TW201307495A - Moisture-proof insulative coating with visible light-blocking properties - Google Patents

Abstract

Provided is a moisture-proof insulative coating for electronic parts which exhibits superior electrical insulation reliability and visible light-shielding properties. The moisture-proofing insulating coating comprises a thermoplastic elastomer, two or more kinds of dyes and a solvent, and the total light transmittance of a coated film produced by coating and drying said coating is 5% or less when the film thickness is 100 [mu]m. The thermoplastic elastomer is preferably a styrene thermoplastic elastomer such as a styrene-butadiene-styrene block copolymer elastomer. At least one of the dyes is preferably an anthraquinone dye. The dye content is preferably 0.1 - 10 parts by mass with respect to 100 parts by mass of the thermoplastic elastomer. The moisture-proofing insulating coating preferably also comprises a tackifier such as a petroleum resin tackifier.

Description

Moisture-proof insulating coating with concealing visible light

The invention relates to coating. The dried coating film has a high concealing moisture-proof insulating coating for visible light. In more detail, the feature is that by using two or more kinds of dyes, coating. The total light transmittance of the coating film produced by drying is 5% or less of a moisture-proof insulating coating at a film thickness of 100 μm. Furthermore, the present invention relates to coating the moisture-proof insulating coating. A moisture-proof insulating material that is dried. Still further, the present invention relates to an electronic component insulated by the moisture-proof insulating material.

In the power equipment, there is a tendency to reduce the size, weight, and versatility of the electric power equipment. The assembled circuit boards mounted on various electric machines that control them are insulated for the purpose of protection against moisture, dust, and gas. In the insulating treatment method, a protective coating treatment using a moisture-proof insulating coating such as an acrylic resin, an urethane resin, or a polyfluorene-based resin is widely used. Further, in recent years, with the spread of liquid crystal monitors, in order to prevent light leakage of the LED backlight, it is strongly required to impart concealability to visible light in the protective coating.

In order to cope with this requirement, an inorganic filler, carbon black, and all dyes are used as a concealing material (Japanese Laid-Open Patent Publication No. 2001-123047), or a part thereof (JP-A-2008-208179, JP-A-2007-031514). Japanese Laid-Open Patent Publication No. 2006-016437, Japanese Laid-Open Patent Publication No. 2006-045340, and JP-A-2006-335975.

Japanese Laid-Open Patent Publication No. 2001-123047 discloses a composition containing vermiculite as an inorganic filler, carbon black as a pigment, and an oil-soluble black dye as a dye. JP-A-2008-208179 discloses a composition containing an organic dye having an absorption wavelength of 300 to 750 nm as a dye containing vermiculite or titanium dioxide as an inorganic filler. Japanese Laid-Open Patent Publication No. 2007-031514 discloses a composition containing vermiculite, magnesium hydroxide, and white titanium oxide as inorganic fillers.

The composition disclosed in the above-mentioned Japanese Patent Laid-Open Publication No. 2001-123047, JP-A-2008-208179, and JP-A-2007-031514 is a user of a semiconductor sealant and a description relating to a moisture-proof insulating paint. There is no such thing. Further, the inorganic filler or carbon black is associated with a decrease in electrical insulation. Further, it is considered that inorganic fillers and carbon black having a larger particle diameter than dyes are particularly disadvantageous for current electronic devices that progress toward fine pitch.

Further, Japanese Laid-Open Patent Publication No. 2006-016437 discloses that an acrylic polymer is used as a resin. The (azine) dye is a composition of a dye. However, the heat resistance of the acrylic polymer is as low as 80 to 100 ° C, and there is a drawback in that the current electronic device in which the amount of heat generation is increased due to high integration is limited.

Japanese Laid-Open Patent Publication No. 2006-045340 discloses a composition comprising a styrene block copolymer rubber of the A-B-A type as a thermoplastic elastomer and a chromic acid salt of an azo compound as a dye. However, azo dyes have the disadvantage of being affected by the environment and the human body. Further, although the dye is added in an amount of up to 25 parts by mass relative to 100 parts by mass of the thermoplastic elastomer However, in the wavelength regions of 650 nm and 700 nn, the transmittances of 10% and 25% are respectively exhibited, and it is difficult to say that the concealability is sufficient. Further, the addition of a large amount of dye and the reduction of the proportion of the resin which is electrically insulating are related to the decrease in electrical insulation properties. Further, when a dye exceeding the compatibility with the thermoplastic elastomer is added, precipitation of the dye occurs, and it is judged that the electrical insulating property is further lowered. Furthermore, azo dyes are not suitable for use in materials that have an adverse effect on the environment and the human body.

Further, Japanese Laid-Open Patent Publication No. 2006-335975 discloses that an ABA type styrene block copolymer rubber is used as a thermoplastic elastomer. The dye is a composition of the dye. However, although the dye is added in an amount of up to 25 parts by mass with respect to 100 parts by mass of the elastomer, in the wavelength regions of 650 nm and 700 nn, each exhibits a transmittance of 9% and 22%, and it is difficult to say that the concealability is charging. very. Further, the addition of a large amount of dye and the reduction of the proportion of the resin which is electrically insulating are related to the decrease in electrical insulation properties. Further, when a dye exceeding the compatibility with the thermoplastic elastomer is added, precipitation of the dye occurs, and it is judged that the electrical insulating property is further lowered.

On the other hand, Japanese Laid-Open Patent Publication No. Hei 10-036722 discloses a composition containing vermiculite as an inorganic filler and black titanium oxide as a pigment. Although this composition showed a hiding ratio of 95% or more in the coating test according to JIS K5400, the description relating to the moisture-proof insulating coating was completely absent.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2001-123047

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2008-208179

[Patent Document 3] Japanese Patent Laid-Open Publication No. 2007-031514

[Patent Document 4] Japanese Patent Laid-Open Publication No. 2006-016437

[Patent Document 5] Japanese Patent Laid-Open Publication No. 2006-045340

[Patent Document 6] Japanese Laid-Open Patent Publication No. 2006-335975

[Patent Document 7] Japanese Patent Laid-Open No. Hei 10-036722

Therefore, in order to simultaneously satisfy high electrical insulating properties and high concealability to visible light, it is desirable to use no inorganic filler and carbon black, and to impart concealability only by the dye, and there is no moisture-proof insulating coating which is accompanied by a decrease in electrical insulating properties.

The object of the present invention is to provide a coating. The dried coating film has a high concealing moisture-proof insulating coating for visible light, and the moisture-proof insulating coating is applied. A dry, moisture-proof insulating material, and an electronic component insulated by the moisture-proof insulating material.

In order to solve the above problems, the inventors of the present invention have devoted themselves to reviewing the results, and found that the coating material is coated with a moisture-proof insulating coating containing a thermoplastic elastomer, two or more kinds of dyes, and a solvent as essential components. When the film thickness of the coating film produced by drying is 100 μm, the moisture-proof insulating coating having a total light transmittance of 5% or less of the coating film has high electrical insulating properties and high concealing property against visible light, and This coating. The film produced by drying can be solved The problem is finally solved by the present invention.

That is, the present invention (I) is a moisture-proof insulating coating which is a moisture-proof insulating coating containing a thermoplastic elastomer, two or more kinds of dyes and a solvent, and is characterized in that the coating is applied. The total light transmittance of the coating film produced by drying is 5% or less at a film thickness of 100 μm.

The invention (II) is a moisture-proof insulating material which is coated with the moisture-proof insulating coating of the invention (I). Dry and get.

The invention (III) is an electronic component which is insulated by the moisture-proof insulating material of the invention (II).

Further, the present invention relates to the following [1] to [12].

[1] A moisture-proof insulating coating comprising a thermoplastic elastomer, two or more dyes, and a solvent-based moisture-proof insulating coating, characterized in that the coating is applied. The total light transmittance of the coating film produced by drying is 5% or less at a film thickness of 100 μm.

[2] The moisture-proof insulating coating according to [1], wherein the blending ratio of the dye to the thermoplastic elastomer is in the range of 0.1 to 10 parts by mass based on 100 parts by mass of the thermoplastic elastomer.

[3] The moisture-proof insulating coating according to [1] or [2], wherein the thermoplastic elastomer is a styrene-based thermoplastic elastomer.

[4] The moisture-proof insulating coating according to any one of [1] to [3], wherein at least one of the two or more dyes is an anthraquinone dye.

[5] The moisture-proof insulating coating according to any one of [1] to [4] wherein the solvent contains an aliphatic hydrocarbon solvent having a boiling point of 80 ° C or more and less than 140 ° C.

[6] The moisture-proof insulating coating according to [5], wherein the solvent further contains acetate and/or carbonate.

[7] The moisture-proof insulating coating according to any one of [1] to [6] wherein the amount of the thermoplastic elastomer is relative to the total amount of the moisture-proof insulating coating (when the moisture-proof insulating coating contains a tackifier) The ratio of the total amount of the thermoplastic elastomer to the tackifier is 10 to 40% by mass.

[8] The moisture-proof insulating coating according to any one of [1] to [7], which has a viscosity of 1500 mPa at 25 ° C. s below.

[9] The moisture-proof insulating coating according to any one of [1] to [8] further comprising a tackifier.

[10] The moisture-proof insulating coating according to [9], wherein the tackifier is a petroleum resin-based tackifier.

[11] A moisture-proof insulating material characterized by coating the moisture-proof insulating coating according to any one of [1] to [10]. Dry and get.

[12] An electronic component insulated by the moisture-proof insulating material described in [11].

Applying the moisture-proof insulating coating of the present invention. The dried coating film (i.e., the moisture-proof insulating material of the present invention) has both high electrical insulation reliability and high concealability to visible light. Therefore, the electronic component covered by the moisture-proof insulating material of the present invention has both high concealability to visible light and high electrical insulation reliability.

In other words, by using the moisture-proof insulating coating of the present invention, it is possible to manufacture A long-lasting coating with high electrical insulation reliability and high concealment of visible light can produce electronic parts with high reliability for a long time.

[Formation of the Invention]

Hereinafter, the present invention will be specifically described.

First, the moisture-proof insulating coating of the present invention (I) will be described.

The invention (I) is a moisture-proof insulating coating which is a moisture-proof insulating coating containing a thermoplastic elastomer, two or more kinds of dyes and a solvent, and is characterized in that the coating material is coated. The total light transmittance of the coating film produced by drying is 5% or less at a film thickness of 100 μm.

First, a thermoplastic elastomer which is an essential component of the moisture-proof insulating coating of the invention (I) will be described.

In addition, the "thermoplastic elastomer" described in the present specification is a polymer which has a property of being formed by processing in the same manner as a normal thermoplastic resin, and exhibiting rubber elasticity (that is, remarkable elastic recovery) at normal temperature. The details of the compounds are described in the Physical Chemistry Dictionary Compilation Committee, "The Thermoplastic Elastomers", the first edition of the first brush, the (stock) industrial survey will be issued, December 20, 2003.

The thermoplastic elastomer which is an essential component of the moisture-proof insulating coating material of the invention (I) may, for example, be a styrene-based thermoplastic elastomer, a vinyl chloride-based thermoplastic elastomer, an olefin-based thermoplastic elastomer or a urethane-based thermoplastic elastomer. Body, polyester-based thermoplastic elastomer, nitrile-based thermoplastic elastomer, polyamine-based thermoplastic elastomer, fluorine-based thermoplastic elastomer, chlorinated polyethylene-based thermoplastic A flexible elastomer, a polysiloxane-based thermoplastic elastomer, or the like may be used singly or in combination of two or more.

The "styrene-based thermoplastic elastomer" described in the present specification means a thermoplastic elastomer having a structural unit derived from styrene in a molecular structure, and is generally a block copolymer of styrene and olefin.

The "vinyl chloride-based thermoplastic elastomer" described in the present specification means that unlike other thermoplastic elastomers, it is not a copolymer of a hard segment and a soft segment, but is suspended or emulsified by the production of a soft polyvinyl chloride. A thermoplastic elastomer obtained by polymerizing a gelled polyvinyl chloride containing a partially crosslinked gel, a plasticizer of a high degree of polymerization polyvinyl chloride, a nitrile-butadiene rubber modified polyvinyl chloride or the like.

The "polyurethane-based thermoplastic elastomer" described in the present specification means a reaction obtained by reacting a poly(ester) polyol, a poly(carbonate) polyol, and/or a poly(ether) polyol with an isocyanate. Thermoplastic elastomer.

The "olefin-based thermoplastic elastomer" described in the present specification means a thermoplastic elastomer which is generally micro-dispersed with ethylene-propylene rubber (EPDM, EPM) in polypropylene, or a polypropylene segment as a hard segment. A copolymerized unit containing polyethylene or the like is a thermoplastic elastomer of a copolymer of a soft segment.

The "polyester-based thermoplastic elastomer" described in the present specification means a polycarboxylic acid or an ester compound having an aromatic ring represented by terephthalic acid or dimethyl terephthalate, and an alkylene group Alcohol, poly(ether) polyol, poly(polyester) polyol and/or poly(carbonate) polyol as original A thermoplastic elastomer which can be produced by a transesterification or a polycondensation reaction.

The "nitrile-based thermoplastic elastomer" described in the present specification means that an olefin-based thermoplastic elastomer and a nitrile rubber (a copolymer rubber of an α,β-unsaturated nitrile and a conjugated diene) are melt-kneaded, and a crosslinking agent is added. (Phenolic resin-based crosslinking agent, sulfur-based crosslinking agent, organic peroxide, etc.), a thermoplastic elastomer which can be produced by crosslinking.

The "polyamine-based thermoplastic elastomer" described in the present specification means that polyamine is used as a hard segment, and poly(ester) polyol, poly(ether) polyol, and poly(carbonate) are used herein. The alcohol and/or poly(alkylene) polyol is a thermoplastic elastomer formed from a block copolymer of a soft segment.

The "fluorine-based thermoplastic elastomer" described in the present specification means a thermoplastic elastomer comprising a fluororesin molecule as a hard segment and a fluororubber molecule and/or a polyoxyxylene rubber molecule as a soft segment.

The "chlorinated polyethylene-based thermoplastic elastomer" described in the present specification means a thermoplastic elastomer in which a hard segment is composed of a block-formed chlorinated polyethylene, and a soft segment is composed of a random chlorinated polyethylene.

The "polyoxane-based thermoplastic elastomer" described in the present specification means that a -Si-O-Si- bond is contained in a molecule, and the physical properties of the elastomer are exhibited by adding a catalyst such as a peroxide or a platinum compound. Thermoplastic elastomer.

Among these thermoplastic elastomers, a styrene-based thermoplastic elastomer is preferred. Examples of the styrene-based thermoplastic elastomer include styrene. Butadiene. Styrene block copolymer (SBS), styrene. Ethylene / butene. Styrene block copolymer (SEBS), styrene. Isoprene. Styrene block copolymer (SIS), styrene. Ethylene / propylene. Styrene embedded Segment copolymer (SEPS), styrene. Vinyl isoprene. Styrene block copolymer rubber (SVIS) and the like. As a commercial item of such a styrene-based thermoplastic elastomer, D1101, D1102, D1155, DKX405, DKX410, DKX415, D1192, D1161, D1171, G1652, G1730 (above, CLAYTON Polymer Co., Ltd.), tufprene ( Registered trademark) A, tufprene (registered trademark) 125, tufprene (registered trademark) 126S, tuftec (registered trademark) H1141, tuftec (registered trademark) H1041, tuftec (registered trademark) H1043, tuftec (registered trademark) H1052 (above Asahi Kasei Chemical Co., Ltd.). These may be a single one or a mixture of two or more kinds, and some or all of them may be hydrogenated.

The content of the structural unit derived from styrene contained in the styrene-based thermoplastic elastomer is preferably 15 to 50% by mass, and more preferably 18 to 45% by mass based on the total amount of the styrene-based thermoplastic elastomer. , especially good is 19 to 43% by mass. When the content of the structural unit derived from styrene contained in the styrene-based thermoplastic elastomer is less than 15% by mass based on the total amount of the styrene-based thermoplastic elastomer, the cohesive force of the elastomer is insufficient. Say it is good. In addition, when the total amount of the styrene-based thermoplastic elastomer is more than 50% by mass, the rubber properties of the elastomer tend to be inferior, and the moisture-proof performance tends to be insufficient, which is not preferable.

Next, a dye which is an essential component of the moisture-proof insulating coating of the present invention (I) will be described.

The dye of the essential component of the moisture-proof insulating coating of the present invention (I) is used in order to exhibit high light-shielding properties in a wide visible light region. Dye.

Examples of the dye used as a component of the moisture-proof insulating coating of the present invention (I) include direct dyes, acid dyes, basic dyes, mord dyes, acid mord dyes, vat dyes, disperse dyes, reactive dyes, and fluorescent whitening. For dyes, plastic dyes, etc., two or more of these dyes are used. The color type is preferably a combination of at least red and blue, and more preferably a combination of red, yellow, and blue.

In addition, the "dye" described in the present specification means a substance which is soluble in a solvent or has compatibility with a resin and has a property of coloring a substance which has been dissolved and dissolved.

Further, the "direct dye" described in the present specification means a dye which is water-soluble and which is dyed in a neutral or weakly alkaline bath with a neutral salt or the like as an auxiliary.

The "acid dye" described in the present specification means a dye which is water-soluble and which is dyed in an acid bath such as sulfuric acid, formic acid or acetic acid.

The "basic dye" described in the present specification means a dye which is water-soluble and which is dyed in a neutral or weakly alkaline bath to a fiber in which an acidic substance such as tannic acid is adhered in advance.

The "mord dye" described in the present specification means a dye which is dyed in a bath of a mord dye solution for a fiber in which a metal hydroxide or oxide of chromium, aluminum, iron, tin or the like is fixed in advance.

The "acid mord dye" described in the present specification means water-soluble, and the fiber is dyed in an acid bath such as sulfuric acid, formic acid or acetic acid. Or a dye which is dyed in a bath of a mordant dye solution for a fiber in which a metal hydroxide or oxide of chromium, aluminum, iron, tin or the like is fixed in advance.

The "reducing dye" described in the present specification is a dye which is insoluble or poorly soluble in water, is dissolved in an alkaline bath by reduction of a carbonyl group in a chemical structure, and is dyed by air oxidizing the fibers impregnated therein.

The "dispersion dye" described in the present specification means a dye which is insoluble or poorly soluble in water, is dispersed in a liquid by using a surfactant, and is impregnated with a fiber.

The "reactive dye" described in the present specification means a dye having a chemical structure capable of covalent bonding with cellulose, wool, nylon, or the like, and dyed by reaction with the fibers.

The "fluorescent whitening dye" described in the present specification means a dye which absorbs ultraviolet rays and emits a long-wavelength blue-purple light.

The "plastic dye" described in the present specification is a dye which is oil-soluble and has high compatibility with a resin and is intended to dye a resin without using a fiber.

Among these, plastic dyes such as monoazo dyes (Colour Index Constitution Number 11000 to 19999), diazo dyes (color index number 20000-29999), and triaryl groups are preferred. Dye (color index number 42000~44999), quinoline dye (color index setting number 47000~47999), methine dye (color index setting number 48000~48999), 吖 Dyes (color index setting number 50000~50999), aminoketone dyes (color indexing number 56000~56999), anthraquinone dyes (color indexing number 58000~72699), anthraquinone dyes (color indexing number) In addition, it is more preferable to use at least one dye selected from these dyes, and it is used in the case of 72000-72999.

It is particularly preferable to use at least one kind of a mixture of two or more kinds of dyes which are an anthraquinone dye (color index number 58000 to 72699).

In addition, the "color indexing number" described in the present specification means "coloring materials (pigments and dyes) and related compounds established in accordance with The Society of Dyers and Colourists and The American Association of Textile Chemists and Colorists. In the database of Colour Index International, the number given on the basis of chemical structure".

The ratio of the dye to the thermoplastic elastomer is not particularly limited. However, if the concentration of the thermoplastic elastomer is too low, sufficient concealability cannot be obtained, and if it is a concentration exceeding the allowable amount of compatibility with the thermoplastic elastomer, drying is performed. The precipitation of dye crystals occurs, which adversely affects electrical insulation. Therefore, the ratio of the dye to the thermoplastic elastomer is preferably in the range of 0.1 to 10 parts by mass based on 100 parts by mass of the thermoplastic elastomer. Further, it is more preferably 0.15 to 5 parts by mass.

The solvent which is an essential component of the invention (I) includes diethyl ketone (boiling point 101 ° C), methyl ethyl ketone (boiling point 79.5 ° C), diisopropyl ketone (boiling point 125 ° C), and methyl group. Ketone solvent such as propyl ketone (boiling point 94 ° C), methyl isobutyl ketone (boiling point 116 ° C) and acetone (boiling point 56.5 ° C), n-heptane (boiling point 98 ° C), n-octane (boiling point 125 ° C), N-hexane (boiling point 69 ° C), cyclohexane (boiling point 81 ° C), methylcyclohexane ( Boiling point 101 ° C), cis-1,2-dimethylcyclohexane (boiling point 130 ° C), trans-1,2-dimethylcyclohexane (boiling point 124 ° C), cis-1,3-dimethyl Cyclohexane (boiling point 120 ° C), trans-1,3-dimethylcyclohexane (boiling point 124 ° C), cis-1,4-dimethylcyclohexane (boiling point 125 ° C), trans-1,4 - an aliphatic hydrocarbon solvent such as dimethylcyclohexane (boiling point 119 ° C), ethyl cyclohexane (boiling point 130 ° C) and cyclopentane (boiling point 49 ° C), benzene (boiling point 80 ° C), toluene (boiling point 111 °C), o-xylene (boiling point 144 ° C), meta-xylene (boiling point 139 ° C) and para-xylene (boiling point 138 ° C) and other aromatic hydrocarbon solvents, diethyl ether (boiling point 35 ° C), dibutyl ether (ether boiling point 142 ° C) and tetrahydrofuran (boiling point 66 ° C) ether solvent, chloroform (boiling point 61 ° C) and dichloromethane (boiling point 40 ° C) and other halogenated hydrocarbon solvent, ethyl acetate (boiling point 77 ° C), methyl acetate (boiling point 56.9 ° C), n-propyl acetate (boiling point 96.6 ° C), n-butyl acetate (boiling point 126 ° C), isopropyl acetate (boiling point 89 ° C), isobutyl acetate (boiling point 117 ° C), acetic acid second Acetate solvent such as ester (boiling point 112 ° C) and tert-butyl acetate (boiling point 97 ° C), dimethyl carbonate (boiling point 90 ° C), carbonic acid a carbonate solvent such as a ethyl ester (boiling point: 107 ° C) and diethyl carbonate (boiling point: 126 ° C), a nitrile solvent such as acetonitrile (boiling point: 82 ° C), 1-butanol (boiling point: 118 ° C), 2-propanol ( Alcohol solvent such as boiling point 82 ° C), 1-propanol (boiling point 97 ° C), ethanol (boiling point 79 ° C) and methanol (boiling point 65 ° C), paraffin oil (boiling point 150-280 ° C), naphthenic oil (boiling point 175~) 280 ° C), mineral spirits (boiling point 130 ~ 180 ° C) and naphtha (boiling point 30 ~ 200 ° C) and other petroleum distillate solvents, N, N-dimethylformamide (boiling point 153 ° C) and N, N - dimethyl acetamide (boiling point 165 ° C) The guanamine solvent, and the hydrazine solvent such as dimethyl hydrazine (boiling point 189 ° C). These may be used singly or in combination of two or more.

The blending amount of all the solvents is preferably 50% by mass or more, and more preferably 60 to 80% by mass based on the entire moisture-proof insulating coating.

Among these, n-heptane (boiling point 98 ° C), n-octane (boiling point 125 ° C), cyclohexane (boiling point 81 ° C), methylcyclohexane (boiling point 101 ° C), cis-1 are preferred. , 2-dimethylcyclohexane (boiling point 130 ° C), trans-1,2-dimethylcyclohexane (boiling point 124 ° C), cis-1,3-dimethylcyclohexane (boiling point 120 ° C) , trans-1,3-dimethylcyclohexane (boiling point 124 ° C), cis-1,4-dimethylcyclohexane (boiling point 125 ° C), trans-1,4-dimethylcyclohexane ( An aliphatic hydrocarbon solvent having a boiling point of 119 ° C) and ethylcyclohexane (boiling point: 130 ° C) having a boiling point of 80 ° C or more and less than 140 ° C.

More preferably, it is methylcyclohexane (boiling point 101 ° C), cis-1,2-dimethylcyclohexane (boiling point 130 ° C), trans-1,2-dimethylcyclohexane (boiling point 124 ° C), Cis-1,3-dimethylcyclohexane (boiling point 120 ° C), trans-1,3-dimethylcyclohexane (boiling point 124 ° C), cis-1,4-dimethylcyclohexane (boiling point) 125°C), trans-1,4-dimethylcyclohexane (boiling point: 119° C.), and ethylcyclohexane (boiling point: 130° C.) have a cyclic structure having a boiling point of 90° C. or higher and less than 135° C. An aliphatic hydrocarbon solvent.

Further, when an aliphatic hydrocarbon solvent having a boiling point of not less than 140 ° C and not more than 140 ° C is used, as the solvent, only an aliphatic hydrocarbon solvent having a boiling point of 80 ° C or higher and less than 140 ° C is used, but it is shortened. In the case of the drying time after coating, in order to prevent the rapid drying property after application and the spinnability at the time of coating, it has a boiling point of 80 ° C or more and less than 140 ° C. Along with the aliphatic hydrocarbon solvent, it is preferred to use acetate and/or carbonate as a solvent.

Examples of the acetate include ethyl acetate (boiling point 77 ° C), methyl acetate (boiling point 56.9 ° C), n-propyl acetate (boiling point 96.6 ° C), n-butyl acetate (boiling point 126 ° C), and isopropyl acetate. Ester (boiling point 89 ° C), isobutyl acetate (boiling point 117 ° C), second butyl acetate (boiling point 112 ° C) and acetic acid tert-butyl ester (boiling point 97 ° C). Among these, n-propyl acetate (boiling point 96.6 ° C), n-butyl acetate (boiling point 126 ° C), isobutyl acetate (boiling point 117 ° C), second butyl acetate (boiling point 112 ° C) and Tert-butyl acetate (boiling point 97 ° C), more preferably n-butyl acetate (boiling point 126 ° C), isobutyl acetate (boiling point 117 ° C) and second butyl acetate (boiling point 112 ° C).

Further, examples of the carbonate include dimethyl carbonate (boiling point: 90 ° C), methyl ethyl carbonate (boiling point: 107 ° C), and diethyl carbonate (boiling point: 126 ° C), and preferably methyl ethyl carbonate. (boiling point: 107 ° C) and diethyl carbonate (boiling point: 126 ° C), preferably diethyl carbonate (boiling point: 126 ° C).

The compounding ratio of the total amount of the acetate and the carbonate to the aliphatic hydrocarbon solvent having a boiling point of 80 ° C or more and less than 140 ° C is preferably 2:98 to 30:70 (mass ratio), more preferably 2:98. ~20:80 (mass ratio). When the compounding ratio of the total amount of the acetate and the carbonate to the aliphatic hydrocarbon solvent having a boiling point of 80 ° C or more and less than 140 ° C is less than 2:98 (mass ratio), it is difficult to apply the moisture-proof insulating coating after coating The speed of drying and the suppression of the dripping property coexist, which cannot be said to be good. Also, when the total amount of acetate and carbonate is 80 ° C or higher When the compounding ratio of the aliphatic hydrocarbon solvent having a boiling point of not higher than 140 ° C is more than 30:70 (mass ratio), the solubility of the thermoplastic elastomer may be lowered, which is not preferable.

Further, in the present specification, the "boiling point" means "the boiling point at 1 atmosphere" unless otherwise specified.

Applying the moisture-proof insulating coating of the present invention. The total light transmittance of the coating film produced by drying is 5% or less, preferably 3% or less, and more preferably 2% or less at a film thickness of 100 μm.

In addition, the "total light transmittance" described in the present specification means "the total light transmittance specified in JIS K-7105 "Test method for optical properties of plastics"".

When the film thickness of the coating film is 100 μm, in order to produce a moisture-proof insulating coating having a total light transmittance of 5% or less of the coating film, in the preparation of a coating containing a thermoplastic elastomer, two or more kinds of dyes and a solvent, the relative evaluation is performed. When the film thickness of the coating film is 100 μm, the total light transmittance of the coating film is 5% or less when the film thickness of the coating film is 100 μm or less in 100 parts by mass of the thermoplastic elastomer. composition. In the preparation of the moisture-proof insulating coating, the thermoplastic elastomer, two or more kinds of dyes, and, if necessary, a tackifier, an antioxidant, a leveling agent, an antifoaming agent, and a decane coupling agent may be dissolved in the solvent. (but only a part of the dispersion) is manufactured. The dissolution method is not particularly limited, and for example, a mixing rotor, a planetary mixer, a vibration machine, or the like can be used. Further, the temperature at the time of dissolution is not particularly limited, but is preferably in the range of 0 to 100 °C.

For the moisture-proof insulating coating of the invention (I), the addition of the tackifier may be Can and is better.

Further, the tackifier used in the present invention is a substance which is incorporated in a polymer compound typified by an elastomer having rubber elasticity and which has an adhesive function. Compared with a polymer compound typified by an elastomer, the molecular weight is much smaller, generally a compound having an oligomer range of a number average molecular weight of several hundred to several thousand, and has a glass state at room temperature, which does not show itself. The nature of rubber elasticity.

Examples of the tackifier include a rubber-based tackifier, an acrylic tackifier, a polyoxygen-based tackifier, a urethane-based tackifier, a petroleum resin-based tackifier, and a rosin ester-based adhesive. Adhesives, terpene resins are tackifiers, etc. Preferred examples thereof include petroleum resin-based tackifiers, and examples thereof include aliphatic aromatic copolymerized petroleum resins, partially hydrogenated aliphatic aromatic copolymerized petroleum resins, fully hydrogenated aliphatic aromatic copolymerized petroleum resins, and dicyclopentylene. Diene. Aromatic copolymerization of petroleum resin, partially hydrogenated dicyclopentadiene. Aromatic copolymerized petroleum resin, fully hydrogenated dicyclopentadiene. An aromatic copolymerized petroleum resin, an aromatic polymerized petroleum resin, a partially hydrogenated aromatic polymerized petroleum resin, a fully hydrogenated aromatic polymerized petroleum resin, or the like. These tackifiers may be used singly or in combination of two or more.

The ratio of the amount of the thermoplastic elastomer (the amount of the thermoplastic elastomer to the tackifier when the moisture-proof insulating coating contains the tackifier) is preferably 10 to 40% by mass based on the total amount of the moisture-proof insulating coating. . The ratio of the amount of the thermoplastic elastomer (when the moisture-proof insulating coating contains a tackifier, the total amount of the thermoplastic elastomer and the tackifier) is larger than 40% by mass, based on the total amount of the moisture-proof insulating coating, If the viscosity becomes too large, the viscosity will be over. If it is large, the handling property at the time of coating is deteriorated, and it cannot be said that it is preferable. Moreover, the ratio of the amount of the thermoplastic elastomer (when the moisture-proof insulating coating contains a tackifier, the total amount of the thermoplastic elastomer and the tackifier) is less than 10% by mass relative to the total amount of the moisture-proof insulating coating material When the concentration is too low, the thickness of the coating film after coating and drying is thinner than the thickness of the coating film required, which is not preferable.

When the moisture-proof insulating coating contains a tackifier, the mixing ratio of the thermoplastic elastomer to the tackifier is in the range of 2:1 to 10:1 by mass ratio, preferably 2.5:1 to 9.5:1. More preferably in the range of 3:1 to 9:1. When the ratio of the thermoplastic elastomer to the tackifier is more than 10:1 by mass ratio, it may not be sufficient to exhibit sufficient adhesive function. Further, when the mixing ratio of the thermoplastic elastomer to the tackifier is less than 2:1 by mass ratio, the tensile (fracture) strength of the coating film after drying is remarkably lowered. As a result, when the moisture-proof insulating film is removed by removing the defective part and re-joining the repair process of the new part correction, the moisture-proof insulating film is broken, and it is impossible to completely remove one film. Not suitable.

Furthermore, the moisture-proof insulating coating of the present invention preferably has a viscosity of 50 mPa at 25 ° C. Above s and 1500mPa. Below s, more preferably 1.200 mPa. s below. The viscosity at 25 ° C is more than 1500 mPa. When s is still large, the handling property at the time of coating is deteriorated, and it cannot be said that it is preferable. If the ratio is 50mPa. s is still small, the paint will flow before drying is completed after coating.

Further, the viscosity described in the present specification is a value measured by a DV-II+Pro viscometer small sample receiver (mandrel model: SC4-31) manufactured by Brookfield Corporation at a rotation number of 20 rpm at 25 °C.

For the moisture-proof insulating coating of the invention (I), an antioxidant may be added. Examples of the antioxidant include a phenolic antioxidant, a phosphite antioxidant, and a thioether antioxidant. Examples of the phenolic antioxidant include IRGANOX (registered trademark) 1010, IRGANOX (registered trademark) 1035, IRGANOX (registered trademark) 1076, IRGANOX (registered trademark) 1098, IRGANOX (registered trademark) 1135, and IRGANOX (registered trademark). 1330, IRGANOX (registered trademark) 1726, IRGANOX (registered trademark) 1425, IRGANOX (registered trademark) 1520, IRGANOX (registered trademark) 245, IRGANOX (registered trademark) 259, IRGANOX (registered trademark) 3114, IRGANOX (registered trademark) 5057 , IRGANOX (registered trademark) 565, IRGAMOD (registered trademark) 295, etc. Examples of the phosphite-based antioxidant include IRGAFOS (registered trademark) 168 and the like. Examples of the thioether-based antioxidant include IRGANOX (registered trademark) PS 800 FD, IRGANOX (registered trademark) PS 802 FD, and the like. These may be used singly or in combination of two or more.

For the moisture-proof insulating coating of the present invention (I), an additive such as a leveling agent, an antifoaming agent, a decane coupling agent or the like may be used as needed.

The leveling agent is not particularly limited as long as it has a function of improving the leveling property of the surface of the coating film by addition. Specifically, a polyether modified dimethyl polyoxyalkylene copolymer, a polyester modified dimethyl polyoxyalkylene copolymer, a polyether modified methyl alkyl polyoxyalkylene copolymer, an aralkyl may be used. A modified methyl alkyl polyoxyalkylene copolymer or the like. These may be used singly or in combination of two or more.

When the leveling agent is used, the amount of the leveling agent used is preferably 0.01 to 3 parts by mass based on 100 parts by mass of the moisture-proof insulating coating material of the invention (I). When the amount is less than 0.01 parts by mass, the addition effect of the leveling agent may not be exhibited. Moreover, when it is more than 3 parts by mass, depending on the kind of the leveling agent to be used, it may be sticky on the surface of the coating film or may deteriorate the insulating properties.

The antifoaming agent is not particularly limited as long as it has a function of eliminating or suppressing the occurrence or remaining bubbles when the moisture-proof insulating coating of the present invention (I) is applied. Examples of the antifoaming agent used in the moisture-proof insulating coating material of the present invention include polyfluorinated oils, fluorine-containing compounds, polycarboxylic acid-based compounds, polybutadiene-based compounds, and acetylene glycol-based compounds. Foaming agent. Specific examples thereof include BYK-077 (manufactured by BYK Chemical Co., Ltd.), SN Defoamer 470 (manufactured by SUNNOPCO Co., Ltd.), TSA750S (manufactured by MOMENTIVE PERFORMANCE MATERIALS, Japan), and polyoxygenated oil SH-203 (for example). A polyoxyl antifoaming agent such as Toray Dow Corning Co., Ltd., Dappo SN-348 (manufactured by SUNNOCO Co., Ltd.), Dappo SN-354 (manufactured by SUNNOCO Co., Ltd.), and Dappo SN-368 (manufactured by SUNNOPC Co., Ltd.) Acrylic polymer-based antifoaming agent such as Disperon 230HF (manufactured by Nakamoto Kasei Co., Ltd.), acetylene such as Surfynol DF-110D (manufactured by Nissin Chemical Industry Co., Ltd.), and Surfynol DF-37 (manufactured by Nissin Chemical Industry Co., Ltd.) A fluorinated polyfluorene-based defoaming agent such as a diol-based antifoaming agent or FA-630 (manufactured by Shin-Etsu Chemical Co., Ltd.). These may be used singly or in combination of two or more.

In general, 0.001 to 5 parts by mass may be added to 100 parts by mass of the moisture-proof insulating coating material of the invention (I). When it is less than 0.01 parts by mass, the effect of adding an antifoaming agent may not be exhibited. Moreover, when it is more than 5 parts by mass, depending on the type of the antifoaming agent to be used, it may be sticky on the surface of the coating film or may deteriorate the insulating properties.

A decane coupling agent can be used when it is required to apply the coating film formed by the moisture-proof insulating coating of the present invention (I) to a strong adhesion to glass or a metal oxide. The decane coupling agent is an organic ruthenium compound having both a functional group reactively bonded to an organic material and a functional group reactively bonded to an inorganic material in the molecule, and its structure is generally as shown in the following formula (1).

