中に含まれていなくてもよい)が、上述した第1の溶剤(C)の含有量は、環境面および人体面への影響から極力少ない方が好ましく、水(D)を含有させることにより、溶剤(C)の含有量を低減することができる。ただし、水(D)の含有量が多すぎると、粘性調整剤中に粘性付与成分(X)および溶剤(C)を必要量含有させることができなくなる恐れがあるため、水(D)の含有量は、粘性調整剤の全質量に対して80質量%以下であることが好ましい。
本発明に係る粘性調整剤は、任意成分として、界面活性剤(E)を含有していてもよい。この界面活性剤(E)は、粘性付与成分(X)を親水化させ、水を主体とする媒体中への粘性付与成分(X)の分散を容易にするための親水化助剤として用いられる。界面活性剤(E)の例としては、ポリオキシエチレン硬化ひまし油、ポリオキシエチレンひまし油や、ポリオキシエチレンステアリルエーテル、ポリオキシエチレン2-エチルヘキシルエーテル、ポリオキシエチレンスチレン化フェニルエーテルなどのポリオキシエチレンアルキルエーテルや、モノイソステアリン酸ポリオキシエチレン硬化ひまし油、トリイソステアリン酸ポリオキシエチレン硬化ひまし油や、モノイソステアリン酸ポリオキシエチレングリセリルなどのポリオキシエチレングリセリン脂肪酸エステルや、モノステアリン酸ポリオキシエチレンソルビタンなどのポリオキシエチレンソルビタン脂肪族エステルや、ポリオキシエチレンオキシプロピレン共重合体などが挙げられる。
本発明に係る粘性調整剤は、任意成分として、第2の溶剤(F)を含有していてもよい。この第2の溶剤(F)は、水性塗料組成物中における粘性調整剤の分散性を向上させる役割を有する。第2の溶剤(F)としては、第1の溶剤(C)とは異なる溶剤であり、かつ、第1の溶剤(C)よりも相対的に極性が高い溶剤が用いられる。このような第2の溶剤(F)の例としては、アルコール、多価アルコール、グリコール、ジグリコール、トリグリコールなどを用いることができる。アルコールとしては、例えば、メタノール、エタノール、プロパノール、ブタノール、イソブタノール、イソプロパノール、ペンタノール、ヘキサノール、ヘプタノール、オクタノール、2-エチルヘキサノールなどのような脂肪族アルコールや、ベンジルアルコールなどの環状アルコールなどが挙げられる。多価アルコールとしては、例えば、エチレングリコール、プロピレングリコール、ブチレングリコール、ブタンジオール、ジエチレングリコール、グリセリン、ソルビトール、キシリトールなどが挙げられる。グリコールとしては、例えば、エチレングリコールモノメチルエーテル、エチレングリコールモノエチルエーテル、エチレングリコールモノイソプロピルエーテル、エチレングリコールモノブチルエーテル、エチレングリコールモノイソブチルエーテル、エチレングリコールモノヘキシルエーテル、2-エチルヘキシルグリコール、プロピレングリコールモノメチルエーテル、プロピレングリコールモノプロピルエーテル、プロピレングリコールモノブチルエーテル、フェニルグリコールなどが挙げられる。ジグリコールとしては、例えば、ジエチレングリコールモノメチルエーテル、ジエチレングリコールモノエチルエーテル、ジエチレングリコールモノブチルエーテル、ジプロピレングリコールモノメチルエーテル、ジプロピレングリコールモノブチルエーテルなどが挙げられる。トリグリコールとしては、例えば、トリエチレングリコールモノメチルエーテル、トリエチレングリコールモノブチルエーテルなどが挙げられる。
本発明の水性樹脂用粘性調整剤は、他の機能を付与する目的で助剤を含んでいてもよい。例えば、塗膜の光沢保持、顔料の分散性、水性塗料組成物の消泡性、流し面などの改善を目的として、各種助剤を加えてもよい。
上述した各成分を含有する粘性調整剤は、例えば、以下のようにして製造できる。まず、水(D)、または、必要に応じて第1の溶剤(C)または第2の溶剤(F)を水に混合した混合溶液を冷却し、冷水または冷却溶液(以下、「冷水など」と記載する。)を作製する。このとき、冷水などの温度は特に制限されないが、例えば、5~15℃程度とすればよい。一方、粘性付与成分(X)と第1の溶剤(C)(必要に応じて、さらに界面活性剤(E))を混合した混合溶解液を作製する。混合溶解液を作製する際の混合条件は特に制限されないが、各成分が溶解状態にあると混合効率が向上するため、通常、90~150℃の温度において混合する。粘性付与成分(X)としてポリアミド化合物(B)が含まれている場合には、混合溶解液に中和用塩基(G)を添加してポリアミド化合物(B)を中和する。
