JP3092025B2 - Antistatic coating material composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to abrasion resistance, chemical resistance,
The present invention relates to a coating composition capable of forming a crosslinked cured film having excellent durability, weather resistance and antistatic properties.

[0002]

2. Description of the Related Art Synthetic resin molded products such as polymethyl methacrylate resin, polycarbonate resin and polyarylate resin are not only lightweight and excellent in impact resistance but also inexpensive as compared with glass. It has various advantages such as easy molding process, and is widely used in many fields by utilizing these advantages. For example, it is used for glazing of cars, buses, aircrafts, etc., lenses such as headlamp lenses, corner lenses, fog lamps, lenses for spectacles and optical devices, and automotive meter panels. .

[0003] However, these synthetic resin molded products have insufficient surface hardness, so that they may come into contact with other objects, impact, etc. during transportation of the molded products, mounting of parts or during use.
Since the surface is easily damaged by scratches and the like, the product yield is lowered, the appearance is impaired, and the surface becomes unusable in a short time. Therefore, it is strongly required to improve the wear resistance of the surface. In addition, since these synthetic resin molded products have high electrical insulation, static electricity is generated due to friction, contact, etc., and they are charged, so that dust easily adheres to the surface of the molded product, which causes scratches and aesthetic appearance. Not only is it damaged, but it also has adverse effects such as malfunctions on electronic circuits and the like close to them.

There have been various methods 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 has been proposed. An ionic compound, for example, an anionic, cationic or amphoteric surfactant is added to a coating composition containing as a main component, and the coating is applied to the surface of a synthetic resin molded article, and irradiated with ultraviolet rays to form a cured film . A method of improving the wear resistance and antistatic property of a synthetic resin molded article by forming the same has been proposed.

[0005]

However, the coating composition of the above method has the following problems. One problem is that wear resistance and antistatic properties cannot be compatible. When the addition amount of the surfactant is small, the abrasion resistance is excellent, but the performance regarding the antistatic property is insufficient. Conversely, when the addition amount is large, the antistatic property is excellent, but the abrasion resistance is not good. Will be enough. Also, as the amount of surfactant added increases,
It is difficult to form a practical cured film because the transparency and adhesion are also reduced.

[0006] The second problem is durability. It is desirable that the antistatic effect lasts semi-permanently. In particular, the antistatic effect can be deactivated in repeated washing with water and in harsh environments (temperature and humidity), and transparency and adhesion can be reduced. It is not preferable to decrease. The coating composition of the above disclosure has insufficient durability and lowers the antistatic property, transparency, and adhesion, and thus does not reach a practical level of durability.

The present invention has been made in view of the above background, and has as its object to provide abrasion resistance, chemical resistance, durability, weather resistance, and adhesion to a substrate surface. An object of the present invention is to provide an antistatic coating material composition capable of forming an excellent crosslinked cured film having excellent antistatic properties and permanent antistatic properties.

[0008]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies on compatibility between abrasion resistance and antistatic properties and improvement of durability. As a result, colloidal silica, specific organoalkoxysilane, polymerizable (meth) acrylic Coating, a coating material composition containing a specific ratio of an antistatic agent and an active energy ray-sensitive catalyst is applied to a synthetic resin molded article, and cured by irradiation with active energy rays to provide transparency, abrasion resistance, The present inventors have found that a synthetic resin molded article having excellent antistatic properties and durability can be obtained, and have completed the present invention.

