WO2019220664A1 - 硬化性組成物、硬化性組成物セット、蓄熱材、及び物品 - Google Patents
硬化性組成物、硬化性組成物セット、蓄熱材、及び物品 Download PDFInfo
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- WO2019220664A1 WO2019220664A1 PCT/JP2018/042161 JP2018042161W WO2019220664A1 WO 2019220664 A1 WO2019220664 A1 WO 2019220664A1 JP 2018042161 W JP2018042161 W JP 2018042161W WO 2019220664 A1 WO2019220664 A1 WO 2019220664A1
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- C08F20/00—Homopolymers and 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
- C08F20/02—Monocarboxylic acids having less than ten carbon atoms, Derivatives thereof
- C08F20/10—Esters
- C08F20/12—Esters of monohydric alcohols or phenols
- C08F20/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
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- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
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- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
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Definitions
- the present invention relates to a curable composition, a curable composition set, a heat storage material, and an article.
- the heat storage material is a material that can take out the stored energy as heat if necessary. This heat storage material is used in applications such as air conditioning equipment, floor heating equipment, electronic parts such as refrigerators and IC chips, automobile interior and exterior materials, automobile parts such as canisters, and heat insulation containers.
- latent heat storage using phase change of a substance is widely used from the viewpoint of the amount of heat.
- Water-ice is well known as a latent heat storage material.
- Water-ice is a substance with a large amount of heat, but its phase change temperature is limited to 0 ° C. in the atmosphere, so the application range is also limited. Therefore, paraffin is used as a latent heat storage material having a phase change temperature higher than 0 ° C. and lower than 100 ° C.
- paraffin becomes liquid when it changes phase by heating, and there is a risk of ignition and ignition. Therefore, in order to use paraffin as a heat storage material, it is stored in a sealed container such as a bag, and paraffin is removed from the heat storage material. Need to be prevented from leaking, subject to restrictions in the field 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.
- an object of the present invention is to provide a curable composition or a curable composition set that is suitably used for a heat storage material.
- the present inventors have found that a curable composition or a curable composition set containing a specific component is suitably used as a heat storage material, that is, the curable composition or the curable composition.
- the present inventors have found that a heat storage material obtained by using an object set is excellent in heat storage amount, and completed the present invention.
- the present invention provides the following [1] to [17]. [1] A curable composition containing a compound having a (meth) acryloyl group, a capsule containing a heat storage component, and a polymerization initiator.
- (meth) acryloyl means “acryloyl” and “methacryloyl” corresponding thereto, and the same applies to similar expressions such as “(meth) acrylate” and “(meth) acryl”. .
- the weight average molecular weight (Mw) in the present specification means a value determined using gel permeation chromatography (GPC) under the following conditions and determined using polystyrene as a standard substance.
- GPC gel permeation chromatography
- Measuring instrument HLC-8320GPC (product name, manufactured by Tosoh Corporation)
- Analytical column TSKgel SuperMultipore HZ-H (consolidated 3) (product name, manufactured by Tosoh Corporation)
- Guard column TSK guard column SuperMP (HZ) -H (product name, manufactured by Tosoh Corporation)
- Eluent THF ⁇ Measurement temperature: 25 °C
- a curable composition according to an embodiment includes a compound having a (meth) acryloyl group, a capsule containing a heat storage component (hereinafter, also referred to as “heat storage capsule”), and a polymerization initiator. .
- the compound having a (meth) acryloyl group may contain a monomer having a (meth) acryloyl group.
- the monomer having a (meth) acryloyl group may include, for example, a compound represented by the following formula (2) (hereinafter also referred to as “(meth) acrylic monomer”).
- R 3 represents a hydrogen atom or a methyl group
- R 4 represents an organic group.
- the organic group represented by R 4 may be, for example, a hydrocarbon group, a group having an oxygen atom, a group containing a silicon atom, or a group containing a halogen atom.
- the hydrocarbon group may be an alkyl group, a cycloalkyl group, an aromatic hydrocarbon group, or the like.
- the group having an oxygen atom may be a group having a polyoxyalkylene chain, a heterocycle-containing group, an alkoxy group, or the like.