本発明に係る粘性調整剤が適する用途は、水性塗料に水性樹脂とともに添加される用途であれば特に制限されるものではないが、本発明に係る粘性調整剤は、例えば、アルミニウム顔料やマイカのようなパール顔料を用いる水性メタリック塗料、または防食顔料のように粒子系が大きく比重も大きな顔料を用いる水性防食塗料などに好適に使用できる。また、本発明に係る粘性調整剤は、上記以外の一般の着色顔料や体質顔料などを用いる水性塗料や、水性インキのような水性コーティング材などにも好適に使用できる。
本発明に係る水性塗料組成物は、水性樹脂と、顔料と、上述した水性樹脂用粘性調整剤とを必須成分として含有する。また、本発明の水性塗料組成物は、任意成分として、消泡剤、造膜助剤、pH調整剤などのその他の添加剤をさらに含有していてもよい。
本発明の水性樹脂用粘性調整剤は、水性塗料組成物中のバインダである水性樹脂の種類、顔料などの配合組成などにより異なるが、通常は、粘性付与成分(X)の含有量が水性塗料組成物の全固形分に対して0.1質量%以上1.0質量%以下となる量で含有される。粘性調整剤の含有量を上記範囲とすることにより、粘性調整剤の添加効果(水性塗料組成物への粘性付与効果および擬塑性付与効果、ならびに、水性塗料組成物の熱安定性向上効果)をさらに高めることができる。
本発明に係る水性塗料組成物にバインダとして含有される水性樹脂は、水を主体とした媒体に樹脂成分が分散されたものであり、樹脂成分としては、例えば、アクリル系樹脂、アクリルシリコーン樹脂、アルキド系樹脂、ポリエステル系樹脂、ウレタン系樹脂、エポキシ系樹脂、シリコーン樹脂、フッ素樹脂などが挙げられる。水性樹脂の形態としては、分散形態に応じて水溶性、コロイダルディスパーション、エマルションに分けられるが、いずれの形態も適応可能である。これらの樹脂は、例えば、加熱硬化型、紫外線硬化型、電子線硬化型、酸化硬化型、光カチオン硬化型、過酸化物硬化型、および触媒存在下または非存在下で化学反応を伴って硬化するものであってもよく、ガラス転移点が高い樹脂で、化学反応を伴わず、希釈媒体が揮発するだけで被膜となるものであってもよい。また、硬化剤としては、例えば、アミノ樹脂、メラミン樹脂、イソシアネート化合物、ブロックイソシアネート化合物およびエポキシ化合物などが挙げられる。
顔料としては、例えば、体質顔料、着色顔料およびメタリック顔料などが挙げられる。体質顔料としては、例えば、炭酸カルシウム(重質炭酸カルシウム(GCC)、沈降炭酸カルシウム(PCC)など)、硫酸バリウム、二酸化ケイ素、水酸化アルミニウム、タルク、マイカ、有機繊維、ガラス粉などを使用できる。着色顔料としては、例えば、二酸化チタン、カーボンブラック、黄鉛、カドミウムイエロー、オーカー、チタンイエロー、ジンクロメート、弁柄、アルミノケイ酸塩、キナクリドン系、フタロシアニン系、アントロキノン系、ジケトピロロピロール系、ベンズイミダゾロン系およびイソインドリノン系などを使用できる。メタリック顔料としては、例えば、アルミニウムフレーク、銅フレーク、雲母状酸化鉄、雲母、および雲母に金属酸化物を被覆した鱗片状粉末などを使用できる。
本発明の水性塗料組成物には、その特性や本発明の目的が損なわれない範囲で、他の物質、例えば、脱水剤(例えば、シランカップリング剤)、密着向上剤、界面活性剤、硬化触媒、造膜助剤、ドライヤー、汚染防止剤、増感剤、酸化防止剤、光安定剤、紫外線吸収剤、耐水化剤、防腐防カビ剤、消泡剤、レベリング剤、分散剤、難燃剤、帯電防止剤、剥離剤、消臭剤、pH調整剤、香料などの他の添加剤を含有することができる。
本発明の水性塗料組成物は、公知の水性塗料の製造方法に準じて製造できる。例えば、上述した粘性調整剤および顔料以外の成分をイオン交換水などの水を主体とする媒体中に攪拌しながら混合した後、必要に応じてpH調整し、クリヤー塗料を作製する。このクリヤー塗料に粘性調整剤および顔料を添加し、クリヤー塗料中に分散させることにより、水性塗料組成物を製造することができる。
本発明の水性塗料組成物は、アルミニウム顔料やマイカのようなパール顔料を用いる水性メタリック塗料、または防食顔料のように粒子系が大きく比重も大きな顔料を用いる水性防食塗料などに好適に使用できる。また、本発明の水性塗料組成物は、上記以外の一般の着色顔料や体質顔料などを用いる水性塗料や、水性インキのような水性コーティング材などとしても好適に使用できる。
以下に詳述するように、表1に記載のジアミン成分(A1)とモノカルボン酸(A2)とを表1に示す配合比(モル比)にて反応させることにより、合成例A-1~A-6のジアマイド化合物(A)を得た。
攪拌装置、温度調節器、分水器、および窒素導入管を備えた1リットルの4ツ口フラスコに、12-ヒドロキシステアリン酸 298.6部(0.96モル)を計量し、80℃にて加温溶解した。次に、ヘキサメチレンジアミン 55.8部(0.48モル)を4ツ口フラスコに徐々に加えた後、185℃で5時間脱水反応を行い、表1に記載の合成例A-1のジアマイド化合物(A)を得た。
