JP2005008728A - Acrylic plastisol composition and article obtained using the same - Google Patents

Abstract

[PROBLEMS] To provide an acrylic plastisol composition that can use a general-purpose plasticizer and can provide a molded product having excellent mechanical properties such as tensile strength and tear strength.
An acrylic plastisol composition comprising an acrylic polymer, an ethylenically unsaturated monomer and a polymerization initiator, wherein the acrylic polymer is 30 to 85% by mass of methyl methacrylate and 3 to 8 carbon atoms. An acrylic plastisol composition which is a copolymer of 70 to 15% by weight of a (meth) acrylic acid ester of alcohol and 0 to 20% by weight of another copolymerizable monomer.
[Selection figure] None

Description

【００３６】
表中の略号は、下記を意味する。
【００３７】
ＭＭＡ：メチルメタクリレート
ｎＢＭＡ：ｎ−ブチルメタクリレート
ｉＢＭＡ：ｉ−ブチルメタクリレート
ＭＡＡ：メタクリル酸
ＨＥＭＡ：２−ヒドロキシエチルメタクリレート
ＧＭＡ：グリシジルメタクリレート
【００３８】
［実施例１］
上記で得られたアクリル系重合体粉末（Ａ１）１００部に対し、可塑剤としてジイソノニルフタレート（ＤＩＮＰ）７５部、エチレン性不飽和単量体としてトリメチロールプロパントリメタクリレート（アクリエステルＴＭＰ、商品名、三菱レイヨン（株）製、）２５部、重合開始剤としてｔ−アミルパーオキシベンゾエート（ＫＤ−１、商品名、化薬アクゾ（株）製）０．２５部を添加し、ディスパーミキサーにて６０秒間混合攪拌し、さらに減圧脱泡（２０ｍｍＨｇで５分）を行って均一なプラスチゾル組成物を得た。
【００３９】
得られたプラスチゾルをテフロンコーティングした鉄板上に２ｍｍ厚に塗布し、１６０℃のオーブン中で２０分加熱し、プラスチゾルをゲル化させると同時に不飽和単量体を重合硬化して、塗膜を得た。得られた塗膜の引張破壊強さは１１．８ＭＰａであり、最大引裂荷重は２０．８Ｎ／ｍｍであり、良好な引張強度および引き裂き強度を示した。
【００４０】
［実施例２〜６、比較例１、２］
アクリル系重合体粉末、可塑剤、不飽和単量体および熱重合開始剤を表２に示す配合として、実施例１と同様の方法でプラスチゾル組成物を得た。
【００４１】
得られたプラスチゾル組成物を実施例１と同様の方法でゲル化及び硬化し、得られた塗膜の強度評価を行った。評価結果を表２に示した。これら実施例では、実施例１を上回る、特に良好な引張強度および引裂強度を示した。なお、不飽和単量体及び重合開始剤を用いない場合には、引張強度および引裂強度が不充分であり、重合開始剤を用いな場合には、引張強度は良好であったが、引裂強度が不充分であった。
【００４２】
［実施例７］
アクリル系重合体粉末、可塑剤、不飽和単量体および光重合開始剤を表２に示す配合として、実施例１と同様の方法でプラスチゾル組成物を得た。
【００４３】
得られたプラスチゾル組成物をテフロンコーティングした鉄板上に２ｍｍ厚に塗布し、１３０℃のオーブン中で５分加熱した。この塗膜を、ランプ高さ１５ｃｍの高圧水銀灯（８０ｗ／ｃｍ）により、積算光量２０００ｍＪ／ｃｍ^２のエネルギー量で硬化させた。得られた塗膜の強度評価を行った。評価結果を表２に示した。この塗膜も、特に良好な引張強度および引裂強度を示した。
【００４４】
【表２】

【００４５】
表中の配合部数は質量基準で示した。
表中の略号を以下に示す。
ＤＩＮＰ：ジイソノニルフタレート
ＰＰＧ：ポリプロピレングリコール（平均分子量７００）
ＴＣＰ：トリクレジルホスフェート
ＭＡＨ：無水マレイン酸
ＴＭＰ：トリメチロールプロパントリメタクリレート
ＥＨ：２−エチルヘキシルメタクリレート
Ｍ−３１５：イソシアヌール酸ＥＯ変性トリアクリレート
ＤＰＨＡ：ジペンタエリスリトールヘキサアクリレート
ＫＤ−１：ｔ−アミルパーオキシベンゾエート
ＡＮ：ｔ−アミルパーオキ−３，５，５−トリメチルヘキサノエート
Ｏ：ｔ−アミルパーオキシ−２−エチルヘキサノエート
ＣＰ−４：１−ヒドロキシシクロヘキシルフェニルケトン
【００４６】
【発明の効果】
本発明によれば、焼却時などに塩化水素ガスやダイオキシン等の物質を排出しないアクリル系重合体をベースとし、可塑剤、エチレン性不飽和単量体、重合開始剤等を配合したアクリル系プラスチゾル組成物を用いることで、引張強度や引裂強度の良好な塗膜が得られる。また、汎用で低コストの可塑剤を用いることもでき、その工業的利益および環境保全にもたらす効果は顕著である。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an acrylic plastisol composition, and more particularly to an acrylic plastisol composition from which a molded article having excellent mechanical properties such as tensile strength and tear strength can be obtained, and an article obtained using the plastisol.