- the group containing a silicon atom may be a group having a silane group or a group having a siloxane bond.
- the organic group represented by R 4 is preferably a hydrocarbon group, more preferably an alkyl group.
- the alkyl group may be linear or branched.
- the alkyl group may be an alkyl group having 1 to 30 carbon atoms.
- the alkyl group may have 1 to 11, 1 to 8, 1 to 6, or 1 to 4, 12 to 30, 12 to 28, 12 to 24, 12 to 22, 12 to 18 Or 12-14.
- Examples of the (meth) acrylic monomer represented by the formula (1), wherein R 4 is a linear alkyl group, include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, and butyl (meth) acrylate. , Pentyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate, octyl (meth) acrylate, nonyl (meth) acrylate, decyl (meth) acrylate, or undecyl (meth) acrylate, etc.
- Examples of the (meth) acrylic monomer represented by the formula (1) in which R 4 is a branched alkyl group include s-butyl (meth) acrylate, t-butyl (meth) acrylate, isobutyl (meth) acrylate, isopentyl ( (Meth) acrylate, isohexyl (meth) acrylate, isoheptyl (meth) acrylate, isoamyl (meth) acrylate, isooctyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isononyl (meth) acrylate, isodecyl (meth) acrylate, (Meth) acrylic monomers having 1 to 11 carbon atoms, such as 2-propylheptyl (meth) acrylate and isoundecyl (meth) acrylate, isomyristyl (meth) acrylate, isodode
- Examples of the (meth) acrylic monomer represented by the formula (1) and wherein R 4 is a cycloalkyl group include cyclohexyl (meth) acrylate, 3,3,5-trimethylcyclohexyl (meth) acrylate, isobornyl (meth) acrylate, terpene (Meth) acrylate, dicyclopentanyl (meth) acrylate, etc. are mentioned.
- Examples of the (meth) acrylic monomer represented by the formula (1) and R 4 being an aromatic hydrocarbon group include benzyl (meth) acrylate.
- Examples of the (meth) acrylic monomer represented by the formula (1) and R 4 having a polyoxyalkylene chain include polyethylene glycol (meth) acrylate, methoxypolyethylene glycol (meth) acrylate, polypropylene glycol (meth) acrylate, Examples include methoxypolypropylene glycol (meth) acrylate, polybutylene glycol (meth) acrylate, and methoxypolybutylene glycol (meth) acrylate.
- Tetrahydrofurfuryl (meth) acrylate etc. are mentioned as a (meth) acryl monomer which is represented by Formula (1) and R ⁇ 4 > is a heterocyclic containing group.
- Examples of the (meth) acrylic monomer represented by the formula (1) in which R 4 is a group containing oxygen include (meth) acrylate having an alkoxy group such as 2-methoxyethyl acrylate, phenoxyethyl (meth) acrylate, and the like. Can be mentioned.
- the (meth) acrylic monomer represented by the formula (1) and R 4 having a silane group includes 3-acryloxypropyltriethoxysilane, 10-methacryloyloxydecyltrimethoxysilane, 10-acryloyloxydecyltri. Examples include methoxysilane, 10-methacryloyloxydecyltriethoxysilane, 10-acryloyloxydecyltriethoxysilane, and the like.
- Examples of the (meth) acrylic monomer represented by the formula (1) and having R 4 having a siloxane bond include silicone (meth) acrylate.
- Examples of the (meth) acrylic monomer represented by the formula (1) and wherein R 4 is a group containing a halogen atom include trifluoromethyl (meth) acrylate, 2,2,2-trifluoroethyl (meth) acrylate, 1 , 1,1,3,3,3-hexafluoro-2-propyl (meth) acrylate, perfluoroethylmethyl (meth) acrylate, perfluoropropylmethyl (meth) acrylate, perfluorobutylmethyl (meth) acrylate, Fluoropentylmethyl (meth) acrylate, perfluorohexylmethyl (meth) acrylate, perfluoroheptylmethyl (meth) acrylate, perfluorooctylmethyl (meth) acrylate, perfluorononylmethyl (meth) acrylate, perfluorodecylmethyl (meta Acu Relate, perfluoroundecylmethyl (me
- the (meth) acrylic monomers described above may be used singly or in combination of two or more.
