JPH05179160A - Antistatic covering material composition - Google Patents

Abstract

PURPOSE:To obtain the title composition capable of forming a cross-linked hardened film excellent in abrasion resistance, chemical resistance, durability, weatherability and antistatic properties by using colloidal silica, an organoalkoxysilane and a polyfunctional acrylate as the principal constituents and adding a specified antistatic agent thereto. CONSTITUTION:The title composition consists of colloidal silica comprising silica particles having a primary particle diameter of 1-200mum, an organoalkoxysilane, a polyfunctional monomer containing at least three (meth) acryloyloxy groups in the molecule, and a quaternary ammonium salt of formula I [wherein X is a group of, e.g. formula II, III or IV, or a (substituted) monovalent hydrocarbon group; R<1> is a (substituted) monovalent hydrocarbon group; Y<-> is anion; R<2> and R<4> are each H or a monovalent hydrocarbon group; R<3>, R<5> and R<6> are each a (substituted) divalent hydrocarbon group; and a is 1 or 2]. By applying this composition to a synthetic resin molding and irradiating with actinic radiation, a hardened coating film having permanent antistatic properties and abrasion resistance and excellent transparency, adhesion to a base material, chemical resistance, etc., can be formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating material composition capable of forming a crosslinked cured film excellent in abrasion resistance, chemical resistance, durability, weather resistance and antistatic property.

[0002]

2. Description of the Related Art Synthetic resin moldings such as polymethylmethacrylate resin, polycarbonate resin and polyarylate resin are not only lighter in weight and superior in impact resistance than glass, but also inexpensive. It has various advantages such as easy molding and is widely used in many fields by taking advantage of these advantages. For example, it is used for glazing of automobiles, buses, aircrafts, etc., headlamp lenses, corner lenses, lenses such as fog lamps, lenses for spectacles and optical devices, automobile meter panels, etc. .

However, since the surface hardness of these synthetic resin molded products is insufficient, contact with other objects, impact, and the like during transportation of the molded product, attachment of parts, or use.
There is a strong demand for improving the wear resistance of the surface because the surface is likely to be damaged by scratches and the like, the product yield is lowered, the aesthetic appearance is impaired, and the product becomes unusable in a short time. In addition, since these synthetic resin molded products have high electrical insulation, static electricity is generated by friction, contact, etc., and they become charged, so that dust easily adheres to the surface of the molded product, which causes scratches and is aesthetically pleasing. Not only is it damaged, but it also has an adverse effect such as malfunction on electronic circuits and the like in the vicinity thereof.

Various methods have been hitherto used for improving the drawbacks of such synthetic resin molded articles. For example, a polyfunctional monomer having two or more (meth) acryloyloxy groups in one molecule. An ionic compound, such as an anionic, cationic or amphoteric surfactant, is added to a coating composition containing as a main component, the coating is applied to the surface of a synthetic resin molded article, and ultraviolet rays are applied to form a cured film. A method of improving wear resistance and antistatic property of a synthetic resin molded product by forming the same has been proposed.

[0005]

However, the coating composition of the above method has the following problems. First, there is a problem that abrasion resistance and antistatic property are not compatible with each other. When the added amount of the surfactant is small, the wear resistance is excellent, but the performance of antistatic property is insufficient. Conversely, when the added amount of the surfactant is large, the antistatic property is excellent, but the wear resistance is poor. Will be enough. Also, as the amount of surfactant added increases,
It is difficult to form a practical cured film because the transparency and the adhesiveness also decrease. The second is the issue of durability. It is desirable that the antistatic effect lasts semi-permanently. Especially, the antistatic effect is deactivated in repeated washing with water, and in a harsh environment (temperature and humidity), and the transparency and adhesion are improved. It is not preferable to decrease. The coating composition of the above disclosure has insufficient durability, and deterioration in antistatic property, transparency, and adhesion are observed, and therefore the durability has not reached a practical level. In view of the above problems, the present invention is a coating capable of forming a cured coating film having excellent permanent antistatic property, abrasion resistance, durability, transparency, substrate adhesion, weather resistance, and chemical resistance. An object is to provide a wood composition.