[0002]
[Prior art]
At present, a plastisol composition in which a polymer powder is dispersed in a plasticizer, called a paste resin, widely used industrially, is a coating agent for automobiles, flooring materials, wallpaper, steel plates, etc. It is used for various purposes as a molding material for molding, dip molding, rotation molding and the like, and in particular, a vinyl chloride sol using a vinyl chloride resin as a polymer powder is widely used.
[0003]
However, the vinyl chloride resin has a problem that dioxins, which are highly toxic substances, are generated when incinerated at a low temperature. Therefore, for example, Patent Document 1 proposes an acrylic sol using an acrylic resin as a polymer powder as a plastisol composition that replaces a vinyl chloride sol without such problems.
[0004]
However, in recent years, the required performance for plastisols has been further increased, and in particular, it is required to improve the mechanical strength of molded products such as tensile strength and tear strength.
[0005]
Patent Document 2 proposes a plastisol composition comprising an acrylic copolymer resin, a plasticizer, and an acrylic monomer. However, when the acrylic copolymer resin in this invention is used, the plasticizer that can be used is limited. However, there is a problem that a general-purpose and low-cost plasticizer cannot be used, and that the tear strength is low and it cannot be applied to a molding method such as slush molding.
[0006]
[Patent Document 1]
JP-A-7-233299 [Patent Document 2]
JP-A-8-165398 [0007]
[Problems to be solved by the invention]
An object of the present invention is to provide a novel acrylic plastisol composition that solves the above-mentioned problems of the prior art, does not generate toxic gases during incineration, and has excellent mechanical properties of molded products.
[0008]
[Means for Solving the Problems]
As a result of intensive studies on the above problems, the present inventors have found that in an acrylic plastisol composition comprising an acrylic polymer, an ethylenically unsaturated monomer and a polymerization initiator as essential components, the acrylic polymer is methyl methacrylate. 30 to 85% by mass, 70 to 15% by mass of (meth) acrylic acid ester of alcohol having 3 to 8 carbon atoms and 0 to 20% by mass of other copolymerizable monomers It has been found that the mechanical properties of the molded product are greatly improved by using the system plastisol composition, and the present invention has been completed.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The acrylic plastisol composition of the present invention comprises an acrylic polymer, an ethylenically unsaturated monomer and a polymerization initiator as essential components.
[0010]
The acrylic polymer used in the present invention comprises 30 to 85% by mass of methyl methacrylate, 70 to 15% by mass of (meth) acrylic acid ester having 3 to 8 carbon atoms, and 0 to 20% by mass of other copolymerizable monomers. It is a copolymer. By using such an acrylic polymer copolymerized with a (meth) acrylic acid ester of a C3-C8 alcohol, compatibility with various plasticizers can be exhibited. It becomes possible to widen the width.
[0011]
Although it does not specifically limit as (meth) acrylic acid ester of C3-C8 alcohol used for this invention, n-butyl (meth) acrylate, i-butyl (meth) acrylate, t-butyl (meth) acrylate , (Meth) acrylates of linear or branched alkyl alcohols such as hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, octyl (meth) acrylate, and (meth) acrylates of cyclic alkyl alcohols such as cyclohexyl (meth) acrylate ) Acrylates and (meth) acrylates of aromatic alcohols such as benzyl (meth) acrylate.