ジアミン成分(A1)およびモノカルボン酸(A2)として表1に記載の成分を用い、これらを表1に記載の配合比にて反応させたこと以外は、合成例A-1と同様にして、合成例A-2~A-6のジアマイド化合物(A)を得た。
以下に詳述するように、表2に記載のジアミン成分(B1)とジカルボン酸(B2)とを表2に示す配合比(モル比)にて反応させることにより、合成例B-1~B-10のポリアミド化合物(B)を得た。
攪拌装置、温度調節器、分水器、および窒素導入管を備えた1リットルの4ツ口フラスコに、ダイマー酸(商品名「ハリダイマー250」:ハリマ化成株式会社製) 354部(0.60モル)とキシレン 53.1部(全カルボン酸の15%)を計量し、50℃に加温した。次に、ヘキサメチレンレンジアミン 34.9部(0.30モル)を4ツ口フラスコに徐々に加えた後、150℃で60分間攪拌した。攪拌後、さらに175℃まで緩やかに加温して150分間脱水反応を行い、表2に記載の合成例B-1のポリアミド化合物(B)を得た。
ジアミン成分(B1)およびジカルボン酸(B2)として表2に記載の成分を用い、これらを表2に記載の配合比にて反応させたこと以外は、合成例B-1と同様にして、合成例B-2~B-10のポリアミド化合物(B)を得た。
以下に詳述するように、表3~表6に記載の各成分を表3~表6に示す配合比(質量部)にて配合し、表3~表6に示す加温処理温度にて加温処理することにより、製造例S1~S83の水性樹脂用粘性調整剤を得た。また、表7に記載の各成分を表7に示す配合比(質量部)にて配合し、表7に示す加温処理温度にて加温処理することにより、比較製造例H1~H11の水性樹脂用粘性調整剤を得た。
攪拌装置、冷却管、および温度計を備えた500ミリリットルの4ツ口フラスコに、水(D)としてイオン交換水 96部と、第2の溶剤(F)としてエチレングリコール 10部とを計量したものを10℃に冷却し、冷水とした。一方、ジアマイド化合物(A)として合成例A-1のジアマイド 10部と、第1の溶剤(C)としてエチレングリコールモノブチルエーテル 76部とを混合した後に120℃に加熱し、混合溶解液とした。次に、この混合溶解液を撹拌中の上記の冷水中に徐々に加えた。続いて、界面活性剤(E)としてHLBが6.4のポリオキシエチレン硬化ひまし油(商品名「ブラウノン CW-10」、青木油脂株式会社製) 4部を、第1の溶剤(C)としてのエチレングリコールモノブチルエーテル 4部の50%溶液とし、この50%溶液を、混合溶解液を添加後の上記の冷水中に徐々に加えた。50%溶液を全て加え終わった後、得られた分散物を容器に移し、80℃の恒温槽にて24時間加温処理することにより、表3に示す製造例S1の粘性調整剤を得た。
粘性調整剤の成分として表3、または表6に記載の成分を用い、これらの成分を表3、または表6に記載の配合比にて加え、表3、または表6に示す加温処理温度にて加温処理したこと以外は、製造例S1と同様にして、製造例S2~S8、S71~S83の粘性調整剤を得た。
攪拌装置、冷却管、および温度計を備えた500ミリリットルの4ツ口フラスコに、水(D)としてイオン交換水 100部を計量したものを10℃に冷却し、冷水とした。一方、ジアマイド化合物(A)として合成例A-1のジアマイド 14部と、ポリアミド化合物(B)として、合成例B-1のポリアミド 6部と、界面活性剤(E)としてHLBが6.4のポリオキシエチレン硬化ひまし油(商品名「ブラウノン CW-10」、青木油脂株式会社製) 4部と、第1の溶剤(C)としてエチレングリコールモノブチルエーテル 74.8部とを混合した後に120℃に加熱し、混合溶解液とした。その後、中和用塩基(G)としてN,N’-ジメチルエタノールアミン 1.2部を混合溶解液に加えて混合した。次に、この混合溶解液を撹拌中の上記の冷水中に徐々に加えた。全て加え終わった後、得られた分散物を容器に移し、80℃の恒温槽にて24時間加温処理することにより、表3に示す製造例S9の粘性調整剤を得た。
粘性調整剤の成分として表3または表4に記載の成分を用い、これらの成分を表3または表4に記載の配合比にて加え、表3または表4に示す加温処理温度にて加温処理したこと以外は、製造例S9と同様にして、製造例S10~S19、S48~S51の粘性調整剤を得た。