- the compound having a (meth) acryloyl group may contain a polymer having a (meth) acryloyl group.
- Polymers having a (meth) acryloyl group include polyacryl (meth) acrylate, polyurethane (meth) acrylate, polyester (meth) acrylate, polyether (meth) acrylate, polyepoxy (meth) acrylate, and terminal (meth) acrylic. Examples thereof include modified polybutadiene.
- the polymer having a (meth) acryloyl group is polyacryl (meth) acrylate
- the polymer may be a polymer having a structural unit represented by the following formula (3).
- R 5 and R 7 each independently represent a hydrogen atom or a methyl group
- R 6 represents a divalent organic group.
- the divalent organic group represented by R 6 is not particularly limited, and may be a group incidentally generated when a (meth) acryloyl group is introduced by a method described later.
- the divalent organic group may be a group represented by any of the following formulas (4) to (7), for example.
- R 8 and R 9 each independently represent a divalent hydrocarbon group, and * represents a bond (the same applies hereinafter).
- R 10 and R 11 each independently represent a divalent hydrocarbon group.
- R 12 and R 13 each independently represents a divalent hydrocarbon group.
- R 14 and R 15 each independently represents a divalent hydrocarbon group.
- the divalent hydrocarbon group represented by R 8 to R 15 may be an alkylene group or a cycloalkylene group. When the divalent hydrocarbon group is an alkylene group, the alkylene group may be linear or branched.
- the carbon number of the divalent hydrocarbon group represented by R 8 to R 15 may be, for example, 1 to 10, 1 to 8, 1 to 6, 1 to 4, or 1 to 2.
- the content of the structural unit represented by the formula (3) may be 2 parts by mass or more with respect to 100 parts by mass of all the structural units constituting the polyacryl (meth) acrylate. 25 parts by mass or less, 20 parts by mass or less, 16 parts by mass or less, or 13 parts by mass or less.
- the polyacryl (meth) acrylate may have a structural unit derived from the (meth) acrylic monomer represented by the formula (2) described above. That is, polyacryl (meth) acrylate may have a structural unit represented by the following formula (8).
- R 16 represents a hydrogen atom or a methyl group
- R 17 represents an organic group. The organic group represented by R 17 may be the same as the organic group represented by R 4 described above.
- the content of the structural unit represented by the formula (8) is 100 mass of all structural units constituting the polyacryl (meth) acrylate. 60 parts by mass or more, 70 parts by mass or more, or 80 parts by mass or more, and 98 parts by mass or less.
- the weight average molecular weight of the polyacryl (meth) acrylate is preferably 100,000 or less, more preferably 70,000 or less, and still more preferably 40000 or less, from the viewpoint of facilitating handling by reducing the viscosity of the curable composition.
- the weight average molecular weight of polyacryl (meth) acrylate may be 5000 or more, for example.
- the polyacryl (meth) acrylate having the structural unit represented by the formula (3) can be obtained, for example, by the following method. That is, a method for obtaining a polyacryl (meth) acrylate is a monomer component comprising a first monomer and a monomer copolymerizable with the first monomer and having a reactive group a (second monomer) ( A step of polymerizing the monomer component a) to obtain a polyacrylic (meth) acrylate intermediate having a reactive group a, a polyacrylic (meth) acrylate intermediate obtained, and a polyacrylic (meth) acrylate intermediate Reacting with a monomer component (monomer component b) containing a monomer having a reactive group b capable of reacting with the reactive group a (third monomer).
- the first monomer may be a monomer similar to the (meth) acrylic monomer represented by the above formula (2).
- the monomer component a may include one or more (meth) acrylic monomers represented by the formula (2) as the first monomer.
- the second monomer has a (meth) acryloyl group so that it can be copolymerized with the first monomer. That is, the second monomer is preferably a monomer having a reactive group a and a (meth) acryloyl group (a (meth) acrylic monomer having a reactive group a).