[0012]
Other copolymerizable monomers include (meth) acrylates of linear alkyl alcohols such as ethyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, (poly) ethylene glycol di (meth) ), Polyfunctional (meth) acrylates such as propylene glycol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, and epoxy groups such as glycidyl (meth) acrylate Containing monomer, methacrylic acid, acrylic acid, itaconic acid, crotonic acid, maleic acid, fumaric acid, methacrylic acid 2-succinoloyloxyethyl-2-methacryloyloxyethyl succinic acid, methacrylic acid 2-malenoyloxyethyl-2 −Me Carboxyl group-containing monomers such as acryloyloxyethylmaleic acid, methacrylic acid 2-phthaloyloxyethyl-2-methacryloyloxyethylphthalic acid, and methacrylic acid 2-hexahydrophthaloyloxyethyl-2-methacryloyloxyethylhexahydrophthalic acid Sulfonic acid group-containing monomers such as allyl sulfonic acid, carbonyl group-containing (meth) acrylates such as acetoacetoxyethyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, etc. Hydroxyl group-containing (meth) acrylates, cyclic ether group-containing (meth) acrylates such as tetrahydrofurfuryl (meth) acrylate, N-dimethylaminoethyl (meth) acrylate, N-diethylaminoethyl Amino group-containing (meth) acrylates such as (meth) acrylate, diacetone acrylamide, N-methylol acrylamide, N-methoxymethyl acrylamide, N-ethoxymethyl acrylamide, N-butoxymethyl acrylamide and other derivatives thereof, urethane modified Acrylates, epoxy-modified acrylates, silicone-modified acrylates, and the like can be widely used, but are not limited to these exemplified monomers.
[0013]
The acrylic polymer is not particularly limited, but it is preferable to use a powdered polymer so that a uniform sol can be rapidly formed by mixing with a plasticizer or the like. As a method for producing the acrylic polymer powder, for example, various methods such as a method of spray-drying after emulsion polymerization and a fine suspension polymerization method can be applied.
[0014]
The acrylic polymer used in the present invention preferably has a multilayer structure such as a core / shell structure or a multistage structure. By introducing a multilayer structure into the acrylic polymer, it becomes easy to achieve both storage stability as a plastisol and heat film-forming properties. In this case, it is preferable that the inner layer portion excluding the outermost layer has a structure containing more (meth) acrylic acid ester component of alcohol having 3 to 8 carbon atoms. In the case of the core / shell structure, the core / shell ratio (mass ratio) is preferably 30/70 to 90/10, and more preferably 40/60 to 80/20.
[0015]
In the present invention, various plasticizers can be used as necessary. Various plasticizers can be used as long as they have the ability to plasticize acrylic polymers. Examples thereof include dialkyl phthalates such as dibutyl phthalate, dihexyl phthalate, dioctyl phthalate, diisononyl phthalate, and diisodecyl phthalate; Alkylbenzyl phthalates such as butylbenzyl phthalate; alkylaryl phthalates; dibenzyl phthalates; diaryl phthalates; or triaryl phosphates such as tricresyl phosphate, trialkyl phosphates, alkylaryl phosphates, etc. Furthermore, aliphatic dibasic acid esters such as adipine dibutyl; ether-containing compounds such as polyethylene glycol, polypropylene glycol, and dibutyl glycol adipate; polyester plasticizers, soybean oil plasticizers such as epoxidized soybean oil, etc. Raising It is. These plasticizers can be used alone or in combination of two or more plasticizers. The plasticizer is preferably used in an amount of 200 parts by mass or less with respect to 100 parts by mass of the acrylic polymer.
[0016]
As a plasticizer particularly preferable for use in the present invention, a plasticizer exhibiting compatibility with an acrylic polymer copolymerized at a composition ratio of methyl methacrylate / methacrylic acid = 95/5 (mass%) can be mentioned. “Compatible” as used herein means that a polymethyl methacrylate / methacrylic acid copolymer polymer having a weight average molecular weight of 600,000 to 800,000 produced by emulsion polymerization using potassium persulfate as an initiator and a plasticizer is 50 / After mixing at a ratio of 50 (mass%) and heating to form a film in an oven at 130 ° C. for 20 minutes, the film was cooled to room temperature and visually observed one day later. When there is no. Examples of such compatible plasticizers include linear or branched polyether plasticizers such as polyethylene glycol and polypropylene glycol, phosphate plasticizers such as tricresyl phosphate, diethylene glycol dibenzoate, Examples thereof include benzoate plasticizers such as dipropylene glycol dibenzoate. Among these, polypropylene glycol having a hydroxyl group at the terminal is particularly preferable in terms of developing coating film strength.
[0017]
In the acrylic plastisol of the present invention, it is necessary to blend an ethylenically unsaturated monomer and a polymerization initiator. This is because when an plastisol composition is used, the unsaturated monomer is polymerized and cured simultaneously with gelation or by further heating or light irradiation after gelation, and the mechanical strength of the molded product is greatly improved. It is because it can be made.
[0018]
The ethylenically unsaturated monomer used in the acrylic plastisol composition of the present invention is not particularly limited, and those exemplified as the monomer constituting the acrylic polymer described above are widely used alone or in combination of two or more. Can be used. Among them, polyfunctional acrylic monomers such as trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, and isocyanuric acid EO-modified tri (meth) acrylate may be used. preferable. These monomers have a high effect of improving the strength of the molded product and have a high boiling point, and therefore have low volatility during molding. The ethylenically unsaturated monomer is preferably used in the range of 5 to 200 parts by mass with respect to 100 parts by mass of the acrylic polymer.
[0019]
The polymerization initiator used in the acrylic plastisol composition of the present invention is not particularly limited, and is a curing method such as a thermal polymerization initiator such as an organic peroxide or an azo compound, a photopolymerization initiator such as benzophenone or acetophenone. Accordingly, various polymerization initiators can be used alone or in combination of two or more. The polymerization initiator is preferably used in the range of 0.1 to 5 parts by mass with respect to 100 parts by mass of the ethylenically unsaturated monomer.
[0020]
Moreover, various additives or additives can be mix | blended with the acrylic plastisol composition of this invention according to a use. For example, inorganic fillers such as calcium carbonate, aluminum hydroxide, baryta, clay, colloidal silica, mica powder, silica sand, diatomaceous earth, kaolin, talc, bentonite, glass powder, aluminum oxide; pigments such as titanium oxide and carbon black; minerals Diluting agents such as terpenes and mineral spirits; optional addition of antifoaming agents, antifungal agents, deodorants, antibacterial agents, surfactants, lubricants, UV absorbers, fragrances, foaming agents, leveling agents, adhesives, etc. Can do.
[0021]
As described above, the acrylic plastisol composition of the present invention can be gelled by heating and simultaneously polymerize and cure the unsaturated monomer to produce a molded product, or can be further heated or irradiated after gelation. By performing the polymerization, the unsaturated monomer can be polymerized and cured to produce a molded product.
[0022]
The acrylic plastisol composition of the present invention can be widely used in fields of application where a conventional vinyl chloride sol has been used. Specifically, automotive undercoats, automotive body sealers, automotive mastic adhesives, tile carpet backing materials, cushion floors, wallpaper, steel plate paints, toys, gloves, food samples, shoes, building materials, various adhesives, various sealers, Examples include, but are not limited to, gaskets, waterproof sheets, automobile inner layer skin materials, canvases, table cloths, synthetic leather, erasers, screen printing paints, and the like.
[0023]
【Example】
Hereinafter, the present invention will be described more specifically in accordance with examples. The evaluation described in the examples was performed by the following method. In the examples, “part” means “part by mass”.
[0024]
[Tensile strength of coating film]
The coating film obtained by curing the plastisol composition was cut into a dumbbell shape No. 2 to obtain a test piece, and the tensile fracture strength was measured according to JIS-K7113. The measurement conditions at this time were a test speed of 200 mm / min, a load cell rating of 980 N, and an environmental temperature of 25 ° C. The obtained strength was evaluated according to the following evaluation criteria.
A: 15.0 MPa or more ○: 10.0 MPa or more and less than 15.0 MPa ×: 10.0 MPa or less
[Tear strength of coating film]
The coating film obtained by curing the plastisol composition was peeled from the substrate and cut into a right-angle tear test piece to obtain a test piece, and the maximum tear load was measured according to JIS-K7128. The measurement conditions at this time were a test speed of 500 mm / min, a load cell rating of 980 N, and an environmental temperature of 25 ° C. The obtained strength was evaluated according to the following evaluation criteria.
A: 50.0 N / mm or more B: 20.0 N / mm or more and less than 50.0 N / mm x: less than 20.0 N / mm
[Preparation of acrylic polymer powder (A1)]
500 g of pure water was put into a 2 liter four-necked flask equipped with a thermometer, nitrogen gas inlet tube, stirring rod, dropping funnel, and cooling tube, and nitrogen gas was sufficiently bubbled for 30 minutes to dissolve dissolved oxygen in pure water. Was replaced. Next, after changing the nitrogen gas to flow, 15.0 g of methyl methacrylate and 15.0 g of n-butyl methacrylate were added, and the temperature was raised to 80 ° C. while stirring at 200 rpm. When the internal temperature reached 80 ° C., 0.3 g of potassium persulfate dissolved in 10 g of pure water was added to the flask all at once to initiate polymerization. Thereafter, stirring was continued at 80 ° C. for 60 minutes to obtain a seed particle dispersion. This polymerization is soap-free polymerization without using an emulsifier.
[0027]
Next, 250.0 g of methyl methacrylate, 250.0 g of n-butyl methacrylate, 5.0 g of sodium dioctyl sulfosuccinate, and 250.0 g of pure water were mixed and stirred into the obtained seed particle dispersion to be emulsified. The obtained monomer emulsion was added dropwise over 6 hours, followed by continuing stirring at 80 ° C. for 1 hour to obtain a polymer dispersion.
[0028]
The polymer dispersion was cooled to room temperature and then spray-dried with a spray dryer to obtain an acrylic polymer powder (A1). The drying conditions of the spray dryer were an inlet temperature of 170 ° C., an outlet temperature of 75 ° C., and an atomizer speed of 25000 rpm.
[0029]
[Preparation of acrylic polymer powder (A2)]
An acrylic polymer powder (A2) was prepared in the same manner as the preparation of the polymer powder (A1) except that the monomer composition of the monomer emulsion to be dropped was changed to 450.0 g of methyl methacrylate and 50.0 g of glycidyl methacrylate.
[0030]
[Preparation of acrylic polymer powder (A3)]
A seed particle dispersion was obtained in exactly the same manner as in the preparation of the acrylic polymer powder (A1). In this seed particle dispersion, 125.0 g of methyl methacrylate, 125.0 g of n-butyl methacrylate, and dioctylsulfosuccinic acid were obtained. A monomer emulsified liquid obtained by mixing and emulsifying 2.50 g of sodium and 125.0 g of pure water was added dropwise over 3 hours, followed by continuing stirring at 80 ° C. for 1 hour. A polymer dispersion was obtained.
[0031]
Next, 186.0 g of methyl methacrylate, 32.0 g of n-butyl methacrylate, 32.0 g of glycidyl methacrylate, 2.50 g of sodium dioctylsulfosuccinate, and 125.0 g of pure water were added to the obtained polymer dispersion. A monomer emulsion obtained by mixing and stirring to give an emulsion was added dropwise over 3 hours, followed by continuing stirring at 80 ° C. for 1 hour to obtain a core-shell polymer dispersion.
[0032]
After cooling this core-shell type polymer dispersion to room temperature, it was spray-dried with a spray dryer to obtain a polymer powder (A3).
[0033]
[Preparation of acrylic polymer powder (A4)]
The monomer composition of the monomer emulsion to be dropped has a core of 125.0 g of methyl methacrylate and 125.0 g of n-butyl methacrylate, a shell of 150.0 g of methyl methacrylate, 90.0 g of i-butyl methacrylate, 5.0 g of methacrylic acid, 2 -An acrylic polymer powder (A4) was prepared in the same manner as the acrylic polymer powder (A3) except that 5.0 g of hydroxyethyl methacrylate was used.
[0034]
Table 1 shows the particle structures of the acrylic polymer powders (A1) to (A4) obtained above.
[0035]
[Table 1]

[0036]
The abbreviations in the table mean the following.