[0006]

Means for Solving the Problems The inventors of the present invention have made earnest studies on compatibility of wear resistance and antistatic property and improvement of durability. As a result, colloidal silica, organoalkoxysilane and polyfunctional acrylate are used as main components. The inventors have found that the above-mentioned problems can be solved by using a coating composition containing a specific antistatic agent added thereto, and have completed the present invention.

That is, according to the present invention, (A) the primary particle size is 1
Colloidal silica consisting of silica particles of 200 to 200 millimicrons, (B) an organoalkoxysilane, (C) a polyfunctional monomer having three or more acryloyloxy groups and / or methacryloyloxy groups in one molecule, and (D) a quaternary ammonium salt represented by the following formula [I],

[0008]

[Chemical 3]

[Wherein X is

[0010]

[Chemical 4]

And R ¹ is a substituted or unsubstituted monovalent hydrocarbon group, R ¹ is a substituted or unsubstituted monovalent hydrocarbon group, and Y is an anion. R ² and R ⁴ are a hydrogen atom or a monovalent hydrocarbon group, R ³ , R ⁵ , R ⁶ , R ⁷ and R
⁸ , R ⁹ , R ¹⁰ and R ¹² are substituted or unsubstituted divalent hydrocarbon groups, R ¹¹ is a monovalent hydrocarbon group, and a is an integer of 1-2. ] It is an antistatic coating material composition characterized by being comprised.

The antistatic coating material composition described above is applied to the surface of a synthetic resin molded article and irradiated with active energy rays to obtain a wear-resistant and chemical-resistant coating having a crosslinked cured coating with a thickness of 1 to 30 μm. It is possible to obtain a synthetic resin molded product having excellent properties, durability, weather resistance, and antistatic property. The present invention will be described in detail. First, each component of the antistatic coating material composition of the present invention will be described.

About Component (A) The component (A), colloidal silica composed of silica particles having a primary particle size of 1 to 200 millimicrons, is generally an ultrafine colloidal solution of silicic acid anhydride using a dispersion medium. is there. Further, powdery colloidal silica containing no dispersion medium can also be used in the present invention. As a dispersion medium of colloidal silica, alcohols such as water, methanol, ethanol, iso-propyl alcohol, n-butyl alcohol and n-propyl alcohol; ethylene glycol, etc. Polyhydric alcohols; polyhydric alcohol derivatives such as ethyl cellosolve and butyl cellosolve; ketones such as methyl ethyl ketone and methyl isobutyl ketone; 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, tetrahydroflur There are polymerizable monomers such as furyl acrylate and general organic solvents, but in the present invention, alcohols having an alkyl group of 1 to 4 carbon atoms are preferable.

As these colloidal silica, those produced by a well-known method and commercially available can be used. For example, water-dispersed colloidal silica (trade name, Snowtex), methanol-dispersed colloidal silica (trade name; methanol-silica sol), isopropyl alcohol-dispersed colloidal silica, which are commercially available from Nissan Chemical Industries, Ltd. (Trade name: IPA-ST)
Dispersed colloidal silica of methanol (trade name; OSCAL1132), colloidal silica of dispersed iso-propyl alcohol (trade name; OSCAL1)
432), powdery colloidal silica (trade name; OSCA
P) etc. can be mentioned.

It is preferable to use particles having a particle size of 1 to 200 mm, particularly preferably 5 to 80 mm. If the particle size is less than 1 millimicron, it is difficult to obtain a product with a poor dispersion and constant quality, and if it exceeds 200 millimicron, the transparency of the film is poor and only turbidity is large. I can't get it. Although the colloidal silica of the present invention is available in an acidic or basic form, it is more preferable to use the acidic form in the method for producing the coating composition of the present invention.

The component (A) is an essential component for achieving both wear resistance and antistatic property of the cured film and improving durability.
By using the component (A), even if the component (D) is added in a relatively large amount, it is possible to obtain excellent antistatic property without lowering the abrasion resistance, transparency and adhesion. Further, there is no deterioration in antistatic property, transparency and adhesion after the hot water resistance test and the humidity resistance test, and an excellent effect is also obtained in improving the durability. When the component (A) is not used, only a turbid cured film is obtained, and the antistatic property after the hot water resistance test and the humidity resistance test is significantly reduced, so that it cannot reach a practical level. (A)
The proportion of the components used is 5 to 50% by weight based on 100% by weight of the coating material composition, as the content of silica fine particles containing no dispersion medium.
Is preferred. When it is used in excess of 50% by weight, cracks are observed in the cured film, and when it is less than 5%, abrasion resistance, transparency and antistatic property are insufficient.