攪拌装置、冷却管、および温度計を備えた500ミリリットルの4ツ口フラスコに、水(D)としてイオン交換水 40部と、第1の溶剤(C)としてエチレングリコールモノブチルエーテル 57.6部とを計量したものを10℃に冷却し、冷却水とした。一方、ジアマイド化合物(A)として合成例A-1のジアマイド 6部と、第1の溶剤(C)としてエチレングリコールモノブチルエーテル 91.6部とを混合した後に120℃に加熱し、混合溶解液とした。次に、この混合溶解液を撹拌中の上記の冷水中に徐々に加えた。続いて、界面活性剤(E)としてHLBが6.4のポリオキシエチレン硬化ひまし油(商品名「ブラウノン CW-10」、青木油脂株式会社製) 2.4部を、第1の溶剤(C)としてのエチレングリコールモノブチルエーテル 2.4部の50%溶液とし、この50%溶液を、混合溶解液を添加後の上記の冷水中に徐々に加えた。全て加え終わった後、得られた分散物を容器に移し、75℃の恒温槽にて24時間加温処理することにより、表3に示す製造例S20の粘性調整剤を得た。
粘性調整剤の成分として表3に記載の成分を用い、これらの成分を表3に記載の配合比にて加え、表3に示す加温処理温度にて加温処理したこと以外は、製造例S20と同様にして、製造例S21~S23の粘性調整剤を得た。
攪拌装置、冷却管、および温度計を備えた500ミリリットルの4ツ口フラスコに、第1の溶剤(C)として2-エチルヘキサノール 100部を計量したものを10℃に冷却し、冷溶剤とした。一方、ジアマイド化合物(A)として合成例A-1のジアマイド 10部と、第1の溶剤(C)として2-エチルヘキサノール 90部とを混合した後に120℃に加熱し、混合溶解液とした。次に、この混合溶解液を撹拌中の上記の冷溶剤中に徐々に加えた。全て加え終わった後、得られた分散物を容器に移し、85℃の恒温槽にて24時間加温処理することにより、表4に示す製造例S24の粘性調整剤を得た。
粘性調整剤の成分として表4に記載の成分を用い、これらの成分を表4に記載の配合比にて加え、表4に示す加温処理温度にて加温処理したこと以外は、製造例S24と同様にして、製造例S25~S39の粘性調整剤を得た。
攪拌装置、冷却管、および温度計を備えた500ミリリットルの4ツ口フラスコに、水(D)としてイオン交換水 100部を計量したものを10℃に冷却し、冷却水とした。一方、ジアマイド化合物(A)として合成例A-1のジアマイド 10部と、第1の溶剤(C)としてジプロピレングリコールモノブチルエーテル 90部とを混合した後に120℃に加熱し、混合溶解液とした。次に、この混合溶解液を撹拌中の上記の冷水中に徐々に加えた。加え終わった後、得られた分散物を容器に移し、80℃の恒温槽にて24時間加温処理することにより、表4に示す製造例S40の粘性調整剤を得た。
粘性調整剤の成分として表4に記載の成分を用い、これらの成分を表4に記載の配合比にて加え、表4に示す加温処理温度にて加温処理したこと以外は、製造例S40と同様にして、製造例S41~S47の粘性調整剤を得た。
攪拌装置、冷却管、および温度計を備えた500ミリリットルの4ツ口フラスコに、水(D)としてイオン交換水 96部を計量したものを10℃に冷却し、冷却水とした。一方、ジアマイド化合物(A)として合成例A-1のジアマイド 10部と、第1の溶剤(C)としてエチレングリコールモノブチルエーテル 86部とを混合した後に120℃に加熱し、混合溶解液とした。次に、この混合溶解液を撹拌中の上記の冷水中に徐々に加えた。続いて、界面活性剤(E)としてHLBが6.4のポリオキシエチレンひまし油(商品名「ブラウノン BR-410」、青木油脂株式会社製) 4部を、第1の溶剤(C)としてのエチレングリコールモノブチルエーテル 4部の50%溶液とし、この50%溶液を、混合溶解液を添加後の上記の冷水中に徐々に加えた。全て加え終わった後、得られた分散物を容器に移し、80℃の恒温槽にて24時間加温処理することにより、表5に示す製造例S52の粘性調整剤を得た。
粘性調整剤の成分として表5に記載の成分を用い、これらの成分を表5に記載の配合比にて加え、表5に示す加温処理温度にて加温処理したこと以外は、製造例S52と同様にして、製造例S53~S70の粘性調整剤を得た。
表7に示す比較製造例H1の粘性調整剤として、市販のウレタンシックナー(商品名「ACRYSOLTM RM-2020」、Dow Chemical社製) を用いた。
攪拌装置、冷却管、および温度計を備えた500ミリリットルの4ツ口フラスコに、水(D)としてイオン交換水 156.6部を計量したものを40℃に加温し、温水とした。一方、ポリアミド化合物(B)として合成例B-3のポリアミド 21.0部と、ジアマイド化合物(A)として合成例A-1のジアマイド 2.0部と、水素添加ひまし油 7.0部と、第1の溶剤(C)としてプロピレングリコールモノメチルエーテル10.6部とを混合した後に120℃に加熱し、混合溶解液とした。その後、中和用塩基(G)としてN,N’-ジメチルエタノールアミン 2.8部を混合溶解液に加えて混合した。次に、この混合溶解液を撹拌中の上記の温水中に徐々に加えた。全て加え終わった後、分散を完全にするためにさらに40~50℃の温度範囲で10分間攪拌を続け、分散物を得た。撹拌終了後、得られた分散物を容器に移し、75℃の恒温槽にて20時間加温処理することにより、表7に示す比較製造例H2の粘性調整剤を得た。