That is, the present invention provides: (A) 5 to 50 parts by weight of colloidal silica composed of silica particles having a primary particle diameter of 1 to 200 mm; (B) a general formula (R ¹ ) _a -Si- (OR ² ) ) _4-a
[I] (wherein R ¹ and R ^{2 each} represent a monovalent hydrocarbon group having 1 to 6 carbon atoms, which may be the same or different, and a represents an integer of 1 to 3). Alkoxysilane 1-4
0 parts by weight, (C) 20 to 80 parts by weight of a polymerizable monomer having at least one acryloyloxy group and / or methacryloyloxy group in one molecule, (D) an alkyl quaternary ammonium salt, an alkyl phosphate,
Polyhydric alcohol having ethylene oxide chain, metal alkoxide, acetylacetone metal complex, metal thiocyanate, metal halide, metal ultrafine particle, conductive semiconductor ultrafine particle, conductive polymer, and poly (meth) acrylic acid and its salt 1 to 20 parts by weight of at least one kind of an antistatic agent selected from the group consisting of: (E) 0.1 to 10 parts by weight of an active energy ray-sensitive catalyst;
(However, the total amount of A, B, C, D and E is 1
00 parts by weight. ) Is an antistatic coating composition.

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

Component (A) Colloidal silica composed of silica particles having a primary particle size of 1 to 200 millimicrons, which is component (A), is generally a finely divided colloidal solution of silicic anhydride using a dispersion medium. is there. Further, powdery colloidal silica containing no dispersion medium can be used in the present invention. Examples of the dispersion medium of colloidal silica include alcohols such as water, methanol, ethanol, isopropyl alcohol, n-butyl alcohol and n-propyl alcohol; ethylene glycol and the like. 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 and tetrahydrofuran There are polymerizable monomers such as furyl acrylate and general organic solvents. In the present invention, alcohols having 1 to 4 carbon atoms in the alkyl group are preferred.

As these colloidal silicas, commercially available ones manufactured by a known method can be used. For example, water-dispersed colloidal silica (trade name, Snowtex), methanol-dispersed colloidal silica (trade name: methanol silica sol), and isopropyl alcohol-dispersed colloidal silica (trade name: IPA-) commercially available from Nissan Chemical Industries, Ltd. ST) and others, and Catalysis Chemical Co., Ltd.
Methanol-dispersed colloidal silica (trade name: OSCAL1132), iso-propyl alcohol-dispersed colloidal silica (trade name: OSCAL1)
432), powdered colloidal silica (trade name: OSCA)
P) and the like. It is preferable to use one having a particle size of 1 to 200 mm, particularly 5 to 8 mm.
It is preferably 0 millimicron. Which particle size is less than 1 millimeter micron is difficult to obtain those predetermined dispersion state is poor in quality, also only having a large turbidity deteriorates the transparency of the film is about what exceeding 200 millimicrons I can't get it. The colloidal silica of the present invention is available in acidic or basic form,
In the method of producing the coating composition, it is more preferable to use an acidic form.

The component (A) is an essential component for achieving both abrasion resistance and antistatic properties 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 properties without lowering abrasion resistance, transparency and adhesion. In addition, there is no decrease in antistatic property, transparency and adhesion after the hot water test and the humidity test, and an excellent effect is obtained in improving 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 moisture resistance test is significantly reduced, so that the cured film cannot reach a practical level.

The proportion of the component (A) used is 5 to 50% by weight, more preferably 10 to 40% by weight, based on 100% by weight of the coating composition, as the content of the silica fine particles containing no dispersion medium. When used in an amount exceeding 50% by weight, cracks are observed in the cured film. When the amount is less than 5%, abrasion resistance, transparency and antistatic properties are insufficient.

Regarding the component (B) The organoalkoxysilane represented by the general formula [I], which is the component (B), comprises the inorganic component (A) and the organic components (C), (D) and (E). And b) improving the compatibility of the components and improving the transparency and durability of the cured film . When the component (B) is not used, only a turbid film is obtained and the transparency is inferior. After the hot water resistance test, the antistatic property, the adhesion and the turbidity are increased. The coating material composition may be prepared by adding the component (B) as it is,
Alternatively, it may be added in a hydrolyzed state by a conventional method such as stirring at a temperature from normal temperature to reflux temperature in the presence of component (B), water and an effective amount of a hydrodispersion catalyst, for example, hydrochloric acid.

Specific examples of the component (B) include methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, n-butyltrimethoxysilane, n-hexyltrimethoxysilane, and vinyltrimethoxysilane. Silane, (a is 1), dimethyldimethoxysilane, phenylmethyldimethoxysilane, dimethyldiethoxysilane, diphenyldiethoxysilane, diphenyldimethoxysilane, methyldiethoxysilane, phenylmethyldiethoxysilane, γ-chloropropylmethyldimethoxy Silane, vinylmethyldiethoxysilane (a compound having a = 2), trimethylmethoxysilane, trimethylethoxysilane, triethylmethoxysilane, triethylethoxysilane (a
Is 3). When, for example, tetramethoxysilane, which is a compound in which a is 0, other than the organoalkoxysilane represented by the general formula [I], a cured film becomes cloudy and a transparent material cannot be obtained.

[0017] The proportion of the component (B) used is as follows:
1 to 40% by weight in 00% by weight, more preferably 5 to 30%
% By weight. When used in more than 40% by weight, wear resistance, durability is reduced, it is less than 1 wt%, clear curing the
No film is obtained.

Component (C) A polymerizable monomer having at least one acryloyloxy group and / or methacryloyloxy group in one molecule of the component (C) is produced by a known method and is commercially available. And, 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 (meth) acrylate, silicon poly (meth) acrylate and the like are described in "UV, EB Curing Handbook-Raw Materials-(Polymer Publishing Association)". Can be used.

Among the above, tetrahydrofurfuryl acrylate, dicyclopentanyl acrylate, hexamethylene diacrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate Acrylate, tris [(meth) acryloxyethyl] isocyanurate, ditrimethylolpropanetetra (meth) acrylate, pentaerythritol tetraacrylate, dipentaerythritol penta (meth) acrylate, Polyester synthesized from dipentaerythritol hexa (meth) acrylate, dibasic acid and trivalent or tetravalent alcohol and (meth) acrylic acid,
It is preferable to use urethane di, tri, tetra, penta, hexa (meth) acrylate or the like synthesized from tetra, penta or hexa (meth) acrylate, polyisocyanate and hydroxyl group-containing (meth) acrylate. preferable. One of these monomers may be used alone, or two or more thereof may be used in combination. Of the above, pentaerythritol triacrylate, dipentaerythritol pentaacrylate, and dipentaerythritol hexaacrylate are particularly preferable because of their excellent effects and air curability.

[0020] The component (C), while exerts interaction with other components (A) and component (B) mainly abrasion resistance and toughness to the cured film, flexibility and the grant, the cured coating Prevent cracking and improve adhesion. In addition, by using these radical polymerizable monomers, an ultraviolet curable coating having good productivity can be obtained.
It can be a covering composition . In the case where the component (C) is not used, sufficient adhesion cannot be obtained, and cracks are observed in a durability test such as a hot water resistance test, so that it is difficult to form a more practical cured film .

The proportion of the component (C) to be used is as follows:
20 to 80% by weight in 00% by weight, more preferably 30 to 80% by weight
60% by weight. When used in an amount exceeding 80% by weight, the antistatic property decreases, and when it is less than 20% by weight, abrasion resistance, durability, and adhesion to a substrate decrease.

Regarding the component (D), the antistatic agent of the component (D) includes (A), (B) and (C).
When used in combination with a component, it gives a cured film that is transparent and has excellent abrasion resistance and antistatic properties, and includes alkyl quaternary ammonium salts, alkyl phosphates, polyhydric alcohols having an ethylene oxide chain, metal alkoxides, and acetylacetone metal. At least one selected from a complex, a metal thiocyanate, a metal halide, a metal ultrafine particle, a conductive semiconductor ultrafine particle, a conductive polymer, and poly (meth) acrylic acid and a salt thereof; More than one species may be used in combination.

Specific examples of the component (D) include alkyl quaternary ammonium salts such as dodecyltrimethylammonium chloride, methacryloyloxyethylammonium chloride and methacrylamidopropyltrimethylammonium chloride; and bis (β-methacryloxyethyl) phosphate. Alkyl phosphates such as tertiary amine salts and alkyl tertiary amine salts such as tris (β-methchlorooxyethyl) phosphate; polyethylene glycol mono (meth) acrylate and polyethylene oxide of trimethylolpropane (n = 5-10) adduct, polyethylene oxide of pentaerythritol (n = 5-1)
0) adduct, polyethylene oxide of glycerin (n
= 5 to 10) polyvalent alcohols having an ethylene oxide chain such as an adduct; metal alkoxides such as tetraisopropoxytitanium, triethyloxyvanadium and tetrabutyloxyzirconium; acetylacetone metal such as acetylacetone indium, acetylacetone vanadium and acetylacetone aluminum Complexes; metal thiocyanates such as sodium thiocyanate and potassium thiocyanate; metal halides such as stannic chloride and indium chloride; ultrafine particles of metals such as copper, nickel and iron; indium tin oxide such as ITO; cadmium Conductive semiconductor ultrafine particles such as tin oxide and zinc oxide; conductive polymers such as polyacetylene, polyvinyl carbazole and polyaniline; polyacrylic acid, zinc zinc polyacrylate, polyacrylic acid N Mechirujietano - poly (meth) such as triethanolamine salt and acrylic acid and its salts.

Among the above, methacryloyloxyethyl ammonium chloride, bis (β-methacryloxyethyl phosphate N-methyldiethanolamine salt, and glycerin polyethylene oxide (n = 5 to 1)
0) It is preferable to use an adduct, tetraisopropoxytitanium, indium acetylacetone, sodium thiocyanate, stannic chloride, ITO, polyvinyl carbazole, zinc salt of polyacrylic acid and the like.

The proportion of the component (D) used is as follows:
1 to 20% by weight, more preferably 5 to 10% by weight
% By weight. When used in an amount exceeding 20% by weight, abrasion resistance and durability deteriorate, and if it is less than 1% by weight, sufficient antistatic properties cannot be obtained.

Regarding the component (E) As the active energy ray-sensitive catalyst which is the component (E),
Benzoin, benzoin monomethyl ether, benzoin monoisopropyl ether, acetoin, benzyl,
Benzophenone, p-methoxybenzophenone, diethoxyacetophenone, benzyldimethylketal, 2,
2-diethoxyacetophenone, 2,2-dimethoxy-
2-phenylacetophenone, 1-hydroxycyclohexylphenyl ketone, methylphenylglyoxyle
, Ethylphenylglyoxylate, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 2-
Carbonyl compounds such as methyl- [4- (methylthio) phenyl] -2-morpholino-1-propane; sulfur compounds such as tetramethylthiuram monosulfide and tetramethylthiuram disulfide; and 2,4,6-trimethylbenzoylphenylphosphine oxide And the like.
These are used alone or in combination of two or more. Among them, benzophenone, benzoin monoisopropyl ether, methylphenylglyoxylate, 2-
Hydroxy-2-methyl-1-phenylpropane-1-
On, 1-hydroxycyclohexyl phenyl ketone,
More preferably, benzyl dimethyl ketal is used.

The use ratio of the component (E) is as follows.
0.1 to 10% by weight in 00% by weight, more preferably 3 to 10% by weight
7% by weight. Is less than 0.1 part by weight%, curability is insufficient, abrasion resistance, can not be obtained cured film is excellent in durability when used in more than 10% by weight, lead to coloration of the cured film, the durability Also decrease.

The coating composition of the present invention comprises the above (A),
It comprises the components (B), (C), (D) and (E). If necessary, an organic solvent, an antioxidant, an anti-yellowing agent, a blueing agent, a pigment, a leveling agent, Various additives such as a foaming agent, a thickener, an anti-settling agent, an antistatic agent and an anti-fogging agent may be contained. The organic solvent is preferably selected and used depending on the type of the base material. That is, when polycarbonate is used as the base material, alcohol solvents such as isobutanol, ester solvents such as n-butyl acetate and diethylene glycol acetate, and cellosolve solvents such as ethyl cellosolve. It is preferable to use these three types in combination. The solvent is preferably used in an amount of 20 to 800 parts by weight based on 100 parts by weight of the coating composition.

The coating composition of the present invention can be applied to a substrate by a method such as brush coating, spray coating, dip coating, spin coating, and curtain coating.
It is preferable to apply the coating composition by adding an appropriate organic solvent from the viewpoints of application workability of the coating composition, smoothness and uniformity of the coating, and improvement in adhesion of the cured coating to the substrate.

The coating composition of the present invention crosslinks and forms a cured film by irradiation with active energy rays after being applied to a substrate. When the composition is cured by irradiation with active energy rays, the coating material composition is applied on a substrate so as to have a thickness of 1 to 30 μm, preferably 2 to 10 μm, and is applied using a high-pressure mercury lamp, a metal halide lamp or the like. , 100-400
Irradiation is performed so that the ultraviolet light of nm is 1000 to 5000 mJ / cm ² . The atmosphere for irradiation may be air,
It may be in an inert gas such as nitrogen or argon.

The coating material composition of the present invention can be used for modifying the surface of various synthetic resin molded articles as a base material. The synthetic resin molded articles have conventionally been used to improve the abrasion resistance and antistatic properties. Various kinds of thermoplastic resins and thermosetting resins which are desired can be used. Specifically, polymethyl methacrylic resin, polycarbonate resin, polystyrene resin, ABS resin,
AS resin, polyamide resin, polyarylate resin, polymethacrylimide resin, polyallyldiglycol-carbonate resin and the like can be mentioned. Above all, polymethyl methacrylic resin, polycarbonate resin, polystyrene resin and polymethacrylimide resin are excellent in transparency and strongly required to improve abrasion resistance, so that the antistatic coating material composition of the present invention is applied. Especially effective for The synthetic resin molded articles include sheet-shaped molded articles, film-shaped molded articles, and various injection molded articles made of these resins.

[0032]

The present invention will be described in more detail with reference to the following Examples and Comparative Examples. In the examples, “parts” means “parts by weight”. The measurement and evaluation in the examples were performed by the following methods. (1) Appearance of Cured Coating The appearance of the coating composition after coating and curing was visually evaluated. A surface with a smooth and transparent surface is marked with 〇, a part with clouding is marked with △, and a whitening or clouding is observed with ×.
And

(2) Abrasion resistance A steel wool of $ 000 was attached to the tip of a cylindrical cylinder having a diameter of 25 mm, and was brought into contact with a horizontally placed sample surface to obtain 1 kg.
After 50 reciprocal abrasions with a load of, the diffuse transmittance (haze value) was measured to determine the abrasion resistance. The criteria for the 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 damaged. C: Increased haze value = 3.0 or more: Severely damaged.

(3) Adhesiveness A cross cut reaching the substrate at 1 mm intervals is made on the cured film, 100 cross-cuts of 1 mm ² are made, a cello tape is stuck thereon, and the cross-cuts are rapidly peeled off. Was counted.無 い indicates no peeling, Δ indicates 1 to 50 peels, and × indicates 51 to 100 peels. (4) Surface resistance value The coated sample was allowed to stand for 24 hours in an atmosphere of 20 ° C. and a humidity of 65%, and then, in this atmosphere, a surface resistance measuring device (Advantest Co., Ltd., Hi-Megohmmeter, TR-860).
1, an applied voltage of 500 V) according to JIS K6911.

(5) Moisture Resistance The coated sample was left in an atmosphere of 60 ° C. and 95% humidity for 240 hours, and the appearance, surface resistance and change in adhesion of the cured film were evaluated. (6) Light Resistance Using a sunshine carbon weatherometer (manufactured by Suga Test Instruments, WEL-SUN-HC-B type) weather resistance tester, the test was conducted under conditions of black panel temperature of 63 ± 3 ° C., no rainfall, and continuous irradiation. Appearance of the cured film after 500 hours,
Changes in surface resistance and adhesion were evaluated.