Component (B) The organoalkoxysilane of component (B) is specifically represented by the following general formula [II]. _{^{(R 13) a -Si- (OR}} 14) 4-a (II) (wherein, R ¹³ is a substituted or unsubstituted monovalent hydrocarbon group, a phenyl group, an amino group, a methacryloxy group, an acryloxy group, a glycidyl A group, a mercapto group, a vinyl group, a hydroxyl group, an isocyanate group, a hydrogen atom, a halogen atom, and a substituted or unsubstituted divalent hydrocarbon group is S.
It may be bonded to the i atom. R ¹⁴ represents a substituted or unsubstituted monovalent hydrocarbon group, and a represents an integer of 0 to 3. )

Specific examples of the component (B) include tetramethoxysilane, tetraethoxysilane, tetra-isopropoxysilane (compound in which a is 0), methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxysilane, ethyl. Triethoxysilane, n-butyltrimethoxysilane, n-hexyltrimethoxysilane, n
-Dodecyltriethoxysilane, γ- (2aminoethyl) aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, γ-methacryloxypropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-mercaptopropyl Trimethoxysilane, vinyltrimethoxysilane, γ-chloropropyltrimethoxysilane, 3,3,3-trifluoropropyltrimethoxysilane, γ-hydroxypropyltrimethoxysilane, γ-isocyanatopropyltrimethoxysilane (a is 1 compound), dimethyldimethoxysilane, phenylmethyldimethoxysilane, dimethyldiethoxysilane, diphenyldiethoxysilane, diphenyldimethoxysilane, methyldiethoxysilane, phenylmethyldiethoxysilane , N- (β-aminoethyl)
-Γ-aminopropylmethyldimethoxysilane, γ-chloropropylmethyldimethoxysilane, γ-glycidoxypropylmethyldiethoxysilane, γ-mercaptopropylmethyldimethoxysilane, vinylmethyldiethoxysilane (a compound of 2), trimethyl Examples thereof include methoxysilane, trimethylethoxysilane, triethylmethoxysilane, and triethylethoxysilane (a compound having a of 3).

The coating composition may be prepared by adding the component (B) as it is, or in the presence of the component (B), water and an effective amount of a hydrolysis catalyst such as hydrochloric acid, the temperature may range from room temperature to reflux temperature. It may be added in a hydrolyzed state by a conventional method such as stirring at a temperature of up to The component (B) is
It mainly improves the transparency and durability of the cured film while interacting with the component (A). Therefore, when the component (B) is not used, only a cloudy film is obtained and the transparency is inferior, and after the hot water resistance test, a decrease in antistatic property, adhesion, and an increase in cloudiness are observed. The proportion of the component (B) used is preferably 1 to 30% by weight based on 100% by weight of the coating material composition. If it is used in an amount of more than 30% by weight, the abrasion resistance is lowered.

Component (C) The polyfunctional monomer having three or more acryloyloxy groups and / or methacryloyloxy groups in one molecule of the component (C) is manufactured by a known method and is commercially available. For example, polyol poly (meth) acrylate
Polyester poly (meth) acrylate, epoxy poly (meth) acrylate, urethane poly (meth) acrylate, polyether poly (meth) acrylate, melamine poly (meth) acrylate, alkyd poly Examples thereof include (meth) acrylate and silicon poly (meth) acrylate, and the compounds described in "UV, EB Curing Handbook-Raw Materials- (Polymer Publishing Association)" can be used.

Among the above, trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, tris [(meth) acryloxyethyl] isocyanurate, ditrimethylolpropane tetra (meth) acrylate Acrylate, pentaerythritol tetraacrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, dibasic acid and trivalent or tetravalent alcohol Polyester synthesized from and (meth) acrylic acid,
Tetrapenta or hexa (meth) acrylate, polyisocyanate and hydroxyl group-containing (meth) acrylate
It is preferable to use urethane, tri-, tetra-, penta- or hexa (meth) acrylate synthesized from These monomers may be used alone or in combination of two or more.