- the reactive group a is a group that can react with a third monomer described later, and is, for example, at least one group selected from the group consisting of a hydroxyl group, an amino group, and an epoxy group. That is, the second monomer may be, for example, a hydroxyl group-containing (meth) acrylic monomer, an amino group-containing (meth) acrylic monomer, or an epoxy group-containing (meth) acrylic monomer.
- hydroxyl group-containing (meth) acrylic monomer examples include 2-hydroxyethyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6-hydroxyhexyl (meth) acrylate, 8 -Hydroxyalkyl (meth) acrylates such as hydroxyoctyl (meth) acrylate, 10-hydroxydecyl (meth) acrylate, 12-hydroxylauryl (meth) acrylate; (4-hydroxymethylcyclohexyl) methyl (meth) acrylate, etc.
- Examples include hydroxyalkylcycloalkane (meth) acrylate.
- amino group-containing (meth) acrylic monomers examples include N, N-dimethylaminoethyl (meth) acrylate, N, N-diethylaminoethyl (meth) acrylate, N, N-dimethylaminopropyl (meth) acrylate, N, N Examples thereof include N-diethylaminopropyl (meth) acrylate.
- epoxy group-containing (meth) acrylic monomer examples include glycidyl (meth) acrylate, glycidyl ⁇ -ethyl (meth) acrylate, glycidyl ⁇ -n-propyl (meth) acrylate, ⁇ -n-butyl (meth).
- Glycidyl acrylate (meth) acrylic acid-3,4-epoxybutyl, (meth) acrylic acid-4,5-epoxypentyl, (meth) acrylic acid-6,7-epoxyheptyl, ⁇ -ethyl (meth) acrylic Acid-6,7-epoxyheptyl, (meth) acrylic acid-3-methyl-3,4-epoxybutyl, (meth) acrylic acid-4-methyl-4,5-epoxypentyl, (meth) acrylic acid-5 -Methyl-5,6-epoxyhexyl, (meth) acrylic acid- ⁇ -methylglycidyl, ⁇ -ethyl (meth) acrylic acid- ⁇ -methylglycidyl Etc. The.
- the method for polymerizing the monomer component a can be appropriately selected from known polymerization methods such as various radical polymerizations, and may be, for example, a suspension polymerization method, a solution polymerization method, a bulk polymerization method, or the like.
- the step of reacting the polyacrylic (meth) acrylate intermediate and the monomer component b may be a step of reacting the third monomer with the polyacrylic (meth) acrylate intermediate by an addition reaction.
- the addition reaction may be performed, for example, by heating a mixture of the polyacryl (meth) acrylate intermediate and the monomer component b.
- the reaction temperature at this time may be 50 ° C. or higher and 120 ° C. or lower.
- the third monomer contained in the monomer component b is a monomer that can react with the polyacrylic (meth) acrylate intermediate, and the reactive group b that can react with the reactive group a in the polyacrylic (meth) acrylate intermediate. It is a monomer.
- the third monomer is a monomer having a reactive group b and a (meth) acryloyl group (a (meth) acrylic monomer having a reactive group b).
- the (meth) acryloyl group in the structural unit represented by the formula (3) is derived from the (meth) acryloyl group in the third monomer.
- the reactive group b in the third monomer is a group that can react with the polyacrylic (meth) acrylate intermediate, and more specifically, can react with the reactive group a in the polyacrylic (meth) acrylate intermediate. It is a group.
- the reactive group b in the third monomer is, for example, at least one group selected from the group consisting of an isocyanate group and a carboxyl group. That is, the third monomer is, for example, an isocyanate group-containing (meth) acrylic monomer or a carboxyl group-containing (meth) acrylic monomer.
- Examples of the isocyanate group-containing (meth) acrylic monomer include 2-isocyanatoethyl methacrylate and 2-acryloyloxyethyl isocyanate.
- carboxyl group-containing (meth) acrylic monomer examples include (meth) acrylic acid, carboxyethyl (meth) acrylate, and carboxypentyl (meth) acrylate.
