TW201536839A - Solvent for dissolving silicone - Google Patents

Abstract

Provided are: a solvent which is extremely safe and which has outstanding silicone solubility; and a silicone composition containing the solvent and silicone. This solvent for dissolving silicone is characterized by containing one or more solvents (A) represented by formula (a-1) or formula (a-2). CH3-O-R1(a-1) CH3-C(=O)O-R2(a-2)(in the formula, R1 and R2 may be the same or different, and represent C3-11 alkyl groups or cycloalkyl groups which may contain ether bonds.

Description

Polyoxyl solvent

The present invention relates to a solvent excellent in solubility of polyfluorene oxide used in the production of an optical element and an electronic component, and a polyfluorene-oxygen composition containing the solvent and polyfluorene oxide. The present application claims the priority of Japanese Patent Application No. 2014-022010, filed on Jan. 7, 2014, and the content of which is hereby incorporated herein.

In addition, the inorganic glass can be used as a structure that allows visible light to pass through while separating the space without impeding visibility, because it has high transparency, heat resistance, and dimensional stability, and can be used in a wide range of industrial fields. Although it is an inorganic glass which has such an outstanding characteristic, it has the problem that the specific gravity is as high as 2.5 or more, it is not easy to be impact-resistant, it is easy to break, and it is expensive in processing. In recent years, in many industrial fields, the weight reduction and thinning of products have become a problem, and therefore, an inorganic glass substitute material that can solve the above problems has been sought.

In the case of inorganic glass substitute materials which can solve the above problems, transparent thermoplastic plastics and thermosetting plastics are known. Examples of the transparent thermoplastic plastic include polymethyl methacrylate, polycarbonate, and the like. Among them, polymethyl methacrylate is easy to process, lightweight, and excellent in transparency and impact resistance. However, compared to inorganic glass, thermoplastic The plastics are obviously inferior in heat resistance, and there are problems in that the use is limited.

Examples of the transparent thermosetting plastic include an epoxy resin, a (meth) acrylate resin, and polyfluorene oxide. These have higher heat resistance than thermoplastics. However, the epoxy resin is liable to cause yellowing and cracking due to heat and ultraviolet rays, and the impact resistance of the molded article is low (i.e., brittle). Further, the (meth) acrylate resin is easy to process, and is excellent in heat resistance and impact resistance, but has a problem that it is easy to absorb water and has a large dimensional change rate.

On the other hand, polyoxymethylene is expected to be used as an alternative to inorganic glass because it is easy to process and lightweight, and is excellent in transparency, heat resistance, dimensional stability, impact resistance, weather resistance, and water resistance. The polyfluorene oxide is used for an optical material, an electronic material, or the like, and is specifically used for a molded member of an LED element (Patent Documents 1 and 2), a color filter material (Patent Document 3), and the like.

When polyfluorene oxygen is used as an optical material, an electronic material, or the like, it is generally used in a state of being dissolved in a solvent, and as a solvent of polyfluorene oxygen, toluene and xylene may be used, which are because of a substance of high concern. (SVHC: Substances of Very High Concern) is limited in terms of use, and therefore, it is required to have a solvent which is excellent in solubility of polyfluorene oxygen and which is excellent in safety.

[Previous Technical Literature] [Patent Literature]

Patent Document 1: Japanese Patent Laid-Open No. Hei 10-228249

Patent Document 2: Japanese Patent Laid-Open No. Hei 10-242513

Patent Document 3: Japanese Laid-Open Patent Publication No. 2000-123981

Accordingly, an object of the present invention is to provide a solvent which is excellent in safety and which is excellent in polyoxymethylene solubility.

Another object of the present invention is to provide a composition comprising the above solvent and polyfluorene oxide.

In order to solve the above problems, the inventors of the present invention have conducted intensive studies and found that the solvent represented by the following formula (a-1) or the following formula (a-2) is not a target of SVHC, and is excellent in safety even in the case of High polyoxyl solubility also appeared at room temperature. Further, it has been found that when it is used in an optical material and an electronic material in general, it can be used for an optical material and an electronic material, and the coating property and drying property can be further improved. The present invention has been completed in light of these findings.

