JP2000281960A - Coating composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a coating composition excellent in adhesion to a polyolefin substrate by incorporating, into the same, an emulsion composition which contains resin particles dispersed therein and containing both an olefinic polymer and an acrylic polymer in the same particle. SOLUTION: An emulsion which contains resin particles dispersed therein, containing both an olefinic polymer and an acrylic polymer in the same particle, and having a wt. average particle size of 10 nm to 500 μm, preferably 10 nm to 100 μm, is prepared by polymerizing 5-90 wt.%, preferably 5-70 wt.%, acrylic monomer having a water solubility (at 20 deg.C) of 0.0-0.5% in the presence of an aqueous emulsin containing 95-10 wt.%, preferably 95-30 wt.%, olefinic polymer particles dispersed therein and formed by copolymerizing 99.9-35.0 wt.% olefinic monomer and 0.1-65.0 wt.% other monomer. Thus prepared emulsion is compounded with additives such as a curative, a crosslinker, a film-forming assistant, an antifoaming agent, a cissing preventive, a leveling agent, a tackifier, a hardness-imparting agent, an antiseptic, a thickener, and an antifreezing agent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a coating composition containing a specific emulsion composition.

[0002]

2. Description of the Related Art Various plastic substrates such as polyethylene, ethylene / vinyl acetate copolymer, ionomer,
Polypropylene, polyamide (nylon), polyester, polyethylene terephthalate, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, ethylene
A coating composition may be applied to a vinyl alcohol copolymer, a polycarbonate, a polystyrene, a polyacrylonitrile copolymer, or a polymethyl methacrylate copolymer in order to improve appearance, durability, and the like. It is necessary that the coating composition has good adhesion to the substrate after drying, but especially a coating composition having good adhesion to polyolefin-based substrates, for example, polyethylene, polypropylene, ionomer, etc. Most of them use a solvent-based resin, and a water-based coating composition has been demanded in recent years because of problems of environmental burden and residual solvent odor.
However, few of them are water-based and have good adhesion to the polyolefin-based substrate, and their performance is insufficient.
Further, when applying a coating composition comprising a polar resin to a polyolefin-based substrate, for example, a coating composition comprising a polyacryl, a polystyrene-acryl copolymer, a polyacrylonitrile copolymer, a urethane resin, a polyester, an epoxy resin, or the like. Since these coating compositions have poor adhesion to a substrate, another coating composition called a primer has been applied in advance to adhere the substrate and the coating composition. In this case, a coating composition having adhesion to both the polyolefin base material and the polar resin as a primer, and further, a water-based coating composition are desired.

[0003] The technologies disclosed at present include the following. [JP-A-57-40545] JP-A-57-4054
No. 5 discloses that ethylene is 5 to 30% by weight.
A method for polymerizing an acrylic monomer in the presence of an aqueous emulsion of a vinyl acetate polymer under a water-soluble initiator is disclosed. The emulsion composition obtained by this production method has a low ethylene content and a high vinyl acetate content.

[Japanese Patent Publication No. 63-64446]
No. 64446 discloses that in a suspension containing olefin polymer particles, a vinyl monomer and a specific initiator, a vinyl monomer is impregnated in the olefin polymer particles, and then heated to carry out polymerization. A method for producing olefin polymer particles to be completed is disclosed. This polymerization is carried out in a solvent, the particles are taken out after the polymerization, and the particles themselves are used as a product. It is also disclosed that the average particle size (average particle diameter) of the olefin polymer particles is preferably about 1 to 8 mm.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide an aqueous coating composition having good adhesion to a polyolefin substrate. An object of the present invention is to provide a coating composition for a primer, which makes it possible to apply a coating composition comprising a resin.

[0006]

The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, have found that an aqueous coating composition having good adhesion to polyolefin and a coating composition for a primer. Product containing a specific olefin polymer and a specific acrylic polymer in the same particle, and finding that the particle can be obtained by containing an emulsion composition dispersed in water to complete the present invention. Reached. That is, the present invention is specified by the matters described below.

[1] A coating composition comprising an emulsion composition in which resin particles containing an olefin polymer (A) and an acrylic polymer (B) in the same particle are dispersed in water. [2] Based on the total weight of the olefin polymer (A) and the acrylic polymer (B), 95 to 10% by weight of the olefin polymer (A) and 5 to 5% of the acrylic polymer (B).
The coating composition according to [1], which is 90% by weight. [3] The description given in [1] or [2], wherein the “olefin-based polymer (A)” is configured to include a (co) polymer of the olefin-based monomer (a-1). Paint composition.