粘性調整剤の成分として表7に記載の成分を用い、これらの成分を表7に記載の配合比にて加え、表7に示す加温処理温度にて加温処理したこと以外は、比較製造例H2と同様にして、比較製造例H3、H4の粘性調整剤を得た。
合成例A-1のジアマイドを粉砕機で微粒子化させることにより、平均粒子径10μmの微粒子化したジアマイド化合物を得た。加温処理用密閉容器に、酢酸ブチル(BAC) 126.0部と、専売アルコールを主剤としたアルコール性混合溶剤 54部と、微粒子化した合成例A-1のジアマイド 20部とを加え、20~25℃の温度で十分に分散させることによって、懸濁液を得た。この懸濁液の入った密閉容器を、あらかじめ65℃に設定した恒温槽内に48時間静置し、その後室温で静置することにより冷却し、表7に示す比較製造例H5の粘性調整剤を得た。
攪拌装置、冷却管、および温度計を備えた500ミリリットルの4ツ口フラスコに、水(D)としてイオン交換水 96部と、第2の溶剤(F)としてエチレングリコール 10部とを計量したものを10℃に冷却し、冷却水とした。一方、ジアマイド化合物(A)として合成例A-4のジアマイド 10部と、第1の溶剤(C)としてエチレングリコールモノブチルエーテル 76部とを混合した後に120℃に加熱し、混合溶解液とした。次に、この混合溶解液を撹拌中の上記の冷水中に徐々に加えた。続いて、界面活性剤(E)としてHLBが6.4のポリオキシエチレン硬化ひまし油(商品名「ブラウノン CW-10」、青木油脂株式会社製) 4部を、エチレングリコールモノブチルエーテル 4部の50%溶液とし、この50%溶液を、混合溶解液を添加後の上記の冷水中に徐々に加えた。全て加え終わった後、得られた分散物を容器に移し、80℃の恒温槽にて24時間加温処理することにより、表7に示す比較製造例H6の粘性調整剤を得た。
粘性調整剤の成分として表7に記載の成分を用い、これらの成分を表7に記載の配合比にて加え、表7に示す加温処理温度にて加温処理したこと以外は、比較製造例H6と同様にして、比較製造例H7、H8の粘性調整剤を得た。
攪拌装置、冷却管、および温度計を備えた500ミリリットルの4ツ口フラスコに、水(D)としてイオン交換水 100部を計量したものを10℃に冷却し、冷却水とした。一方、ジアマイド化合物(A)として合成例A-1のジアマイド 10部と、ポリアミド化合物(B)として合成例B-1のポリアミド 10部と、界面活性剤(E)としてHLBが6.4のポリオキシエチレン硬化ひまし油(商品名「ブラウノン CW-10」、青木油脂株式会社製) 4部と、第1の溶剤(C)としてエチレングリコールモノブチルエーテル 74部とを混合した後に120℃に加熱し、混合溶解液とした。その後、中和用塩基(G)としてN,N’-ジメチルエタノールアミン 2.0部を混合溶解液に加えて混合した。次に、この混合溶解液を撹拌中の上記の冷水中に徐々に加えた。全て加え終わった後、得られた分散物を容器に移し、80℃の恒温槽にて24時間加温処理することにより、表7に示す比較製造例H9の粘性調整剤を得た。
粘性調整剤の成分として表7に記載の成分を用い、これらの成分を表7に記載の配合比にて加え、表7に示す加温処理温度にて加温処理したこと以外は、比較製造例H9と同様にして、比較製造例H10、H11の粘性調整剤を得た。
上述したようにして得られた製造例S1~S83の粘性調整剤を用い、表12~表16に示す粘性調整剤の種類および塗料の評価配合にて実施例1~95の水性塗料組成物を製造した。また、上述したようにして得られた比較製造例H1~H11の粘性調整剤を用い、表17に示す粘性調整剤の種類および塗料の評価配合にて比較例1~21の水性塗料組成物を製造した。さらに、上述したようにして得られた比較製造例H2~H4の粘性調整剤を用い、参考例1~3の水性塗料組成物を製造した。なお、後述する試験例1~4において、それぞれ、粘性調整剤を含有しない水性塗料組成物(blank 1、blank 1b、blank 2、blank 3)も製造した(表17および表18を参照)。
上述したようにして得られた実施例1~95、比較例1~21および参考例1~3の水性塗料組成物について、以下のようにして各種の性能試験(試験例1~4)を行った。なお、性能試験の方法については、水性塗料組成物の塗料の評価配合(評価に用いた塗料の配合組成)ごとに分類して以下に詳述する。また、以下の試験例1および2において、水性2液型エポキシ塗料の「主剤」とは、主剤を硬化させる前の2種の液剤のうち、顔料が含まれている方の液剤を意味し、「硬化剤」とは、顔料が含まれていない方の薬剤を意味する。
