WO2004074327A1 - 水性樹脂分散体の製造方法 - Google Patents
水性樹脂分散体の製造方法 Download PDFInfo
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- WO2004074327A1 WO2004074327A1 PCT/JP2004/001781 JP2004001781W WO2004074327A1 WO 2004074327 A1 WO2004074327 A1 WO 2004074327A1 JP 2004001781 W JP2004001781 W JP 2004001781W WO 2004074327 A1 WO2004074327 A1 WO 2004074327A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—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 a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/62—Monocarboxylic acids having ten or more carbon atoms; Derivatives thereof
- C08F220/64—Acids; Metal salts or ammonium salts thereof
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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
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
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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
- C09D157/00—Coating compositions based on unspecified polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
Definitions
- the present invention relates to a method for producing an aqueous resin dispersion capable of forming a coating film having excellent drying properties and a sticky gloss, an aqueous resin composition containing the aqueous resin dispersion, and an aqueous resin composition containing the aqueous resin dispersion.
- An aqueous coating composition comprising the aqueous resin composition.
- the vehicle used for the water-based coating composition includes, for example, resins such as an alkyd resin, an acrylic resin, a polyester resin, a polyurethane resin, and an epoxy resin.
- the alkyd resin can introduce an oxidatively curable group into the resin skeleton by using an unsaturated fatty acid as a raw material.
- Sho 50-126267, Sho 56-5863 and Sho 62-219469 disclose non-conjugated Unsaturated fatty acids having heavy bonds are reacted with glycidyl esters of ⁇ -ethylenically unsaturated acids, and unsaturated monomers such as a, -ethylenically unsaturated carboxylic acids are obtained.
- a method for producing a water-soluble or water-dispersed resin is disclosed by neutralizing a carboxyl group in the obtained resin with a basic substance and then diluting with water. I have. However, the hydrophilic resin produced by this method is produced due to passing through solution polymerization.
- Japanese Patent Application Laid-Open No. 59-87773 discloses that a surfactant and / or a polymer-protected colloid is used to combine a drying oil fatty acid or a semi-dry oil fatty acid with an ethylenically unsaturated acid glycidyl ester. It is disclosed that an oxidative polymerization type aqueous emulsion is produced by emulsion polymerization of a radically polymerizable monomer mixture containing a fatty acid-modified monomer obtained by reaction with a stell.
- the formation mechanism of emulsion polymer is based on the fact that monomers diffuse from water from large monomer droplets in the water phase, and polymerization proceeds in micelles formed by surfactants, and polymer particles (small particles being polymerized) are formed. It consists of generating.
- the monomer used for the polymerization must be supplied by diffusing water in the water from the monomer droplets to the polymer particles under the conditions for performing the polymerization.
- EP-A-1044493 discloses an aqueous copolymer containing a polymerization product of a bul monomer and a hydrophobic ester or a partial ester. And a method for producing the same have been proposed.
- This publication proposes to add a hydrophobic ester from a drying oil and a polyol to monomer droplets in order to suppress the formation of second-generation particles other than monomer droplets during polymerization.
- the water-based copolymer described in this publication forms a transparent film without a volatile coalescent, but has a low drying property, especially in the initial stage after application, and practically remains tacky in the coating film.
- the formation disclosure of weather resistance and water resistance of the coating film has drawbacks such as not enough Oh o 0 invention
- a main object of the present invention is to provide a method for stably producing an aqueous resin dispersion by emulsion-polymerizing a monomer mixture containing a fatty acid-modified polymerizable unsaturated monomer and another polymerizable unsaturated monomer copolymerizable. is there.
- the present inventors have conducted intensive studies to achieve the above object, and as a result, this time, a monomer mixture containing a fatty acid-modifying polymerizable monomer was finely dispersed so as to have a specific average particle size, and the obtained monomer was obtained.
- a monomer mixture containing a fatty acid-modifying polymerizable monomer was finely dispersed so as to have a specific average particle size, and the obtained monomer was obtained.
- the polymerization stability and storage stability are both good, and the water resistance, weather resistance, etc. are excellent. They have found that an aqueous resin composition that forms a coating film can be obtained, and have completed the present invention.
- a monomer mixture (I) containing (A) a fatty acid-modified polymerizable unsaturated monomer and (B) another polymerizable unsaturated monomer copolymerizable with the monomer (A) can be prepared using an aqueous medium
- the dispersion resin is finely dispersed so that the average particle diameter becomes 500 nm or less, and the obtained emulsion is polymerized or mini-emulsion polymerized.
- the average particle diameter of the dispersed resin is 500 nm or less.
- a method for producing the aqueous resin dispersion is
- the present invention also provides an aqueous resin composition comprising the aqueous resin dispersion and the aqueous resin composition.
- the present invention provides an aqueous coating composition comprising a fat composition.
- an aqueous resin dispersion containing a fatty acid-modified monomer unit without using a large amount of an organic solvent, an auxiliary surfactant, or the like.
- the aqueous resin composition and the aqueous coating composition containing the aqueous resin dispersion are excellent in storage stability, film forming property, etc., and can be easily cured even at room temperature while being a one-part type,
- the cured film formed has a remarkable effect of being excellent in transparency, gloss, finish (meat feeling), and excellent in water resistance, durability, corrosion resistance, weather resistance and the like.
- an aqueous coating composition containing the aqueous resin dispersion is suitable for use as a protective coating on a metal surface because it has good compatibility with metal surfaces such as iron and can suppress spots and the like.
- the method of the present invention comprises the steps of: preparing a monomer mixture (I) containing (A) a fatty acid-modified polymerizable unsaturated monomer and (B) another polymerizable unsaturated monomer copolymerizable with the monomer (A) in an aqueous medium.
- a monomer mixture (I) containing (A) a fatty acid-modified polymerizable unsaturated monomer and (B) another polymerizable unsaturated monomer copolymerizable with the monomer (A) in an aqueous medium.
- the ability to finely disperse so that the average particle size is 500 nm or less, and to polymerize the obtained monomer emulsion, or
- the average particle diameter of the monomer mixture particles in the emulsion exceeds 50 nm, sedimentation during storage of the monomer emulsion or the distribution of hydrophilic-hydrophobic composition of the obtained aqueous resin dispersion particles can be reduced. It is not preferable because the non-uniformity becomes extreme and may cause cloudiness of a coating film formed using the non-uniformity.
- the average particle size is determined by diluting a sample with deionized water
- aqueous medium used in the polymerization examples include water and a water-organic solvent mixed solution obtained by mixing water with an organic solvent such as a water-soluble organic solvent. be able to.
- the fatty acid-modified polymerizable unsaturated monomer (A) used in the method of the present invention facilitates the fine particle (or miemulsification) during the emulsification of the monomer mixture, and the monomer emulsification after the fine particle in the polymerization stage.
- the other polymerizable unsaturated monomer (B) into the aqueous medium and to finish the coating film formed using the aqueous resin dispersion particles to be produced. It is used to impart a sticky feeling to the properties and to introduce an oxidatively hardening group into the aqueous resin dispersion particles, and has a polymerizable unsaturated group at the terminal of a hydrocarbon chain derived from a fatty acid.
- examples of the polymerizable unsaturated group include a butyl group and a (meth) acryloyl group, and a (meth) acryloyl group is particularly preferable.