The component (C) interacts with the other components (A) and (B), and mainly imparts wear resistance, toughness, and flexibility to the cured film, and Prevents cracking and improves adhesion. Therefore, when the component (C) is not used, not only sufficient adhesion cannot be obtained, but
Since cracking is observed in durability tests such as a hot water resistance test, it is difficult to form a more practical cured film.
Among the components (C), dipentaerythritol-pentaacrylate and dipentaerythritol-hexaacrylate are particularly preferable because they are excellent in the above-mentioned effects and air curability. The proportion of the component (C) used is preferably 30 to 80% by weight based on 100% by weight of the coating material composition. 80
If it is used in excess of weight%, the antistatic property will decrease.

Regarding the component (D), the component (D) is a quaternary ammonium salt represented by the general formula [I], and the anion represented by Y to its counter ion is fluorine, chlorine, bromine, iodine or the like. And a halogen atom, an alkylsulfate group, an alkylphosphate group, or the like. Specific examples of the component (D) include dodecyltrimethylammonium chloride, coconut oil alkyltrimethylammonium chloride, hexadecyltrimethylammonium chloride, octadecyltrimethylammonium chloride, hardened tallow alkyltrimethylammonium chloride, docosenyltrimethylammonium chloride, coconut oil alkyl. Dimethylbenzylammonium chloride, tetradecyldimethylbenzylammonium chloride, octadecyldimethylbenzylammonium chloride, coconut oil alkyldimethylbenzylammonium chloride, polyoxyethylene dodecylmonomethylammonium chloride, methacrylamidopropyltrimethylammonium chloride, methacryloyloxyethyl trimethyl Le ammonium chloride, glycidyl trimethyl ammonium chloride,
2-hydroxy-3-methacryloxypropyl trimethyl ammonium chloride etc. can be mentioned.

The component (D) is composed of other components (A), (B),
It is a component that mainly imparts antistatic property to the cured film while interacting with the component (C). The quaternary ammonium salt-based compound as the component (D) has been used for coatings for the purpose of imparting antistatic property, but it is inferior in durability and does not undergo antistatic curing after water resistance and humidity resistance test. There are problems that it is greatly reduced, it is difficult to form a film having excellent transparency, and the adhesiveness to a molded article substrate is not sufficient.
However, although the quaternary ammonium salt-based compound has such problems, (A), (B) and (C) of the present invention
When used in combination with the components, it becomes possible to form a cured film having excellent antistatic property, transparency, and adhesion, and having excellent durability after the hot water resistance and humidity resistance test, which does not reduce antistatic property. Therefore, in the present invention, the above (A), (B) and (C)
If any one of the components is lacking, satisfactory performance cannot be obtained.

Among the component (D), a (meth) acryloxy group-containing quaternary ammonium salt such as methacryloxyethyltrimethylammonium chloride or 2-hydroxy-3-methacryloxypropyltrimethylammonium chloride is particularly preferable because of its excellent durability. It is a compound. The use ratio of the component (D) is preferably 1 to 10% by weight in 100% by weight of the coating material composition. When it is used in an amount exceeding 10% by weight, abrasion resistance may decrease.

When ultraviolet rays are used as active energy rays in forming a cured film with the coating material composition of the present invention, a slight amount of a photopolymerization initiator is added to the coating composition in consideration of practical curing. It is preferable to add it. The photopolymerization initiator is not particularly limited, and for example, the compounds described in "UV, EB Curing Handbook-Raw Materials- (Polymer Publishing Association)" are used, but the solubility in the coating material composition, the film formation Select in consideration of corrosion resistance and weather resistance. The addition amount is preferably in the range of 0.1 to 5 parts by weight with respect to 100 parts by weight of the coating material composition.

Further, the coating material composition of the present invention may optionally contain vinyl monomers; stabilizers such as UV absorbers, light stabilizers, antioxidants and thermal polymerization inhibitors; leveling agents, defoaming agents. , Thickener, anti-settling agent, pigment dispersant, antistatic agent,
An appropriate amount of surfactants such as an antifogging agent; a curing catalyst selected from acids, alkalis, salts and the like; pigments, dyes and the like may be blended and used. Uniform solubility of coating material composition, dispersion stability,
An organic solvent may be blended in the coating material composition from the viewpoints of adhesion to the substrate, smoothness of the film, uniformity, and the like. The organic solvent is not particularly limited, and one that can satisfy the desired performance aspects as described above may be used.
Further, two or more kinds of organic solvents may be used in combination. The amount of the organic solvent used is 0 to 2,000 parts by weight with respect to 100 parts by weight of the coating material composition. The amount used is 2,0
If it exceeds 100 parts by weight, only a thin film can be obtained, and the abrasion resistance becomes insufficient.