試験例1では、評価配合として、表19に示した水性2液型エポキシ塗料配合(評価配合1)を用いて、粘性調整剤の性能試験を行った。
上述のようにして作製した水性塗料組成物(硬化剤混合前)を50mLのガラス瓶に移し、25℃および60℃の恒温槽中に7日間静置し、スパチュラを使用して塗料(硬化剤混合前)中の顔料ケーキングの程度を、blank(粘性調整剤を含有しないエポキシ主剤)のケーキングの程度と比較することにより、以下の基準で沈降防止性を評価した。
(評価基準)
A:顔料が良好に分散されている(blankと同等)
B:僅かにクリヤー層が分離(再撹拌により再分散され、作製時の状態に戻る)
C:ソフトケーキングが発生(再撹拌により再分散され、作製時の状態に戻る)
D:状態変化またはケーキングが発生(再撹拌しても作製時の状態に戻らない)
D:顔料が不均一に存在または分離
(評価基準)
A:25℃と60℃で沈降防止性の評価が同じ
(ともにA判定、ともにB判定、ともにC判定)
B:25℃と60℃で沈降防止性の評価に1段階の差がある
(A判定とB判定、B判定とC判定、C判定とD判定)
C:25℃と60℃で沈降防止性の評価に2段階の差がある
(A判定とC判定、B判定とD判定)
D:25℃と60℃で沈降防止性の評価に3段階の差がある
(A判定とD判定)
D:判定不能
(25℃の沈降防止性と60℃の沈降防止性の評価がともにD判定)
上述のようにして水性塗料組成物(硬化剤混合前)を作製した当日に、B型粘度計を使用して25℃にて60rpmでの粘度(mPa・s)と6rpmでの粘度(mPa・s)を測定し、T.I.値(6rpmでの粘度/60rpmでの粘度)を算出した。また、上記水性塗料組成物(硬化剤混合前)を作製後、25℃恒温槽中に4週間静置し、作製した翌日および作製から1週間毎に、B型粘度計を使用して25℃にて60rpmでの粘度(mPa・s)と6rpmでの粘度(mPa・s)を測定し、T.I.値(6rpmでの粘度/60rpmでの粘度)を算出した。さらに、以下の式により算出される粘度変化率の値により、以下の基準で塗料の経時安定性を評価した。なお、比較例5については、目視により塗料中の分散不良物を確認し、かつ、塗料が不均一であったことから、エポキシ主剤を作製した翌日に経時安定性の評価を中止した。
粘度変化率=(作製から4週間後の60rpmでの粘度/作製当日の60rpmでの粘度)×100
(評価基準)
A:粘度変化率が168%未満(blankと同等)
B:粘度変化率が168%以上190%未満
C:粘度変化率が190%以上220%未満
D:粘度変化率が220%以上
表19に示すように、上述のようにして作製した水性塗料組成物(硬化剤混合前) 100.00部と、アミン硬化剤としてjER WD11M60(三菱ケミカル社製) 23.50部とを混合し、水性塗料組成物(水性エポキシ塗料)を作製した。主剤と硬化剤との混合後、B型粘度計を用いて測定した粘度が20P(25℃)となるように、混合物をイオン交換水にて希釈し、サグテスターを使用してダレ防止性を測定した。この測定値に基づき、以下の基準でダレ防止性を評価した。なお、比較例5については、目視により塗料中の分散不良物を確認し、かつ、塗料が不均一であったことから、ダレ防止性の評価を実施していない。
(評価基準)
A:測定値が450μm以上
B:測定値が400μm以上450μm未満
C:測定値が300μm超400μm未満
D:測定値が300μm以下(blank相当)
試験例2では、評価配合として、表20に示した水性2液型エポキシ塗料配合(評価配合1b)を用いて、粘性調整剤の性能試験を行った。
上述のようにして作製した水性塗料組成物(硬化剤混合前)を50mLのガラス瓶に移し、25℃および60℃の恒温槽中に7日間静置し、塗料全量の体積に対する沈降した顔料(イリオジン)の体積の百分率(以下、「沈降率」と記載する。)を測定した。この測定値に基づき、以下の基準で沈降防止性を評価した。
(評価基準)
A:沈降率が80%以上
B:沈降率が50%以上80%未満
C:沈降率が25%以上50%未満
D:沈降率が25%未満
(評価基準)
A:25℃と60℃で沈降防止性の評価が同じ
(ともにA判定、ともにB判定、ともにC判定)
B:25℃と60℃で沈降防止性の評価に1段階の差がある
(A判定とB判定、B判定とC判定、C判定とD判定)
C:25℃と60℃で沈降防止性の評価に2段階の差がある
(A判定とC判定、B判定とD判定)
D:25℃と60℃で沈降防止性の評価に3段階の差がある
(A判定とD判定)
