JPH08291207A - Actinic-radiation-curing resin composition - Google Patents

Abstract

PURPOSE: To provide a curing liquid resin compsn. being cured by an active energy ray such as ultraviolet ray, etc., having large tensile elasticity and small permittivity, and suitable as a protective coating material of parts for high frequency transmission.

CONSTITUTION: This active energy ray curing resin compsn. contains as resin components 20-50 wt.% polybutadiene contg. a group represented by formula CH₂=C(R₁)COO-(CH(R²)CH(R³)O)_n-, (wherein R¹, R², and R³ are the same or different, and they are hydrogen atom or methyl group, and n is 0 or an integer 1-5) (A), 40-80 wt.% multifunctional (meth)acrylate compd. having an alicyclic structure or a heterocyclic structure (B), and 0-40 wt.% reactive diluent (except the above-mentioned (B) component) (wherein (A)+(B)+(C)=100 wt.%) (C).

COPYRIGHT: (C)1996,JPO

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an active energy ray-curable resin composition. More specifically, it relates to a low dielectric constant polybutadiene-based curable resin composition suitable as an insulating material for coaxial cables.

[0002]

2. Description of the Related Art In recent years, an ultraviolet curable material has been favorably used as an insulating protective coating material in order to improve productivity in manufacturing electronic parts. For example, unsaturated polyester resin, unsaturated epoxy ester resin and the like are used. However, these resins have a large dielectric loss factor and are not suitable for high frequency transmission parts. Further, it is known that an ultraviolet curable resin containing polybutadiene having a (meth) acryloyl group as a main component can be used as a protective coating material requiring flexibility (see JP-A-53-84036). It could not be used for applications requiring tensile modulus.

[0003]

An object of the present invention is to provide a new active energy ray-curable resin composition. Another object of the present invention is to provide a liquid curable resin composition which is cured by active energy rays such as ultraviolet rays and has a large tensile elastic modulus and a small dielectric constant, which is suitable as a protective coating material for high frequency transmission parts. To provide. Further objects and advantages of the present invention will be apparent from the following description.

[0004]

According to the present invention, (A)
Formula _{(I) CH 2 = C (} R 1) COO- (CH (R 2) CH (R 3) O) n - ... (I) wherein, R ^1, R ² and R ³ are the same Or differently, a polybutadiene having a group represented by a hydrogen atom or a methyl group, and n is 0 or an integer of 1 to 2
0 to 50% by weight, 40 to 40% of (B) a polyfunctional (meth) acrylate compound having an alicyclic structure or a heterocyclic structure.
0 to 40% by weight (however, (A) + 80% by weight and (C) reactive diluent, but excluding the component (B) above)
There is provided an active energy ray-curable resin composition containing (B) + (C) = 100% by weight).

The active energy ray-curable resin composition of the present invention will be described in detail below. In the composition of the present invention, the component (A) and the component (B) are essential components,
The component (C) is an optional component. The polybutadiene as the component (A) has a group represented by the above formula (I). (A)
As the component polybutadiene, for example, polybutadiene having hydroxyl groups at both ends may be reacted with acrylic acid or methacrylic acid (when n = 0 in the formula (I)), or polybutadiene having hydroxyl groups at both ends may be ethylene oxide or It is produced by reacting propylene oxide and then reacting with acrylic acid or methacrylic acid (when n is an integer of 1 to 5 in the formula (I)). Polybutadiene having hydroxyl groups at both ends has a number average molecular weight of 500 to 1
It is preferably 0000 and preferably 70% or more of 1,4-bonds.

Further, CH ₂ = CHCOO-CH ₂ CH ₂ O
Polybutadiene having a group represented by-at both ends is
There are commercially available products (trade name: BAC-45, manufactured by Osaka Organic Chemical Industry Co., Ltd.), which can be preferably used. The polybutadiene as the component (A) can be used alone or in combination of two or more kinds.

The component (A) is contained in the composition of the present invention in an amount of 20 to
It is contained in a proportion of 50% by weight, preferably in a proportion of 25 to 45% by weight. If it is less than 20% by weight, the dielectric constant of the cured product will be large, and if it exceeds 50% by weight, the tensile modulus of the cured product will be small, making the composition of the present invention unsuitable for high-frequency transmission parts, which is the main application.

The polyfunctional (meth) acrylate compound having an alicyclic structure or a heterocyclic structure, which is the component (B) used in the present invention, contains a (meth) acryloyl group in one molecule, preferably 2 to 4 And more preferably two.
Here, the alicyclic structure in the polyfunctional (meth) acrylate compound having an alicyclic structure has 4 to 1 carbon atoms.
An alicyclic hydrocarbon group having 8 to 8 rings is preferable. Examples of such compounds include cyclohexyl di (meth) acrylate, tricyclodecane dimethanol di (meth) acrylate and compounds represented by the following formula (II) or (III). A preferred compound is tricyclodecane dimethanol dimethacrylate.

[0009]

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In the formula, R ⁴ is a hydrogen atom or a methyl group,
R ⁵ represents an alkylene group having 2 to 8 carbon atoms, preferably 2 to ⁵ carbon atoms, and p 1, p 2 and p 3 each independently represent an integer of 0 to 8, preferably 1 to 4.

[0011]

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In the formula, R ⁶ is a hydrogen atom or a methyl group,
R ⁷ represents an alkylene group having 2 to 8 carbon atoms, preferably 2 to 5 carbon atoms, and q1 and q2 each represent an integer of 0 to 8, preferably 1 to 4.

The heterocyclic structure in the polyfunctional (meth) acrylate compound having a heterocyclic structure has 1 to 4 oxygen atoms, nitrogen atoms, etc., and has 2 to 2 carbon atoms.
Groups having 4 are preferred. In addition, examples of the cyclic structure of the heterocyclic structure include an aromatic ring or an alicyclic ring, and an alicyclic structure is preferable. Examples of such compounds include the following formula (IV):
Examples thereof include compounds represented by (V) or (VI). Preferred compounds include compounds represented by the following formula (IV).

[0014]

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In the formula, R ⁷ and R ⁸ are a hydrogen atom or a methyl group, R ⁹ is an alkylene group having 2 to 8 carbon atoms, preferably 2 to 5 carbon atoms, and r is 0 to 8, preferably 0 to 4 Indicates an integer.

[0016]

[Chemical 4]

In the formula, R ¹⁰ , R ¹¹ , R ¹² and R ¹³ are a hydrogen atom or a methyl group, R ¹⁴ is an alkylene group having 2 to 8 carbon atoms, preferably 2 to 5 carbon atoms, and s 1 and s 2 are 1 to 8,
Preferably, the integer of 1-4 is shown.

[0018]

Embedded image

In the formula, R ¹⁵ is a hydrogen atom or a methyl group,
R ¹⁶ represents an alkylene group having 2 to 8 carbon atoms, preferably 2 to 5 carbon atoms, and t1 and t2 each represent an integer of 1 to 8, preferably 1 to 4.

These polyfunctional (meth) acrylate compounds having an alicyclic structure or a heterocyclic structure can be used alone or in combination of two or more kinds. The polyfunctional (meth) acrylate compound having an alicyclic structure or a heterocyclic structure is contained in the composition of the present invention in a proportion of 40 to 80% by weight, and in a proportion of 50 to 75% by weight. Is preferred.

The composition of the present invention contains the above-mentioned components (A) and (B) as essential components, but can be cured with active energy rays if necessary within a range that does not impair the effects of the composition of the present invention. Reactive diluents and other additives can be included. The reaction diluent is 0-40% by weight in the composition,
That is, not used: 0% by weight or 40% by weight
Can be used within. If it exceeds 40% by weight, the dielectric constant becomes large, which is not preferable.

The reactive diluent includes monofunctional compounds and polyfunctional compounds. Examples of the monofunctional compound include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, and 2
-Hydroxybutyl (meth) acrylate, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, isopropyl (meth) acrylate, butyl (meth) acrylate, amyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, pentyl (meth) acrylate, isoamyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate, octyl (meth) acrylate, isooctyl (meth) acrylate, 2-
Ethylhexyl (meth) acrylate, nonyl (meth) acrylate, decyl (meth) acrylate, isodecyl
(Meth) acrylate, undecyl (meth) acrylate,
Dodecyl (meth) acrylate, lauryl (meth) acrylate, octadecyl (meth) acrylate, stearyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, butoxyethyl (meth) acrylate, ethoxydiethylene glycol (meth) acrylate, benzyl (meth) Acrylate, cyclohexyl (meth) acrylate, phenoxyethyl (meth) acrylate, polyethylene glycol mono (meth) acrylate, polypropylene glycol mono (meth) acrylate, methoxyethylene glycol (meth) acrylate, ethoxyethyl (meth) acrylate, methoxypolyethylene glycol ( (Meth) acrylate, methoxy polypropylene glycol (meth) acrylate, dicyclopentadiene (meth Acrylate, dicyclopentanyl (meth) acrylate, dicyclopentenyl (meth) acrylate, tricyclodecanyl (meth) acrylate, isobornyl (meth) acrylate, bornyl (meth) acrylate, N- vinylpyrrolidone, N
-Vinyl caprolactam, (meth) acryloylmorpholine, dimethylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate, 7-amino-3,7-dimethyloctyl (meth) acrylate, hydroxybutyl vinyl ether, lauryl vinyl ether, cetyl vinyl ether, Examples thereof include 2-ethylhexyl vinyl ether, maleic acid esters, fumaric acid esters, and compounds represented by the following formulas (VII) to (IX).

[0023]

[Chemical 6]

In the formula, R ²¹ represents a hydrogen atom or a methyl group, R ²² represents an alkylene group having 2 to 6 carbon atoms, preferably 2 to 4 carbon atoms, and R ²³ represents a hydrogen atom or 1 to 12 carbon atoms, preferably Represents an alkyl group of 1 to 9, and u represents an integer of 0 to 12, preferably 1 to 8.

[0025]

[Chemical 7]

In the formula, R ²¹ is as described above, R ²⁴ represents an alkylene group having 2 to 8 carbon atoms, preferably 2 to 5 carbon atoms, and v represents an integer of 1 to 8, preferably 1 to 4. .

[0027]

Embedded image

In the formula, R ²¹ , R ²⁴ and v are as described above, and R ²⁵ represents a hydrogen atom or a methyl group.

As the monofunctional compound of the reactive diluent, Aronix M-111 and M-1 are commercially available products.
13, M-114, M-117 (above, manufactured by Toagosei Co., Ltd.), KAYARAD TC110S, R-629, R-
644 (all manufactured by Nippon Kayaku Co., Ltd.), IBXA, and VISCOAT 3700 (all manufactured by Osaka Organic Chemical Industry Co., Ltd.) are easily available.

Examples of polyfunctional compounds include trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, ethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, polyethylene glycol di. (Meth) acrylate, 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, trimethylolpropane trioxyethyl (meth) acrylate, bisphenol Examples thereof include epoxy (meth) acrylate obtained by adding (meth) acrylate to diglycidyl ether of A, and triethylene glycol divinyl ether. In addition, as a commercially available product, Upimer UV SA2007 (Mitsubishi Chemical Corporation)
), Viscoat 700 (Osaka Organic Chemical Industry Co., Ltd.)
), KAYARAD HDDA, DPCA-20, -30,-
60, -120, HX-620, D-310, D-33
0 (above, Nippon Kayaku Co., Ltd.), Aronix M-2
10, M-215, M-315, M-325 (all manufactured by Toagosei Co., Ltd.) and the like can be easily obtained.

The reactive diluent as the component (C) can be used alone or in combination of two or more kinds.

The composition of the present invention is cured by active energy rays. Here, the active energy rays are infrared rays, visible rays, ultraviolet rays, X rays, electron rays, α rays, β rays, γ.
Means a line, etc. Of these, ultraviolet rays are particularly preferably used.

When the composition of the present invention is cured with, for example, ultraviolet rays, a photopolymerization initiator is optionally used. Examples of such a photopolymerization initiator include 1-hydroxycyclohexyl phenyl ketone and 2,2-dimethoxy-
2-phenylacetophenone, xanthone, fluorenone, benzaldehyde, fluorene, anthraquinone,
Triphenylamine, carbazole, 3-methylacetophenone, 4-chlorobenzophenone, 4,4'-dimethoxybenzophenone, 4,4'-diaminobenzophenone, Michler's ketone, benzoinpropyl ether,
Benzoin ethyl ether, benzyl dimethyl ketal, 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropan-1-one, 2-hydroxy-
2-Methyl-1-phenylpropan-1-one, thioxanthone, diethylthioxanthone, 2-isopropylthioxanthone, 2-chlorothioxanthone, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholino-propane-1. -One, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butane-
1-one, 1- [4- (2-hydroxyethoxy) -phenyl] -2-hydroxy-2-methyl-1-propan-1-one, 2,4,6-trimethylbenzoyldiphenylphosphine oxide, etc. are commercially available. As a product, Irga
cure 184, 651, 500, 907, 369, 29
59, CGI-784, CGI-1700 (above, manufactured by Ciba Geigy), Lucirine TPO, Initiator 654.
(Above, manufactured by BASF), Darocure 1116, 117
3, 4265 (above, manufactured by Merck), Yubekuriru P36
(Manufactured by UCB) and the like.

Of these, benzophenone, 4-chlorobenzophenone, 4,4'-dimethoxybenzophenone, 4,4'-diaminobenzophenone,
Thioxanthone, Irgacure 184, 651, 907,
369, CGI-1700 (above, manufactured by Ciba Geigy), Lucirine TPO, Initiator 654 (above, B
Made by ASF), Darocure 1116, 1173 (above,
Merck & Co., Yubecryl P36 (UCB) and the like are used. These photopolymerization initiators are preferably 0.1 to 20 parts by weight, more preferably 0.1 to 10 parts by weight, based on 100 parts by weight of the total of the components (A), (B) and (C). To be done.

When a photopolymerization initiator is used, a photosensitizer can be used together. Examples of the photosensitizer include triethylamine, diethylamine, N-methyldiethanolamine, ethanolamine, 4-dimethylaminobenzoic acid, methyl 4-dimethylaminobenzoate, ethyl 4-dimethylaminobenzoate, and 4-dimethylaminobenzoic acid. Commercially available products such as isoamyl are Jubecryl P102, 103, 104, 105 (above, UC
(Manufactured by Company B) and the like.

Other additives which can be added to the composition of the present invention include epoxy resin, polyamide, polyamideimide, polyurethane, polybutadiene, chloroprene, polyether, polyester, pentadiene derivative, styrene / butadiene / styrene block copolymer. Examples thereof include polymers, styrene / ethylene / butene / styrene block copolymers, styrene / isoprene / styrene block copolymers, petroleum resins, xylene resins, ketone resins, fluorine-based oligomers, silicone-based oligomers, polysulfide-based oligomers and the like.

Further, in the composition of the present invention, various additives other than the above, such as an antioxidant, an ultraviolet absorber, a light stabilizer, a silane coupling agent, an antioxidant, a thermal polymerization inhibitor, a leveling agent, Colorant, surfactant, storage stabilizer,
A plasticizer, a lubricant, a solvent, a filler, an antiaging agent, a wettability improver, a coating surface improver and the like can be added as necessary. Commercially available antioxidants include Irganox 1
010, 1035, 1076, 1222 (all manufactured by Ciba-Geigy) and the like. As an ultraviolet absorber,
Tinuvin P, 234, 320, 326, 327, 32
8, 213 (Ciba Geigy), Sumisorb 1
10, 130, 140, 220, 250, 300, 32
0, 340, 350, 400 (above, manufactured by Sumitomo Chemical Co., Ltd.) and the like. Commercially available light stabilizers include Tinuvin 292, 144, 622LD (all manufactured by Ciba-Geigy) Sanol LS-770, 765, 29.
2,2626, 1114, 744 (Sankyo Kasei Co., Ltd.)
Manufactured) and the like. As a silane coupling agent,
γ-aminopropyltriethoxysilane, γ-mercaptopropyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, SH6 as a commercial product
062, 6030 (made by Toray Silicone Co., Ltd.), KB
E903, 603, 403 (manufactured by Shin-Etsu Chemical Co., Ltd.) and the like. Moreover, as a commercial product of the anti-aging agent, An
tigene W, S, P, 3C, 6C, RD-G, FR, A
W (above, Sumitomo Chemical Co., Ltd.), non-flex D
CD (manufactured by Seiko Chemical Co., Ltd.), Nocrac DP, PA, C
D, AD-F (above, Ouchi Shinko Co., Ltd. make) etc. are mentioned.

Further, for the purpose of further reducing the dielectric constant of the cured product of the composition of the present invention, a foaming agent capable of being foamed by heat or light can be dispersed and mixed into the composition to form the cured product into a foam structure. . Examples of the foaming agent used include a chemical foaming agent that generates a gas by heat or light, and hollow particles that contain a volatile substance as a physical foaming agent and expand by heat. Further, hollow particles containing a gas such as air, nitrogen, or argon may be dispersed and mixed in the composition to reduce the dielectric constant of the cured product. Examples of chemical blowing agents mentioned here include sodium bicarbonate, ammonium bicarbonate, ammonium carbonate, N, N'-dinitrosopentamethylenetetramine, azodicarbonamide, azobisisobutyronitrile, benzenesulfonylhydrazide, p, Examples thereof include p'-oxybis (benzenesulfonyl hydrazide) and p-toluenesulfonyl hydrazide. Further, specific examples of the physical foaming agent include hollow particles made of vinylidene chloride-based resin encapsulating isobutane.

The composition of the present invention can be produced by mixing the above-mentioned components by a conventional method. The viscosity of the composition of the present invention thus obtained is usually 200 to 10,000.
0 cps / 25 ° C., preferably 300-8,000 cp
s / 25 ° C.

[0040]

EXAMPLES The present invention will now be specifically described with reference to examples, but the present invention is not limited to these examples. In addition, below, a part means a weight part.

Example 1 28.0 parts of polybutadiene having acryloyloxy groups at both ends (Component A), trade name BAC-45 (manufactured by Osaka Organic Chemical Industry Co., Ltd.), tricyclodecane dimethanol diacrylate (Component B) ) 72.0 parts of trade name SA1002 (manufactured by Mitsubishi Chemical Corporation), Irgac as a photopolymerization initiator
3.0 parts of ure 184 was placed in a container and mixed by stirring at 40 to 50 ° C. to obtain a composition.

Example 2 A composition was obtained in the same manner as in Example 1 except that 35.0 parts of the same component A as in Example 1 and 65.0 parts of the same component B as in Example 1 were used.

Example 3 A composition was obtained in the same manner as in Example 1 except that 42.0 parts of the same component A as in Example 1 and 58.0 parts of the same component B as in Example 1 were used.

Example 4 40.0 parts of the same component A as in Example 1 and neopentyl glycol-modified trimethylolpropane diacrylate as the component B (trade name R-604 (Nippon Kayaku Co., Ltd.)
A composition was obtained in the same manner as in Example 1 except that 60.0 parts were used.

Example 5 35.0 parts of the same component A as in Example 1, 50.0 parts of the same component B as in Example 1 and isobornyl acrylate (abbreviated as IBXA) (component C) as the reactive diluent. A composition was obtained in the same manner as in Example 1 except that 15 parts were used.

Example 6 Hollow particles made of vinylidene chloride resin in which isobutane was included in 100.0 parts of the composition of Example 2 (average particle size: 15 μm)
m) 5.0 parts was placed in a container and mixed with stirring at room temperature to obtain a composition.

Comparative Example 1 A composition was obtained in the same manner as in Example 1 except that 40.0 parts of the same component A as in Example 1 and 60.0 parts of ethylene glycol diacrylate (abbreviated as EGDA) were used.

Evaluation Test A test piece was prepared from the composition obtained above by the method (1) or (2) below, and the dielectric constant and tensile modulus were measured by the following methods (3) and (4). . The results are shown in Table 1.

(1) Preparation of test piece A glass plate was coated with the composition using an applicator bar having a thickness of 150 μm, and ultraviolet rays of 500 mJ / cm ² were irradiated under a nitrogen atmosphere to obtain a cured film. Then, the cured film was peeled off from the glass plate, and the glass surface of the peeled cured film was again measured at 500 mJ / cm ^2.
Of the ultraviolet ray was irradiated in a nitrogen atmosphere. The cured film thus obtained was conditioned at 23 ° C. and 50% relative humidity for 24 hours to prepare a test piece.

(2) Preparation of Test Piece of Composition Containing Foaming Agent The composition was applied on a glass plate using an applicator bar having a thickness of 150 μm, and the glass plate was placed on the surface of the coating film. Then, the composition was placed between two glass plates to give 1
Heat at 00 ° C to expand the foaming agent, 500 mJ / cm ²
Was irradiated through the glass plate. Next, 500 mJ / cm ² of ultraviolet ray was irradiated again from the opposite side to obtain a cured film. The cured film thus obtained was conditioned at 23 ° C. and 50% relative humidity for 24 hours to prepare a test piece.

(3) Measurement of dielectric constant HP41 was used as a test piece using the cured film obtained in (1) above.
Using a 94A impedance / gain fuse analyzer and HP16451B dielectric measurement electrodes (above, Yokogawa / Hewlett-Packard Co., Ltd.), JIS K
According to 6911, the dielectric constant at a frequency of 1 MHz was measured.

(4) Measurement of tensile elastic modulus (Y ₂₃ ) at 23 ° C. The cured film obtained in (1) above was used as a test piece according to JIS.
The tensile modulus at 23 ° C. was measured according to K7113. However, the pulling speed is 1 mm / min and 2.
The tensile modulus was calculated from the tensile stress at 5% strain.

[0053]

[Table 1]

The compounds of the products in Table 1 are as follows. BAC-45:

[0055]

[Chemical 9]

In the formula, PBD is cis-1,4 / vine
l-1,2 / trans-1,4 = 20/20/60 (%
Ratio), number average molecular weight 2,800, viscosity 50 poise / 30
Represents polybutadiene having a temperature of ° C. SA1002: tricyclodecane dimethanol diacrylate R604: neopentyl glycol modified trimethylolpropane diacrylate

[0057]

[Chemical 10]

The preferred embodiments of the present invention will be described below. 1. (A) formula _{(I) CH 2 = C (} R 1) COO- (CH (R 2) CH (R 3) O) n - ... (I) wherein, R ^1, R ² and R ³ is the same or different and is a hydrogen atom or a methyl group, and n is 0 or an integer of 1 to 5, and 2 is a polybutadiene having a group represented by
0 to 50% by weight, 50 to 50% of (B) a polyfunctional (meth) acrylate compound having an alicyclic structure or a heterocyclic structure.
An active energy ray-curable resin composition containing 0 to 40% by weight of 75% by weight and (C) a reactive diluent, but excluding the component (B). 2. The polybutadiene of (A) above has a molecular weight of 500 to 1
The above-mentioned 1 which is a compound in which a hydroxyl group at least at one end of polybutadiene having hydroxyl groups at both ends of 0000 is converted to a group represented by the above formula (I).
Composition. 3. Polybutadiene having a hydroxyl group at both ends and having a molecular weight of 500 to 10,000 has 1,4-bonds of 70.
% Of the above composition. 4. The polyfunctional di (meth) acrylate compound having an alicyclic structure or a heterocyclic structure is at least one selected from the group consisting of tricyclodecane dimethanol diacrylate and neopentyl glycol modified trimethylolpropane diacrylate. The composition of 1 above which is a seed. 5. 0.1 to 100 parts by weight of photopolymerization initiator
~ 20 parts by weight of the composition of 1 above. 6. The composition according to 1 above, wherein the cured product has a dielectric constant at 1 MHz of 3.0 or less and a tensile modulus of 30 kg / mm ² or more.

[0059]

According to the present invention, an active energy ray-curable resin composition having a low dielectric constant and a sufficient tensile elastic modulus as a protective coating material for high frequency transmission products can be obtained.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Takeshi Watanabe 2-11-24 Tsukiji, Chuo-ku, Tokyo Within Nippon Synthetic Rubber Co., Ltd. (72) Takashi Ukaji 2-11-24 Tsukiji, Chuo-ku, Tokyo Japan Synthetic Rubber Co., Ltd.

Claims (1)

[Claims] 1. (A) The following formula (I) CH ₂ ═C (R ¹ ) COO— (CH (R ² ) CH (R ³ ) O) _n −... (I) wherein R ¹ , R ² and R ³ are the same or different and each is a hydrogen atom or a methyl group, and n is 0 or an integer of 1 to 5;
0 to 50% by weight, 40 to 40% of (B) a polyfunctional (meth) acrylate compound having an alicyclic structure or a heterocyclic structure.
0 to 40% by weight (however, (A) + 80% by weight and (C) reactive diluent, but excluding the component (B) above)
(B) + (C) = 100% by weight), the active energy ray-curable resin composition.