Further, by incorporating a monomer having not more than 2 (meth) acryloyloxy groups in one molecule into the coating material composition, the desired performance as described above can be obtained like the organic solvent. Satisfaction and flexibility in the cured film,
It is also possible to add flexibility. Examples of such a monomer include 2-ethylhexyl acrylate, cyclohexyl acrylate, 2-hydroxyethyl acrylate, tetrahydrofurfuryl acrylate, 2-ethoxyethyl acrylate, polyethylene glycol. − Lumono (meta)
Preferred are mono (meth) acrylates such as acrylate, di (meth) acrylates such as polyethylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate, and the like.

As a method of using the coating material composition of the present invention described in detail above and supplying it to the surface of a molded article, there are dip coating, brush coating, flow coating, spray coating, spin coating and the like. Of these, the dip coating method is preferable from the viewpoint of coating workability of the coating material composition, the smoothness and uniformity of the film, and the spray coating method is preferable from the viewpoint of adaptability to the shape of the molded product. The amount of the coating material composition to be supplied may be appropriately adjusted and supplied so that the film thickness of the cured film is in the range of 1 to 30 μm, preferably 2 to 10 μm.

Next, as a method of curing the coating material composition supplied to the surface of the molded article, active energy such as electron beam, α ray, β ray, γ ray extracted from an electron beam accelerator of 20 to 2,000 KV is used. -A curing method of irradiating a ray is also possible,
Wavelength 100-400n from the point that it can be easily cured economically
It is preferable to use m ultraviolet rays. As the ultraviolet ray source, it is preferable to use an ultraviolet lamp from the viewpoint of practicality and economy, and specific examples of this ultraviolet lamp include:
Examples include low-pressure mercury lamps, medium-pressure mercury lamps, high-pressure mercury lamps, ultra-high-pressure mercury lamps, xenon lamps, and metal halide lamps. The atmosphere for curing by irradiating ultraviolet rays may be normal air, nitrogen,
It does not matter even in an inert gas such as argon. For the purpose of improving the adhesiveness of the coating, heat treatment may be performed at a temperature not higher than the heat deformation temperature of the molded product using infrared rays or a hot air drying oven before the irradiation with ultraviolet rays.

Synthetic resins to be coated with the coating material composition of the present invention are various thermoplastic resins and thermosetting resins which have been conventionally required to have improved wear resistance, scratch resistance and antistatic property. Is. Examples of such a resin include polymethylmethacryl resin, polycarbonate resin, polyallyl diglycol carbonate resin, polystyrene resin, AB.
Examples thereof include S resin, AS resin, polyamide resin, polyarylate resin, and polymethacrylimide resin. Examples of these molded products include sheet-shaped molded products, film-shaped molded products, and various injection molded products. Among these molded products, molded products such as polymethylmethacryl resin, polycarbonate resin, and polymethacrylimide resin are often used as transparent materials because of their excellent transparency, and also wear resistance and scratch resistance. Since there is also a strong demand for improvement in electrical property and antistatic property, the coating material composition of the present invention can be applied particularly effectively.

[0032]

EXAMPLES The present invention will be described in more detail with reference to Examples and Comparative Examples below. In addition, all "parts" in Examples mean "parts by weight". The measurement and evaluation in the examples were carried out by the following methods. (1) Appearance of cured film The appearance of the composition after coating and curing was visually evaluated. The case where the surface was smooth and transparent was marked with ◯, the case where there was some cloud was marked with Δ, and the case where whitening or cloud was observed was marked with x.

(2) Abrasion resistance A # 000 steel wheel was attached to the tip of a cylinder having a diameter of 25 mm, and brought into contact with a horizontally placed sample surface to reach 1 kg.
After being reciprocally worn 50 times under the load, the diffuse transmittance (haze value) was measured to determine the wear resistance. The criteria for wear resistance are as follows. ◯ ... Increased haze value = 0 to 0.5: Almost no scratches. Δ: Increased haze value = 0.5 to 3.0: Slightly scratched. X ... Increased haze value = 3.0 or more: severely scratched.