In other words, the present invention provides a solvent for dissolving polyoxymethane, which comprises one or more solvents (A) represented by the following formula (a-1) or the following formula (a-2), CH ₃ -OR ¹ (a-1)

CH ₃ -C(=O)OR ² (a-2)

In the formula, R ¹ and R ² are the same or different and each represents an alkyl group or a cycloalkyl group having 3 to 11 carbon atoms which may have an ether bond.

Further, the present invention provides the solvent for dissolving polyadenine as described above, wherein the solvent (A) is ethylene glycol dimethyl ether, diethylene glycol methyl butyl Ether, propylene glycol methyl n-propyl ether, propylene glycol methyl n-butyl ether, propylene glycol methyl isoamyl ether, dipropylene glycol dimethyl ether, dipropylene glycol methyl n-propyl ether, dipropylene glycol methyl n-butyl ether At least one solvent selected from the group consisting of dipropylene glycol methyl isoamyl ether, dipropylene glycol methylcyclopentyl ether, cyclopentyl methyl ether, cyclohexyl methyl ether and cyclohexanol acetate.

Further, the present invention provides the solvent for dissolving polyfluorene as described above, wherein the solvent (A) is dipropylene glycol methyl n-butyl ether and/or cyclohexyl methyl ether.

Further, the present invention provides a polyfluorene oxygen composition comprising the above-mentioned solvent for dissolving polyoxymethylene and polyfluorene oxide.

Further, the present invention provides the polyfluorene oxygen composition as described above, wherein the polyfluorene oxide is a linear or cyclic organopolyoxane having a repeating unit represented by the following formula (1),

Further, the present invention provides the polyfluorene oxygen composition as described above, wherein the polyfluorene oxide is a linear or cyclic vinyl group-containing polydimethyloxane.

That is, the present invention relates to the following.

[1] A solvent for dissolving polyoxane, which comprises one or more solvents (A), CH ₃ - represented by the following formula (a-1) or the following formula (a-2); OR ¹ (a-1)

CH ₃ -C(=O)OR ² (a-2)

In the formula, R ¹ and R ² are the same or different and each represents an alkyl group or a cycloalkyl group having 3 to 11 carbon atoms which may have an ether bond.

[2] The solvent for dissolving polysiloxane according to [1], wherein the solvent represented by the formula (a-1) is a solvent represented by the following formula (a-1)', CH ₃ -O-(RO) _n -R'(a-1)'

In the formula, R represents an alkylene group having 1 to 3 carbon atoms, R' represents an alkyl group having 1 to 11 carbon atoms or a cycloalkyl group having 3 to 8 members, and n is an integer of 0 to 3.

[3] The solvent for dissolving polyoxyl oxide according to [1], wherein the solvent (A) is ethylene glycol dimethyl ether, diethylene glycol methyl butyl ether, propylene glycol methyl n-propyl ether, propylene glycol. Methyl n-butyl ether, propylene glycol methyl isoamyl ether, dipropylene glycol dimethyl ether, dipropylene glycol methyl n-propyl ether, dipropylene glycol methyl n-butyl ether, dipropylene glycol methyl isoamyl ether, two At least one solvent selected from the group consisting of propylene glycol methylcyclopentyl ether, cyclopentyl methyl ether, cyclohexyl methyl ether, and cyclohexanol acetate.

[4] The solvent for dissolving polyoxymethylene according to [1], wherein the solvent (A) is dipropylene glycol methyl n-butyl ether and/or cyclohexyl methyl ether.

[5] The solvent for dissolving polyoxymethane according to any one of [1] to [4], which contains 5 to 100% by weight of a solvent (A) of the total amount of the solvent for dissolving polyfluorene oxide (100% by weight). .

[6] The solvent for dissolving polyoxo oxygen according to any one of [1] to [5] wherein the solubility of the polyfluorene oxygen at room temperature (15 to 30 ° C) is 100% by weight relative to the solvent for dissolving polyoxyl The part is 42 parts by weight or more and less than 300 parts by weight.

[7] A polyoxymethane composition according to any one of [1] to [6], wherein the solvent for dissolving polyfluorene oxygen and polyfluorene oxygen are contained.

[8] The polyfluorene oxide composition according to [7], wherein the polyfluorene oxide is a linear or cyclic organopolyoxane having a repeating unit represented by the formula (1).

[9] The polyfluorene oxide composition according to [7], wherein the polyfluorene oxide is a linear or cyclic vinyl group-containing polydimethyloxane.