- a fatty acid-modified polymerizable unsaturated monomer (A) for example, a fatty acid (a 1) is reacted with an epoxy group-containing polymerizable unsaturated monomer (a 2) or a hydroxyl group-containing polymerizable unsaturated monomer (a 3). Can be mentioned.
- fatty acid (al) examples include those having a structure in which a lipoxyl group is bonded to the end of a hydrocarbon chain, and include, for example, drying oil fatty acids, semi-dry oil fatty acids, and non-drying oil fatty acids.
- Dry oil fatty acids and semi-dry oil fatty acids are not strictly distinguishable, but usually, dry oil fatty acids are unsaturated fatty acids with iodination of 130 or more, and semi-dry oil fatty acids are iodinated. It is an unsaturated fatty acid of 100 or more and less than 130.
- non-drying oil fatty acids are usually fatty acids having an iodine value of less than 100.
- drying oil fatty acids and semi-dry oil fatty acids include fish oil fatty acids, dehydrated castor oil fatty acids, safflower oil fatty acids, linseed oil fatty acids, soybean oil fatty acids, sesame oil fatty acids, poppy oil fatty acids, eno oil fatty acids, hemp oil fatty acids, and grapes. Kernel oil fatty acids, corn oil fatty acids, tall oil fatty acids, sunflower oil fatty acids, cottonseed oil fatty acids, tall oil oil fatty acids, rubber seed oil fatty acids, hygenic acid fatty acids, and the like.
- the non-drying oil fatty acids include, for example, coconut oil. Fatty acids, hydrogenated coconut oil fatty acids, palm oil fatty acids and the like. These can be used alone or in combination of two or more. Further In addition, these fatty acids can be used in combination with caproic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid and the like.
- the epoxy group-containing polymerizable unsaturated monomer (a2) that can be reacted with the fatty acid (al) to produce the fatty acid-modified polymerizable unsaturated monomer (A) includes one epoxy group and one epoxy group in one molecule.
- the fatty acid (a1) and the epoxy group-containing polymerizable unsaturated monomer (a2) have an equivalent ratio of 0 between the carboxyl group in the fatty acid (a1) and the epoxy group in the epoxy group-containing monomer (a2). 75::!
- the reaction can be carried out at a ratio such that the ratio is within a range of 1.1.25: 1, preferably 0.8: 1 to 1.2: 1.
- the reaction between the fatty acid (al) and the epoxy group-containing polymerizable unsaturated monomer (a2) is usually carried out in the presence of a polymerization inhibitor without causing a reaction problem such as gelation and the like.
- the reaction can be carried out under conditions that allow the carboxyl group and the epoxy group in the epoxy group-containing polymerizable unsaturated monomer to react smoothly, and usually at a temperature of about 100 to about 180 ° C and about 0.5 to about 180 ° C. Suitable by heating for about 10 hours.
- a tertiary amine such as N, N-dimethylaminoethanol, or an esteridation catalyst such as a quaternary ammonium salt such as tetraethylammonium bromide or tetrabutylammonium bromide may be used.
- an organic solvent inert to the reaction may be used.
- polymerization inhibitors examples include hydroxy compounds such as hydroquinone, hydroquinone monomethinole ether, pyrotechnolone, and p-tert-butylcatechol; nitrobenzene, nitrobenzoic acid, o—, m— or p-Jetrobenzene, Nitro compounds such as 2,4-jutrotomeleene, 2,4-dinitrophenol, trinitrobenzene, picric acid; p-benzoquinone, dichlorobenzene Quinone compounds such as nonone, chronoreanol, anthraquinone, and phenanthroquinone; and radical polymerization inhibitors known per se, such as ditroso compounds such as ditrosobenzene and nitroso] 3-naphthol. Alternatively, two or more kinds can be used in combination.
- hydroxy compounds such as hydroquinone, hydroquinone monomethinole ether, pyrotechnolone, and p-tert-
- the fatty acid-modified polymerizable monomer (A) can also be obtained by subjecting the fatty acid (a1) to an esterification reaction with the hydroxyl group-containing polymerizable unsaturated monomer (a3).
- a hydroxyl group-containing polymerizable unsaturated monomer (a3) include compounds having one hydroxyl group and one polymerizable unsaturated group in one molecule, and specifically, for example, 2-hydroxyxethyl ( meth) Atari rate, 2-hydroxycarboxylic propyl (meth) Atari rate, 3-hydroxypropyl (meth) Atari rate, c 2 to c 8 t Doroki of (meth) acrylic acid, such as heat mud Kishipuchiru (meth) Atari rate Shiarukiru (meth) Atari rate, ⁇ Lil alcohol, that having a hydroxyl group such as the c 2 to c 8 arsenide Dorokishi alkyl (meth) Atari rate ⁇ - force caprolactone-
- the fatty acid (a1) and the hydroxyl group-containing polymerizable unsaturated monomer (a3) usually have an equivalent ratio of the carboxyl group in the fatty acid (al) to the hydroxyl group in the hydroxyl group-containing monomer (a3) of 0.4. : 1 to 1.25: 1, preferably 0.5: 1 to 1.2: 1.
- the reaction between the fatty acid (al) and the hydroxyl group-containing polymerizable unsaturated monomer (a3) is usually carried out in the presence of a polymerization inhibitor without causing a reaction problem such as gelling.
- the reaction can be carried out under the condition that the carboxyl group in the component and the hydroxyl group in the hydroxyl group-containing polymerizable unsaturated monomer can react smoothly, and usually in the presence of an esterification catalyst, at about 100 to about 180 ° C. It is suitable to carry out by heating at a temperature of about 0.5 to about 10 hours.
- esterification catalyst examples include sulfuric acid, aluminum sulfate, potassium hydrogen sulfate, alkyl-substituted benzene, hydrochloric acid, methyl sulfate, phosphoric acid, and the like. These catalysts are usually used to react the above fatty acid (a1 ) And the hydroxyl group-containing polymerizable unsaturated monomer (a3), from about 0.001 to about 2. It can be used within the range of 0% by weight. Further, an organic solvent inert to the reaction can be used.
- polymerization inhibitor examples include hydroxy compounds such as hydroquinone, hydroquinone monomethyl enoate, pyrrole teconole, and p-tert-butylcatecone; nitrobenzene, nitrobenzoic acid, o—, m— or p-diene.
- -Nitro compounds such as trobenzene, 2,4-dinitroto / leene, 2,4-dinitrophenole, trinitrobenzene, and picric acid; Quinone compounds; radical polymerization inhibitors known per se such as ditroso compounds such as ditrosobenzene and etroso ⁇ -naphthol; and the like, and these can be used alone or in combination of two or more.
- the other polymerizable unsaturated monomer ( ⁇ ) used in the method of the present invention is a polymerizable unsaturated monomer copolymerizable with the fatty acid-modified polymerizable unsaturated monomer ( ⁇ ), and Compounds containing at least one, preferably one polymerizable unsaturated group, for example, a vinyl group, a (meth) acryloyl group and the like are included.
- Such other polymerizable unsaturated monomers (B) include, for example, methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, i-propyl (meth) Acrylate, n-butyl (meth) acrylate, i-butyl (meth) acrylate, tert-butyl (meth) acrylate, n-hexyl (meth) acrylate, octyl (meth) acrylate, Ethylhexyl (meth) acrylate, nonyl (meth) acrylate, tridecyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, isostearyl (meth) acrylate, cyclohexyl (meta) ) Phthalate, methylcyclohexyl (meth) acrylate,
- Examples thereof include polyvinyl compounds having a group, and these can be used alone or in combination of two or more depending on the performance desired for the resulting aqueous resin dispersion.
- the proportion of the monomer (A) and the monomer (B) used is not particularly limited and can be appropriately selected depending on the desired performance and application of the intended aqueous resin dispersion.
- the monomer (a) in general, based on the total weight of the monomer (a) ⁇ Pi monomer (B), the monomer (a) is 1-9 0 weight 0/0, preferably preferably 5 to 6 0 wt%, and et 1 0 to 40% by weight, and the monomer (B) should be within a range of 10 to 99% by weight, preferably 40 to 95% by weight, and more preferably 60 to 90% by weight. Can be. If the proportion of the monomer (A) used is less than 1% by weight, the oxidative curing of the film formed using the obtained aqueous resin dispersion may not proceed sufficiently, and the feeling of durability of the film may be impaired. There, on the other hand, when it exceeds 9 0 wt%, the cured coating film formed by using the obtained that the aqueous resin dispersion becomes brittle, weather resistance is insufficiently such Rukoto force s.
- the theoretical glass transition temperature of the (co) polymer of all the monomers (B) used is 0 to 100 ° C, preferably 10 to 80 ° C. It is more preferable that the temperature be in the range of 40 to 70 ° C.
- the glass transition temperature absolute temperature is a value calculated by the following equation.
- the glass transition temperature of the homopolymer of each monomer is a value according to the Polymer Hand Book (Second Edition, edited by J. Brandrup and EHImmergut), and the glass transition temperature of a monomer not described in the literature is the glass transition temperature of the monomer.
- a homopolymer was synthesized with a weight average molecular weight of about 50,000, and the glass The value obtained when the transfer temperature is measured by differential scanning thermal analysis is used.
- the film-forming property of the obtained aqueous resin dispersion and the aqueous resin dispersion formed from the aqueous resin dispersion can be formed.
- Ff can be compatible with the weather resistance of the coated film and the physical properties of the coated film such as ff water.
- the other polymerizable unsaturated monomer (B) is obtained by converting the carboxyl group-containing polymerizable unsaturated monomer (b1) to 0.1 to 5 based on the total weight of the monomer (A) and the monomer (B). %, Preferably not less than 0.5% by weight and less than 3% by weight.
- Examples of the carboxyl group-containing polymerizable unsaturated monomer (b 1) include (meth) acrylic acid, maleic acid, crotonic acid, ⁇ -carboxyethyl acrylate and the like, and particularly, acrylic acid and methacrylic acid. Acids and crotonic acid are preferred.
- the carboxyl group-containing polymerizable unsaturated monomer (bl) as at least a part of the other polymerizable unsaturated monomer ( ⁇ ), the stability of the resulting aqueous resin dispersion particles in an aqueous medium and the mechanical properties are improved. Stability can be ensured, and when an aqueous resin composition containing the same is applied to an enamel paint, the toning property of the paint can be improved.
- the other polymerizable unsaturated monomer (B) includes, as at least a part thereof, a polymerizable unsaturated monomer having a linear, branched or cyclic, saturated or unsaturated hydrocarbon group having 4 or more carbon atoms.
- the amount of the monomer (b 2) is 30 to 90% by weight, preferably 35 to 85% by weight, more preferably 45 to 8% by weight, based on the total weight of the monomer (A) and the monomer (B). Desirably, it is contained within the range of 0% by weight.
- Examples of the polymerizable unsaturated monomer (b 2) containing a hydrocarbon group having 4 or more carbon atoms include n-butyl (meth) acrylate, i-butyl (meth) atalylate, and tert-butyl (meth).
- the other polymerizable unsaturated monomer (B) is a polymerizable unsaturated monomer (b 3) containing, as at least a part thereof, a linear or branched hydrocarbon group having 6 or more carbon atoms. 1 to 30 weight, based on the total weight of monomer (A) and monomer (B). / 0 , preferably 5 to 20% by weight, more preferably 6 to 18% by weight.
- Examples of the polymerizable unsaturated monomer (b 3) containing a linear or branched hydrocarbon group having 6 or more carbon atoms include n-hexyl (meth) acrylate and octyl (meth) acrylate , 2-Ethylhexyl (meth) acrylate, nonyl (meth) acrylate, tridecyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, "isostearyl acrylate” (Osaka organic) And the like, and these can be used alone or in combination of two or more.
- a polymerizable unsaturated monomer (b 3) containing a linear or branched hydrocarbon group having 6 or more carbon atoms as at least a part of the other polymerizable unsaturated monomer (B)
- the other polymerizable unsaturated monomer (B) is finely granulated together with the fatty acid-modified polymerizable unsaturated monomer (A)
- the polymerization stability of the monomer emulsion can be maintained. It is possible to produce an aqueous resin dispersion which forms a coating film having excellent properties.
- the other polymerizable unsaturated monomer (B) includes a carboxyl group-containing polymerizable unsaturated monomer (b 1) and a hydrocarbon group having 4 or more carbon atoms.
- Polymerizable unsaturated monomer (b 2) and fatty acid Comprising a polymerizable unsaturated monomer (A), the above monomer (b1) and another polymerizable unsaturated monomer (b7) other than the monomer (b2), and a monomer mixture to be emulsion-polymerized ( I) the monomer (based on the total weight of a) and monomer (B), monomer (a) 5 to 50 wt%, preferably 10 to 40 wt%, more preferably 10 to 35 weight 0 / 0, the monomer (bl) a 0.1 to 5% by weight, preferably 0.5 to 4.5 wt 0/0, more preferably 0.5 to 3 wt%, 45 to 80 weight monomer (b 2) %, Preferably 50 to 75% by weight, more preferably 55 to 70% by weight.
- the polymerizable unsaturated monomer (b 2) containing a hydrocarbon group having 4 or more carbon atoms is a polymerizable unsaturated monomer containing a linear or branched hydrocarbon group having 6 or more carbon atoms.
- Monomer (b3) is present in an amount of 1 to 30% by weight, preferably 5 to 20% by weight, based on the total weight of monomer (A) and monomer (B). / 0 , more preferably in the range of 6 to 18% by weight.
- the proportion of the monomer (A) used when the proportion of the monomer (A) used is less than 5% by weight, the feeling of stickiness of a coating film formed using the obtained aqueous resin dispersion becomes insufficient, and conversely, 50% by weight. If it exceeds, the weather resistance of the formed coating film may be insufficient. If the amount of the monomer (bl) used is less than 0.1% by weight, the resulting aqueous resin dispersion may have insufficient stability of the particles, while if it exceeds 5% by weight, it may be formed. The water resistance of the coating may decrease. Further, when the use ratio of the monomer (b 2) is less than 45% by weight, the water resistance of the formed coating film may be reduced. On the other hand, when the use amount exceeds 80% by weight, the resulting aqueous resin dispersion particles Storage stability may decrease.
- an aqueous resin dispersion By copolymerizing the specific proportion of the fatty acid-modified polymerizable unsaturated monomer (A) and the other polymerizable unsaturated monomer (B), an aqueous resin dispersion can be produced stably, It is possible to produce an aqueous resin dispersion which forms a coating film having a transparent feeling and a sticky feeling and having excellent performance such as water resistance.
- the other polymerizable unsaturated monomer (B) desirably contains, as at least a part thereof, a cycloalkyl group-containing polymerizable unsaturated monomer (b4).
- a cycloalkyl group-containing polymerizable unsaturated monomer (b 4) a compound having one cycloalkyl group having 6 or more carbon atoms and one polymerizable unsaturated bond in one molecule is preferable.
- cyclohexyl (meth) acrylate methinorecyclohexyl (meth) acrylate, t-butylcyclohexyl (meth) acrylate, cyclododecyl (meth) acrylate, and the like can be used alone or 2 It can be used in combination of more than one species. Among them, cyclohexyl (meth) acrylate is preferred.
- the content is 1 to 70% by weight, preferably 10 to 60% by weight, more preferably 10 to 60% by weight, based on the total weight of the monomer (A) and the monomer (B). A range of 25-45% by weight is preferred.
- the other polymerizable unsaturated monomer (B) desirably contains, as at least a part thereof, an aromatic butyl monomer (b5).
- an aromatic butyl monomer (b5) for example, butyl aromatic compounds such as styrene, permethylstyrene, and burtonolene can be mentioned, and these can be used alone or in combination of two or more.
- an aromatic vinyl monomer (b5) By using such an aromatic vinyl monomer (b5), the copolymerizability of all the monomers can be improved, and the physical properties of the formed coating film such as water resistance can be improved.
- the aromatic butyl monomer (b5) is generally used in an amount of 1 to 50% by weight, preferably 5 to 45% by weight, more preferably 12 to 35% by weight, based on the total weight of the monomers (A) and (B). It is preferred to use within the range of weight%.
- other polymerizable unsaturated monomers include a cycloalkyl group-containing polymerizable unsaturated monomer (b4), an aromatic vinyl monomer (b5), and a monomer.
- (A), a monomer (b4) and a polymerizable unsaturated monomer (b8) other than the monomer (b5), and the monomer mixture (I) to be emulsion-polymerized comprises the monomer (A) and the monomer (A).
- Total weight of monomer (B) Based on the monomer (A) to 5 to 5 0 wt 0/0, preferably 1 0-4 0% by weight, more preferably 1 0-3 5 wt%, monomer (b 4) 1-7 0 wt%, preferred properly 1 0-6 0% by weight, more preferably 2 5-4 5 wt%, monomer (b 5) 1-5 0% by weight, preferably 5-4 5 weight 0/0, further preferably 1 2-3 5 by weight 0/0, and other polymerizable unsaturated monomer (b 8) 0 ⁇ 9 3% by weight, preferably 0-7 5% by weight, more preferably 0-4 7 wt %.
- the proportion of the monomer (A) used is less than 5% by weight, the feeling of stickiness of the coating film formed using the obtained water-soluble resin dispersion becomes insufficient, and conversely 50% by weight. If the amount exceeds the above range, the weather resistance of the formed coating film may be reduced. If the proportion of the monomer (b4) is less than 1% by weight, the weather resistance of the formed coating film is insufficient. On the contrary, if it exceeds 70% by weight, the polymerization stability may be insufficient. Further, when the use ratio of the monomer (b 5) is less than 1% by weight, the water resistance of the formed coating film may be reduced, and on the other hand, 50% by weight. If it exceeds / 0 , the weather resistance of the formed coating film may be insufficient.
- the other polymerizable unsaturated monomer (B) includes, as at least a part thereof, a carbonyl group-containing polymerizable unsaturated monomer (b6). It is desirable.
- Examples of the carbonyl group-containing polymerizable unsaturated monomer (b 6) include compounds having one carbonyl group and one polymerizable unsaturated bond in one molecule, and specifically include, for example, acrolein, diacetone Acrylamide, diacetone methacrylamide, acetoacetoxitytyl methacrylate, formyl styrene, and butyl alkyl ketone having 4 to 7 carbon atoms (eg, vinyl methyl ketone, vinylethyl ketone, butyl butyl ketone) and the like. These can be used alone or in combination of two or more. Among them, diacetone (meth) acrylamide is particularly preferable.
- a polymer containing a carbonyl group-containing polymerizable unsaturated monomer (b 6) is used as at least a part of the other polymerizable unsaturated monomer (B), and a hydrazine derivative described below is compounded in the obtained aqueous resin dispersion.
- a hydrazine derivative described below is compounded in the obtained aqueous resin dispersion.
- Such a polymerizable unsaturated monomer having a carbonyl group (b 6) is generally used in an amount of 0.5 to 35% by weight, preferably 2 to 35% by weight, based on the total weight of the monomers (A) and (B). It is suitable to use within the range of 20% by weight.
- the type of the fatty acid (a 1) is not particularly limited. It can also consist of semi-dry oil fatty acids and Z or non-dry oil fatty acids. Semi-dry oil fatty acids and Z or non-dry oil oil fatty acids are generally fatty acids having low acid-hardening property, and those exemplified above can be used.
- the proportion of the semi-drying oil fatty acid and / or the non-drying oil fatty acid and the polymerizable unsaturated monomer having a carboxyl group (b 6) is generally based on the total weight of the monomer (A) and the monomer (B).
- the semi-drying oil fatty acid and Z or the non-drying oil fatty acid are in the range of 5 to 50% by weight, preferably 10 to 40% by weight, and the carbonyl group-containing polymerizable unsaturated monomer (b6) is 0.5 to 50% by weight. It can be in the range of 35% by weight, preferably 2-20% by weight.
- the feeling of stickiness of the coating film formed from the obtained aqueous resin dispersion may be reduced.
- the water resistance of the formed coating film may be insufficient. If the amount of the polymerizable unsaturated monomer (b 6) containing the sulfonyl group is less than 0.5% by weight, the water resistance and weather resistance of the coating film formed will be insufficient, while if it exceeds 35% by weight, The formed coating film may become brittle.
- the hydrazine derivative described below can be used in combination to form a carbonyl group and a hydrazine derivative.
- the fatty acids (a l) Even when semi-drying oil fatty acid and Z or non-drying oil fatty acid are used as components, it has a sticky feeling, is excellent in weather resistance, water resistance, etc., and has a familiar coating film on iron base materials. Can be produced.
- polymerizable unsaturated monomers (B) are used in order to secure the stability of the finely divided monomer emulsion in the polymerization stage or the particles of the aqueous resin dispersion in the storage stage. It can also comprise atarilate.
- examples of the hydroxyl group-containing (meta) acrylate include those exemplified above.
- the proportion of the hydroxyl group is generally from 1 to 50 based on the total amount of the monomer (A) and the monomer (B). weight 0/0, preferably 1-3 0% by weight, more preferably from the child and in the range of 1 to 1 0% by weight.
- the monomer mixture (I) comprises, as essential components, the above-mentioned fatty acid-modified polymerizable unsaturated monomer (A) and another polymerizable unsaturated monomer copolymerizable with the monomer (A) — (B).
- the containing monomer mixture (I) may further comprise a compound substantially free of polymerizable unsaturated groups.
- the monomer mixture (I) a compound containing the above-mentioned compound having substantially no polymerizable unsaturated group, it is possible to produce aqueous resin dispersion particles containing the compound.
- Compounds that do not substantially contain polymerizable unsaturated groups include, for example, additives for paints such as UV absorbers, UV stabilizers and metal dryers; resins such as acrylic resins, polyester resins, polyurethane resins, and alkyd resins; Coloring agents such as pigments and dyes can be mentioned, and these can be used alone or in combination of two or more by appropriately selecting them. Particularly, UV absorbers, UV stabilizers and metal dryers are used. At least one selected is preferred.
- Examples of the ultraviolet absorber include salicylic acid derivatives such as phenyl salicylate, p-octylphenyl salicylate, and 4-t-butylphenyl salicylate; 2,4-dihydroxybenzophenone, and 2-hydroxy-4-methoxybeta.
- salicylic acid derivatives such as phenyl salicylate, p-octylphenyl salicylate, and 4-t-butylphenyl salicylate
- 2,4-dihydroxybenzophenone 2,4-dihydroxybenzophenone
- 2-hydroxy-4-methoxybeta 2-hydroxy-4-methoxybeta
- Nzophenone 2,2, -dihydroxy-14-methoxybenzophenone, 2-hydroxy-14-methoxy-1 2 'one-strength ⁇ oxybenzophenone, 2-hydroxy-14-methoxy-5 Snorrephobenzophenone trihydrate, 2,2 dihydro Xy 4,4'-dimethoxybenzophenone, 2-hydroxy-1-octoxybenzophenone, 2-hydroxy-4-octadecyloxybenzophenone, sodium 2,2'-dihydroxy-4,4'dimethoxy-5-snorrejo Benzophenone, 2,2 ', 4,4'-tetrahydroxybenzophenone, 4-dodecyloxy-2-hydroxybenzophenone, 5-chloro1-2-hydroxybenzophenone, Resonoresinol monobenzoate, 2,4-dibenzoinoleresorcinol, 4,6-dibenzoylresorcinol, hydroxydodecylbenzophenone, 2,2'-d
- UV stabilizers examples include 2- (3-t-butyl-5-methyl-12-hydroxyphenynole) -1-5-chlorobenzotriazonole and 2- (3,5-di-t-t-).
- the ultraviolet absorber and / or the ultraviolet stabilizer may be used alone, or may be appropriately selected and used in combination.
- the ultraviolet absorber and / or the ultraviolet stabilizer are 0.1 to 5.0% by weight, especially 0.2% by weight based on the total weight of the monomer (A) and the monomer (B).
- the UV stabilizer in the range of 0.1 ⁇ 5.0% by weight, especially in the range of 0.2 ⁇ 3.0% by weight It is preferred to use within.
- the monomer mixture (I) contains an ultraviolet absorber and Z or an ultraviolet stabilizer
- at least a part of the obtained aqueous resin dispersion particles contains the ultraviolet absorber and Z or an ultraviolet stabilizer.
- the ultraviolet absorber and Z or the ultraviolet stabilizer are uniformly dispersed in the film formed using the aqueous resin dispersion, and are eluted by rainwater or the like after the film is formed. And the effect will be stably exhibited over a long period of time.
- Examples of the metal dryer include salts of an acid with at least one metal selected from the group consisting of aluminum, calcium, cerium, cobalt, iron, lithium, magnesium, manganese, zinc, and zirconium.
- Examples of the acid include capric acid, caprylic acid, isodecanoic acid, linolenic acid, naphthenic acid, neodecanoic acid, octenoic acid, oleic acid, palmitic acid, resin acid, ricinoleic acid, soybean oil fatty acid, stearic acid, and stearic acid. Oil fatty acids and the like.
- the metal dryer when the metal dryer is included in the monomer mixture (I) before the polymerization, the oxidative curability of the cured film formed from the obtained aqueous resin dispersion can be improved. This is because the metal dryer is encapsulated in at least a part of the aqueous resin dispersion particles, and when the encapsulated particles are formed, the metal dryer effectively acts on the oxidatively curable polymerizable unsaturated group in the encapsulated particles. It is thought that this is possible.
- the amount of the metal dryer is preferably in the range of 0.5 to 10% by weight, particularly 1 to 7% by weight, based on the total weight of the monomer (A) and the monomer (B). Oh ⁇ .
- an emulsifier may be used in combination, if necessary.
- an anionic emulsifier and a nonionic emulsifier are preferable.
- the anionic emulsifier include sodium salts and ammonium salts of alkylsulfonic acid, alkylbenzenesulfonic acid, alkylphosphoric acid and the like.
- nonionic emulsifiers include, for example, polyoxyethylene oleyl ether, polyoxyethylene stearyl ether, polyoxyethylene lauryl ether, polyoxyethylene tridecyl ether, polyoxyethylene phenylene oleate ethereol, polyoxyethylene noninole phenyl enolate / Les, Polio Xylethyleneoctenolefenoleate, polyoxyethylene monolate, polyoxyethylene monostearate, polyoxyethylene monooleate, sorbitan monolaurate, sorbitan monostearate, sorbitan monostearate, sono Levitan triolate, polyoxyethylene sorbitan monolaurate and the like can be mentioned.
- a reactive anionic emulsifier having a polymerizable unsaturated group is also included.
- the emulsifier can be used in the range from 0.1 to 15% by weight, preferably in the range from 0.5 to 12% by weight, based on the total amount of all monomers used.
- the monomer mixture (I) may contain a chain transfer agent for the purpose of adjusting the molecular weight of the obtained aqueous resin dispersion.
- chain transfer agent examples include compounds having a mercapto group, and specifically, for example, lauryl mercaptan, t-dodecyl mercaptan, octyl mercaptan, 2-ethylhexyl thioglycolate, 2-methyl-1-methylglycol 5-tert-butylthiophenol, mercaptoethanol, thioglycerol, mercaptoacetic acid (thiodalicholate), mercaptopropionate, n-octyl-3-mercaptopropionate and the like.
- the amount of the chain transfer agent is preferably in the range of 0.05 to 10% by weight, particularly 0.1 to 5% by weight, based on the total amount of all monomers.
- the monomer mixture (I) may be blended with an organic solvent such as a long-chain saturated hydrocarbon solvent such as hexadecane, a long-chain alcohol-based solvent such as hexadenicol, etc., if necessary. .
- an organic solvent such as a long-chain saturated hydrocarbon solvent such as hexadecane, a long-chain alcohol-based solvent such as hexadenicol, etc., if necessary. .
- the monomer mixture (I) described above is finely dispersed in an aqueous medium to form a monomer emulsion.
- the concentration of the monomer mixture (I) in an aqueous medium is generally 10 from the viewpoint of the suitability of the formed monomer emulsion for fine particles, stability in the polymerization stage, and practicality when applied to an aqueous paint.
- the range is preferably from 70 to 70% by weight, more preferably from 20 to 60% by weight.
- Fine dispersion of the monomer mixture (I) in an aqueous medium can be usually performed using a disperser having high energy shearing ability. Examples of the disperser that can be used at that time include a high-pressure emulsifier, an ultrasonic emulsifier, a high-pressure colloid mill, and a high-pressure homogenizer.
- dispersers can usually be operated under high pressure, of the order of 10 to 100 OMPa, preferably of 50 to 30 OMPa.
- the monomer mixture may be preliminarily emulsified by a disperser or the like before dispersion by the machine.
- the average particle size of the dispersed particles in the monomer emulsion obtained by finely dispersing the monomer mixture (I) in an aqueous medium by the above method is determined from the viewpoint of transparency, water resistance and the like of the formed coating film. nm or less, preferably 80 to 400 nm, and more preferably 100 to 300 nm.
- the monomer emulsion after fine dispersion is charged in a reactor equipped with a stirrer, a polymerization initiator is added, and the mixture is heated with stirring. It can be done by doing.
- the polymerization initiator may be any of oil-soluble and water-soluble polymerization initiators.
- oil-soluble polymerization initiator include benzoyl peroxide, octayl peroxide, and lauroyl peroxide.
- organic peroxides such as stearoyl peroxide; azo compounds such as azobisisobutyronitrile and azobis (2,4-dimethylvaleronitrile).
- water-soluble initiator examples include: , Cumene hydride peroxide, tert-butyl peroxide, tert-butyl peroxy laperate, tert-butyl peroxy isopropyl ⁇ / carbonate, te 1-t-butyl peroxyacetate, diisopropynolene senhydro Organic peroxides such as peroxide; azobis (2-methylpropionitrile), azobis (2-Methylbutyronitrile), 4,4'-azobis (4-cyanobutanoic acid), dimethylazobis (2-methylpropionate), azobis [2-methyl-1- (2-hydroxyethyl) -propionamide Azo compounds such as azobis ⁇ 2-methyl-1- [2- (1-hydroxybutyl)] — propionamide ⁇ ; persulfates such as potassium persulfate, ammonium persulfate and sodium persulfate.
- persulfates such as potassium persulfate,
- a redox polymerization system may be used by using a reducing agent such as sugar, sodium formaldehyde sulfoxylate, or an iron complex in combination with the polymerization initiator.
- the amount of the polymerization initiator used is preferably in the range of 0.1 to 5% by weight, particularly preferably 0.2 to 3% by weight, based on the total weight of the monomers (A) and (B).
- the method of adding the polymerization initiator is not particularly limited, and can be appropriately selected according to the type and amount of ⁇ . For example, it may be contained in the monomer mixture (I) or the aqueous medium in advance, or may be added at once during polymerization or may be added dropwise.
- the aqueous resin dispersion may be neutralized with a neutralizing agent in order to improve the mechanical stability of the particles of the obtained aqueous resin dispersion.
- the neutralizing agent is not particularly limited as long as it can neutralize the acidic group. Examples thereof include sodium hydroxide, potassium hydroxide, trimethylamine, dimethylaminoethanol, 2-methyl-2-amino-1 Monopropanol, triethylamine, aqueous ammonia and the like. These neutralizing agents are desirably used in such an amount that the pH of the aqueous resin dispersion after neutralization is about 6.5 to 9.0. .
- an aqueous resin dispersion having an average particle size of the dispersion resin of 500 nm or less, particularly preferably in the range of 100 to 300 nm.
- the average particle size of the dispersed resin in the aqueous resin dispersion depends on the average particle size of the dispersed particles in the monomer emulsion before polymerization.
- the aqueous resin component with respect to the average particle diameter of the dispersed particles in the monomer emulsion is adjusted.
- the rate of change of the average particle diameter of the dispersed resin in the dispersion is generally 50 to 150%, preferably 60% or more and less than 100%, and more preferably 70 to 99%. be able to.
- the rate of change of the average particle size of the dispersed resin in the aqueous resin dispersion with respect to the average particle size of the dispersed particles in the monomer emulsion can be calculated based on the following equation.
- Average particle size of dispersed particles in monomer emulsion (nm) If the rate of change of the average particle diameter is within the above range, the polymerization can be stably performed, and the average particle diameter of the dispersion resin in the finally obtained aqueous resin dispersion falls within the above range (5). O Onm or less, especially 80 to 40011111, more preferably 100 to 300 nm), and it is possible to form a transparent cured film.
- the aqueous resin dispersion produced according to the method of the present invention generally has a weight average molecular weight in the range of 10,000 to 300,000, especially 30,000 to 200,000.
- the weight average molecular weight is a value obtained by using a tetrahydrofuran as a solvent and converting the weight average molecular weight measured by gel permeation chromatography based on the weight average molecular weight of polystyrene. Columns used for gel permeation chromatography include “ ⁇
- SKgelG-4000HXL TSKgelG-3000HXL
- TSKgelG-2500HXL TSKgelG_2000HXL (all trade names, manufactured by Tosoh Corporation).
- the aqueous resin dispersion generally has an oil length in the range of 0.5 to 45%, preferably 3 to 30%, more preferably 10 to 25%. If the oil length is less than 0.5%, the coating is not sufficiently oxidized and hardened, while if it exceeds 45%, the coating becomes hard and brittle with drying and aging, and the weather resistance and weather resistance of the formed coating film are reduced. Poor performance such as alkalinity.
- the oil length is the weight percentage of the fatty acid contained in the solid content of the aqueous resin dispersion.
- the aqueous resin composition provided by the present invention comprises the aqueous resin dispersion obtained as described above.
- the aqueous resin composition can further include a hydrazine derivative.
- a hydrazine derivative include saturated dicarboxylic acids having 2 to 18 carbon atoms such as oxalic acid dihydrazide, malonic acid dihydrazide, daltaric acid dihydrazide, succinic acid dihydrazide, adipic acid dihydrazide, and sebacic acid dihydrazide.
- Acid dihydrazide monoolefinic unsaturated dicarboxylic acid dihydrazide such as maleic dihydrazide, fumaric acid dihydrazide, itaconic acid dihydrazide Phthalic acid dihydrazide, terephthalic acid dihydrazide or isophthalic acid dihydrazide; pyromellitic dihydrazide, trihydrazide or tetrahydrazide; eutrilotrihydrazide, citrate trihydrazide, 1,2,4-benzentrihydrazide, ethylenediaminetetraacetic acid Tetrahydrazide, 1,4,5,8-naphthoic acid tetrahydrazide; polyhydrazide obtained by reacting a low polymer having a lower alkyl ester group of carboxylic acid with hydrazine or hydrazine hydrate (hydrazine hydrazide); dihydrazide carbonate Bisemicarbazide
- a coating film formed therefrom adsorbs harmful substances in the air, for example, formaldehyde, and thus is useful for removing these harmful substances.
- the resin dispersion has a carbonyl group, it can act as a crosslinking agent for auxiliary crosslinking.
- the amount of the hydrazine derivative to be blended is generally in the range of 0.01 to 10% by weight, particularly preferably 0.1 to 8% by weight, based on the resin solid content of the aqueous resin dispersion.
- the aqueous resin composition may contain a wetting agent, an antifoaming agent, a plasticizer, a film-forming aid, an organic solvent, a thickener, a preservative, a fungicide, a pH adjuster, a curing catalyst, and a surface.
- Additives such as regulators can be selected appropriately and contained in combination.
- a metal dryer, an ultraviolet absorber, and an ultraviolet stabilizer as described above can be included in the aqueous resin composition.
- the aqueous resin composition provided by the present invention can be cured even at room temperature,
- the cured film to be formed has transparency, and specifically, the transmission haze value of the cured film can be, for example, 5 or less.
- the transmission haze value was measured on a transparent sheet whose transmission haze value was previously measured using “COH—300 A” (trade name, a color difference / turbidity measuring device manufactured by Nippon Denshoku Industries Co., Ltd.).
- aqueous resin composition is used for coatings for architectural purposes, automotive exterior panels, automotive parts, etc., coating materials for printing inks, additives for paints, bonding agents for non-woven fabrics, adhesives, fillers, It can be used for various applications such as molding materials and resists.
- Aqueous paint composition is used for coatings for architectural purposes, automotive exterior panels, automotive parts, etc., coating materials for printing inks, additives for paints, bonding agents for non-woven fabrics, adhesives, fillers, It can be used for various applications such as molding materials and resists.
- the present invention also provides an aqueous coating composition comprising the above aqueous resin composition.