[0037]
MMA: methyl methacrylate nBMA: n-butyl methacrylate iBMA: i-butyl methacrylate MAA: methacrylic acid HEMA: 2-hydroxyethyl methacrylate GMA: glycidyl methacrylate
[Example 1]
For 100 parts of the acrylic polymer powder (A1) obtained above, 75 parts of diisononyl phthalate (DINP) as a plasticizer and trimethylolpropane trimethacrylate (acrylic ester TMP, trade name) as an ethylenically unsaturated monomer (Mitsubishi Rayon Co., Ltd.) 25 parts, t-amyl peroxybenzoate (KD-1, trade name, manufactured by Kayaku Akzo Co., Ltd.) 0.25 part as a polymerization initiator was added and 60 parts were added using a disper mixer. The mixture was stirred for 2 seconds and further degassed under reduced pressure (5 mm at 20 mmHg) to obtain a uniform plastisol composition.
[0039]
The obtained plastisol is applied to a Teflon-coated iron plate to a thickness of 2 mm and heated in an oven at 160 ° C. for 20 minutes to gel the plastisol and simultaneously polymerize and cure the unsaturated monomer to obtain a coating film. It was. The obtained coating film had a tensile fracture strength of 11.8 MPa and a maximum tear load of 20.8 N / mm, indicating good tensile strength and tear strength.
[0040]
[Examples 2 to 6, Comparative Examples 1 and 2]
A plastisol composition was obtained in the same manner as in Example 1, except that the acrylic polymer powder, the plasticizer, the unsaturated monomer, and the thermal polymerization initiator were blended as shown in Table 2.
[0041]
The obtained plastisol composition was gelated and cured in the same manner as in Example 1, and the strength of the obtained coating film was evaluated. The evaluation results are shown in Table 2. In these examples, particularly good tensile strength and tear strength exceeding those of Example 1 were shown. When the unsaturated monomer and the polymerization initiator are not used, the tensile strength and the tear strength are insufficient. When the polymerization initiator is not used, the tensile strength is good, but the tear strength. Was insufficient.
[0042]
[Example 7]
A plastisol composition was obtained in the same manner as in Example 1, except that the acrylic polymer powder, the plasticizer, the unsaturated monomer, and the photopolymerization initiator were blended as shown in Table 2.
[0043]
The obtained plastisol composition was applied to a Teflon-coated iron plate to a thickness of 2 mm and heated in an oven at 130 ° C. for 5 minutes. This coating film was cured with a high-pressure mercury lamp (80 w / cm) having a lamp height of 15 cm with an energy amount of 2000 mJ / cm ² integrated light quantity. The strength evaluation of the obtained coating film was performed. The evaluation results are shown in Table 2. This coating also showed particularly good tensile strength and tear strength.
[0044]
[Table 2]

[0045]
The number of parts in the table is shown on a mass basis.
Abbreviations in the table are shown below.
DINP: diisononyl phthalate PPG: polypropylene glycol (average molecular weight 700)
TCP: tricresyl phosphate MAH: maleic anhydride TMP: trimethylolpropane trimethacrylate EH: 2-ethylhexyl methacrylate M-315: isocyanuric acid EO-modified triacrylate DPHA: dipentaerythritol hexaacrylate KD-1: t-amylper Oxybenzoate AN: t-amylperoxy-3,5,5-trimethylhexanoate O: t-amylperoxy-2-ethylhexanoate CP-4: 1-hydroxycyclohexyl phenyl ketone
【The invention's effect】
According to the present invention, an acrylic plastisol based on an acrylic polymer that does not discharge a substance such as hydrogen chloride gas or dioxin at the time of incineration, and which contains a plasticizer, an ethylenically unsaturated monomer, a polymerization initiator, etc. By using the composition, a coating film having good tensile strength and tear strength can be obtained. In addition, a general-purpose and low-cost plasticizer can be used, and the effect on industrial benefits and environmental conservation is remarkable.

Claims (4)

In the acrylic plastisol composition comprising an acrylic polymer, an ethylenically unsaturated monomer and a polymerization initiator as essential components, the acrylic polymer is an alcohol having 3 to 8% by weight of methyl methacrylate and 3 to 8 carbon atoms. An acrylic plastisol composition comprising 70 to 15% by weight of (meth) acrylic acid ester and 0 to 20% by weight of another copolymerizable monomer. The plastisol composition according to claim 1, wherein the acrylic polymer has a multilayer structure. The plastisol composition according to claim 1 or 2, wherein a plasticizer exhibiting compatibility with an acrylic polymer copolymerized at a composition ratio of methyl methacrylate / methacrylic acid = 95/5 (% by mass) is used. An article obtained by curing the plastisol composition according to any one of claims 1 to 3.