(3) Adhesiveness Cross-cuts reaching the base material at 1 mm intervals were placed in the cured coating to make 100 1 mm ² cross-cuts, and then a sero tape was affixed to the cross-cuts and peeled off rapidly. Counted. The case where there was no peeling was rated as ◯, the number of peeling was 1 to 50, and the case where the number of peeling was 51 to 100 was rated as x. (4) Surface resistance value The coated sample was left in an atmosphere of 20 ° C. and a humidity of 65% for 24 hours, and then, in this atmosphere, a surface resistance measuring instrument (manufactured by ADVANTEST CORPORATION, Himeguome Meter, TR-860).
1, an applied voltage of 500 V) was used and measured in accordance with JIS K6911.

(5) Moisture resistance After the coated sample was left in an atmosphere of 60 ° C. and a humidity of 95% for 240 hours, changes in appearance, surface resistance and adhesion of the cured film were evaluated. (6) Light resistance A sunshine carbon bomb weatherometer (manufactured by Suga Test Instruments Co., Ltd., WEL-SUN-HC-B type) weather resistance tester was used and tested under conditions of black panel temperature 63 ± 3 ° C., no rainfall and continuous irradiation. did. Changes in the appearance, surface resistance value, and adhesiveness of the cured film after 500 hours were evaluated.

Examples 1 to 8 and Comparative Examples 1 to 7 The coating material compositions shown in Tables 1 and 2 were prepared. Polymethylmethacrylate resin injection molded plate 3 using this coating material composition
mm thickness, 100 × 100 mm [Product name Acrypet VH
-VH00, color tone clear, manufactured by Mitsubishi Rayon Co., Ltd.] to form a film, and then 10 at room temperature.
Let stand for a minute to evaporate the solvent. Then, this is irradiated with ultraviolet rays of 1000 mg / cm ² (ultraviolet integrated energy amount of wavelength 320 to 380 nm) using a high pressure mercury lamp in an air atmosphere, and a wear-resistant polymethylmethacrylic resin injection-molded plate having a cured film thickness of 4 to 5 μm. Got The obtained results are shown in Tables 1 and 2.

[0037]

[Table 1]

[0038]

[Table 2]

The symbols of the compounds in the table are as follows. DPHA: dipentaerythritol rupentaacrylate ODM: methacryloxyethyltrimethylammonium chloride BiP: benzoinisopropyl ether BNP: benzophenone B-1: γ-methacryloxypropyltrimethoxysilane B-2: γ-glycidoxypropyl Trimethoxysilane B-3: Tetramethoxysilane B-4: Methyltrimethoxine B-5: Dimethyldimethoxysilane B-6: Trimethylmethoxysilane

[0040]

The coating composition of the present invention comprises the above-mentioned components (A), (B), (C) and (D) in combination.
By irradiating with rays, it is possible to form a cured coating having permanent antistatic property, abrasion resistance, transparency, adhesiveness with a substrate, chemical resistance, and weather resistance, and especially polymethylmethacrylate. It can be effectively applied to the surface treatment of molded articles such as methacrylic resin, polycarbonate resin, and polymethacrylimide resin which require transparency.

Continuation of front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location // C08F 2/44 MCP 7442-4J 299/02 MRR 7442-4J

Claims (1)

[Claims] 1. A colloidal silica comprising (A) silica particles having a primary particle diameter of 1 to 200 millimicrons, (B) an organoalkoxysilane, and (C) three or more acryloyloxy groups and / or meta groups in one molecule. A polyfunctional monomer having an acryloyloxy group, and (D) a quaternary ammonium salt represented by the following formula [I]: [In the formula, X is And a substituted or unsubstituted monovalent hydrocarbon group, R ¹ is a substituted or unsubstituted monovalent hydrocarbon group,
Y ~ is an anion. R ² and R ⁴ are a hydrogen atom or a monovalent hydrocarbon group, R ³ , R ⁵ , R ⁶ , R ⁷ , R ⁸ , R ⁹ ,
R ¹⁰ and R ¹² are substituted or unsubstituted divalent hydrocarbon groups, R ¹¹ is a monovalent hydrocarbon group, and a is an integer of 1-2. ] An antistatic coating material composition comprising: