WO2021028991A1 - 樹脂組成物、蓄熱材、及び物品 - Google Patents
樹脂組成物、蓄熱材、及び物品 Download PDFInfo
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- WO2021028991A1 WO2021028991A1 PCT/JP2019/031733 JP2019031733W WO2021028991A1 WO 2021028991 A1 WO2021028991 A1 WO 2021028991A1 JP 2019031733 W JP2019031733 W JP 2019031733W WO 2021028991 A1 WO2021028991 A1 WO 2021028991A1
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- Prior art keywords
- heat storage
- group
- resin composition
- mass
- monomer
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- 238000005338 heat storage Methods 0.000 title claims description 202
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- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 52
- 229910010272 inorganic material Inorganic materials 0.000 claims abstract description 31
- 239000011147 inorganic material Substances 0.000 claims abstract description 30
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 15
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims abstract description 13
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- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 10
- 125000003700 epoxy group Chemical group 0.000 claims description 9
- 125000003277 amino group Chemical group 0.000 claims description 8
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- YCOZIPAWZNQLMR-UHFFFAOYSA-N heptane - octane Natural products CCCCCCCCCCCCCCC YCOZIPAWZNQLMR-UHFFFAOYSA-N 0.000 description 3
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 3
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- FOSPKRPCLFRZTR-UHFFFAOYSA-N zinc;dinitrate;hydrate Chemical compound O.[Zn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O FOSPKRPCLFRZTR-UHFFFAOYSA-N 0.000 description 1
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Images
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/06—Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice versa
- C09K5/063—Materials absorbing or liberating heat during crystallisation; Heat storage materials
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/26—Esters containing oxygen in addition to the carboxy oxygen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/26—Esters containing oxygen in addition to the carboxy oxygen
- C08F220/28—Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety
- C08F220/285—Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety and containing a polyether chain in the alcohol moiety
- C08F220/288—Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety and containing a polyether chain in the alcohol moiety and containing polypropylene-co-ethylene oxide in the alcohol moiety
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
- C08F290/06—Polymers provided for in subclass C08G
- C08F290/062—Polyethers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/10—Encapsulated ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur, or oxygen atoms in addition to the carboxy oxygen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L55/00—Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L23/00 - C08L53/00
- C08L55/005—Homopolymers or copolymers obtained by polymerisation of macromolecular compounds terminated by a carbon-to-carbon double bond
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/06—Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice versa
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2800/00—Copolymer characterised by the proportions of the comonomers expressed
- C08F2800/20—Copolymer characterised by the proportions of the comonomers expressed as weight or mass percentages
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Definitions
- the present invention relates to a resin composition, a heat storage material, and an article.
- the heat storage material is a material that can take out the stored energy as heat as needed.
- This heat storage material is used in applications such as air conditioning equipment, floor heating equipment, refrigerators, electronic parts such as IC chips, automobile interior / exterior materials, automobile parts such as canisters, and heat insulating containers.
- paraffin is used as a latent heat storage substance having a phase change temperature higher than 0 ° C. and 100 ° C. or lower.
- paraffin becomes liquid when it undergoes a phase change due to heating, and there is a risk of ignition and ignition. Therefore, in order to use paraffin as a heat storage material, paraffin is stored in a closed container such as a bag. It is necessary to prevent the leakage of paraffin wax, which limits the fields of application.
- Patent Document 1 discloses a method using a gelling agent.
- the gel produced by this method can maintain a gel-like molded product even after the phase change of paraffin.
- liquid leakage, volatilization of the heat storage material, etc. may occur when the heat storage material is used.
- Patent Document 2 discloses a method using a hydrogenated conjugated diene copolymer.
- the shape can be maintained near the melting or solidification temperature of the hydrocarbon compound, but when the temperature becomes higher, phase separation occurs due to the low compatibility, and the hydrocarbon compound leaks.
- An object of the present invention is to provide a resin composition suitably used for forming a heat storage material in one aspect.
- One aspect of the present invention is a resin composition containing an acrylic resin obtained by polymerizing a monomer component containing a monomer (monomer A) represented by the following formula (1) and a heat storage inorganic material.
- R 1 represents a hydrogen atom or a methyl group
- R 2 represents a monovalent group having a polyoxyalkylene chain.
- Another aspect of the present invention is a resin composition containing an acrylic resin containing a structural unit (structural unit A) represented by the following formula (2) and a heat storage inorganic material.
- R 3 represents a hydrogen atom or a methyl group
- R 4 represents a monovalent group having a polyoxyalkylene chain.
- these resin compositions contain a heat storage inorganic material, they are superior to, for example, a resin composition containing only a heat storage organic material due to the large amount of heat storage of the heat storage inorganic material. It is easy to form a heat storage material with heat storage properties.
- these resin compositions contain not only a heat storage inorganic material but also a predetermined acrylic resin having excellent heat storage properties (an acrylic resin having a specific structural unit having a polyoxyalkylene chain). Therefore, the heat storage inorganic material can be retained by the acrylic resin while suppressing the decrease in the heat storage amount of the entire resin composition (heat storage material). Therefore, for example, in the formed heat storage material, both heat storage property and flexibility can be achieved. Further, since the acrylic resin can be cured as needed, it is possible to suppress liquid leakage and volatilization of the components constituting the heat storage material.
- the monomer component can be copolymerized with the monomer A and may further contain a monomer B having a reactive group.
- the acrylic resin may further contain a structural unit B having a reactive group in addition to the structural unit A.
- the reactive group may be at least one group selected from the group consisting of a carboxyl group, a hydroxyl group, an isocyanate group, an amino group and an epoxy group.
- the resin composition may further contain a curing agent capable of reacting with a reactive group.
- the curing agent may be at least one curing agent selected from the group consisting of an isocyanate-based curing agent, a phenol-based curing agent, an amine-based curing agent, an imidazole-based curing agent, and an acid anhydride-based curing agent.
- the heat storage inorganic material may contain vanadium dioxide.
- the resin composition may further contain capsules containing a heat storage organic material.
- the content of the heat storage inorganic material may be 50% by mass or more based on the total amount of the resin composition.
- the resin composition may be used for forming a heat storage material.
- Another aspect of the present invention is a heat storage material containing a cured product of the above resin composition.
- Another aspect of the present invention is an article comprising a heat source and a cured product of the resin composition provided so as to be in thermal contact with the heat source.
- FIG. 5 is a schematic cross-sectional view showing another embodiment of the article. It is a schematic cross-sectional view which shows the other embodiment of the manufacturing method of an article.
- (meth) acrylate means “acrylate” and its corresponding "methacrylate”
- (meth) acryloyl means “acryloyl” and its corresponding "methacryloyl”.
- the weight average molecular weight (Mw) and the number average molecular weight (Mn) in the present specification mean values determined by using gel permeation chromatography (GPC) under the following conditions and using polystyrene as a standard substance.
- good heat resistance means that the 1% weight loss temperature in the TG-DTA measurement is 200 ° C. or higher.
- the resin composition according to one embodiment contains an acrylic resin and a heat storage inorganic material.
- Acrylic resin is a polymer obtained by polymerizing a monomer component containing monomer A.
- Monomer A is represented by the following formula (1).
- R 1 represents a hydrogen atom or a methyl group
- R 2 represents a monovalent group having a polyoxyalkylene chain.
- Group having a polyoxyalkylene chain represented by R 2 may be a group represented by the following formula (3).
- Ra represents a hydrogen atom or an alkyl group having 1 to 18 carbon atoms
- R b represents an alkylene group
- n represents an integer of 2 or more
- * represents a bond.
- the alkyl group represented by Ra may be linear or branched.
- the number of carbon atoms of the alkyl group represented by Ra is preferably 1 to 15, more preferably 1 to 10, and even more preferably 1 to 5.
- Ra is particularly preferably a hydrogen atom or a methyl group.
- the alkylene group represented by R b may be linear or branched.
- R b may be, for example, an alkylene group having 2 to 4 carbon atoms.
- a plurality of R bs present in the polyoxyalkylene chain may be the same as each other or may be different from each other.
- the polyoxyalkylene chain preferably has one or more selected from the group consisting of an oxyethylene group, an oxypropylene group and an oxybutylene group, and more preferably from an oxyethylene group and an oxypropylene group. It has one or two kinds selected from the above group, and more preferably has only an oxyethylene group.
- n may be appropriately selected according to the melting point of the target heat storage material, and may be, for example, an integer of 2 or more, 4 or more, 6 or more, or 8 or more, 230 or less, 220 or less, 210 or less, Alternatively, it may be an integer of 200 or less.
- the monomer A may be a (meth) acrylate having a monovalent group having a polyoxyalkylene chain represented by the formula (3) at the end of the ester group.
- monomer A examples include polyethylene glycol (meth) acrylate, methoxypolyethylene glycol (meth) acrylate, polypropylene glycol (meth) acrylate, methoxypolypropylene glycol (meth) acrylate, polybutylene glycol (meth) acrylate, and methoxypolybutylene glycol (meth).
- n in the formula (3) may be, for example, an integer of 2 to 90.
- the monomer A represented by the formula (1) a commercially available product can be used.
- Commercial products used as monomer A are PP-500, PP-800, PP-1000, AP-400, AP-550, AP-800, 700PEP-350B, 10PEP-550B, 55PET- manufactured by Nichiyu Co., Ltd.
- It may be 90G, M-130G, M-230G, ester RS-30 manufactured by Sanyo Kasei Kogyo Co., Ltd., Bismer MPE400A, Bismer MPE550A manufactured by Osaka Organic Chemical Industry Co., Ltd., or the like.
- the content of the monomer A may be 20 parts by mass or more, 25 parts by mass or more, or 30 parts by mass or more with respect to 100 parts by mass of the monomer component, and a more excellent heat storage amount can be obtained when the heat storage material is formed. From this point of view, it is preferably 60 parts by mass or more, more preferably 80 parts by mass or more, further preferably 85 parts by mass or more, particularly preferably 90 parts by mass or more, and for example, 98 parts by mass or less.
- the monomer component may further contain a monomer B (reactive monomer) that is copolymerizable with the monomer A and has a reactive group.
- Monomer B contains a group having an ethylenically unsaturated bond (ethylenically unsaturated group) so that it can be copolymerized with monomer A. Examples of the ethylenically unsaturated group include a (meth) acryloyl group, a vinyl group, and an allyl group.
- the monomer B is preferably a monomer having a reactive group and a (meth) acryloyl group (a (meth) acrylic monomer having a reactive group).
- Monomer B may be used alone or in combination of two or more.
- the reactive group in the monomer B may be, for example, a group capable of reacting with a curing agent described later, or a group capable of reacting with water (for example, moisture contained in air).
- the reactive group is, for example, at least one group selected from the group consisting of a carboxyl group, a hydroxyl group, an isocyanate group, an amino group and an epoxy group. That is, the monomer B is, for example, a carboxyl group-containing monomer, a hydroxyl group-containing monomer, an isocyanate group-containing monomer, an amino group-containing monomer, or an epoxy group-containing monomer.
- the reactive group may be at least one group selected from the group consisting of a hydroxyl group, an isocyanate group, an amino group and an epoxy group, and may be selected from the group consisting of a hydroxyl group, an isocyanate group and an epoxy group. It may be at least one group.
- carboxyl group-containing monomer examples include (meth) acrylic acid, carboxyethyl (meth) acrylate, carboxypentyl (meth) acrylate, itaconic acid, maleic acid, fumaric acid, crotonic acid, and isocrotonic acid.
- hydroxyl group-containing monomer examples include 2-hydroxyethyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6-hydroxyhexyl (meth) acrylate, and 8-hydroxyoctyl ( Hydroxyalkyl (meth) acrylates such as meta) acrylates, 10-hydroxydecyl (meth) acrylates, 12-hydroxylauryl (meth) acrylates; hydroxyalkylcycloalkanes such as (4-hydroxymethylcyclohexyl) methyl (meth) acrylates Examples include (meth) acrylate.
- the hydroxyl group-containing monomer may be hydroxyethyl (meth) acrylamide, allyl alcohol, 2-hydroxyethyl vinyl ether, 4-hydroxybutyl vinyl ether, diethylene glycol monovinyl ether and the like.
- Examples of the isocyanate group-containing monomer include 2-methacryloyloxyethyl isocyanate and 2-acryloyloxyethyl isocyanate.
- the isocyanate group in the isocyanate group-containing monomer may be blocked (protected) by a blocking agent (protecting group) that can be desorbed by heat. That is, the isocyanate group-containing monomer may be a monomer having a blocked isocyanate group represented by the following formula (4).
- B represents a protecting group and * represents a bond.
- the protecting group in the blocked isocyanate group may be a protecting group that can be desorbed (deprotected) by heating (for example, heating at 80 to 160 ° C.).
- a substitution reaction between the blocking agent (protecting group) and the curing agent described later can occur under deprotection conditions (for example, heating conditions of 80 to 160 ° C.).
- an isocyanate group is generated by deprotection, and the isocyanate group can react with a curing agent described later.
- Examples of the blocking agent in the blocked isocyanate group include oxime compounds such as formaldehyde, acetoaldoxime, acetooxime, methylethylketooxime and cyclohexanone oxime; pyrazole compounds such as pyrazole, 3-methylpyrazole and 3,5-dimethylpyrazole; ⁇ - Lactam compounds such as caprolactam, ⁇ -valerolactam, ⁇ -butyrolactam and ⁇ -propiolactam; mercaptan compounds such as thiophenol, methylthiophenol and ethylthiophenol; acid amide compounds such as acetate and benzamide; imide succinate and malein Examples thereof include imide compounds such as acid imide.
- oxime compounds such as formaldehyde, acetoaldoxime, acetooxime, methylethylketooxime and cyclohexanone oxime
- pyrazole compounds such as pyrazole, 3-methyl
- Examples of the monomer having a blocked isocyanate group include 2-[(3,5-dimethylpyrazolyl) carbonylamino] ethyl methacrylate and 2- (0- [1'-methylpropylideneamino] carboxyamino) methacrylate.
- amino group-containing monomer examples include N, N-dimethylaminoethyl (meth) acrylate, N, N-diethylaminoethyl (meth) acrylate, N, N-dimethylaminopropyl (meth) acrylate, and N, N-diethylamino.
- Propyl (meth) acrylate can be mentioned.
- Examples of the epoxy group-containing monomer include glycidyl (meth) acrylate, glycidyl ⁇ -ethyl (meth) acrylate, glycidyl ⁇ -n-propyl (meth) acrylate, and glycidyl ⁇ -n-butyl (meth) acrylate.
- the content of the monomer B may be 2 parts by mass or more, 3 parts by mass or more, or 5 parts by mass or more, and 25 parts by mass with respect to 100 parts by mass of the monomer component, from the viewpoint of further excellent heat storage amount of the heat storage material. It may be less than or equal to, preferably 20 parts by mass or less, more preferably 15 parts by mass or less, still more preferably 13 parts by mass or less, and particularly preferably 10 parts by mass or less.
- the monomer component may further contain other monomers in addition to the monomer A and the monomer B, if necessary.
- the other monomer is a monomer copolymerizable with the monomer A and the monomer B (however, a monomer other than the monomer A and the monomer B).
- the other monomer contains, for example, a group having an ethylenically unsaturated bond (ethylene unsaturated group) so that it can be copolymerized with the monomer A and the monomer B.