- the content of the compound having the (meth) acryloyl group described above in the curable composition is based on the total amount of the curable composition from the viewpoint of suppressing the dropout of the heat storage capsule from the cured product of the curable composition.
- it is 10% by mass or more, more preferably 15% by mass or more, further preferably 20% by mass or more, and from the viewpoint of further improving the heat storage property, preferably 60% by mass or less, more preferably 50% by mass or less. More preferably, it is 35% by mass or less.
- the capsule containing the heat storage component has a heat storage component and an outer shell (shell) containing the heat storage component.
- the heat storage component only needs to be a component capable of storing heat, and may be, for example, a component having heat storage properties accompanying phase transition.
- a component having a phase transition temperature suitable for the target temperature is appropriately selected according to the purpose of use. From the viewpoint of obtaining a heat storage effect in a practical range, the heat storage component has a solid phase / liquid phase transition point (melting point) showing a solid phase / liquid phase transition at, for example, ⁇ 30 to 120 ° C.
- Thermal storage components include, for example, chain saturated hydrocarbon compounds (paraffinic hydrocarbon compounds), organic compounds such as natural wax, petroleum wax, polyethylene glycol, sugar alcohol, or hydrates of inorganic compounds, crystal structure changes It may be an inorganic compound such as an inorganic compound.
- the heat storage component is preferably a chain-like saturated hydrocarbon compound (paraffinic hydrocarbon compound) from the viewpoint that it is inexpensive, has low toxicity, and can easily select one having a desired phase transition temperature.
- chain means linear or branched (branched).
- the chain-like saturated hydrocarbon compound includes n-decane (C10 (carbon number, hereinafter the same), ⁇ 29 ° C. (transition point (melting point), the same hereinafter)), n-undecane (C11, ⁇ 25).
- n-dodecane C12, -9 ° C
- n-tridecane C13, -5 ° C
- n-tetradecane C14, 6 ° C
- n-pentadecane C15, 9 ° C
- n-hexadecane C16
- n-heptadecane C17, 21 ° C
- n-octadecane C18, 28 ° C
- n-nanodecane C19, 32 ° C
- n-eicosane C20, 37 ° C
- n-henicosane C21) 41 ° C
- n-docosane C22, 46 ° C
- n-tricosane C23, 47 ° C
- n-tetracosane C24, 50 ° C
- n-pentacosane C25, 54 ° C
- n-dodecane C12
- the outer shell (shell) containing these heat storage components is preferably made of a material having a heat resistance temperature sufficiently higher than the transition point (melting point) of the heat storage components.
- 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 component.
- the heat-resistant temperature is defined as the temperature at which 1% weight was reduced when the weight loss of the capsule was measured using a differential thermothermal gravimetric simultaneous measurement device (eg TG-DTA6300 (manufactured by Hitachi High-Tech Science Co., Ltd.)). Is done.
- the outer shell may preferably be formed of melamine resin, acrylic resin, urethane resin, silica or the like.
- the microcapsules having an outer shell made of melamine resin include BA410xxP, 18C, BA410xxP, 37C manufactured by Outlast Technology, Thermo Memory FP-16, FP-25, FP-31 manufactured by Mitsubishi Paper Industries, Ltd.
- Examples include FP-39, Riken Resin PMCD-15SP, 25SP, 32SP manufactured by Miki Riken Kogyo Co., Ltd.
- microcapsules having an outer shell made of an acrylic resin include MicroDS5001X and 5040X manufactured by BASF.
- Examples of the microcapsules having an outer shell made of silica include Riken Resins LA-15, LA-25, and LA-32 manufactured by Miki Riken Kogyo Co., Ltd.
- the content of the heat storage component is preferably 20% by mass or more, more preferably 60% by mass or more, based on the total amount of the heat storage capsule, and capsule breakage due to the volume change of the heat storage component From the viewpoint of suppressing the content, it is preferably 80% by mass or less.
- the heat storage capsule may further contain graphite, metal powder, alcohol or the like in the outer shell for the purpose of adjusting the thermal conductivity, specific gravity and the like of the capsule.
- the particle diameter (average particle diameter) 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, more preferably 50 ⁇ m or less. .
- the particle size (average particle size) of the heat storage 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 method for producing the heat storage capsule it is appropriate according to the heat storage component, the material of the outer shell, etc. from the conventional known production methods such as interfacial polymerization method, in-situ polymerization method, submerged curing coating method, coacervate method, etc. You can choose the right method.
- the content of the heat storage capsule is preferably 40% by mass or more, more preferably 50% by mass or more, and further preferably 55% by mass or more, based on the total amount of the curable composition.
- the content of the heat storage capsule is preferably 90% by mass or less, more preferably 85% by mass or less, and still more preferably 80% by mass or less, from the viewpoint of suppressing the drop of the heat storage capsule from the cured product of the curable composition. It is.
- the polymerization initiator may be a polymerization initiator that generates radicals under anaerobic conditions.
- a polymerization initiator that generates radicals under anaerobic conditions is used, the above-described compound having a (meth) acryloyl group is polymerized under anaerobic conditions, that is, in a state where oxygen present in the air is blocked. Thereby, the hardened
- the polymerization initiator that generates radicals under anaerobic conditions is not particularly limited as long as it is a polymerization initiator used in an anaerobic curable composition.
- a polymerization initiator used in an anaerobic curable composition for example, cumene hydroperoxide, t-butyl hydroperoxide , P-methane hydroperoxide, methyl ethyl ketone peroxide, cyclohexane peroxide, dicumyl peroxide, diisopropylbenzene hydroperoxide, and other hydroperoxide compounds, ketone peroxide compounds, diallyl peroxide compounds, peroxyester compounds, etc.
- organic peroxides These organic peroxides may be used alone or in combination of two or more.
- cumene hydroperoxide compounds are preferably used from the viewpoint of reactivity.
- the curable composition may further contain a polymerization accelerator for the purpose of increasing the polymerization rate under anaerobic conditions.
- the polymerization accelerator may be, for example, acetylphenylhydrazine, saccharin, or the like.
- the content of the polymerization accelerator is, for example, 0.01% by mass or more and 5% by mass or less based on the total amount of the cured composition.
- the polymerization initiator may be a polymerization initiator that generates radicals by heat.
- a polymerization initiator that generates radicals by heat is used, the compound having the (meth) acryloyl group described above is polymerized by applying heat to the curable composition. Thereby, the hardened
- the curable composition is preferably a curable composition that is cured by heating at 105 ° C or higher, more preferably 110 ° C or higher, and even more preferably 115 ° C or higher.
- it may be a curable composition that is cured by heating at 200 ° C. or lower, 190 ° C. or lower, or 180 ° C. or lower.
- the heating time for heating the curable composition may be appropriately selected according to the composition of the curable composition so that the curable composition is suitably cured.
- azo compounds such as azobisisobutyronitrile, azobis-4-methoxy-2,4-dimethylvaleronitrile, azobiscyclohexanone-1-carbonitrile, azodibenzoyl, Benzoyl peroxide, lauroyl peroxide, di-t-butylperoxyhexahydroterephthalate, t-butylperoxy-2-ethylhexanoate, 1,1-t-butylperoxy-3,3,5-trimethylcyclohexane And organic peroxides such as t-butylperoxyisopropyl carbonate.
- These polymerization initiators that generate radicals by heat may be used singly or in combination of two or more.
- the polymerization initiator may be a polymerization initiator that generates radicals by light.
- a polymerization initiator that generates radicals by light for example, the above-described (Metal ) A compound having an acryloyl group is polymerized. Thereby, the hardened
- the light irradiation conditions may be appropriately set depending on the type of the polymerization initiator.
- the polymerization initiator that generates radicals by light is not particularly limited as long as it initiates photopolymerization, and a commonly used photopolymerization initiator can be used.
- Examples of polymerization initiators that generate radicals by light include benzoin ether photopolymerization initiators, acetophenone photopolymerization initiators, ⁇ -ketol photopolymerization initiators, aromatic sulfonyl chloride photopolymerization initiators, and photoactive oximes.
- Photopolymerization initiator benzoin photopolymerization initiator, benzyl photopolymerization initiator, benzophenone photopolymerization initiator, ketal photopolymerization initiator, thioxanthone photopolymerization initiator, acylphosphine oxide photopolymerization initiator Etc.
- Benzoin ether photopolymerization initiators include benzoin methyl ether, benzoin ethyl ether, benzoin propyl ether, benzoin isopropyl ether, benzoin isobutyl ether, 2,2-dimethoxy-1,2-diphenylethane-1-one (trade name: IRGACURE 651, manufactured by BASF), anisole methyl ether, and the like.
- 1-hydroxycyclohexyl phenyl ketone (trade name: Irgacure 184, manufactured by BASF), 4-phenoxydichloroacetophenone, 4-t-butyl-dichloroacetophenone, 1- [4- (2- Hydroxyethoxy) -phenyl] -2-hydroxy-2-methyl-1-propan-1-one (trade name: Irgacure 2959, manufactured by BASF), 2-hydroxy-2-methyl-1-phenyl-propane-1- ON (trade name: DAROCURE 1173, manufactured by BASF), methoxyacetophenone and the like.
- Examples of ⁇ -ketol photopolymerization initiators include 2-methyl-2-hydroxypropiophenone, 1- [4- (2-hydroxyethyl) -phenyl] -2-hydroxy-2-methylpropan-1-one, etc. Is mentioned.
- Examples of aromatic sulfonyl chloride photopolymerization initiators include 2-naphthalenesulfonyl chloride.
- Examples of the photoactive oxime photopolymerization initiator include 1-phenyl-1,1-propanedione-2- (o-ethoxycarbonyl) -oxime.
- Examples of the benzoin photopolymerization initiator include benzoin.
- Examples of the benzyl photopolymerization initiator include benzyl.
- Examples of the benzophenone photopolymerization initiator include benzophenone, benzoylbenzoic acid, 3,3′-dimethyl-4-methoxybenzophenone, polyvinylbenzophenone, ⁇ -hydroxycyclohexyl phenyl ketone, and the like.
- Examples of the ketal photopolymerization initiator include benzyl dimethyl ketal.
- Thioxanthone photopolymerization initiators include thioxanthone, 2-chlorothioxanthone, 2-methylthioxanthone, 2,4-dimethylthioxanthone, isopropylthioxanthone, 2,4-dichlorothioxanthone, 2,4-diethylthioxanthone, isopropylthioxanthone, 2, 4-diisopropylthioxanthone, dodecylthioxanthone and the like can be mentioned.
- acylphosphine photopolymerization initiator examples include bis (2,6-dimethoxybenzoyl) phenylphosphine oxide, bis (2,6-dimethoxybenzoyl) (2,4,4-trimethylpentyl) phosphine oxide, bis ( 2,6-dimethoxybenzoyl) -n-butylphosphine oxide, bis (2,6-dimethoxybenzoyl)-(2-methylpropan-1-yl) phosphine oxide, bis (2,6-dimethoxybenzoyl)-(1- Methylpropan-1-yl) phosphine oxide, bis (2,6-dimethoxybenzoyl) -t-butylphosphine oxide, bis (2,6-dimethoxybenzoyl) cyclohexylphosphine oxide, bis (2,6-dimethoxybenzoyl) octylphosphine Oxide, bis (2-me
- the above polymerization initiators that generate radicals by light may be used singly or in combination of two or more.
- the content of the polymerization initiator described above is preferably 0.01 with respect to 100 parts by mass of the compound having a (meth) acryloyl group from the viewpoint of sufficiently polymerizing the compound having a (meth) acryloyl group. It is at least 0.02 parts by mass, more preferably at least 0.05 parts by mass, even more preferably at least 0.05 parts by mass.
- the content of the polymerization initiator is within the preferable range of the molecular weight of the cured product of the curable composition, suppresses decomposition products, and provides a suitable adhesive strength when used as a heat storage material.