Here, the functional group in which Y is reactively bonded to an organic material may, for example, be a vinyl group, an epoxy group, an amine group, a substituted amine group, an acryloyl group, a methacryl group or a fluorenyl group. . The functional group in which X is reacted with an inorganic material is hydrolyzed by water or moisture to form a stanol. This stanol is reactively bonded to an inorganic material. Typical examples of X include an alkoxy group, an ethenyloxy group, and a chlorine atom. R ¹ is a divalent organic group, and R ² represents an alkyl group. a represents an integer from 1 to 3, and b represents an integer from 0 to 2. Only, a+b=3.

Examples of the decane coupling agent include 3-isocyanate propyl triethoxy decane, 3-isocyanate propyl trimethoxy decane, 3-isocyanate propyl methyl diethoxy decane, and 3-isocyanate group. Propylmethyl dimethyl Oxy decane, p-styryl trimethoxy decane, p-styryl triethoxy decane, vinyl trimethoxy decane, vinyl triethoxy decane, vinyl triisopropoxy decane, vinyl three (2-methoxyethoxy)decane, 3-propenyloxypropyltrimethoxydecane, 3-methylpropenyloxypropyltrimethoxydecane, 3-propenyloxypropyltriethyl Oxydecane, 3-methylpropenyloxypropyltriethoxydecane, 3-propenyloxypropylmethyldimethoxydecane, 3-methylpropenyloxypropylmethyldimethyl Oxydecane, 3-propenyloxypropylmethyldiethoxydecane, 3-methylpropenyloxypropylmethyldiethoxydecane, 2-(3,4-epoxycyclohexyl Ethyltrimethoxydecane, 3-glycidoxypropyltrimethoxydecane, 3-glycidoxypropylmethyldimethoxydecane, 3-glycidoxypropyltriethyl Oxydecane, 3-glycidoxypropylmethyldiethoxydecane, N-2-(aminoethyl)-3-aminopropylmethyldimethoxydecane, N-(2 -aminoethyl)-3-aminopropyltrimethoxydecane, N-(2-aminoethyl)-3- Propyl triethoxy decane, 3-aminopropyl trimethoxy decane, 3-aminopropyl triethoxy decane, 3-triethoxy decyl-N-(1,3-dimethyl -butylene)propylamine, N-phenyl-3-aminopropyltrimethoxydecane, 3-mercaptopropyltrimethoxydecane, 3-mercaptopropyltriethoxydecane, allyltrimethyl Oxydecane, etc.

Among these decane coupling agents, preferred is N-2-(aminoethyl)-3-aminopropylmethyldimethoxydecane, N-(2-aminoethyl)-3- Aminopropyltrimethoxydecane, N-(2-aminoethyl)-3-aminopropyltriethoxydecane, 3-aminopropyltrimethoxydecane, 3-aminopropyltri Ethoxy decane, 3-triethoxydecyl-N-(1,3-dimethyl-butylene) An amine group-containing decane coupling agent such as a base amine or N-phenyl-3-aminopropyltrimethoxydecane, such as 3-mercaptopropyltrimethoxydecane or 3-mercaptopropyltriethoxydecane Mercapto-containing decane coupling agent, 3-propenyloxypropyltriethoxydecane, 3-methylpropenyloxypropyltriethoxydecane, 3-propenyloxypropylmethyldimethoxy Baseline, 3-methacryloxypropylmethyldimethoxydecane, 3-propenyloxypropylmethyldiethoxydecane, 3-methylpropenyloxypropylmethyldi矽 偶 偶 KB KB KB KB KB KB KB KB KB KB KB KB KB KB KB KB KB KB KB KB KB KB KB KB KB KB KB KB KB KB KB KB KB KB , K-6-903 (manufactured by Shin-Etsu Chemical Co., Ltd.), Z-6062 (manufactured by Toray Dow Corning Co., Ltd.), Z-6023 (manufactured by Toray Dow Corning Co., Ltd.), and the like. These may be used alone or in combination of two or more.

In the moisture-proof insulating coating material of the present invention, the amount of the decane coupling agent is preferably from 01 to 10 by mass based on 100 parts by mass of the styrene-based thermoplastic elastomer in order to impart adhesion to a suitable glass substrate. More preferably, it is 0.5 to 8 parts by mass.

Next, the moisture-proof insulating material of the invention (II) will be described.

The invention (II) is a moisture-proof insulating material characterized by coating the moisture-proof insulating coating of the invention (I). Dry and get.

The moisture-proof insulating material of the invention (II) is coated with the moisture-proof insulating coating of the invention (I). The dried coating film can be obtained by dissolving a thermoplastic elastomer or a dye in a solvent (including a part of dispersion), and preparing the moisture-proof insulating coating material of the invention (I), which is obtained by drying after coating.

Next, the electronic component of the invention (III) will be described.

The invention (III) is an electronic component which is insulated by the moisture-proof insulating material of the invention (II).

The electronic component of the invention (III) can be applied to the electronic component by a commonly known method of dipping, brushing, spraying, line coating, bar coating, pouring, or the like. It is obtained by drying using natural drying, air drying, oven heating, or the like.

Examples of the electronic component of the invention (III) include a microcomputer, a transistor, a capacitor, a resistor, a relay, a transformer, and the like, and an assembled circuit board on which the above-described electronic components are mounted, and may also include leads to which the electronic components are bonded. , healds, film substrates, etc. Further, a signal input portion of a flat panel display panel such as a liquid crystal display panel, a plasma display panel, an organic electroluminescence panel, or an electroluminescence display panel may be used as an electronic component. In particular, the moisture-proof insulating material of the present invention can be preferably used in an IC peripheral portion such as a substrate for a display for electronic parts or a panel bonding portion.

[Examples]

Hereinafter, the present invention will be described by way of examples, but the invention is not limited thereto.

Example 1

Mix as styrene. Butadiene. Styrene block copolymerized elastomer D1155 (manufactured by CLAYTON Polymer Co., Ltd., styrene content 40% by mass) 23.78 g, Quintone (registered trademark) D100 as a tackifier 5.2 g of the aliphatic-aromatic copolymerized petroleum resin produced by ZEON Co., Ltd., KP PLAST RED G (Kiwa Chemical Co., Ltd., 蒽醌-based dye, color index number 60505) 0.165 g, KP PLAST YELLOW MK (anthraquinone dye manufactured by Kiha Chemical Industry Co., Ltd., color index number 58839) 0.118 g, Oil Blue 2N (anthraquinone dye manufactured by ORIENT Chemical Industry Co., Ltd., color index number 61554) 0.329 g, a solvent as a solvent 20.00 g of Cyclohexane (trade name: Suwaclean MCH, manufactured by Maruzen Petrochemical Co., Ltd.), 39.00 g of ethylcyclohexane (trade name: Suwaclean ECH, manufactured by Maruzen Petrochemical Co., Ltd.), n-butyl acetate (Kyowa fermentation chemical formula) The trade name of the company: butyl acetate-P) 11.00 g, which is the complex D1.

Example 2

Mix as styrene. Butadiene. In the styrene block copolymerized elastomer, D1155 (manufactured by CLAYTON Polymer Co., Ltd., styrene content: 40% by mass), 23.78 g, and Quintone (registered trademark) D100 as a tackifier (manufactured by Nippon Zeon Co., Ltd.) Polymeric petroleum resin) 5.22g, KP PLAST RED G (Kiwa Chemical Co., Ltd. 蒽醌-based dye, color index number 60505) 0.165g, KP PLAST YELLOW MK (Kyowa Chemical Industry Co., Ltd.) Dye, color index designation number 58839) 0.118g, KP PLAST BLUE GR (anthraquinone dye manufactured by Kiwa Chemical Industry Co., Ltd., color index number 61568) 0.329g, methylcyclohexane as solvent (Maruzen Petrochemical Co., Ltd.) Product Name: Suwaclean MCH) 20.00g 39.00 g of ethylcyclohexane (product name: Suwaclean ECH, manufactured by Maruzen Petrochemical Co., Ltd.) and 11.00 g of n-butyl acetate (trade name: butyl acetate-P, manufactured by Kyowa Chemical Co., Ltd.) were used as the complex D2.

Example 3

Mix as styrene. Butadiene. In the styrene block copolymerized elastomer, D1155 (manufactured by CLAYTON Polymer Co., Ltd., styrene content: 40% by mass), 23.78 g, and Quintone (registered trademark) D100 as a tackifier (manufactured by Nippon Zeon Co., Ltd.) Polymeric petroleum resin) 5.22g, KP PLAST RED HB (Kiwa Chemical Co., Ltd. 蒽醌-based dye, color indexing number 60510) 0.165g, KP PLAST YELLOW MK (Kyowa Chemical Industry Co., Ltd.) Dye, color index designation number 58839) 0.118g, Oil Blue 2N (anthraquinone dye by ORIENT Chemical Industry Co., Ltd., color indexing number 61554) 0.329g, methylcyclohexane as a solvent (made by Maruzen Petrochemical Co., Ltd.) Product name: Suwaclean MCH) 20.00 g, ethyl cyclohexane (trade name: Marwa Petrochemical Co., Ltd., product name: Suwaclean ECH) 39.00 g, n-butyl acetate (trade name: butyl acetate-P, manufactured by Kyowa Chemical Co., Ltd.) 11.00 g becomes the complex D3.

Example 4

Mix as styrene. Butadiene. Styrene block copolymerized elastomer D1155 (manufactured by CLAYTON Polymer Co., Ltd., styrene content 40 mass %) 23.78 g, Quintone (registered trademark) D100 (an aliphatic-aromatic copolymerized petroleum resin manufactured by Japan ZEON Co., Ltd.) as a tackifier, 5.22 g, KP PLAST RED HB as a dye (manufactured by Kihe Chemical Industry Co., Ltd.) Anthraquinone dye, color index designation number 60510) 0.165g, KP PLAST YELLOW MK (Yuhe Chemical Co., Ltd. 蒽醌 dye, color index number 58839) 0.118g, Oil Blue 2N (made by ORIENT Chemical Industry Co., Ltd.) Anthraquinone dye, color index designation number 61554), 0.329 g, methylcyclohexane (product name: Suwaclean MCH, manufactured by Maruzen Petrochemical Co., Ltd.), 20.00 g of ethyl hexane Name: Suwaclean ECH) 39.00 g, diethyl carbonate (trade name: Mitsui Chemicals Co., Ltd., trade name: butyl acetate-P) 11.00 g, and it is a complex D4.

Example 5

Mix as styrene. Butadiene. In the styrene block copolymerized elastomer, D1155 (manufactured by CLAYTON Polymer Co., Ltd., styrene content: 40% by mass), 23.78 g, and Quintone (registered trademark) D100 as a tackifier (manufactured by Nippon Zeon Co., Ltd.) Polymeric petroleum resin) 5.22g, KP PLAST RED HB as a dye (anthraquinone dye manufactured by Kiha Chemical Industry Co., Ltd., color indexing number 60510) 0.165g, KP PLAST YELLOW MK (Kiwa Chemical Industry Cognac dye, Color index setting number 58839) 0.118g, Oil Blue 2N (anthraquinone dye by ORIENT Chemical Industry Co., Ltd., color index number 61554) 0.329g, methylcyclohexane as solvent (Maruzen Petrochemical Co., Ltd.) In the product name: Suwaclean MCH), 20.00 g, ethylcyclohexane (trade name: Suwaclean ECH, manufactured by Maruzen Petrochemical Co., Ltd.), 50.00 g, was used as the complex D5.

Example 6

Mix as styrene. Butadiene. In the styrene block copolymerized elastomer, D1155 (manufactured by CLAYTON Polymer Co., Ltd., styrene content: 40% by mass), 23.78 g, and Quintone (registered trademark) D100 as a tackifier (manufactured by Nippon Zeon Co., Ltd.) Polymeric petroleum resin) 5.22g, KP PLAST RED G as a dye (Kiwa Chemical Industry Cognac dye, color index number 60505) 0.165g, KP PLAST YELLOW G (Jihe Chemical Industry Co., Ltd. Color index setting number 48160) 0.118g, Oil Blue 2N (anthraquinone dye by ORIENT CHEMICAL CO., LTD., color indexing number 61554) 0.329g, methylcyclohexane as a solvent (Maruzen Petrochemical Co., Ltd.: commodity Name: Suwaclean MCH) 50.00 g of ethylcyclohexane (trade name: Suwaclean ECH, manufactured by Maruzen Petrochemical Co., Ltd.) was used as the complex D6.

Example 7

Mix as styrene. Butadiene. In the styrene block copolymerized elastomer, D1155 (manufactured by CLAYTON Polymer Co., Ltd., styrene content: 40% by mass), 23.78 g, KP PLAST RED HB, which is a dye, and the color index number. 60510) 0.165g, KP PLAST YELLOW MK (anthraquinone dye manufactured by Kiwa Chemical Industry Co., Ltd., color index number 58839) 0.118g, Oil Blue 2N (anthraquinone dye manufactured by ORIENT Chemical Industry Co., Ltd., color index number 61554) 0.329 g, 20.00 g of methylcyclohexane (product name: Suwaclean MCH, manufactured by Maruzen Petrochemical Co., Ltd.), ethylcyclohexane (trade name: Suwaclean ECH, manufactured by Maruzen Petrochemical Co., Ltd.) 39.00 g, n-butyl acetate The ester (trade name: butyl acetate-P, manufactured by Kyowa Fermentation Chemical Co., Ltd.) was 11.00 g, and it was a complex D7.

Example 8

Mix as styrene. Butadiene. In the styrene block copolymerized elastomer, D1155 (manufactured by CLAYTON Polymer Co., Ltd., styrene content: 40% by mass), 23.78 g, and Quintone (registered trademark) D100 as a tackifier (manufactured by Nippon Zeon Co., Ltd.) Polymeric petroleum resin) 5.22g, KP PLAST RED HB (Kiwa Chemical Co., Ltd. 蒽醌-based dye, color indexing number 60510) 0.283g, Oil Blue 2N (ORIENT Chemical Industry Co., Ltd. 蒽醌-based dye) Color index number: 61554), 0.329 g, methylcyclohexane (product name: Suwaclean MCH, manufactured by Maruzen Petrochemical Co., Ltd.), 20.00 g, and ethylcyclohexane (trade name: Suwaclean, Maruzen Petrochemical Co., Ltd.) ECH) 39.00 g and n-butyl acetate (trade name: butyl acetate-P, manufactured by Kyowa Chemical Co., Ltd.) of 11.00 g, and was a complex D8.

Comparative example 1

Mix as styrene. Butadiene. In the styrene block copolymerized elastomer, D1155 (manufactured by CLAYTON Polymer Co., Ltd., styrene content: 40% by mass), 23.78 g, and Quintone (registered trademark) D100 as a tackifier (manufactured by Nippon Zeon Co., Ltd.) 5.2 g of a polymerized petroleum resin), KP PLAST BLUE GR (a phthalocyanine dye manufactured by Kawasaki Chemical Co., Ltd., color index number 61568), 0.548 g, and methylcyclohexane as a solvent (Maruzen Petrochemical Co., Ltd.) Product name: Suwaclean MCH) 20.00 g, ethyl cyclohexane (manufactured by Maruzen Petrochemical Co., Ltd.: trade name: Suwaclean ECH) 39.00 g, n-butyl acetate (trade name: butyl acetate) P) 11.00 g is the complex E1.