- the ethylenically unsaturated group may be, for example, a (meth) acryloyl group, a vinyl group, an allyl group or the like, and is preferably a (meth) acryloyl group.
- the other monomer may contain one ethylenically unsaturated group and may contain two or more ethylenically unsaturated groups.
- crosslinks derived from the other monomer can be formed in the obtained acrylic resin.
- monomers containing one ethylenically unsaturated group include, for example, an alkyl (meth) acrylate having a linear or branched alkyl group having 1 to 30 carbon atoms at the end of the ester group, and a cyclic hydrocarbon group. It may be at least one monomer (monomer C) selected from the group consisting of cycloalkyl (meth) acrylates having a terminal of an ester group.
- Alkyl (meth) acrylates having a linear or branched alkyl group having 1 to 30 carbon atoms at the end of the ester group include, for example, dodecyl (meth) acrylate (lauryl (meth) acrylate), tetradecyl (meth) acrylate, and the like.
- Alkyl (meth) acrylates having a linear or branched alkyl group having 1 to 30 carbon atoms at the end of the ester group are methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, and butyl (meth).
- An alkyl (meth) acrylate having an alkyl group having less than 12 carbon atoms (1 to 11 carbon atoms) at the end of the ester group, such as acrylate, may be used.
- the cycloalkyl (meth) acrylate having a cyclic hydrocarbon group at the end of the ester group may be isobornyl (meth) acrylate, dicyclopentanyl (meth) acrylate or the like.
- the other monomer containing two ethylenically unsaturated groups may be, for example, a monomer represented by the following formula (5) (monomer D).
- R 11 and R 12 each independently represent a hydrogen atom or a methyl group
- R 13 represents a divalent group having a polyoxyalkylene chain.
- R 11 and R 12 may be a hydrogen atom and the other may be a methyl group, and in another embodiment, both R 11 and R 12 may be hydrogen atoms. In another embodiment, both R 11 and R 12 may be methyl groups.
- the polyoxyalkylene chain is represented by, for example, the following formula (6).
- R 14 represents an alkylene group
- m represents an integer of 2 or more
- * represents a bond.
- the alkylene group represented by R 14 may be linear or branched.
- R 14 may be, for example, an alkylene group having 2 to 4 carbon atoms.
- a plurality of R 14s present in the polyoxyalkylene chain may be the same as each other or may be different from each other.
- a plurality of R 14s present in the polyoxyalkylene chain are one or more selected from the group consisting of an ethylene group, a propylene group and a butylene group, and more preferably selected from the group consisting of an ethylene group and a propylene group. It is one or two kinds, more preferably all ethylene groups.
- M may be, for example, an integer of 10 or more or 20 or more, and may be an integer of 300 or less, 250 or less, or 200 or less.
- R 13 may be a divalent group having other organic groups in addition to the polyoxyalkylene chain.
- Other organic groups may be polyoxyalkylene chain non-chain groups, for example, methylene chain (-CH 2 - chain to the structural units), containing polyester chain (-COO- into the structural unit Chain), polyurethane chain (chain containing —OCON— in the structural unit) and the like.
- the monomer D is preferably a monomer represented by the following formula (7).
- R 11 and R 12 have the same meanings respectively as R 11 and R 12 in Formula (5)
- R 14 and m are respectively the same as R 14 and m in the formula (6).
- Acrylic resin is obtained by polymerizing a monomer component containing monomer A and other monomers used as needed.
- the polymerization method can be appropriately selected from known polymerization methods such as various radical polymerization methods, and may be, for example, a suspension polymerization method, a solution polymerization method, a massive polymerization method or the like.
- the suspension polymerization method when the weight average molecular weight of the acrylic resin is increased (for example, 200,000 or more), the suspension polymerization method is preferably used, and when the weight average molecular weight of the acrylic resin is decreased (for example, 150,000 or less).
- a solution polymerization method is preferably used.
- a monomer component as a raw material, a polymerization initiator, a chain transfer agent added as necessary, water and a suspension agent are mixed to prepare a dispersion.
- the suspending agent examples include water-soluble polymers such as polyvinyl alcohol, methyl cellulose and polyacrylamide, and poorly soluble inorganic substances such as calcium phosphate and magnesium pyrophosphate.
- a water-soluble polymer such as polyvinyl alcohol is preferably used.
- the amount of the suspending agent to be blended is preferably 0.005 to 1 part by mass, more preferably 0.007 to 0.08 part by mass, still more preferably 0, based on 100 parts by mass of the total amount of the monomer components as raw materials. It is 01 to 0.07 parts by mass.
- a molecular weight modifier such as a mercaptan compound, thioglycol, carbon tetrachloride, or ⁇ -methylstyrene dimer may be further added, if necessary.
- the polymerization temperature is preferably 0 to 200 ° C., more preferably 20 to 150 ° C., and even more preferably 40 to 120 ° C.
- the solvent used is, for example, an aromatic solvent such as toluene or xylene, a ketone solvent such as methyl ethyl ketone or methyl isobutyl ketone, an ester solvent such as ethyl acetate or butyl acetate, or carbon tetrachloride.
- examples thereof include chlorine-based solvents such as 2-propanol and alcohol-based solvents such as 2-butanol.
- the solid content concentration in the solution at the start of solution polymerization is preferably 40 to 70% by mass, more preferably 50 to 60% by mass, 20 to 70% by mass, 25 to 20 to 70% by mass, from the viewpoint of the polymerizable property of the obtained acrylic resin. It may be 65% by mass, or 40 to 60% by mass.
- the polymerization temperature is preferably 0 to 200 ° C., more preferably 40 to 120 ° C., and may be 70 to 90 ° C.
- a polymerization initiator may be used.
- the polymerization initiator may be, for example, a radical polymerization initiator.
- examples of the radical polymerization initiator include benzoyl peroxide, lauroyl peroxide, di-t-butylperoxyhexahydroterephthalate, t-butylperoxy-2-ethylhexanoate, and 1,1-t-butylperoxy.
- -Organic peroxides such as 3,3,5-trimethylcyclohexane and t-butylperoxyisopropylcarbonate, azobisisobutyronitrile, azobis-4-methoxy-2,4-dimethylvaleronitrile, azobiscyclohexanone-1- Examples thereof include azo compounds such as carbonitrile and azodibenzoyl.
- the amount of the polymerization initiator is preferably 0.01 part by mass or more, more preferably 0.05 part by mass or more, still more preferably 0.05 part by mass or more, based on 100 parts by mass of the total amount of the monomer components. It is 0.1 part by mass or more.
- the total amount of the monomer components of the polymerization initiator is 100, from the viewpoint that the molecular weight of the acrylic resin is in a suitable range, decomposition products are suppressed, and suitable adhesive strength can be obtained when used as a heat storage material. It is preferably 10 parts by mass or less, more preferably 5 parts by mass or less, and further preferably 3 parts by mass or less with respect to parts by mass.
- the acrylic resin obtained as described above has a structural unit derived from monomer A. That is, the resin composition according to one embodiment contains an acrylic resin containing a structural unit A (a structural unit derived from the monomer A).
- the structural unit A is represented by the following formula (2).
- R 3 represents a hydrogen atom or a methyl group
- R 4 represents a monovalent group having a polyoxyalkylene chain.
- the monovalent group having a polyoxyalkylene chain represented by R 4 may be the same group as the monovalent group having a polyoxyalkylene chain represented by R 2 described above.
- the content of the structural unit A may be 20 parts by mass or more, 25 parts by mass or more, or 30 parts by mass or more with respect to 100 parts by mass of all the structural units constituting the acrylic resin, and is further added to the heat storage amount of the heat storage material. From an excellent viewpoint, it is preferably 60 parts by mass or more, more preferably 80 parts by mass or more, further preferably 85 parts by mass or more, particularly preferably 90 parts by mass or more, and may be, for example, 98 parts by mass or less.