[10] The polyfluorene oxide composition according to any one of [7] to [9] wherein the content of the polyfluorene oxygen is 42 parts by weight or more and less than 300 parts by weight based on 100 parts by weight of the solvent for polyoxymethylene dissolution. Parts by weight.

[11] The polyfluorene oxide composition according to any one of [7] to [10] wherein the content of the solvent for dissolving polyfluorene oxide in the polyfluorene oxide composition is from 30 to 90% by weight.

[12] The polyfluorene composition according to any one of [7] to [11] wherein the viscosity at 25 ° C (measured using an E-type viscometer, rotator: 1° 34' × R24, number of rotations : 10 rpm) is 1 to 400 cp.

The solvent for dissolving polyfluorene oxygen of the present invention is not a target of SVHC, and is excellent in safety, and can dissolve polyfluorene at a high concentration even at room temperature. Further, it is possible to form a polyfluorene oxide composition having a low viscosity and excellent workability and capable of forming a thick film of a polyfluorene oxide member. Therefore, the polyfluorene oxide composition obtained by dissolving polyfluorene oxygen in the solvent for dissolving polyfluorene oxygen of the present invention can be suitably used as, for example, a sealing material, a solid crystal material, a barrier material, and an optical waveguide used in the manufacture of an LED device. The material for forming the road and the lens; the packaging material, the potting material, the coating material used in the manufacture of the PCB (Printed Circuit Board), and the heat dissipation material used in the electronic control unit of the automobile.

[Polymer for dissolving oxygen]

The solvent for dissolving polyfluorene oxygen of the present invention contains one or more solvents (A), CH ₃ -OR ¹ represented by the following formula (a-1) or the following formula (a-2) ( A-1)

CH ₃ -C(=O)OR ² (a-2)

In the formula, R ¹ and R ² are the same or different and each represents an alkyl group or a cycloalkyl group having 3 to 11 carbon atoms which may have an ether bond.

The -R ¹ group and the -R ² group are an alkyl group having 3 to 11 carbon atoms or a cycloalkyl group which may have an ether bond, and more specifically, those represented by the following formula (r).

-(RO) _n -R' (r)

In the formula, R represents an alkylene group, R' represents an alkyl group or a cycloalkyl group, and n represents an integer of 0 or more.

The above-mentioned R-system may, for example, be a linear or branched alkyl group having 1 to 3 carbon atoms such as a methylene group, an ethylidene group, a methyl ethyl group or a trimethylene group.

The above R' may, for example, be a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a secondary butyl group, a tertiary butyl group, a pentyl group, an isopentyl group, a hexyl group or a fluorene group. Alkyl groups having a carbon number of from 1 to 11 (preferably from 1 to 10, more preferably from 1 to 4), such as a group, an eleven group, or the like; a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, or a cyclooctyl group; Wait 3 to 8 members (preferably 5 to 7 members) for the cycloalkyl group.

The above n is an integer of 0 or more, preferably an integer of 1 to 3.

The solvent represented by the formula (a-1) may, for example, be cyclopentyl methyl ether, cyclohexyl methyl ether, (di)propylene glycol dimethyl ether or (di)propylene glycol methyl ethyl ether. (2) Propylene glycol methyl propyl ether, (di) propylene glycol Methyl butyl ether, (di) propylene glycol methyl amyl ether, (di) propylene glycol methyl isoamyl ether, (di) propylene glycol methyl cyclopentyl ether, (di) ethylene glycol dimethyl ether, ( 2) ethylene glycol methyl ethyl ether, (di) ethylene glycol methyl propyl ether, (di) ethylene glycol methyl butyl ether, (b) ethylene glycol methyl amyl ether, (b) Ethylene glycol methyl isoamyl ether, (di) ethylene glycol methyl cyclopentyl ether, and the like. In the present specification, "(di)propylene glycol" means "propylene glycol" and "dipropylene glycol", and "(di)ethylene glycol" means "ethylene glycol" and "diethylene glycol".