Examples 1 to 8 and Comparative Examples 1 to 7 The coating compositions shown in Tables 1 and 2 were prepared. This coating material composition is applied to a polymethyl methacrylic resin injection molded plate [trade name, Acrypet VH ₀₀₁ , color tone clear, manufactured by Mitsubishi Rayon Co., Ltd., 100 × 100 × 3 mm thick] by an immersion method. Then, the mixture was left at 40 ° C. for 10 minutes to dry the solvent. Next, 1000 mJ / cm ² (wavelength 320
Ultraviolet light of up to 380 nm (integrated UV energy) was applied to form a cured film having a thickness of 4 to 5 μm after curing. Various measurements and tests were performed using the obtained coated acrylic plate . Tables 1 and 2 show the obtained results. Note that Comparative Example 1 includes Examples 1 to 8 and Comparative Examples 2 to
Injection of the same polymethyl methacrylic resin used for 7
The molded plate was evaluated.

[0037]

[Table 1]

[0038]

[Table 2]

The symbols of the compounds in the table are as follows. DPHA: dipentaerythritol pentaacrylate B-1: dimethyldimethoxysilane B-2: trimethylmethoxysilane B-3: methyltrimethoxysilane D-1: methacryloyloxyethylammonium chloride D-2: bis (β-methacrylic D-3: tetraisopropoxytitanium D-4: sodium thiocyanate D-5: tri (nonaethylene glycol) of glycerin
Additive BIP: Benzoin isopropyl ether BNP: Benzophenone

[0040]

The coating composition of the present invention combines the above-mentioned components (A), (B), (C), (D) and (E). By irradiating with active energy rays, it is possible to form a cured film having permanent antistatic properties and abrasion resistance, and excellent in transparency, adhesion to substrates, chemical resistance and weather resistance. In particular, it can be effectively applied to surface treatment of molded articles requiring transparency, such as polymethyl methacrylic resin, polycarbonate resin and polymethacrylimide resin.

Continuation of the front page (51) Int.Cl. ⁷ Identification symbol FI // C08F 2/44 C08F 299/02 299/02 G02B 1/10 Z (72) Inventor Takashi Kawaguchi 4-1-1 Sunadabashi, Higashi-ku, Nagoya-shi, Aichi Prefecture No. 60 Mitsubishi Rayon Co., Ltd. Product Development Laboratory (56) References JP-A-8-309790 (JP, A) JP-A-63-280790 (JP, A) JP-A-56-1118769 (JP, A) JP-A-52-139680 (JP, A) JP-A-6-136355 (JP, A) JP-A-4-309568 (JP, A) JP-A-3-275705 (JP, A) JP-A 64-62316 (JP) , A) JP-A-5-179160 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) C09D 5/00 C09D 1/00 C09D 4/06 C09D 183/04 G02B 1/10 C08F 2/44 C08F 299/02

Claims (1)

(57) [Claims] (A) 5 to 50 parts by weight of colloidal silica comprising silica particles having a primary particle diameter of 1 to 200 millimicrons, (B) a general formula (R ¹ ) _a -Si- (OR ² ) _4-a [I] (wherein R ¹ and R ² represent monovalent hydrocarbon groups having 1 to 6 carbon atoms and may be the same or different, and a represents an integer of 1 to 3). Alkoxysilane 1-40
(C) 20 to 80 parts by weight of a polymerizable monomer having at least one acryloyloxy group and / or methacryloyloxy group in one molecule, (D) an alkyl quaternary ammonium salt, an alkyl phosphate,
Polyhydric alcohol having an ethylene oxide chain, metal alkoxide, acetylacetone metal complex, metal thiocyanate, metal halide, metal ultrafine particle, conductive semiconductor ultrafine particle, conductive polymer, and poly (meth) acrylic acid; 1 to 20 parts by weight of at least one antistatic agent selected from salts thereof, and (E) 0.1 to 10 parts by weight of an active energy ray-sensitive catalyst (however, A and B) , C, D and E total 1
00 parts by weight. A) an antistatic coating material composition;