[4] "Olefin polymer (A)"
Is a composition including at least one selected from the group consisting of an ethylene / butene copolymer, an ethylene / propylene copolymer, and an ethylene / butene / propylene copolymer, [1] to The coating composition according to any one of [3]. [5] "Olefin polymer (A)" is ethylene
Comprising a vinyl acetate copolymer,
The coating composition according to any one of [1] to [4]. [6] “Olefin polymer (A)” includes a copolymer of olefin monomer (a-1) and monomer (a-2) other than olefin monomer. Is a thing,
The coating composition according to any one of [1] to [5].

[7] The ratio of the olefin monomer (a-1) to the monomer (a-2) other than the olefin monomer is
Based on the total weight of the olefin monomer (a-1) and the monomer (a-2) other than the olefin monomer, 99.9 to 35.0 of the olefin monomer (a-1). % By weight, monomer (a-2) other than olefin-based monomer 0.1 to 6
The coating composition according to [6], which is 5.0% by weight. [8] “A monomer other than the olefin monomer (a-
2)] is a coating composition according to [6] or [7], wherein at least a part of the monomer does not contain a carboxyl group. [9] “A monomer other than the olefin monomer (a-
2)] is a composition containing only a monomer containing no carboxyl group.

[10] The coating composition according to [8] or [9], wherein the “monomer (a-2) other than the olefin monomer” is “vinyl acetate”. [11] The coating composition according to any one of [1] to [10], wherein the acrylic polymer (B) comprises a polymer of an acrylic monomer (b). [12] The coating composition according to [11], wherein the “acrylic monomer (b)” contains at least a part of a monomer having a water solubility of 0.0 to 0.5%. .

[13] "Acrylic monomer (b)"
The coating composition according to [11] or [12], wherein at least a part of the monomer composition does not contain a carboxyl group. [14] The “acrylic monomer (b)” contains only a monomer containing no carboxyl group.
The coating composition according to [11] or [12]. [15] “Acrylic monomer (b)” is styrene,
And / or the coating composition according to any one of [11] to [14], which contains at least a portion of 2-ethylhexyl acrylate.

[16] The weight average particle diameter of the resin particles is
The coating composition according to any one of [1] to [15], which has a thickness of 10 nm to 500 μm. [17] Obtained by polymerizing an acrylic monomer (b) in an olefin emulsion in which resin particles containing an olefin polymer (A) are dispersed in water.
A coating composition comprising an emulsion composition in which resin particles containing an olefin polymer (A) and an acrylic polymer (B) in the same particle are dispersed in water. [18] 95 to 10% by weight of the olefin polymer (A) and 5 to 5% of the acrylic polymer (B) based on the total weight of the olefin polymer (A) and the acrylic polymer (B).
The coating composition according to [17], which is 90% by weight.

[19] "Olefin polymer (A)"
Is a composition containing a (co) polymer of an olefinic monomer (a-1). [17] or the coating composition according to [18]. [20] The “olefin-based polymer (A)” contains at least one selected from the group consisting of an ethylene / butene copolymer, an ethylene / propylene copolymer, and an ethylene / butene / propylene copolymer. The coating composition according to any one of [17] to [19], comprising: [21] The “olefin-based polymer (A)” is configured to include an ethylene-vinyl acetate copolymer.
The coating composition according to any one of [17] to [20].

[22] "Olefin polymer (A)"
Is a composition comprising a copolymer of an olefin monomer (a-1) and a monomer (a-2) other than the olefin monomer (17) to (21). The coating composition according to any one of the above. [23] The ratio of the olefin monomer (a-1) and the monomer (a-2) other than the olefin monomer is other than the olefin monomer (a-1) and the olefin monomer. Of the olefin monomer (a-1) based on the total weight of the monomer (a-2), and 99.9 to 35.0% by weight of the monomer (a-2) other than the olefin monomer. ) 0.1 to 65.0% by weight
The coating composition according to [22], wherein

[24] [22] or [23] wherein the “monomer (a-2) other than the olefin-based monomer” contains at least a part of a monomer having no carboxyl group. ] The coating composition described in the above. [25] “A monomer other than the olefin monomer (a-
2)] is a coating composition according to [22] or [23], which contains only a monomer containing no carboxyl group. [26] “A monomer other than the olefin monomer (a-
2) is “vinyl acetate”, [24] or [2]
5] The coating composition according to the above.

[27] The coating composition according to any one of [17] to [26], wherein the acrylic polymer (B) comprises a polymer of an acrylic monomer (b). . [28] The coating composition according to [27], wherein the “acrylic monomer (b)” contains at least a part of a monomer having a water solubility of 0.0 to 0.5%. . [29] The coating composition according to [27] or [28], wherein the “acrylic monomer (b)” contains at least a part of a monomer having no carboxyl group.

[30] "Acrylic monomer (b)"
Is a coating composition according to [27] or [28], which contains only a monomer containing no carboxyl group. [31] “Acrylic monomer (b)” is styrene,
And / or the coating composition according to any one of [27] to [30], which contains at least a portion of 2-ethylhexyl acrylate. [32] The weight average particle diameter of the resin particles is from 10 nm to 5
The coating composition according to any one of [17] to [31], which has a size of 00 μm.

[33] Any one of [17] to [32], wherein an initiator having a water solubility of 0 to 10% is used when polymerizing the acrylic monomer (b). The coating composition described in 1. [34] The coating composition for polyolefin according to any one of [1] to [33]. [35] The coating composition for a primer according to any one of [1] to [34].

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, an olefin monomer (a-1), that is, an olefin polymer (A) is used.
The olefin monomer (a-1) to be used for the polymerization of is not particularly limited. In the present invention, specific examples of the olefin-based monomer (a-1) include, for example, ethylene, propylene, 1-butene, 3-methyl-1-butene, 4
-Methyl-1-pentene, 3-methyl-1-pentene, 1-
Α-olefins such as heptene, 1-hexene, 1-decene and 1-dodecene; conjugated dienes such as butadiene, ethylidene norbornene, dicyclopentadiene and 1,5-hexadiene, and non-conjugated dienes; One or more types of body can be selected.

In the present invention, the monomer (a-2) other than the olefin monomer, that is, the monomer other than the olefin monomer used for the polymerization of the olefin polymer (A) is an olefin monomer. It is not particularly limited as long as it is a monomer copolymerizable with the monomer. In the present invention, specific examples of the monomer (a-2) other than the olefin-based monomer include, for example, vinyl acetate, vinyl alcohol, and the like. Can be selected.

The ratio of the olefin monomer (a-1) to the monomer (a-2) other than the olefin monomer is determined by the ratio of the olefin monomer (a-1) to the monomer other than the olefin monomer. Preferably, based on the total weight of the monomer (a-2), the olefin monomer (a-1) is 99.9 to 35.0% by weight /
Monomers (a-2) other than olefinic monomers 0.1 to 6
5.0% by weight, and more preferably 99.9 to 50.0% by weight of olefin-based monomer (a-1) /0.1 of monomer (a-2) other than olefin-based monomer. To 50.0% by weight, more preferably an olefin-based monomer (a
-1) 99.9 to 70.0% by weight / 0.1 to 30.0% by weight of monomer (a-2) other than olefinic monomer. The olefin monomer (a-1) is 35.0% by weight.
If it is less than the characteristic as an olefin is not expressed,
For example, there may be a problem that the adhesion to a polyolefin substrate is reduced. In the present invention, examples of the olefin polymer (A) include the following.

An olefin polymer (A) obtained by polymerizing the olefin monomer (a-1). An olefin polymer (A) obtained by polymerizing an olefin monomer (a-1) and a monomer (a-2) other than the olefin monomer. In the present invention, specific examples of the olefin-based polymer (A) include low-density polyethylene, high-density polyethylene, polypropylene, poly 1-butene, and poly 3-methyl-1-
Butene, poly 4-methyl-1-pentene, poly 3-methyl-1-pentene, or ethylene / propylene copolymer, ethylene / 1-butene copolymer, propylene
Ethylene represented by 1-butene copolymer, propylene / 1-butene / ethylene copolymer, propylene, 1-butene, 3-methyl-1-butene, 4-methyl-1-pentene, 3-methyl-1 -Pentene, 1-heptene, 1-
Represented by α-olefin homopolymers such as hexene, 1-decene and 1-dodecene, or random or block copolymers thereof, or ethylene / butadiene copolymer or ethylene / ethylidene norbornene copolymer Copolymer of α-olefin and conjugated diene or non-conjugated diene, or ethylene / propylene / butadiene terpolymer, ethylene / propylene / dicyclopentadiene terpolymer, ethylene / propylene /
A copolymer of two or more α-olefins represented by an ethylidene norbornene terpolymer, an ethylene / propylene / 1,5-hexadiene terpolymer and a conjugated diene or a non-conjugated diene, or And copolymers of olefin resins such as ethylene-vinyl acetate copolymers and ethylene-vinyl alcohol copolymers with other thermoplastic monomers. In particular, in the ethylene-vinyl acetate copolymer, those having a proportion of a repeating unit derived from a vinyl acetate monomer of 50% by weight or less are preferable in terms of water resistance, and those having a proportion of 30% by weight or less are more preferable. preferable.

In the present invention, the acrylic monomer (b), that is, the acrylic monomer (b) used for the polymerization of the acrylic polymer (B) is not particularly limited. In the present invention, specific examples of the acrylic monomer (b) include, for example, (meth) acrylic esters, particularly alkyl esters having 1 to 12 carbon atoms, but, for example, methyl acrylate, acrylic acid Ethyl, n-butyl acrylate, i-butyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, methyl methacrylate, ethyl methacrylate, n-butyl methacrylate, i-butyl methacrylate, 2 methacrylate
-Ethylhexyl, lauryl methacrylate and the like; aromatic monomers such as styrene and α-methylstyrene, and polar group-containing monomers such as hydroxyethyl acrylate and hydroxypropyl acrylate having a hydroxyl group;
Hydroxyalkyl acrylates such as hydroxyethyl methacrylate and hydroxypropyl methacrylate; acrylic acid, methacrylic acid, crotonic acid, itaconic acid, fumaric acid, and maleic acid having a carboxyl group; and acrylonitrile and methacrylic acid as monomers having other polar groups. Lonitrile, acrylamide, methacrylamide,
Glycidyl methacrylate and the like;
Species, or two or more species can be selected.

At least one of the acrylic monomers (b) preferably has a water solubility of 0.0 to 0.5%. Aqueous solubility refers to acrylic monomer (b) at 20 ° C
Is a ratio that dissolves in water, and when a monomer having water solubility of more than 0.5% is used for all the acrylic monomers (b),
This is because it becomes difficult to generate the acrylic polymer (B) in the particles of the olefin polymer (A). When the total amount of the acrylic monomer (b) is 100% by weight, the acrylic monomer (b) having a water solubility of 0.0 to 0.5% is preferably 20% by weight or more. , More preferably 30% by weight or more, still more preferably 40% by weight.
That is all.

Specific examples of the acrylic monomer (b) having a water solubility of 0.0 to 0.5% include, for example, styrene, 2-ethylhexyl (meth) acrylate, (meth)
Examples thereof include n-butyl acrylate, i-butyl (meth) acrylate, and t-butyl (meth) acrylate.

When a monomer having a carboxyl group is used as the acrylic monomer (b), the amount used is 5% when the total amount of the acrylic monomer (b) is 100% by weight. % By weight or less, more preferably 3% by weight or less.
%, Most preferably not used. When the amount of the monomer having a carboxyl group exceeds 5% by weight, it may be difficult to form the acrylic polymer (B) in the particles of the olefin polymer (A).

The weight ratio of the olefin polymer (A) to the acrylic polymer (B) is based on the total weight of the olefin polymer (A) and the acrylic polymer (B). A) 95 to 10% by weight, acrylic polymer (B) 5 to 90% by weight is preferable, and olefin polymer (A) 95 to 30% by weight, and acrylic polymer (B) 5 to 70% are more preferable. %, Most preferably 95 to 40% by weight of the olefin polymer (A) and 5 to 60% by weight of the acrylic polymer (B). When the amount of the olefin polymer (A) is less than 5% by weight, the characteristics of the olefin are not exhibited, and there is a problem that, for example, the adhesion to a polyolefin substrate is reduced. Conversely, when the olefin-based polymer (A) is 90% by weight or more, acrylic characteristics are not exhibited, and for example, there is a problem that adhesion to a polar resin is reduced.

In the present invention, the resin particles comprise the olefin polymer (A) and the acrylic polymer (B) in the same particle.
And its form is not particularly limited, and examples thereof include, for example, “adhesive (1990, Vol. 34, No. 1, 1)
7)), a core / shell structure, a composite structure, a localized structure, a bar-shaped structure, a weed-like structure, a raspberry-like structure, a multi-particle composite structure, and an IPN structure.

In the present invention, the weight average particle size of the resin particles is preferably from 10 nm to 500 μm, more preferably from 10 nm to 500 μm.
nm to 100 μm, more preferably 10 nm to 10 μm
m, most preferably from 10 nm to 2 μm. When the particle diameter exceeds 500 μm, particle separation during long-term storage usually becomes remarkable, and further, low-temperature film-forming properties and water resistance are likely to be reduced.

The emulsion composition according to the present invention is produced by polymerizing the acrylic monomer (b) in the presence of an emulsion in which particles of the olefin polymer (A) are dispersed in water. Olefin polymer (A)
Acrylic polymer (B) is generated in the particles of (1).

An olefin emulsion in which the particles of the olefin polymer (A) are dispersed in water is obtained by dispersing the olefin polymer (A) in water using an emulsifier or a dispersant. For example, Japanese Patent Publication No. 7-0089
No.33, No.5-099975, No.4-030
970, JP-B-42-000275, JP-B-42-0
No. 23085, JP-B-45-029909, JP-A-5-209
No. 1-062890. Specific examples of commercially available olefin-based emulsions include, for example, Chemipearl A100 and V10 manufactured by Mitsui Chemicals, Inc.
0, V200, V300, W100, W200 and the like.

The initiator used in the polymerization of the acrylic polymer (B) is not particularly limited. As specific examples of the initiator used at the time of polymerization of the acrylic polymer (B), for example, all initiators generally used for emulsion polymerization can be used. Representative examples include hydrogen peroxide; persulfates such as ammonium persulfate, potassium persulfate, and sodium persulfate; cumene hydroperoxide, t-butyl hydroperoxide, benzoyl peroxide, and t-butylperoxy-. 2-
Organic peroxides such as ethylhexanoate, t-butylperoxybenzoate, and lauroyl peroxide; azo compounds such as azobisisobutyronitrile; or metal ions such as iron ion and sodium sulfoxylate, formaldehyde; Redox initiators in combination with reducing agents such as sodium pyrosulfite, sodium bisulfite, L-ascorbic acid, and Rongalite, and the like, and one or more of these can be used. Specific examples of the initiator preferably used include those having a water solubility of 0 to 10%, more preferably 0 to 5%, and most preferably 0 to 3%. Generally, using initiators with water solubility greater than 10%,
It becomes difficult to generate the acrylic polymer (B) in the particles of the olefin polymer (A). The amount of the initiator used is practically 0.1 to 5% by weight based on the total amount of the monomers. Also, if necessary, t-dodecyl mercaptan,
Mercaptans such as n-dodecyl mercaptan, allyl compounds such as allylsulfonic acid, methallylsulfonic acid and their soda salts can also be used as molecular weight regulators.

When the acrylic monomer (b) is polymerized in the presence of the olefin emulsion, a surfactant used in ordinary emulsion polymerization can be used to improve the stability of the particles. . Specific examples of such surfactants include, for example, anionic surfactants, nonionic surfactants, cationic surfactants, and other reactive surfactants, and one or more of these surfactants. Can be used in combination. Nonionic surfactants include polyoxyethylene lauryl ether, polyoxyethylene octyl phenyl ether, polyoxyethylene oleyl phenyl ether, polyoxyethylene nonyl phenyl ether, oxyethylene / oxypropylene block copolymer, tert-octylphenoxyethyl poly Ethoxyethanol, nonylphenoxyethyl polyethoxyethanol and the like can be mentioned.

Examples of the anionic surfactant include sodium dodecylbenzenesulfonate, sodium lauryl sulfate, sodium alkyldiphenyletherdisulfonate, sodium alkylnaphthalenesulfonate, sodium dialkylsulfosuccinate, sodium stearate, potassium oleate, and sodium dioctylsulfosuccinate. , Sodium polyoxyethylene alkyl ether sulfate, sodium polyoxyethylene alkyl ether sulfate, sodium polyoxyethylene alkyl phenyl ether sulfate sodium dialkyl sulfosuccinate, sodium stearate, sodium oleate, tert-octylphenoxyethoxy polyethoxyethyl sodium sulfate And the like.

Examples of the cationic surfactant include lauryltrimethylammonium chloride, stearyltrimethylammonium chloride and the like. The use amount of the surfactant is not particularly limited, but if the use amount is large, particles composed only of the acrylic polymer (B) are generated, so that the acrylic polymer (A) is contained in the particles of the olefin polymer (A). B) is difficult to generate. The amount of the surfactant used is usually 0.02 to 5% by weight based on the total weight of the acrylic monomer (b).

The various monomers described above collectively include
Or dividedly, or continuously added dropwise, in the presence of the above-mentioned initiator at 0 to 100 ° C, practically 30 to 100 ° C.
Polymerized at a temperature of 90 ° C. In the coating composition of the present invention,
Various additives, for example, a curing agent, a cross-linking agent, a film-forming aid, an antifoaming agent, an anti-cissing agent, a leveling agent, a tackifier, a hardness-imparting agent, a preservative, a thickener, an antifreezing agent, a dispersant, and the like. Various pigments such as inorganic pigments and organic pigments can be added.

[0037]

The coating composition according to the present invention has excellent adhesion to both polyolefin substrates such as polyethylene and polypropylene and polar resins such as nylon, polystyrene, polyacryl and polyethylene terephthalate. And is useful as a coating composition for a polyolefin substrate or a primer coating composition for applying a coating composition comprising a polar resin to a polyolefin substrate.

[0038]

Next, the present invention will be described specifically with reference to examples.
You. Hereinafter, all parts and percentages are based on weight. [Example 1] Production of olefin-based emulsion As an olefin-based polymer, ethylene / 1-butene copolymer was used.
Combined (ethylene content 93 mol%, MFR = 15 g /
10 minutes, density 0.89 g / cm^Three) 100 parts, basic substance
Maleic anhydride graph acting as dispersant depending on quality
Polyethylene (maleic acid content 3.3% by weight, weight average
Equivalent molecular weight 2700, density 0.94 g / cm ^Three) 10 copies,
And, 5 parts of oleic acid is put into a pressure kneader,
Melt and knead at 140 ° C for 30 minutes. Next, anhydrous maleic
Acid-grafted polyethylene and all carboxylic acids of oleic acid
Potassium hydroxide (basic substance) necessary for neutralization
20 parts of the dissolved alkaline water were added to a pump connected to a kneader.
Press in for 5 minutes using a pump. The pressure inside the kneader is 3k
g / cm^TwoIt became. After continuing kneading for 30 minutes,
The contents were taken out after cooling to 60 ° C. The contents are
It was a white solid. Pour 10 parts of white solid into 10 parts of water
After stirring with a turbine blade stirrer, 100 mesh
It was filtered through a wire mesh. No residue was found. Got
Olefin emulsion has a solid content of 50%, pH 10
The weight average particle diameter by light scattering measurement is 0.80 μm.
there were. Polymerization of acrylic monomer (b) 140 parts of obtained olefin emulsion, deionized
Charge 152 parts of water into a reaction vessel and reach 80 ° C under a nitrogen stream.
The temperature rose. Separately, 15 parts of styrene, acrylic acid
15 parts of 2-ethylhexyl, benzoyl peroxide
0.3 parts dodecylbenzenesulfur in 12 parts deionized water
Emulsified mixture emulsified with 0.12 parts of sodium phonate
And the emulsified mixture is dropped into the reaction vessel in 3 hours.
Then, the mixture was further maintained at the same temperature for 4 hours to complete the polymerization.
I let you. The obtained emulsion has a nonvolatile content of 30% and a pH of 1
0, the weight average particle diameter by light scattering measurement is 0.83 μm
Met.

Example 2 A reaction vessel was charged with 100 parts of the olefin emulsion obtained in Example 1 and 165 parts of deionized water, and heated to 80 ° C. under a nitrogen stream. Separately, 25 parts of styrene, 25 parts of 2-ethylhexyl acrylate, and 0.5 part of benzoyl peroxide were added to 20 parts of deionized water in sodium dodecylbenzenesulfonate.
The emulsified mixture was emulsified using 2 parts, and the emulsified mixture was dropped into the reaction vessel in 3 hours, and then kept at the same temperature for 4 hours to complete the polymerization. The obtained emulsion had a nonvolatile content of 30% and a pH of 10, and had a weight average particle size of 0.87 μm as measured by light scattering.