- the acrylic resin may further contain a structural unit B having a reactive group (a structural unit derived from the monomer B) in addition to the structural unit A.
- the reactive group may be, for example, a group capable of reacting with a curing agent described later, or a group capable of reacting with water (for example, moisture contained in air).
- the reactive group is, for example, at least one group selected from the group consisting of a carboxyl group, a hydroxyl group, an isocyanate group, an amino group and an epoxy group.
- the structural unit B is, for example, a structural unit derived from the above-mentioned carboxyl group-containing monomer, hydroxyl group-containing monomer, isocyanate group-containing monomer, amino group-containing monomer, or epoxy group-containing monomer.
- the acrylic resin may further contain one or more of these structural units B.
- the structural unit B is preferably a structural unit represented by the following formula (8).
- R 5 represents a hydrogen atom or a methyl group
- R 6 represents a monovalent organic group having a hydrogen atom or a reactive group.
- R 6 is a hydrogen atom
- the —COOH group containing R 6 functions as a reactive group.
- the reactive group in the organic group represented by R 6 may be the same as the reactive group in the monomer B described above.
- the content of the structural unit B is 2 parts by mass or more and 3 parts by mass or more with respect to 100 parts by mass of all the structural units constituting the acrylic resin from the viewpoint that a more excellent heat storage amount can be obtained when the heat storage material is formed. , Or 5 parts by mass or more, 25 parts by mass or less, preferably 20 parts by mass or less, more preferably 15 parts by mass or less, still more preferably 13 parts by mass or less, and particularly preferably 10 parts by mass or less. Is.
- the acrylic resin may further contain other structural units, if necessary, in addition to the structural unit A and the structural unit B.
- the other structural unit may be a structural unit derived from the other monomer (monomer C, monomer D, etc.) described above.
- the acrylic resin may be any of a random copolymer, a block copolymer, and a graft copolymer.
- the weight average molecular weight of the acrylic resin is preferably 150,000 or more, more preferably 200,000 or more or 250,000 or more, still more preferably 300,000 or more, from the viewpoint of excellent strength of the heat storage material.
- the weight average molecular weight of the acrylic resin is preferably 20000 or less, more preferably 1500,000 or less, still more preferably 1,000,000 or less, from the viewpoint of ease of handling of the resin composition.
- the weight average molecular weight of the acrylic resin is preferably 100,000 or less, more preferably 70,000 or less, still more preferably 40,000 or less, from the viewpoint of reducing the viscosity of the resin composition.
- the weight average molecular weight of the acrylic resin may be, for example, 5000 or more.
- the content of the acrylic resin may be 5% by mass or more, 10% by mass or more, or 20% by mass or more, and is 50% by mass or less, 40% by mass or less, or 30% by mass or less based on the total amount of the resin composition. It may be there.
- the resin composition further contains a heat storage inorganic material from the viewpoint of further increasing the amount of heat storage.
- the heat storage inorganic material is a material composed of an inorganic compound having a heat storage property.
- the heat storage inorganic material may be, for example, an inorganic material having heat storage property associated with a solid-liquid phase transition, a solid-solid phase transition, or an electronic phase transition.
- Examples of the inorganic material having heat storage property associated with the electronic phase transition include VO 2 , LiMn 2 O 4 , LiVS 2 , LiVO 2 , NaNiO 2 , XBaFe 2 O 5 , and XBaCo 2 O 5.5 (X is Y). , Sm, Pr, Eu, Gd, Dy, Ho, Tb and other rare earth elements).
- Examples of the inorganic material having heat storage property associated with the solid phase transition include a material that undergoes martensitic transformation (shape memory alloy such as NiTi, CuZnAl, and CuAlNi) and a thermochromic material (N, N-diethylethylenediamine copper complex, etc.). , Soft viscous crystals (trimethylolethane, pentaerythritol, neopentyl glycol, etc.), magnetic phase transition materials (Mn-Zn ferrite, NiFe alloy, etc.), and normal dielectric-ferroelectric transition materials (BaTIO 3, etc.) Be done.
- shape memory alloy such as NiTi, CuZnAl, and CuAlNi
- thermochromic material N, N-diethylethylenediamine copper complex, etc.
- Soft viscous crystals trimethylolethane, pentaerythritol, neopentyl glycol, etc.
- Examples of the inorganic material having heat storage property associated with the solid-liquid phase transition include calcium chloride hydrate, sodium acetate hydrate, potassium acetate hydrate, sodium hydroxide hydrate, potassium hydroxide hydrate, and water.
- the heat storage inorganic material is preferably an inorganic material having a heat storage property associated with an electron phase transition, and more preferably VO 2 (vanadium dioxide).
- a part or all of the heat storage inorganic material may be contained in the resin composition in the form of capsules enclosed in an outer shell (shell).
- the material for forming the outer shell (shell) may be the same as the material for forming the outer shell (shell) in the heat storage capsule described later.
- the content of the heat storage inorganic material is preferably 50% by mass or more, more preferably 60% by mass or more, still more preferably 70, based on the total amount of the resin composition, from the viewpoint of further improving the heat storage amount of the heat storage material to be formed. It may be mass% or more, particularly preferably 80% by mass or more, and may be, for example, 95% by mass or less.
- the resin composition may further contain a heat storage organic material from the viewpoint of further enhancing the heat storage effect.
- the heat storage organic material may be any organic material capable of storing heat, and may be, for example, a component having heat storage property associated with a phase transition (however, the acrylic resin described above is excluded).
- As the heat storage organic material a material having a phase transition temperature suitable for the target temperature is appropriately selected according to the purpose of use.
- the heat storage organic material has a solid-liquid phase transition point (melting point) at, for example, ⁇ 30 to 120 ° C. from the viewpoint of obtaining a heat storage effect in a practical range.
- the heat-storing organic material may be, for example, a saturated hydrocarbon compound (paraffin-based hydrocarbon compound), natural wax, petroleum wax, polyalkylene glycol, sugar alcohol, or the like.
- the heat storage organic material is preferably a saturated hydrocarbon compound (paraffin-based hydrocarbon compound) from the viewpoint of being inexpensive, having low toxicity, and easily selecting a material having a desired phase transition temperature.
- saturated hydrocarbon compound examples include n-decane (C10 (carbon number, same below), ⁇ 29 ° C. (transition point (melting point), same below)), n-undecane (C11, -25 ° C), n-dodecane (C12, -9 ° C), n-tridecane (C13, -5 ° C), n-tetradecane (C14, 6 ° C), n-pentadecane (C15, 9 ° C), n-hexadecane (C16, 18 ° C) ), N-Heptacosane (C17, 21 ° C), n-octadecane (C18, 28 ° C), n-nanodecane (C19, 32 ° C), n-eicosane (C20, 37 ° C), n-henicosan (C21, 41 ° C).
- C10 carbon number, same below
- N-Docosane C22, 46 ° C
- n-Tricosane C23, 47 ° C
- n-Tetracontane C24, 50 ° C
- n-Pentacosane C25, 54 ° C
- n-Hexacosane C26, 56 ° C
- N-Heptacosane C27, 60 ° C
- n-octacosane C28, 65 ° C
- n-Nonacosane C29, 66 ° C
- n-triacontane C30, 67 ° C
- n-tetracontane C40, 81 ° C.
- n-pentacontane C50, 91 ° C.
- n-hexacontane C60, 98 ° C.
- n-hexane C100, 115 ° C.
- the saturated hydrocarbon compound may be a linear saturated hydrocarbon compound such as these, or may be a branched saturated hydrocarbon compound having the same carbon number as these linear saturated hydrocarbon compounds. Good.
- the saturated hydrocarbon compound may be one or more of these.
- the polyalkylene glycol may be, for example, polyethylene glycol, polypropylene glycol, polybutylene glycol, etc., and is preferably polyethylene glycol.
- the weight average molecular weight (Mw) of the polyalkylene glycol may be 800 or more, 900 or more, or 1000 or more, and may be 2000 or less, 1900 or less, or 1800 or less.
- the content of the heat storage organic material may be 1% by mass or more, 2% by mass or more, or 3% by mass or more, based on the total amount of the resin composition, and is 20% by mass or less, 10% by mass or less, or 5% by mass. It may be:
- the heat storage capsule has a heat storage organic material and an outer shell (shell) containing the heat storage organic material.
- the heat storage organic material may be contained in the resin composition in a state of being encapsulated. That is, in one embodiment, the resin composition may further contain a capsule containing a heat storage organic material (hereinafter, also referred to as “heat storage capsule”). In another embodiment, the heat storage organic material may be included in the resin composition in a state not contained in the capsule.
- the heat storage capsule has a heat storage organic material and an outer shell (shell) containing the heat storage organic material.
- the outer shell is preferably formed of a material having a heat resistant temperature sufficiently higher than the transition point (melting point) of the heat storage organic material.
- the material forming the outer shell has a heat resistant temperature of, for example, 30 ° C. or higher, preferably 50 ° C. or higher, with respect to the transition point (melting point) of the heat storage organic material.
- the heat-resistant temperature is defined as the temperature at which the weight loss of the capsule is measured by 1% when the weight loss of the capsule is measured using a differential thermogravimetric simultaneous measuring device (for example, TG-DTA6300 (manufactured by Hitachi High-Tech Science Co., Ltd.)). Will be done.
- the outer shell is preferably made of melamine resin, acrylic resin, urethane resin, silica or the like.
- microcapsules having an outer shell made of melamine resin include BA410xxP, 6C, BA410xxP, 18C, BA410xxP, 37C manufactured by Outlast Technology, and ThermoMemory FP-16 and FP-25 manufactured by Mitsubishi Paper Mills Limited. , FP-31, FP-39, Riken Resin PMCD-15SP, 25SP, 32SP, etc. manufactured by Miki Riken Kogyo Co., Ltd. are exemplified.
- microcapsules having an outer shell formed of an acrylic resin include Micronal DS5001X and 5040X manufactured by BASF.
- microcapsules having an outer shell formed of silica include Liken Resins LA-15, LA-25, and LA-32 manufactured by Miki Riken Kogyo Co., Ltd.
- the content of the heat storage organic material in the heat storage capsule is preferably 20% by mass or more, more preferably 60% by mass or more, based on the total amount of the heat storage capsule, from the viewpoint of further enhancing the heat storage effect. From the viewpoint of suppressing breakage of the capsule due to a change in the volume of the material, it is preferably 80% by mass or less.
- the heat storage capsule may further contain graphite, metal powder, alcohol, etc. in the outer shell for the purpose of adjusting the thermal conductivity, specific gravity, etc. of the capsule.
- the particle size (average particle size) of the heat storage capsule is preferably 0.1 ⁇ m or more, more preferably 0.2 ⁇ m or more, still more preferably 0.5 ⁇ m or more, preferably 100 ⁇ m or less, and more preferably 50 ⁇ m or less. ..
- the particle size (average particle size) of the heat-storing capsule is measured using a laser diffraction type particle size distribution measuring device (for example, SALD-2300 (manufactured by Shimadzu Corporation)).
- the heat storage capacity of the heat storage capsule is preferably 150 J / g or more from the viewpoint of obtaining a heat storage material having a higher heat storage density.
- the heat storage capacity is measured by differential scanning calorimetry (DSC).
- the conventional known production methods such as the interfacial polymerization method, the in-situ polymerization method, the in-liquid curing coating method, and the coacervate method can be used depending on the heat storage organic material, the outer shell material, and the like. You can choose the appropriate method.
- the content of the heat storage capsule may be 1% by mass or more, 3% by mass or more, or 5% by mass or more, based on the total amount of the resin composition, and is 30% by mass or less, 20% by mass or less, or 10% by mass or less. It may be.
- the resin composition may further contain a curing agent from the viewpoint of suppressing liquid leakage and volatilization of the components constituting the heat storage material and improving heat resistance.
- the curing agent is a curing agent capable of reacting with the reactive group contained in the monomer B (structural unit B).
- the curing agent may be a thermosetting agent that reacts with the reactive group contained in the monomer B (structural unit B) by heat.
- the resin composition may be a resin composition that is cured by heating at preferably 105 ° C. or higher, more preferably 110 ° C. or higher, still more preferably 115 ° C. or higher, for example.
- the resin composition may be cured by heating at 200 ° C. or lower, 190 ° C. or lower, or 180 ° C. or lower.
- the heating time for heating the resin composition may be appropriately selected according to the composition of the resin composition so that the resin composition is suitably cured.
- curing agent examples include isocyanate-based curing agents, phenol-based curing agents, amine-based curing agents, imidazole-based curing agents, acid anhydride-based curing agents, and carboxylic acid-based curing agents. These curing agents may be used alone or in combination of two or more, depending on the type of the reactive group contained in the monomer B (structural unit B).
- isocyanate-based curing agent examples include tolylene diisocyanate (2,4- or 2,6-tolylene diisocyanate or a mixture thereof) (TDI), phenylenediocyanate (m- or p-phenylenediocyanate, or a mixture thereof).
- TDI tolylene diisocyanate (2,4- or 2,6-tolylene diisocyanate or a mixture thereof)
- phenylenediocyanate m- or p-phenylenediocyanate, or a mixture thereof.
- 4,4'-diphenyldiisocyanis 1,5-naphthalenediis diisocyanis (NDI), diphenylmethane diisocyanate (4,4'-, 2,4'-or 2,2'-diphenylmethane diisocyanate, or a mixture thereof) (MDI), 4 , 4'-toluidine diisocyanis (TODI), aromatic diisocyanates such as 4,4'-diphenyl ether diisocyanates, xylylene diisocyanates (1,3- or 1,4-xylylene diisocyanates, or mixtures thereof) (XDI), tetramethyl Examples thereof include xylylene diisocyanate (1,3- or 1,4-tetramethylxylylene diisocyanate, or a mixture thereof) (TMXDI), ⁇ , ⁇ '-diisocyanide-1,4-diethylbenzene and the like.
- NDI 1,5-naphthalened
- isocyanate-based curing agent examples include trimethylene diisocyanate, 1,2-propylene diisocyanate, butylene diisocyanate (tetramethylene diisocyanate, 1,2-butylene diisocyanate, 2,3-butylene diisocyanate, 1,3-butylene diisocyanate), 1,5.
- An aliphatic diisocyanate such as -pentamethylene diisocyanate (PDI), 1,6-hexamethylene diisocyanate (HDI), 2,4,4- or 2,2,4-trimethylhexamethylene diisocyanate, 2,6-diisocyanate methylcapate.
- phenolic curing agent examples include bisphenol A, bisphenol F, bisphenol S, 4,4'-biphenylphenol, tetramethylbisphenol A, dimethylbisphenol A, tetramethylbisphenol F, dimethylbisphenol F, tetramethylbisphenol S, and dimethyl.
- Bisphenol S tetramethyl-4,4'-biphenol, dimethyl-4,4'-biphenylphenol, 1- (4-hydroxyphenyl) -2- [4- (1,1-bis- (4-hydroxyphenyl)) Ethyl) phenyl] propane, 2,2'-methylene-bis (4-methyl-6-tert-butylphenol), 4,4'-butylidene-bis (3-methyl-6-tert-butylphenol), trishydroxyphenylmethane , Resolsinol, hydroquinone, pyrogallol, phenol compound having diisopropyridene skeleton; phenol compound having fluorene skeleton such as 1,1-di-4-hydroxyphenylfluorene; cresol compound; ethylphenol compound; butylphenol compound; octylphenol compound; bisphenol Novolac resin made from various phenols such as A, bisphenol F, bisphenol S, naphthol compound, xylylene
- amine-based curing agent examples include aromatics such as diaminodiphenylmethane, diaminodiphenylsulphon, diaminodiphenyl ether, p-phenylenediamine, m-phenylenediamine, o-phenylenediamine, 1,5-diaminonaphthalene, and m-xylylene diamine.
- Aliphatic amines such as amines, ethylenediamines, diethylenediamines, hexamethylenediamines, isophoronediamines, bis (4-amino-3-methyldicyclohexyl) methanes and polyetherdiamines; guanidines such as dicyandiamides and 1- (o-tolyl) biguanides. Examples include compounds.
- imidazole-based curing agent examples include 2-methylimidazole, 2-ethyl-4-methylimidazole, 2-phenylimidazole, 2-undecylimidazole, 2-heptadecylimidazole, 2-phenyl-4-methylimidazole, 1 -Benzyl-2-phenylimidazole, 1-benzyl-2-methylimidazole, 1-cyanoethyl-2-methylimidazole, 1-cyanoethyl-2-phenylimidazole, 1-cyanoethyl-2-undecylimidazole, 2,3-dihydro -1H-pyrrolo- [1,2-a] benzoimidazole, 2,4-diamino-6 (2'-methylimidazole (1')) ethyl-s-triazine, 2,4-diamino-6 (2'- Undecylimidazole (1')) ethyl-s-triazine
- Examples of the acid anhydride-based curing agent include phthalic anhydride, trimellitic anhydride, pyromellitic anhydride, benzophenone tetracarboxylic acid anhydride, ethylene glycol trimellitic anhydride, biphenyltetracarboxylic acid anhydride and the like.
- Hymic acid anhydride and the like alicyclic carboxylic acid anhydride.
- carboxylic acid-based curing agent examples include succinic acid, glutaric acid, adipic acid, sebacic acid, phthalic acid, isophthalic acid, and terephthalic acid.
- the content of the curing agent may be 0.01% by mass or more, 5% by mass or less, or 1% by mass or less based on the total amount of the resin composition.
- the resin composition may further contain a liquid medium.
- the liquid medium is not particularly limited as long as it is a solvent that dissolves each component or a dispersion medium that disperses each component, but may be, for example, a liquid medium composed of an organic compound.
- the liquid medium include ethyl lactate, propylene glycol monomethyl ether acetate, ethyl acetate, butyl acetate, ethoxyethyl propionate, 3-methylmethoxypropionate, N, N-dimethylformamide, methyl ethyl ketone, cyclopentanone and cyclohexanone. , Propylene glycol monomethyl ether, toluene, and xylene. These liquid media may be used alone or in combination of two or more.
- the content of the liquid medium may be 5% by mass or more or 10% by mass or more, and may be 80% by mass or less or 70% by mass or less based on the total amount of the resin composition.
- the resin composition preferably further contains a surface treatment agent from the viewpoint of improving the adhesiveness at the interface between the acrylic resin and the heat storage capsule.
- the surface treatment agent may be, for example, a coupling agent.
- the coupling agent examples include aminosilane-based coupling agents, epoxysilane-based coupling agents, phenylsilane-based coupling agents, alkylsilane-based coupling agents, alkenylsilane-based coupling agents, alkynylsilane-based coupling agents, and haloalkyl.
- Silane-based coupling agent siloxane-based coupling agent, hydrosilane-based coupling agent, silazane-based coupling agent, alkoxysilane-based coupling agent, chlorosilane-based coupling agent, (meth) acrylic silane-based coupling agent, isocyanuratesilane Examples thereof include a system coupling agent, a ureidosilane system coupling agent, a mercaptosilane system coupling agent, a sulfide silane system coupling agent, and an isocyanate silane system coupling agent.
- the coupling agent is preferably an aminosilane-based coupling agent from the viewpoint of reactivity with the resin.
- the content of the surface treatment agent may be 0.01% by mass or more, 0.02% by mass or more, or 0.05% by mass or more based on the total amount of the resin composition, and is 10% by mass or less and 5% by mass or less. , Or 2% by mass or less.
- the resin composition may further contain a curing accelerator from the viewpoint of accelerating the reaction between the reactive group and the curing agent that can be contained in the acrylic resin, or the reaction between the reactive group and water.
- a curing accelerator examples include a tertiary amine-based curing accelerator, a quaternary ammonium salt-based curing accelerator, an organophosphorus curing accelerator, and a tin catalyst. These curing accelerators may be used alone or in combination of two or more.
- the content of the curing accelerator may be 0.005% by mass or more, 0.01% by mass or more, or 0.02% by mass or more based on the total amount of the resin composition, and is 1% by mass or less and 0.5% by mass. % Or less, or 0.2% by mass or less.
- the resin composition may further contain an antioxidant from the viewpoint of improving the thermal reliability of the heat storage material to be formed.
- the antioxidant may be, for example, a phenol-based antioxidant, a benzophenone-based antioxidant, a benzoate-based antioxidant, a hindered amine-based antioxidant, a benzotriazole-based antioxidant, or the like.
- the content of the antioxidant may be 0.1% by mass or more, 0.5% by mass or more, 0.8% by mass or more, or 1% by mass or more based on the total amount of the resin composition, and is 10% by mass or less. 5, 5% by mass or less, or 3% by mass or less.
- the resin composition can further contain other additives, if necessary.
- Other additives include, for example, colorants, fillers, crystal nucleating agents, heat stabilizers, heat conductive materials, plasticizers, foaming agents, flame retardants, vibration damping agents, dehydrating agents, and flame retardant aids. ..
- Other additives may be used alone or in combination of two or more.
- the content (total content) of the other additives may be 0.1% by mass or more and 30% by mass or less based on the total amount of the resin composition.
- the resin composition may be in a solid state or a liquid state at 50 ° C., 80 ° C., or 90 ° C., and can be easily filled into a member having a complicated shape, and the applicable range of the heat storage material is wide. From the viewpoint of spreading, it is preferably in a liquid state at 50 ° C., 80 ° C. or 90 ° C.
- the viscosity of the resin composition at 80 ° C. is preferably 100 Pa ⁇ s or less, more preferably 50 Pa ⁇ s or less, still more preferably 40 Pa ⁇ s or less, and 20 Pa ⁇ s or less, from the viewpoint of excellent fluidity and handleability. Alternatively, it may be 10 Pa ⁇ s or less. From the same viewpoint, the resin composition has a viscosity of preferably 100 Pa ⁇ s or less, more preferably 50 Pa ⁇ s or less, still more preferably 40 Pa ⁇ s or less at the melting point of the acrylic resin + 20 ° C. ..
- the viscosity of the resin composition at 80 ° C. or the viscosity of the acrylic resin at the melting point + 20 ° C. may be, for example, 0.5 Pa ⁇ s or more.
- the viscosity of the resin composition means a value measured based on JIS Z8803, specifically, a value measured by an E-type viscometer (PE-80L manufactured by Toki Sangyo Co., Ltd.). To do.
- the calibration of the viscometer can be performed based on JIS Z 8809-JS14000.
- the melting point of the acrylic resin means a value measured by the method described in Examples.
- the resin composition described above is a curable composition that can be cured (for example, thermosetting).
- the resin composition is suitably used as a heat storage material by curing the resin composition (suitable as a composition for a heat storage material). That is, the heat storage material according to the embodiment contains the cured product of the resin composition described above.
- this heat storage material contains a heat storage inorganic material, it has excellent heat storage properties due to the large amount of heat storage of the heat storage inorganic material, as compared with, for example, a heat storage material containing only a heat storage organic material. Have.