The solvent represented by the formula (a-2) may, for example, be cyclopentanol acetate, cyclohexanol acetate, (ii) propylene glycol monomethyl ether acetate, or (ii) propylene glycol monoethyl bromide. Ethyl acetate, (di)propylene glycol monopropyl ether acetate, (ii) propylene glycol monobutyl ether acetate, (ii) propylene glycol monopentyl ether acetate, (di) propylene glycol monoisoamyl Ether acetate, (di)propylene glycol monocyclopentyl ether acetate, (di)ethylene glycol monomethyl ether acetate, (di)ethylene glycol monoethyl ether acetate, (b) Glycol monopropyl ether acetate, (di)ethylene glycol monobutyl ether acetate, (di)ethylene glycol monopentyl ether acetate, (di)ethylene glycol monoisoamyl ether An acid ester, (di)ethylene glycol monocyclopentyl ether acetate, and the like.

In the solvent (A) of the present invention, it is preferred to use ethylene glycol dimethyl ether, diethylene glycol methyl n-butyl ether, propylene glycol methyl n-propyl ether, propylene glycol methyl Butyl ether, propylene glycol methyl isoamyl ether, dipropylene glycol dimethyl ether, dipropylene glycol methyl n-propyl ether, dipropylene glycol methyl n-butyl ether, dipropylene glycol methyl isoamyl ether, dipropylene glycol methyl At least one selected from the group consisting of cyclopentyl ether, cyclopentyl methyl ether, cyclohexyl methyl ether and cyclohexanol acetate.

The solvent (A) of the present invention preferably contains at least dipropylene glycol methyl n-butyl ether and/or cyclohexyl methyl ether from the viewpoint of excellent solubility of polyfluorene oxide.

The content of the solvent (A) in the solvent for dissolving polyoxyl (100% by weight) (the total amount of the solvent (A) when it is contained in combination of two or more) is preferably 5% by weight or more (for example, 5 to 100% by weight). 10% by weight or more (for example, 10 to 100% by weight) is more preferable, 50% by weight or more (for example, 50 to 100% by weight) is particularly preferable, and 80% by weight or more (for example, 80 to 100% by weight) is most preferable. When the content of the solvent (A) is less than the above range, the solubility of polyoxymethylene tends to decrease.

(solvent (B))

The solvent for dissolving polyfluorene oxygen of the present invention may be a solvent which can be generally used for an electronic material, or a solvent which is compatible with the above solvent (A), in addition to the above solvent (A) (=solvent (B) )).

The solvent (B) may, for example, be: (mono, di-, tri) alkanediol monoalkyl ether, (mono, di) alkanediol dialkyl ether, (mono, di) alkanediol di Acid ester, C _1-12 alkyl acetate, C _3-6 alcohol, C _3-6 alkanediol, C _3-6 alkanediol monoalkyl ether, C _3-6 alkanediol diacetate , triacetin, hydroxycarboxylate, hydroxycarboxylic acid diester, alkoxycarboxylate, cyclic ketone, lactone, cyclic ether, decylamine, pyridine, aromatic acetate, amine Classes, etc. These may be used alone or in combination of two or more.

The above (mono, di, and tri) alkanediol monoalkyl ether is preferably a (mono, di, or tri) C _1-3 alkanediol mono C _1-20 alkyl ether, and for example, : ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol n-propyl ether, ethylene glycol n-butyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, two Ethylene glycol n-propyl ether, diethylene glycol n-butyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol n-propyl ether, propylene glycol n-butyl ether, dipropylene glycol monomethyl ether, dipropylene glycol single B Alkyl ether, dipropylene glycol n-propyl ether, dipropylene glycol n-butyl ether, tripropylene glycol monomethyl ether, tripropylene glycol n-butyl ether, and the like.

The above (mono and di)alkylene glycol dialkyl ether is preferably a (mono and di)C _1-3 alkanediol di C _1-20 alkyl ether, and examples thereof include ethylene glycol. Diethyl ether, ethylene glycol dipropyl ether, ethylene glycol dibutyl ether, propylene glycol diethyl ether, propylene glycol dipropyl ether, propylene glycol dibutyl ether, diethylene glycol diethyl ether, diethyl Glycol dipropyl ether, diethylene glycol dibutyl ether, dipropylene glycol diethyl ether, dipropylene glycol dipropyl ether, dipropylene glycol dibutyl ether, and the like.

In the above (mono and di) alkanediol diacetate, preferred are (mono and di)C _1-3 alkanediol diacetates, and examples thereof include ethylene glycol diacetate. , diethylene glycol diacetate, propylene glycol diacetate, dipropylene glycol diacetate, and the like.

The above C _1-12 alkyl acetate may, for example, be methyl acetate, ethyl acetate, propyl acetate, butyl acetate, pentyl acetate, Hexyl acetate, heptyl acetate, octyl acetate, thioglycolate, dodecyl acetate, and the like.

The above C _3-6 alcohol may, for example, be n-propanol, isopropanol, n-butanol, secondary butanol, tertiary butanol, n-pentanol, n-hexanol or 2-hexanol. .

The C _3-6 alkanediol may, for example, be 1,3-butanediol, 1,4-butanediol or 1,6-hexanediol.

The C _3-6 alkanediol monoalkyl ether is preferably a C _3-6 alkanediol mono C _1-3 alkyl ether, and examples thereof include 3-methoxybutanol.

The above C _3-6 alkanediol diacetate may, for example, be 1,3-butanediol diacetate, 1,4-butanediol diacetate or 1,6- Hexanediol diacetate or the like.

The hydroxycarboxylic acid ester is preferably a C _1-3 alkyl hydroxycarboxylate, and examples thereof include methyl lactate and ethyl lactate.

The hydroxycarboxylic acid diester may, for example, be lactic acid methyl acetate or lactic acid ethyl acetate.

The above alkoxycarboxylate is preferably a C _1-3 alkoxy carboxylic acid C _1-3 alkyl ester, and examples thereof include methyl methoxypropionate and ethoxy propionic acid. Ethyl ester and the like.

The cyclic ketone is preferably a 3- to 8-membered cyclic ketone, and examples thereof include cyclopentanone, cyclohexanone, and 4-ketoisophorone.

The above lactones may, for example, be β-butyrolactone, γ-butyrolactone, ε-caprolactone, δ-valerolactone, γ-valerolactone, α-ethenyl- Γ-butyrolactone and the like.

The cyclic ether may, for example, be tetrahydrofuran, tetrahydrofurfuryl alcohol or tetrahydrofurfuryl acetate.

The above guanamines may, for example, be dimethylformamide or the like.

The pyridine may, for example, be pyridine or methylpyridine.

The aromatic acetate may, for example, be phenyl acetate or the like.

The above amines may, for example, be diethylamine, Triethylamine and the like.

In the present invention, by using the solvent (A) and the solvent (B) in combination, it is possible to form a polyfluorene having a high concentration and containing polyfluorene, and having excellent coatability, drying property, safety, dispersibility, solubility, and the like. Composition.

In order to further improve the coating property, it is effective to use one or a combination of two or more kinds of the above (mono, di, and tri) alkanediol monoalkyl ethers, (mono, di) alkanediol dialkyl ethers, ( The solvent selected for the mono- and di-alkylene diacetate, C _7-12 alkyl acetate, and alkoxy carboxylate.

In order to further improve the solubility of the dye, it is effective to use one or a combination of two or more kinds of mono C _3-6 alkanediol monoalkyl ethers such as propylene glycol monomethyl ether, and C _3-6 alkanediol monoalkane. A solvent selected from the group consisting of a base ether, a hydroxycarboxylic acid ester, a hydroxycarboxylic acid diester, a C _3-6 alcohol, and a C _3-6 alkanediol.

In order to further improve the drying property, it is effective to use one type or a combination of two or more kinds of C _1-6 alkyl acetates.

In the case where the solvent (A) and the solvent (B) are used in combination, the mixing ratio (the former/the latter (weight ratio)) is, for example, 5/95 to 99/1, preferably 10/90 to 99/1. When the ratio of the solvent (A) to the solvent (B) is less than the above range, the solubility of polyfluorene oxide tends to decrease. In addition, in the case where two or more types of solvents (A) are used in combination, the total amount thereof is used. The same is true for the solvent (B).

Since the solvent for dissolving polyfluorene oxygen of the present invention contains the solvent (A), it has high polyoxyl solubility even at relatively low temperatures. For example, the polyoxyl solubility at room temperature is, for example, about 42 parts by weight or more and less than 300 parts by weight, preferably 100 parts by weight or more and less than 300 parts by weight, based on 100 parts by weight of the solvent for polyoxymethylene dissolution. Very good for 180 More than 280 parts by weight or less by weight.

[Polyoxygenated composition]

The polyfluorene oxide composition of the present invention is characterized by comprising the above-mentioned solvent for dissolving polyfluorene oxygen and polyfluorene oxide.

The polyfluorene oxide of the present invention may, for example, be a linear or cyclic organopolyoxane having a repeating unit represented by the following formula (1).

The polyoxymethylene system may be used alone or in combination of two or more.

Specific examples of the polyfluorene oxide of the present invention include a linear or cyclic polydimethyl siloxane, a vinyl-containing polydimethyl siloxane, and a phenyl group-containing poly 2 . Methyl decane, and a fluorine-containing polydimethyl siloxane.

Further, the polyfluorene oxide of the present invention may be a condensation reaction type polyfluorene oxygen or an addition reaction type polyoxane. In the present invention, the addition reaction type polyfluorene does not generate by-products (exhaust gas) during curing, and is a coating film having a uniform surface layer thickness and excellent flatness. good.

For the purpose of the present invention, such as the trade names "KE-106", "KE-1600", "KE-1603", "KE-1606", "KE-1310ST", "KE-1300T", "KE-" can be used. 1314", "KE-1241", "KE-103" (above is Shin-Etsu Chemical Co., Ltd.); trade names "TSE3402", "TSE3453", "TSE3455T" Commercial products such as "TSE3457" and "TSE3466" (above, Momentive Performance Materials).

The polyfluorene-oxygen composition of the present invention can be prepared by, for example, mixing the solvent for dissolving polyfluorene oxide and the above polyfluorene oxide at room temperature (15 to 30 ° C) for about 0.5 to 1 hour.

The content of the polyfluorene oxide in the polyfluorene oxide composition of the present invention can be appropriately adjusted as needed, for example, in the case of using a linear or cyclic organic polyoxane having a repeating unit represented by the above formula (1). In the case of the polyoxymethane, the amount of the solvent can be arbitrarily selected in an amount of, for example, 42 parts by weight or more and less than 300 parts by weight, preferably 42 to 280 parts by weight, based on 100 parts by weight of the solvent for the polyoxymethylene dissolving.

The content of the solvent for dissolving polyoxymethylene in the polyfluorene oxide composition of the present invention is, for example, 90% by weight or less. The lower limit is, for example, 30% by weight, preferably 40% by weight, particularly preferably 50% by weight, and the upper limit is preferably 80% by weight, particularly preferably 70% by weight.

In the polyfluorene oxide composition of the present invention, the content of the solvent for dissolving polyoxane is such that a thick film of polyfluorene is formed, and a linear chain having a repeating unit represented by the above formula (1) is used. Or in the case of a cyclic organopolyoxyalkylene as a polyfluorene oxide, it is preferably 9 times by weight or less, more preferably 4 times by weight or less, and 2.3 times or less by weight with respect to the polyfluorene oxide. Very good. The lower limit is, for example, 0.4 times by weight, particularly preferably 0.6 times by weight, and most preferably 1 time by weight.

In the polyfluorene-oxygen composition of the present invention, in addition to the above-mentioned polyfluorene oxide and the above-mentioned solvent for dissolving polyfluorene oxide, other components (for example, hardener) contained in general polyfluorene oxide may be appropriately blended as needed. ,hardening Catalyst, retarder, antioxidant, plasticizer, etc.).

The polyxanthene composition of the present invention has low viscosity and excellent workability, and the viscosity at 25 ° C is, for example, about 1 to 400 cP. Further, the viscosity of the polyoxymethylene composition can be measured, for example, using an E-type viscometer (rotator: 1° 34' × R24, number of revolutions: 10 rpm, measurement temperature: 25 ° C).

The polyfluorene oxide composition of the present invention can be suitably used as a material for forming a sealing material, a solid crystal material, a barrier material, an optical waveguide, and a lens used in the manufacture of an LED device, and a PCB (Printed Circuit Board) used in the manufacture of a printed circuit board. Use of packaging materials, potting materials, coating materials, heat sinks used in electronic control units of automobiles, etc.

[Examples]

Hereinafter, the present invention will be more specifically described by the examples, but the present invention is not limited by the examples.

Example 1

a vinyl-containing polydimethyl siloxane containing a platinum catalyst and a retarder (trade name "KE-106", manufactured by Shin-Etsu Chemical Co., Ltd., viscosity at 25 ° C: 3790 cP) and as a polyoxygen The solvent for dissolving, dipropylene glycol methyl n-butyl ether (manufactured by DAICEL Co., Ltd.), was mixed, and stirred at 20 ° C for about 1 hour to prepare a polyfluorene composition having a polyoxynium concentration of 70% by weight. Viscosity at ° C: 353 cP), and 75% by weight of a polyoxyl composition.

In the obtained polyfluorene-oxygen composition, the presence or absence of the insoluble matter of polyoxymethylene was visually confirmed, and the solubility of the polyfluorene-solubilizing solvent was evaluated according to the following criteria.

<Evaluation criteria for solubility>

In case of insoluble matter not confirmed: ○ (dissolved)

Confirmation of insoluble matter: × (insoluble)

Example 2, Comparative Example 1~2

The polyfluorene-oxygen composition was prepared in the same manner as in the above except that the solvent for dissolving the polyoxane shown in Table 1 was used instead of the dipropylene glycol methyl n-butyl ether, and the polymerization of the solvent for dissolving polyoxymethane was evaluated. Oxygen solubility.

In addition, as a solvent for dissolving polyoxane, cyclohexyl methyl ether (manufactured by Wako Pure Chemical Industries, Ltd.), toluene (manufactured by Wako Pure Chemical Industries, Ltd.), and xylene (Wako Pure Chemical Industries, Ltd.) are used. system).

For the above Table 1, the solvent of the present invention has excellent polyoxyl solubility in the same grade as toluene and xylene previously used at room temperature.

Moreover, the solvent in this case is different from toluene and xylene, and is not a target of SVHC, and has excellent safety.

Therefore, the solvent of the present invention can be suitably used as a solvent for dissolving polyoxyl oxide used in the production of an optical device and an electronic device.

[Industrial availability]

The solvent for dissolving polyfluorene oxygen of the present invention is a non-SVHC-defined object, and has excellent safety, and can be dissolved at a high concentration even at room temperature. Polyoxyl. Further, it is possible to form a polyfluorene oxide composition having a low viscosity and excellent workability and capable of forming a thick film of a polyfluorene oxide member. Therefore, the polyfluorene oxide composition obtained by dissolving polyfluorene oxygen by the solvent for dissolving polyfluorene oxygen of the present invention can be suitably used as, for example, a sealing material, a solid crystal material, a barrier material, and an optical waveguide used in the manufacture of an LED device. And the material for forming the lens; the packaging material, the potting material, the coating material used in the manufacture of the PCB, the heat dissipation material used on the electronic control unit of the automobile, and the like.

Claims (6)

A solvent for dissolving polyoxane, which comprises one or more solvents (A), CH ₃ -OR ¹ represented by the following formula (a-1) or the following formula (a-2) ( A-1) CH ₃ -C(=O)OR ² (a-2) wherein R ¹ and R ² are the same or different, and represent an alkyl group or a cycloalkyl group having 3 to 11 carbon atoms which may have an ether bond. . The solvent for dissolving polyoxyl of claim 1, wherein the solvent (A) is ethylene glycol dimethyl ether, diethylene glycol methyl butyl ether, propylene glycol methyl n-propyl ether, propylene glycol methyl n-butyl Ethyl ether, propylene glycol methyl isoamyl ether, dipropylene glycol dimethyl ether, dipropylene glycol methyl n-propyl ether, dipropylene glycol methyl n-butyl ether, dipropylene glycol methyl isoamyl ether, dipropylene glycol methyl ring At least one solvent selected from the group consisting of amyl ether, cyclopentyl methyl ether, cyclohexyl methyl ether, and cyclohexanol acetate. The solvent for dissolving polyoxyl of claim 1, wherein the solvent (A) is dipropylene glycol methyl n-butyl ether and/or cyclohexyl methyl ether. A polyxanthene composition containing the solvent for dissolving polyfluorene oxygen and the polyoxyxylene according to any one of claims 1 to 3. The polyoxo-oxygen composition of claim 4, wherein the polyfluorene oxide is a linear or cyclic organopolyoxane having a repeating unit represented by the following formula (1), The polyoxymethylene composition of claim 4, wherein the polyoxymethylene is a linear or cyclic vinyl-containing polydimethyloxane.