Comparative Example 1 The olefin emulsion prepared in Example 1 was directly used for evaluation.

Comparative Example 2 197 parts of deionized water and 0.1 part of sodium dodecylbenzenesulfonate were charged into a reaction vessel and heated to 80 ° C. under a nitrogen stream. After the temperature was raised, 1 part of potassium persulfate was poured into the reaction vessel. Separately, 50 parts of styrene and 50 parts of 2-ethylhexyl acrylate were added to 40 parts of sodium dodecylbenzene sulfonate in 40 parts of deionized water.
The emulsified mixture was emulsified using 3 parts, and the emulsified mixture was dropped into the reaction vessel in 3 hours, and then kept at the same temperature for 4 hours to complete the polymerization. The obtained emulsion had a nonvolatile content of 30% and was adjusted to pH 10 with aqueous ammonia. Weight average particle size by light scattering measurement is 0.11
μm. The obtained emulsion composition was evaluated by the following method. The results are shown in the table.

[Evaluation Example 1] A polypropylene (PP) plate,
And a film thickness of 20 on a polyacrylic (MMA) plate after drying.
The emulsion composition is applied to a thickness of
For 30 minutes. After standing at room temperature for one day and night, JIS K
The adhesion was tested according to the method of 5400 8.5.2. Table 1 shows the evaluation results.

[Evaluation Example 2] An emulsion composition was applied on a polypropylene (PP) plate so as to have a thickness of 20 μm after drying, and dried at 80 ° C. for 30 minutes. Thereafter, EP Elite (aqueous matting paint) manufactured by Suzuka Fine Co., Ltd. was applied as a top coat so as to have a dry film thickness of 20 μm, dried at room temperature for 3 days, and then JIS K5400.
The adhesion was tested according to the method of 8.5.2. Further, the same test was performed on the case where the water-based matting paint was directly applied to the PP plate. Table 2 shows the evaluation results.

[Table 1] Results of Evaluation Example 1 {Emulsion base material type}種 Composition type PP board MMA board ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Example 1 100/100 100/100 Example 2 90/100 100/100 ─────────────────────────── Comparative Example 1 100/100 0/100 ────────────── ─────────────── Comparative Example 2 0/100 100/100 ━━━━━━━━━━━━━━━━━━━━━━━━━━ ━━━

[0045]

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Keiichi Taki, Inventor 1190 Kasama-cho, Sakae-ku, Yokohama-shi, Kanagawa Prefecture (72) Inventor Futa Hoshino 1190 Kasama-cho, Sakae-ku, Yokohama-shi, Kanagawa Mitsui Chemicals F Term (reference) 4J038 CA021 CA091 CB041 CB051 CB101 CB141 CG142 CH032 CH042 CJ022 CM021 MA08 MA10 MA14 NA12 PC08

Claims (35)

[Claims] 1. A coating composition comprising an emulsion composition in which resin particles containing an olefin polymer (A) and an acrylic polymer (B) in the same particle are dispersed in water. 2. 95 to 10% by weight of the olefin polymer (A) and the acrylic polymer (B) based on the total weight of the olefin polymer (A) and the acrylic polymer (B).
The coating composition according to claim 1, which is 5 to 90% by weight. 3. The method according to claim 1, wherein the “olefin-based polymer (A)” comprises a (co) polymer of the olefin-based monomer (a-1). Paint composition. 4. The olefin polymer (A) is at least one selected from the group consisting of an ethylene / butene copolymer, an ethylene / propylene copolymer, and an ethylene / butene / propylene copolymer. The coating composition according to any one of claims 1 to 3, wherein the coating composition comprises: 5. The coating composition according to claim 1, wherein the “olefin-based polymer (A)” comprises an ethylene-vinyl acetate copolymer. 6. An olefin polymer (A) comprising a copolymer of an olefin monomer (a-1) and a monomer (a-2) other than the olefin monomer. The coating composition according to any one of claims 1 to 5, which is to be applied. 7. The ratio of the olefin monomer (a-1) to the monomer (a-2) other than the olefin monomer is such that the olefin monomer (a-1) and the olefin monomer 99.9-35.0% by weight of the olefin-based monomer (a-1), based on the total weight of the monomer (a-2) other than the -2) The coating composition according to claim 6, which is 0.1 to 65.0% by weight. 8. A monomer other than the olefin-based monomer (a
The coating composition according to claim 6 or 7, wherein (2)) contains at least a part of a monomer containing no carboxyl group. 9. A monomer other than the olefin monomer (a)
The coating composition according to claim 6, wherein (-2) ”contains only a monomer containing no carboxyl group. 10. The coating composition according to claim 8, wherein the “monomer (a-2) other than the olefin-based monomer” is “vinyl acetate”. 11. The coating composition according to claim 1, wherein the acrylic polymer (B) comprises a polymer of an acrylic monomer (b). 12. The coating according to claim 11, wherein the “acrylic monomer (b)” contains at least a part of a monomer having a water solubility of 0.0 to 0.5%. Composition. 13. The coating composition according to claim 11, wherein the “acrylic monomer (b)” at least partially contains a monomer having no carboxyl group. 14. The coating composition according to claim 11, wherein the “acrylic monomer (b)” contains only a monomer containing no carboxyl group. 15. The acrylic monomer (b) contains at least a part of styrene and / or 2-ethylhexyl acrylate.
4. The coating composition according to any one of 4. 16. The resin particles having a weight average particle diameter of 10 n
The coating composition according to any one of claims 1 to 15, wherein the coating composition has a particle size of m to 500 µm. 17. An olefin polymer (A) obtained by polymerizing an acrylic monomer (b) in an olefin emulsion in which resin particles containing the olefin polymer (A) are dispersed in water. A coating composition containing an emulsion composition in which resin particles containing A) and an acrylic polymer (B) in the same particle are dispersed in water. 18. An olefin polymer (A) 95 to 10% by weight and an acrylic polymer (B) 5 to 90 based on the total weight of the olefin polymer (A) and the acrylic polymer (B). 18. The coating composition according to claim 17, which is in weight percent. 19. The olefin polymer (A) according to claim 17, wherein the “olefin polymer (A)” comprises a (co) polymer of an olefin monomer (a-1). Paint composition. 20. The olefin-based polymer (A) is at least one selected from the group consisting of an ethylene / butene copolymer, an ethylene / propylene copolymer, and an ethylene / butene / propylene copolymer. The coating composition according to any one of claims 17 to 19, comprising: 21. The coating composition according to claim 17, wherein the “olefin polymer (A)” comprises an ethylene / vinyl acetate copolymer. 22. An olefin polymer (A) comprising a copolymer of an olefin monomer (a-1) and a monomer (a-2) other than the olefin monomer. The coating composition according to any one of claims 17 to 21, which is to be applied. 23. The ratio of the olefin monomer (a-1) to the monomer (a-2) other than the olefin monomer is such that the olefin monomer (a-1) and the olefin monomer 99.9-35.0% by weight of the olefin-based monomer (a-1), based on the total weight of the monomer (a-2) other than the -2) 0.1 to 65.0
23. The coating composition according to claim 22, which is in weight percent. 24. The monomer according to claim 22, wherein the “monomer (a-2) other than the olefin-based monomer” contains at least a part of a monomer having no carboxyl group. Paint composition. 25. The coating composition according to claim 22, wherein the “monomer (a-2) other than the olefin-based monomer” contains only a monomer having no carboxyl group. object. 26. The coating composition according to claim 24, wherein the “monomer (a-2) other than the olefin monomer” is “vinyl acetate”. 27. The coating composition according to claim 17, wherein the acrylic polymer (B) comprises a polymer of an acrylic monomer (b). 28. The coating according to claim 27, wherein the “acrylic monomer (b)” contains at least a part of a monomer having a water solubility of 0.0 to 0.5%. Composition. 29. The coating composition according to claim 27, wherein the “acrylic monomer (b)” at least partially contains a monomer having no carboxyl group. 30. The coating composition according to claim 27, wherein the “acrylic monomer (b)” contains only a monomer containing no carboxyl group. 31. The acrylic monomer (b) contains at least a part of styrene and / or 2-ethylhexyl acrylate.
0. The coating composition according to any one of the above items. 32. The resin particles having a weight average particle diameter of 10 n
The coating composition according to any one of claims 17 to 31, wherein the coating composition has a particle size of m to 500 µm. 33. The method according to claim 17, wherein an initiator having a water solubility of 0 to 10% is used when polymerizing the acrylic monomer (b). Paint composition. 34. The coating composition for a polyolefin according to claim 1, wherein 35. A primer coating composition according to claim 1.