- this heat storage material contains not only a heat storage inorganic material but also a predetermined acrylic resin having excellent heat storage properties (an acrylic resin having a specific structural unit having a polyoxyalkylene chain). Therefore, the heat storage inorganic material can be retained by the acrylic resin while suppressing the decrease in the heat storage amount of the entire heat storage material. Therefore, for example, in a heat storage material, both heat storage and flexibility can be achieved. Further, since the acrylic resin can be cured as needed, it is possible to suppress liquid leakage and volatilization of the components constituting the heat storage material.
- FIG. 1 is a schematic cross-sectional view showing an embodiment of a heat storage material.
- the heat storage material 1A according to the embodiment is a sheet-like (or film-like) heat storage material provided with the heat storage layer 2 which is a cured product of the resin composition described above.
- the heat storage material 1B has a heat storage layer 2 which is a cured product of the above-mentioned resin composition and an adhesive layer provided on one surface of the heat storage layer 2. It is a sheet-shaped (or film-shaped) heat storage material provided with 3. In this case, the heat storage material 1B can be more preferably adhered to the application target of the heat storage material 1B.
- the thickness of the heat storage layer 2 may be, for example, 0.01 mm or more, 0.05 mm or more, or 0.1 mm or more, and may be 20 mm or less, 10 mm or less, or 5 mm or less. ..
- the heat storage layer 2 may be a cured product in which the resin composition is completely cured, or may be a cured product in which the resin composition is B-staged (semi-cured).
- the heat storage layer 2 preferably has a resin composition of B from the viewpoint that the heat storage material 1A can be suitably adhered to the application target of the heat storage material 1A. It is a cured product that has been staged (semi-cured).
- the adhesive layer 3 may be composed of a known adhesive.
- the thickness of the adhesive layer 3 may be, for example, 0.001 mm or more, 0.003 mm or more, or 0.005 mm or more, and may be 0.03 mm or less, 0.02 mm or less, or 0.015 mm or less.
- the heat storage materials 1A and 1B can be used in various fields.
- the heat storage material 1 includes, for example, air conditioning equipment (improvement of efficiency of air conditioning equipment) in automobiles, buildings, public facilities, underground streets, etc., piping in factories (heat storage of piping), automobile engine (heat retention around the engine), and electronics. Used for parts (preventing temperature rise of electronic parts), fibers of underwear, etc.
- FIG. 2 is a schematic cross-sectional view showing an embodiment of an article and a method for manufacturing the article.
- an electronic component 11A is prepared as an article to which a heat storage material is provided.
- the electronic component 11A includes, for example, a substrate 12 and a semiconductor chip (heat source) 13 provided on the substrate 12.
- the sheet-shaped heat storage material 1 is arranged on the substrate 12 and the semiconductor chip 13 so as to be in thermal contact with each of the substrate 12 and the semiconductor chip 13.
- the heat storage material 1 may be, for example, the heat storage material 1A shown in FIG. 1 (a) described above, or may be the heat storage material 1B shown in FIG. 1 (b) described above.
- the heat storage material 1B shown in FIG. 1B is used, the heat storage material 1B is arranged so that the adhesive layer 3 is in contact with the substrate 12 and the semiconductor chip 13.
- the heat storage layer in the heat storage material 1 is a cured product in which the resin composition is B-staged (semi-cured)
- the heat storage layer is cured after the heat storage material 1 is arranged. That is, the method for manufacturing an article of the present embodiment may further include a step of curing the heat storage layer of the heat storage material 1 arranged on the substrate 12 and the semiconductor chip 13.
- the article 14A including the substrate 12, the semiconductor chip 13, and the heat storage material 1 (cured product of the resin composition) provided on the substrate 12 and the semiconductor chip 13 can be obtained.
- the heat storage material 1 is arranged so as to cover the entire exposed surface of the heat source 13, but in the other embodiment, the heat storage material is arranged so as to cover a part of the exposed surface of the heat source. May be good.
- FIG. 3A is a schematic cross-sectional view showing another embodiment of the article.
- the heat storage material 1 comes into contact with (covers a part of) a part of the exposed surface of the semiconductor chip (heat source) 13, for example. It may be arranged.
- the place where the heat storage material 1 is arranged is a side surface portion of the semiconductor chip 13 in FIG. 3A, but is on any surface of the semiconductor chip 13. May be good.
- FIG. 3B is a schematic cross-sectional view showing another embodiment of the article.
- the heat storage material 1 is arranged on the surface of the substrate 12 opposite to the surface on which the semiconductor chip 13 is provided.
- the heat storage material 1 is not in direct contact with the semiconductor chip 13, but is in thermal contact with the semiconductor chip 13 via the substrate 12.
- the location where the heat storage material 1 is arranged may be on any surface of the substrate 12 as long as it is in thermal contact with the semiconductor chip 13. Even in this case, the heat generated by the heat source (semiconductor chip) 13 is efficiently conducted to the heat storage material 1 via the substrate 12 and is suitably stored in the heat storage material 1.
- the heat storage material 1 is in the form of a sheet, but in the manufacturing method according to the other embodiment, an article is manufactured using the liquid resin composition (the heat storage material is formed). You can also do it.
- FIG. 4 is a schematic cross-sectional view showing another embodiment of the method for manufacturing an article.
- the electronic component 11B is prepared as an article to which the heat storage material is provided.
- the electronic component 11B includes, for example, a substrate (for example, a circuit board) 12, a semiconductor chip (heat source) 13 provided on the substrate 12, and a plurality of connecting portions (for example, solder) 15 for connecting the semiconductor chip 13 to the substrate 12. It has.
- the plurality of connecting portions 15 are provided between the substrate 12 and the semiconductor chip 13 so as to be separated from each other. That is, there is a gap between the substrate 12 and the semiconductor chip 13 that separates the plurality of connecting portions 15.
- the resin composition 21 is a resin composition according to the above-described embodiment.
- the resin composition 21 may be in a completely uncured state, or may be in a partially cured state.
- the resin composition 21 When the resin composition 21 is in a liquid state at room temperature (for example, 25 ° C.), the resin composition 21 can be filled at room temperature. When the resin composition 21 is in a solid state at room temperature, the resin composition 21 can be heated (for example, 50 ° C. or higher) into a liquid state and then filled.
- the resin composition 21 fills the above-mentioned gap existing between the substrate 12 and the semiconductor chip 13 with the substrate 12, It is arranged so as to be in thermal contact with each of the semiconductor chip 13 and the connecting portion 15.
- the cured product (heat storage layer or heat storage layer) of the resin composition is formed in the above gap existing between the substrate 12 and the semiconductor chip 13. 22 which can be said to be a heat storage material) is formed.
- the curing method of the resin composition 21 may be, for example, a method of curing the resin composition 21 by heating the arranged resin composition 21.
- An article 14D including a cured product (heat storage layer or heat storage material) 22 of a resin composition provided so as to fill the gaps formed by the plurality of connecting portions 15 can be obtained.
- the heat storage material 1 (cured product 22 of the resin composition) is arranged so as to be in direct contact with the semiconductor chip 13 which is the heat source, but the heat storage material and the cured product of the resin composition are heat sources. In another embodiment, for example, it may be arranged so as to be in thermal contact with a heat source via a heat conductive member (heat radiating member or the like).
- the melting point of the obtained acrylic resin was measured as follows and found to be 36 ° C. Using a differential scanning calorimeter (PerkinElmer, model number DSC8500), raise the temperature to 100 ° C at 20 ° C / min, hold at 100 ° C for 3 minutes, and then reach -30 ° C at a rate of 10 ° C / min. The thermal behavior of the acrylic resin was measured by lowering the temperature, holding at ⁇ 30 ° C. for 3 minutes, and then raising the temperature again to 100 ° C. at a rate of 10 ° C./min, and the melting peak was calculated as the melting point of the acrylic resin. ..
- [Making heat storage material] (Example 1) 37 parts by mass of acrylic resin, 63 parts by mass of vanadium dioxide (manufactured by Nippon Denko Co., Ltd., VS-40), and 0.2 mass of tertiary amine-based curing accelerator (manufactured by Sun Apro Co., Ltd., U-CAT660M) A resin composition was obtained by blending the parts. This resin composition is filled in a 10 cm ⁇ 10 cm ⁇ 1 mm mold (SUS plate), covered with a SUS plate, and then cured (moisture cured) at 180 ° C. under a pressure of 60 kPa to make it thicker. A sheet-shaped heat storage material having a thickness of 1 mm was obtained.
- Example 2 A heat storage material was prepared in the same manner as in Example 1 except that the composition of the resin composition was changed as shown in Table 1.
- Example 3 27.5 parts by mass of acrylic resin, 65.3 parts by mass of vanadium dioxide, 7.2 parts by mass of heat-storing capsule (BA410xxP, C28 manufactured by Outlast Technology Co., Ltd.), and 0.2 of a tertiary amine-based curing accelerator.
- a resin composition was obtained by blending with a mass portion. This resin composition is filled in a 10 cm ⁇ 10 cm ⁇ 1 mm mold (SUS plate), covered with a SUS plate, and then cured (moisture cured) at 180 ° C. under a pressure of 60 kPa to make it thicker. A sheet-shaped heat storage material having a thickness of 1 mm was obtained.
- Example 4 A heat storage material was prepared in the same manner as in Example 3 except that the composition of the resin composition was changed as shown in Table 1.
- Each heat storage material produced in the examples was measured using a differential scanning calorimetry meter (manufactured by PerkinElmer, model number DSC8500), and the melting point and heat storage amount were calculated. Specifically, the temperature is raised to 100 ° C. at 20 ° C./min, held at 100 ° C. for 3 minutes, then lowered to -30 ° C. at a rate of 10 ° C./min, and then held at -30 ° C. for 3 minutes. The temperature was raised again to 100 ° C. at a rate of 10 ° C./min and the thermal behavior was measured. The melting peak was defined as the melting point of the heat storage material, and the area was defined as the amount of heat storage. The results are shown in Table 1.
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Abstract
Description
・測定機器:HLC-8320GPC(製品名、東ソー(株)製)
・分析カラム:TSKgel SuperMultipore HZ-H(3本連結)(製品名、東ソー(株)製)
・ガードカラム:TSKguardcolumn SuperMP(HZ)-H(製品名、東ソー(株)製)
・溶離液:THF
・測定温度:25℃
撹拌機、温度計、窒素ガス導入管、排出管及び加熱ジャケットから構成された500mLフラスコを反応器とし、モノマーとしてメトキシポリプロエチレングリコールアクリレート(中村化学工業(株)製、AM-450G、式(3)におけるn=45)95質量部及び2-メタクリロイルオキシエチルイソシアネート5質量部と、酢酸エチル100質量部とを混合し、反応器に加え、室温下(25℃)で撹拌し、1時間、窒素を流した。その後、70℃に昇温し、昇温完了後、アゾビスイソブチロニトリル0.28質量部を酢酸エチル2質量部に溶解した溶液を反応器に添加し、反応を開始させた。その後、反応器内温度70℃で撹拌し、5時間反応させた。その後、アゾビスイソブチロニトリル0.05質量部をメチルエチルケトンに溶解した溶液を反応器に添加し、80℃まで昇温し、更に2時間反応させた。その後、溶媒の除去及び乾燥を行い、アクリル樹脂を得た。得られたアクリル樹脂の重量平均分子量(Mw)は、75000であった。
示差走査熱量測定計(パーキンエルマー社製、型番DSC8500)を用いて、20℃/分で100℃まで昇温し、100℃で3分間保持した後、10℃/分の速度で-30℃まで降温し、次いで-30℃で3分間保持した後、10℃/分の速度で100℃まで再び昇温することによって、アクリル樹脂の熱挙動を測定し、融解ピークをアクリル樹脂の融点として算出した。
(実施例1)
アクリル樹脂37質量部と、二酸化バナジウム(新日本電工(株)製、VS-40)63質量部と、第3級アミン系硬化促進剤(サンアプロ(株)製、U-CAT660M)0.2質量部とを配合し、樹脂組成物を得た。この樹脂組成物を10cm×10cm×1mmの型枠(SUS板)中に充填し、SUS板で上蓋をした後、60kPaの加圧下、180℃で1.5時間硬化(湿気硬化)させ、厚さ1mmのシート状の蓄熱材を得た。
樹脂組成物の組成を表1に示すとおりに変更した以外は、実施例1と同様の方法で蓄熱材を作製した。
アクリル樹脂27.5質量部と、二酸化バナジウム65.3質量部と、蓄熱性カプセル(アウトラストテクノロジー社製、BA410xxP,C28)7.2質量部と、第3級アミン系硬化促進剤0.2質量部とを配合し、樹脂組成物を得た。この樹脂組成物を10cm×10cm×1mmの型枠(SUS板)中に充填し、SUS板で上蓋をした後、60kPaの加圧下、180℃で1.5時間硬化(湿気硬化)させ、厚さ1mmのシート状の蓄熱材を得た。
樹脂組成物の組成を表1に示すとおりに変更した以外は、実施例3と同様の方法で蓄熱材を作製した。
実施例で作製した各蓄熱材を、示差走査熱量測定計(パーキンエルマー社製、型番DSC8500)を用いて測定し、融点と蓄熱量を算出した。具体的には、20℃/分で100℃まで昇温し、100℃で3分間保持した後、10℃/分の速度で-30℃まで降温し、次いで-30℃で3分間保持した後、10℃/分の速度で100℃まで再び昇温して熱挙動を測定した。融解ピークを蓄熱材の融点とし、面積を蓄熱量とした。結果を表1に示す。
Claims (13)
- 前記モノマー成分が、前記モノマーと共重合可能であり、反応性基を有するモノマーを更に含む、請求項1に記載の樹脂組成物。
- 前記アクリル樹脂が、反応性基を有する構造単位を更に含む、請求項2に記載の樹脂組成物。
- 前記反応性基が、カルボキシル基、ヒドロキシル基、イソシアネート基、アミノ基及びエポキシ基からなる群より選ばれる少なくとも1種の基である、請求項3又は4に記載の樹脂組成物。
- 前記反応性基と反応し得る硬化剤を更に含有する、請求項3~5のいずれか一項に記載の樹脂組成物。
- 前記硬化剤が、イソシアネート系硬化剤、フェノール系硬化剤、アミン系硬化剤、イミダゾール系硬化剤及び酸無水物系硬化剤からなる群より選ばれる少なくとも1種の硬化剤である、請求項6に記載の樹脂組成物。
- 前記蓄熱性無機材料が二酸化バナジウムを含む、請求項1~7のいずれか一項に記載の樹脂組成物。
- 蓄熱性有機材料を内包したカプセルを更に含有する、請求項1~8のいずれか一項に記載の樹脂組成物。
- 前記蓄熱性無機材料の含有量が、前記樹脂組成物全量基準で50質量%以上である、請求項1~9のいずれか一項に記載の樹脂組成物。
- 蓄熱材の形成に用いられる、請求項1~10のいずれか一項に記載の樹脂組成物。
- 請求項1~11のいずれか一項に記載の樹脂組成物の硬化物を含む、蓄熱材。
- 熱源と、
前記熱源と熱的に接触するように設けられた、請求項1~11のいずれか一項に記載の樹脂組成物の硬化物と、を備える物品。
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US17/633,211 US20220290025A1 (en) | 2019-08-09 | 2019-08-09 | Resin composition, heat storage material, and article |
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