D:判定不能
(25℃の沈降防止性と60℃の沈降防止性の評価がともにD判定)
表20に示すように、上述のようにして作製した水性塗料組成物(硬化剤混合前) 75.60部と、上述のようにして作製したエポキシ硬化剤 47.90部とを混合し、水性塗料組成物(水性エポキシ塗料)を作製した。主剤と硬化剤との混合後、B型粘度計を用いて測定した粘度が20P(25℃)となるように、混合物をイオン交換水にて希釈し、サグテスターを使用してダレ防止性を測定した。この測定値に基づき、以下の基準でダレ防止性を評価した。
(評価基準)
A:測定値が450μm以上
B:測定値が400μm以上450μm未満
C:測定値が300μm超400μm未満
D:測定値が300μm以下(blank相当)
試験例3では、評価配合として、表21に示したアクリルエマルション塗料配合(評価配合2)を用いて、粘性調整剤の性能試験を行った。
上述のようにして作製した水性塗料組成物(アクリルエマルション塗料)を、フォードカップ♯4を用いて測定した粘度が27秒(25℃)となるようにイオン交換水にて希釈し、希釈された塗料を50mLのガラス瓶に移した。その後、25℃および60℃恒温槽中に7日間静置し、塗料全量の体積に対する沈降した顔料(イリオジン)の体積の百分率(以下、「沈降率」と記載する。)を測定した。この測定値に基づき、以下の基準で沈降防止性を評価した。
(評価基準)
A:沈降率が80%以上
B:沈降率が50%以上80%未満
C:沈降率が25%以上50%未満
D:沈降率が25%未満
D:塗料に曳糸性が現れた
D:塗料がゲル化した
(評価基準)
A:25℃と60℃で沈降防止性の評価が同じ
(ともにA判定、ともにB判定、ともにC判定)
B:25℃と60℃で沈降防止性の評価に1段階の差がある
(A判定とB判定、B判定とC判定、C判定とD判定)
C:25℃と60℃で沈降防止性の評価に2段階の差がある
(A判定とC判定、B判定とD判定)
D:25℃と60℃で沈降防止性の評価に3段階の差がある
(A判定とD判定)
D:判定不能
(25℃の沈降防止性と60℃の沈降防止性の評価がともにD判定)
試験例4では、評価配合として、表22に示したアクリルメラミン水溶性塗料配合(評価配合3)を用いて、粘性調整剤の性能試験を行った。
上述のようにして作製した水性塗料組成物(アクリルメラミン水溶性塗料)を、B型粘度計を用いて測定した粘度が350mPa・s(25℃)となるようにイオン交換水にて希釈し、希釈された塗料を50mlのガラス瓶に移した。その後、25℃および60℃恒温槽中に7日間静置し、顔料(イリオジン)の沈降率を測定した。この測定値に基づき、以下の基準で沈降防止性を評価した。
(評価基準)
A:沈降率が80%以上
B:沈降率が50%以上80%未満
C:沈降率が25%以上50%未満
D:沈降率が25%未満
D:塗料に曳糸性が現れた
(評価基準)
A:25℃と60℃で沈降防止性の評価が同じ
(ともにA判定、ともにB判定、ともにC判定)
B:25℃と60℃で沈降防止性の評価に1段階の差がある
(A判定とB判定、B判定とC判定、C判定とD判定)
C:25℃と60℃で沈降防止性の評価に2段階の差がある
(A判定とC判定、B判定とD判定)
D:25℃と60℃で沈降防止性の評価に3段階の差がある
(A判定とD判定)
D:判定不能(25℃の沈降防止性と60℃の沈降防止性の評価がともにD判定)
上述したようにして製造した実施例1~95および比較例1~21の水性塗料組成物に使用した粘性調整剤の種類および評価配合の種別、ならびに、これらの水性塗料組成物に関する評価結果(沈降防止性、熱安定性、塗料経時安定性、ダレ防止性)を上記表12~18に示した。
Claims (15)
- 炭素数2~12のジアミンからなる群より選択されるジアミン成分(A1)と、少なくとも水酸基を有するモノカルボン酸からなる群より選択されるモノカルボン酸成分(A2)とを反応させることにより得られるジアマイド化合物(A)、および/または水素添加ひまし油(A’)を含む粘性付与成分(X)を1質量%~30質量%と、
水酸基、エーテル基、エステル基、アミド基およびケトン基からなる群より選択された少なくとも1種の置換基を有する第1の溶剤(C)を5質量%~99質量%と、
を含有し、
前記粘性付与成分(X)の全体量を100質量部としたときに、前記ジアマイド化合物(A)と前記水素添加ひまし油(A’)の含有量の合計が60質量部以上であることを特徴とする、水性樹脂用粘性調整剤。 - 前記粘性付与成分(X)が、ジアミン成分(B1)と、当該ジアミン成分(B1)に対して過剰量のジカルボン酸成分(B2)とを反応させることにより得られるポリアミド化合物(B)をさらに含有し、