Comparative example 2

Mix as styrene. Isoprene. D1161 (manufactured by CLAYTON Polymer Co., Ltd., styrene content: 15% by mass, D1107 equivalent) of styrene block copolymerized elastomer, P-100 (manufactured by Idemitsu Kosan Co., Ltd., hydrogenated bicyclic ring) Pentadiene. Aromatic copolymerized petroleum resin) 10.00 g, OIL BLACK NO. 5 as a dye (manufactured by ORIENT Chemical Industry Co., Ltd.) The dye was used, and the color index number: 50415) was 5.00 g, and 70.00 g of ethylcyclohexane (trade name: Suwaclean ECH, manufactured by Maruzen Petrochemical Co., Ltd.) as a solvent was used as the complex E2.

Comparative example 3

Mix as styrene. Butadiene. Styrene block copolymerized elastomer D1155 (manufactured by CLAYTON Polymer Co., Ltd., styrene content: 40% by mass), 23.78 g, Quintone (registered commercial building) D100 as a tackifier (Aromatic-aromatic manufactured by Japan ZEON Co., Ltd.) Copolymerization of petroleum resin) 5.22g, OIL BLACK NO.5 as a dye (manufactured by ORIENT Chemical Industry Co., Ltd.) The dye is a color index index: 50,415), 0.165 g, methylcyclohexane (product name: Suwaclean MCH, manufactured by Maruzen Petrochemical Co., Ltd.), 20.00 g, and ethylcyclohexane (trade name, Maruzen Petrochemical Co., Ltd.) : Suwaclean ECH) 39.00 g, n-butyl acetate (trade name: butyl acetate-P, manufactured by Kyowa Chemical Co., Ltd.), 11.00 g, and was a complex E3.

[Evaluation of complexes]

The characteristics of the complexes D1 to D8 and E1 to E3 prepared according to the above composition were evaluated by the methods shown below. The results are shown in Table 1.

<Measurement of viscosity>

The viscosity was measured by the following method.

Using a sample of 10 mL, using a viscometer (manufactured by Brookfield, model: DV-II+Pro), using a small amount of sample holder and a mandrel of model C4-31, the viscosity was measured at a temperature of 25.0 ° C and a number of revolutions of 20 rpm. A roughly constant value.

<With or without the evaluation of the silkiness>

The presence or absence of the spinnability was evaluated by the following method.

Using the dispenser, each of the complexes D1 to D8 and the complexes E1 to E3 was applied to the glass so that the thickness after drying became about 130 μm. At the end of the coating, it was judged whether or not the coating liquid was from the front end of the dispenser. Become silky.

◎: No filamentous coating liquid occurred at all

○: There is a case where a silky coating liquid is generated, and there is a case where it does not occur.

×: A filament-like coating liquid often occurs.

<No sticky time evaluation:>

The non-stick time is evaluated by the following method.

Using the dispenser, the complexes D1 to D8 and the complexes E1 to E3 were each applied to the glass so that the thickness after drying became about 200 μm, and after coating, the surface of the coating film was confirmed by finger contact every 30 seconds. Sticky. The initial time when the stickiness disappeared was regarded as the non-stick time.

The indicator of fast drying without sticking time is as short as possible.

<Measurement of total light transmittance>

The total light transmittance was measured by the following method.

The complexes D1 to D8 and the complexes E1 to E3 are each coated on a Teflon (registered trademark) plate so that the thickness after drying becomes about 100 μm. A self-standing film was produced by repeat coating by using a bar coater.

By color. The turbidity simultaneous measuring device COH400 (JIS K-7105, manufactured by Nippon Denshoku Industries Co., Ltd.) was used to measure the total light transmittance of the self-standing films.

<Evaluation of long-term electrical insulation reliability using flexible substrates>

The shape of the fine comb-shaped shape described in JPCA-ET01 manufactured by etching a flexible copper-clad laminate (Sumitomo Metal Mine Co., Ltd., grade: Esperflex, copper thickness: 8 μm, polytheneimide thickness: 38 μm) The substrate (the copper wiring width / the copper wiring width = 15 μm / 15 μm) was coated on the flexible wiring board subjected to the tin plating treatment, and the composites D1 to D8 and E1 to E3 were applied so that the thickness after drying was 100 μm. After maintaining at room temperature for 10 minutes, it was dried at 70 ° C for 1.5 hours.

Using this test piece, a temperature and humidity constant test under the conditions of a temperature of 110 ° C and a humidity of 85% RH was applied using a test piece of 30 V, and MIGRATION TESTER MODEL MIG-8600 (manufactured by IMV Corporation) was used. The resistance values after 10, 100, and 200 hours from the start of the above constant temperature and humidity test were measured.

As is clear from the results of Table 1, the complexes D1 to D8 of Examples 1 to 8 have high concealability to visible light and excellent long-term insulation reliability. With respect to this, the complexes E1 to E3 of Comparative Examples 1 to 3 have low concealability to visible light. Further, the complex E2 of Comparative Example 2 was also low in long-term insulation reliability. Further, the complex E2 of Comparative Example 2 was not sticky for a long period of time. That is, it is understood that the composition of the present invention is suitable for use as a moisture-proof insulating material which is coated with a dispenser and has a concealing property.

[Industry use possibility]

The moisture-proof insulating material of the present invention has high concealability to visible light and has a long-term insulation reliability. By coating the moisture-proof insulating material, it is possible to prevent light leakage of the backlight or the like. Electronic parts protected by highly moisture-proof insulation.

Claims (12)

The invention relates to a moisture-proof insulating coating which is a moisture-proof insulating coating containing a thermoplastic elastomer, two or more kinds of dyes and a solvent, and is characterized in that the coating material is coated. The total light transmittance of the coating film produced by drying is 5% or less at a film thickness of 100 μm. The moisture-proof insulating coating according to the first aspect of the invention, wherein the blending ratio of the dye to the thermoplastic elastomer is in the range of 0.1 to 10 parts by mass based on 100 parts by mass of the thermoplastic elastomer. A moisture-proof insulating coating according to claim 1 or 2, wherein the thermoplastic elastomer is a styrene-based thermoplastic elastomer. The moisture-proof insulating coating material according to any one of the items 1 to 3, wherein at least one of the two or more dyes is an anthraquinone dye. The moisture-proof insulating coating according to any one of claims 1 to 4, wherein the solvent contains an aliphatic hydrocarbon solvent having a boiling point of 80 ° C or more and less than 140 ° C. For example, the moisture-proof insulating coating of claim 5, wherein the solvent further contains acetate and/or carbonate. The moisture-proof insulating coating according to any one of claims 1 to 6, wherein the amount of the thermoplastic elastomer is relative to the total amount of the moisture-proof insulating coating (the moisture-proof insulating coating contains thermoplasticity when the tackifier is contained) The ratio of the body to the total amount of the tackifier is 10 to 40% by mass. For example, the moisture-proof insulating coating of any one of the claims 1 to 7 has a viscosity at 25 ° C of 1500 mPa. s below. For example, the moisture-proof insulating coating of any one of the claims 1 to 8 It also contains a tackifier. For example, the moisture-proof insulating coating of the ninth application patent scope, wherein the tackifier is a petroleum resin-based tackifier. A moisture-proof insulating material characterized by coating a moisture-proof insulating coating according to any one of claims 1 to 10. Dry and get. An electronic component insulated by a moisture-proof insulating material as claimed in claim 11.