- the aqueous coating composition can be used as a clear coating or as an enamel coating.
- coloring pigments When used as an enamel paint, coloring pigments, brilliant pigments, extender pigments, anti-pigment pigments and the like known in the paint field can be blended as the pigment component.
- titanium white is generally used in an amount of 5 to 25%, preferably 7%, in order to maintain the fluffiness of the formed coating film and to give a glossy finished appearance. It is desirable to contain the pigment at a volume pigment concentration (PVC) within the range of ⁇ 22%.
- the titanium white is preferably a rutile type from the viewpoint of weather resistance.
- the “pigment volume concentration” is a volume ratio of the pigment to the total solid content of all the pigments and all pigments in the paint.
- the specific gravity of the pigment used as a basis for calculating the volume of the pigment is based on “Coating Material Handbook, 6th Edition” (Japan Paint Manufacturers Association). The specific gravity shall be close to 1.
- the above-mentioned water-based coating composition contains a water-soluble or emulsion-type acrylic resin, an alkyd resin, a silicone resin, a fluorine resin, an epoxy resin, a urethane resin, a polyester resin, and other modifying resins and pigments.
- Dispersant such as photocatalytic acid value titanium, polyalkylene glycol-modified alkyl silicate and other low-polluting agents can be used alone or in combination of two or more.
- the aqueous coating composition can be applied to a new substrate surface or an old coating film surface, and the substrate is not particularly limited.
- the substrate is not particularly limited.
- concrete, mortar, slate plate, PC plate, ALC Board, cement calcium silicate board, concrete block, wood, stone, etc .; inorganic base; plastic, etc .; organic base; iron, aluminum, etc., metal; etc .; Coating films such as acrylic resin, acrylic urethane resin, polyurethane resin, fluorine resin, silicon acrylic resin, butyl acetate resin, epoxy resin, and alkyd resin provided on the upper surface are exemplified.
- An aqueous or solvent-type undercoat material may be applied to these surfaces to be coated, and if necessary, the above-mentioned aqueous coating composition can be applied as an overcoat material after applying the undercoat material. . It is also possible to apply a known aqueous overcoat material after applying the aqueous coating composition of the present invention as an undercoat material.
- the water-based coating composition of the present invention is suitable for use as a protective coating on iron substrates or painted surfaces on iron substrates since the fatty acid component of the aqueous resin dispersion is well compatible with iron. The appearance can be maintained over a long period of time only by coating several times.
- the water-based coating composition of the present invention When the water-based coating composition of the present invention is applied to a metal surface such as an iron base material, the water-based coating composition contains a phosphoric acid-based pigment in an amount of 1 to 10% by PVC, preferably 2 to 8%. It is desirable to contain.
- the phosphoric acid-based pigment be easily dispersible in the presence of the polymer surfactant from the viewpoints of corrosion resistance and gloss.
- Specific examples of the phosphoric acid pigment include, for example, zinc phosphate, zinc zinc silicate, zinc aluminum phosphate, zinc zinc phosphate, calcium phosphate, aluminum pyrophosphate, calcium pyrophosphate, aluminum dihydrogen tripolyphosphate. , Aluminum metaphosphate, calcium metaphosphate, zinc phosphomolybdate, aluminum phosphomolybdate and the like.
- the aqueous coating composition of the present invention can further contain at least one basic compound selected from the group consisting of nitrite, phytate, tannate, and polyamine compound.
- polyamine compound examples include N- (2-hydroxyshethyl) ethylenediaminetriacetic acid (HEDTA), ethylenediaminetetraacetic acid (EDTA), diethylenetriaminepentaacetic acid (DTPA), propylenediaminetetraacetic acid (PDTA), iminoniacetic acid, tri-triacetate (NTA), diethylenetriaminepentamethylenephosphonic acid (DTP MP), and their alkalis Metal salt, monoalkylamine ⁇ polyamine, Interlayer compounds formed by intercalating a quaternary ammonium ion or the like with a layered phosphate such as aluminum trihydrogen diphosphate are exemplified. These can be used alone or in combination of two or more.
- the amount of the basic compound to be added is suitably in the range of 0.02 to 2% by weight, preferably 0.05 to 1% by weight, based on the weight of the aqueous coating composition.
- the aqueous coating composition of the present invention can be applied by, for example, a method such as air spray coating, airless spray coating, electrostatic coating, brush coating, roller coating, ricin gun, and all-purpose gun. It may be any of calo-heat drying, forced drying and room temperature drying. In the present specification, drying conditions at 40 ° C or less are room temperature drying, drying conditions at 40 ° C or more and less than 80 ° C are forced drying, and drying conditions at 80 ° C or more are heating drying. I do.
- the coating amount of the aqueous coating composition of the present invention can be, for example, in the range of 50 to 300 g Zm 2 . Example Hereinafter, the present invention will be described more specifically with reference to examples. Note that “parts” and “%” are “parts by weight” and “weight 0 /.”
- a fatty acid-modified monomer (a-2) was obtained in the same manner as in Production Example 1 except that the components to be reacted were changed as follows.
- a fatty acid-modified monomer (a-3) was obtained in the same manner as in Production Example 1 except that the components to be reacted were changed as follows.
- the monomer emulsion was transferred to a flask and diluted with deionized water so that the solid concentration was 45%. Thereafter, the temperature was raised to 85 ° C, an aqueous initiator solution in which 2 g of “VA-086” (Note 2) was dissolved in 64.7 g of deionized water was charged into the flask, and the mixture was stirred for 3 hours while maintaining the temperature. did. Thereafter, an aqueous solution of an initiator obtained by dissolving 0.5 g of “VA-086” (Note 2) in 16.2 g of deionized water was added to the flask, and the mixture was stirred for 1 hour while maintaining the temperature.
- the solution was cooled to ° C and the pH was adjusted to 8.0 with dimethylaminoethanol to obtain an aqueous resin dispersion (I-1) having a solid content of 40% and an average particle diameter of the dispersed resin of 185 ⁇ m.
- Aqueous resin dispersions (1-2) to (1-14) and (1-15) were obtained in the same manner as in Example 1 except that the composition of the monomer emulsion was changed as described in Table 1. Was.
- Each monomer, emulsifier, and deionized water were charged into a glass beaker with the composition shown in Table 1, and the mixture was stirred at 2000 rpm for 15 minutes using a disperser to produce a monomer emulsion.
- the average particle size of the dispersed particles of the monomer emulsion was 8,100 nm.
- 2 g of “VA-086” (Note 2) was added to the monomer chloride and stirred until dissolved.
- 0.08 g of “Newco 1 707 SF” (Note 1) and 50 g of deionized water were charged into a flask, and the temperature was raised to 85 ° C.
- the monomer emulsion was transferred to a flask and diluted with deionized water to a solid concentration of 45%. Thereafter, the temperature was raised to 85 ° C., an initiator aqueous solution in which 1.0 part of ammonium persulfate was dissolved in 15 parts of deionized water was charged into the flask, and the mixture was stirred for 3 hours while maintaining the temperature. Thereafter, an initiator aqueous solution obtained by dissolving 0.3 part of ammonium persulfate in 2.7 parts of deionized water was added to the flask, and the mixture was stirred for 1 hour while maintaining the temperature, and then cooled to 40 ° C. The pH was adjusted to 8.0 with dimethylaminoethanol to obtain an aqueous resin dispersion (1-18) having a solid content of 40% and an average particle size of the dispersion resin of 165 nm.
- Aqueous resin dispersions (1-19) to (1-36) were prepared in the same manner as in Example 15 except that the composition was changed as described in Tables 2 and 3 below. ) was manufactured.
- Example 1 the obtained preliminary milk solution was stirred at 10,000 rpm for 5 minutes using a disperser having a high shearing ability to obtain a monomer emulsion having an average particle diameter of dispersed particles of 520 nm.
- Fatty acid-modified monomer (a-3) 33.33 33.33 33.33 33.33 33.33 33.33
- Fatty acid-modified monomer (a-4) 30 Styrene 15 15 12 15 15 15 15 15 15 15 15 15 15 15 15 15
- aqueous resin composition was obtained according to the composition shown in Table 4 below.
- the storage stability and transparency of each aqueous resin composition were evaluated according to the following criteria. The results are shown in Table 4.
- ITEXANOL Trade name, manufactured by Eastman Chemical Company, 2,2,4-trimethyl-1,3-pentanediol monoisobutylate, film-forming aid
- the OHP sheet whose transmission haze value was previously measured with “COH-300 AJ (trade name, color difference / turbidity measuring device manufactured by Nippon Denshoku Industries Co., Ltd.)”, was set so that the dry film thickness became 20 ⁇ .
- a water-based resin composition was applied and cured for one week at 20 C.
- the test specimen was used as a test specimen. Color difference was measured with a turbidity measuring device, and the value obtained by subtracting the transmission haze value of the OHP sheet was defined as the transparency. The lower the value, the better the transparency.
- Each aqueous resin composition was placed in a 1-L capacity inner coat can in an amount of 1 kg, filled with nitrogen, and stored at 40 ° C. for 30 days. Thereafter, the temperature was returned to room temperature, and the state in the container was visually observed, and evaluated according to the following criteria.
- each aqueous resin dispersions (1-1) to (1-37) was charged into each of the pigment pastes, and the components shown in the composition (B) shown in Table 5 were sequentially added.
- each aqueous coating composition was evaluated according to the following criteria. The results are shown in Table 5 together with the properties of each aqueous coating composition.
- Corrosion protection O ⁇ O ⁇ O ⁇ OOOOO ⁇ O ⁇ O o ⁇ ⁇ Accelerated weather resistance 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8 points 8
- Corrosion protection O ⁇ OO ⁇ O ⁇ ⁇ OOOOOOO ⁇ ⁇ ⁇ ⁇ Accelerated weather resistance 8 points 8 points 10 points 9 points 10 points 10 points 10 points 10 points 8 points 10 points 8 points 8 points 10 points 8 points 8 points 8 points 8 points 8 points 8 points 7 points
- Each aqueous coating composition was applied to a glass plate using a 6 mil doctor blade, and dried at a temperature of 20 ° C and a relative humidity of 60% to obtain each test coated plate. One day later, the appearance of the coating film was visually evaluated.
- ⁇ The feeling of meat is particularly excellent.
- a steel plate (150 x 70 x 0.8 mm) specified in JISK 5410 is degreased with xylene, and each water-based paint composition is diluted with tap water to about 70 KU, and the amount applied is 150 g with a brush. / m 2, and dried for 1 week under the conditions of a temperature of 20 ° C and a relative humidity of 60% to obtain each test coated plate.
- JISK 5 It was subjected to a water resistance test (immersion for 96 hours) according to 8.19 of 400. Each coated surface after the test was evaluated according to the following criteria.
- Each test coated plate prepared in the same way as for the corrosion protection test was irradiated for 1000 hours in accordance with the accelerated weathering test of 9.8.1 (Sunshine carbon arc lamp type) of JISK 5400, and the coated plate surface was The evaluation was made according to JIS K 5400, 9.6 chalk. A lower score indicates that the chalking is progressing.
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Abstract
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EP04712186A EP1598373A4 (en) | 2003-02-19 | 2004-02-18 | PROCESS FOR PRODUCING AQUEOUS RESIN DISPERSION |
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JP2008255194A (ja) * | 2007-04-03 | 2008-10-23 | Kansai Paint Co Ltd | 水性樹脂組成物 |
JP2010540762A (ja) * | 2007-10-08 | 2010-12-24 | エボニック レーム ゲゼルシャフト ミット ベシュレンクテル ハフツング | 乳化重合体、水性分散液およびそれらを製造するための方法 |
JP2013540844A (ja) * | 2010-09-01 | 2013-11-07 | ビーエーエスエフ ソシエタス・ヨーロピア | 水性のエマルションポリマー、その製造及び使用 |
CN106573356A (zh) * | 2014-05-30 | 2017-04-19 | 东海光学株式会社 | 防偏移用涂层剂 |
JPWO2021024999A1 (ja) * | 2019-08-05 | 2021-02-11 |
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US8092555B2 (en) * | 2007-05-10 | 2012-01-10 | Valspar Corporation | Concrete coloring compositions and methods |
US8460399B2 (en) * | 2007-05-10 | 2013-06-11 | Valspar Corporation | Weak acid based concrete stain |
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EP2212360B1 (de) * | 2007-11-21 | 2013-07-03 | Basf Se | Verfahren zur herstellung von emulsionspolymerisation |
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- 2004-02-18 EP EP04712186A patent/EP1598373A4/en not_active Withdrawn
- 2004-02-18 KR KR1020057015309A patent/KR20050111328A/ko not_active Application Discontinuation
- 2004-02-18 US US10/546,070 patent/US7479524B2/en not_active Expired - Fee Related
- 2004-02-19 TW TW093104029A patent/TWI267538B/zh not_active IP Right Cessation
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JP2005343966A (ja) * | 2004-06-01 | 2005-12-15 | Kansai Paint Co Ltd | 水性樹脂分散体の製造方法 |
WO2007042684A1 (fr) * | 2005-10-14 | 2007-04-19 | Rhodia Recherches Et Technologies | Procede pour preparer un copolymere greffe par des acides gras polyinsatures, copolymere greffe par des acides gras polyinsatures susceptible d'etre obtenu par ce procede et ses utilisations |
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JP2010540762A (ja) * | 2007-10-08 | 2010-12-24 | エボニック レーム ゲゼルシャフト ミット ベシュレンクテル ハフツング | 乳化重合体、水性分散液およびそれらを製造するための方法 |
JP2013540844A (ja) * | 2010-09-01 | 2013-11-07 | ビーエーエスエフ ソシエタス・ヨーロピア | 水性のエマルションポリマー、その製造及び使用 |
CN106573356A (zh) * | 2014-05-30 | 2017-04-19 | 东海光学株式会社 | 防偏移用涂层剂 |
JPWO2021024999A1 (ja) * | 2019-08-05 | 2021-02-11 | ||
WO2021024999A1 (ja) * | 2019-08-05 | 2021-02-11 | 株式会社日本触媒 | エマルション粒子含有水性分散体 |
Also Published As
Publication number | Publication date |
---|---|
JP5016817B2 (ja) | 2012-09-05 |
EP1598373A4 (en) | 2010-03-03 |
EP1598373A1 (en) | 2005-11-23 |
JPWO2004074327A1 (ja) | 2006-06-01 |
TW200427796A (en) | 2004-12-16 |
US7479524B2 (en) | 2009-01-20 |
US20060167178A1 (en) | 2006-07-27 |
TWI267538B (en) | 2006-12-01 |
KR20050111328A (ko) | 2005-11-24 |
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