前記ポリアミド化合物(B)の酸価が30~140であり、
前記粘性付与成分(X)の全体量を100質量部としたときに、前記ポリアミド化合物(B)の含有量が40質量部以下であることを特徴とする、請求項1に記載の水性樹脂用粘性調整剤。 - 前記第1の溶剤(C)が、デービス法により算出されたHLB値が3~10の溶剤であることを特徴とする、請求項1または2に記載の水性樹脂用粘性調整剤。
- 前記第1の溶剤(C)が、アルコール系溶剤、グリコール系溶剤、ジグリコール系溶剤、トリグリコール系溶剤、エステル系溶剤およびアミド系溶剤からなる群より選択される少なくとも1種の溶剤であることを特徴とする、請求項1または2に記載の水性樹脂用粘性調整剤。
- グリフィン法により算出されたHLB値が3~18.5のノニオン性界面活性剤(E)をさらに含有し、
前記界面活性剤(E)の含有量が、ジアマイド化合物(A)および/または水素添加ひまし油(A’)100質量部に対して300質量部以下であることを特徴とする、請求項1~4のいずれか一項に記載の水性樹脂用粘性調整剤。 - 前記第1の溶剤(C)よりも相対的に極性が高い第2の溶剤(F)をさらに含有し、
前記第2の溶剤(F)の含有量が20質量%以下であることを特徴とする、請求項1~5のいずれか一項に記載の水性樹脂用粘性調整剤。 - 水(D)をさらに含有し、
前記水(D)の含有量が80質量%以下であることを特徴とする請求項1~6のいずれか一項に記載の水性樹脂用粘性調整剤。 - 水性樹脂と、顔料と、水性樹脂用粘性調整剤とを含有する水性塗料組成物であって、
前記水性樹脂用粘性調整剤は、
炭素数2~12のジアミンからなる群より選択されるジアミン成分(A1)と、少なくとも水酸基を有するモノカルボン酸からなる群より選択されるモノカルボン酸成分(A2)とを反応させることにより得られるジアマイド化合物(A)、および/または水素添加ひまし油(A’)を含む粘性付与成分(X)を1質量%~30質量%と、
水酸基、エーテル基、エステル基、アミド基およびケトン基からなる群より選択された少なくとも1種の置換基を有する第1の溶剤(C)を5~99質量%と、
を含有し、
前記粘性付与成分(X)の全体量を100質量部としたときに、前記ジアマイド化合物(A)と前記水素添加ひまし油(A’)の含有量の合計が60質量部以上であることを特徴とする、水性塗料組成物。 - 前記粘性付与成分(X)が、ジアミン成分(B1)と、当該ジアミン成分(B1)に対して過剰量のジカルボン酸成分(B2)とを反応させることにより得られるポリアミド化合物(B)をさらに含有し、
前記ポリアミド化合物(B)の酸価が30~140であり、
前記粘性付与成分(X)の全体量を100質量部としたときに、前記ポリアミド化合物(B)の含有量が40質量部以下であることを特徴とする、請求項8に記載の水性塗料組成物。 - 前記第1の溶剤(C)が、デービス法により算出されたHLB値が3~10の溶剤であることを特徴とする、請求項8または9に記載の水性塗料組成物。
- 前記第1の溶剤(C)が、アルコール系溶剤、グリコール系溶剤、ジグリコール系溶剤、トリグリコール系溶剤、エステル系溶剤およびアミド系溶剤からなる群より選択される少なくとも1種の溶剤であることを特徴とする、請求項8または9に記載の水性塗料組成物。
- グリフィン法により算出されたHLB値が3~18.5のノニオン性界面活性剤(E)をさらに含有し、
前記界面活性剤(E)の含有量が、ジアマイド化合物(A)および/または水素添加ひまし油(A’)100質量部に対して300質量部以下であることを特徴とする、請求項8~11のいずれか一項に記載の水性塗料組成物。 - 前記第1の溶剤(C)よりも相対的に極性が高い第2の溶剤(F)をさらに含有し、
前記第2の溶剤(F)の含有量が20質量%以下であることを特徴とする、請求項8~12のいずれか一項に記載の水性塗料組成物。 - 水(D)をさらに含有し、
前記水(D)の含有量が80質量%以下であることを特徴とする請求項8~13のいずれか一項に記載の水性塗料組成物。 - 前記水性樹脂用粘性調整剤は、前記粘性付与成分(X)の含有量が前記水性塗料組成物の全固形分に対して0.1質量%~1.0質量%となる量で含有されることを特徴とする、請求項8~14のいずれか一項に記載の水性塗料組成物。
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JP2002146336A (ja) * | 2000-11-15 | 2002-05-22 | Kusumoto Kasei Kk | アマイド系ペースト状チクソトロピック剤 |
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