- the content of the compound having a (meth) acryloyl group is preferably 10 parts by mass or less, more preferably 5 parts by mass or less, still more preferably 3 parts by mass or less, and particularly preferably 1 part by mass or less with respect to 100 parts by mass.
- the curable composition is also referred to as a compound containing a structural unit (structural unit (A)) represented by the following formula (1) (hereinafter referred to as “heat storage (meth) acrylic polymer”). ) May be further contained.
- structural unit (A) structural unit represented by the following formula (1)
- heat storage (meth) acrylic polymer a structural unit represented by the following formula (1)
- R 1 represents a hydrogen atom or a methyl group
- R 2 represents an alkyl group having 12 to 30 carbon atoms or a group having a polyoxyalkylene chain.
- R 2 is an alkyl group
- the alkyl group may be linear or branched.
- the number of carbon atoms of the alkyl group represented by R 2 is preferably 12 to 28, more preferably 12 to 26, still more preferably 12 to 24, and particularly preferably 12 to 22.
- Examples of the alkyl group represented by R 2 include dodecyl group (lauryl group), tetradecyl group, hexadecyl group), octadecyl group (stearyl group), docosyl group (behenyl group), tetracosyl group, hexacosyl group, octacosyl group, and the like. Is mentioned.
- the alkyl group represented by R 2 is preferably at least one selected from the group consisting of a dodecyl group (lauryl group), a hexadecyl group, an octadecyl group (stearyl group), and a docosyl group (behenyl group).
- R 2 is a group having a polyoxyalkylene chain
- the group having a polyoxyalkylene chain is a group represented by the following formula (9), that is, a polyoxyethylene chain, a polyoxypropylene chain, and a polyoxybutylene chain. It may be a group having at least one polyoxyalkylene chain selected from the group consisting of:
- R a represents a hydrogen atom or an alkyl group having 1 to 18 carbon atoms
- m represents an integer of 2 to 4
- n represents an integer of 2 to 90
- * represents a bond.
- a plurality of (CH 2 ) m present in the group represented by R 2 may be the same as or different from each other. That is, the group having a polyoxyalkylene chain represented by R 4 may have only one kind of a polyoxyethylene chain, a polyoxypropylene chain, and a polyoxybutylene chain, and has two or more kinds. May be.
- the alkyl group represented by R a may be linear or branched.
- the number of carbon atoms of the alkyl group represented by R a is preferably 1 to 15, more preferably 1 to 10, and still more preferably 1 to 5.
- R a is particularly preferably a hydrogen atom or a methyl group.
- M is preferably 2 or 3, more preferably 2.
- n is preferably an integer of 4 to 80, 6 to 60, 9 to 40, 9 to 30, 10 to 30, 15 to 30, or 15 to 25 from the viewpoint of further improving the heat storage amount of the heat storage material.
- the heat storage (meth) acrylic polymer may contain one or more of the structural units (A) described above.
- the content of the structural unit (A) is preferably 60 parts by mass or more, more preferably 100 parts by mass or more with respect to 100 parts by mass of all structural units constituting the heat storage (meth) acrylic polymer, from the viewpoint of further improving the heat storage amount of the heat storage material. Is 80 parts by mass or more, for example, 98 parts by mass or less.
- the heat storage (meth) acrylic polymer may contain a structural unit having a reactive group (structural unit (B)) in addition to the structural unit (A).
- the reactive group which the structural unit (B) has is a group capable of reacting with a curing agent described later, for example, at least one selected from the group consisting of a carboxyl group, a hydroxyl group, an isocyanate group, an amino group and an epoxy group. It is a group.
- the structural unit (B) preferably has an epoxy group as a reactive group, more preferably a glycidyl group, from the viewpoint of increasing the choice of curing agent.
- the heat storage (meth) acrylic polymer may contain one or more of these structural units.
- the structural unit (B) is preferably a structural unit represented by the following formula (10).
- R 18 represents a hydrogen atom or a methyl group
- R 19 represents an organic group having a hydrogen atom or a reactive group.
- the reactive group represented by R 19 may be the reactive group described above, preferably an organic group having an epoxy group, and more preferably a glycidyl group.
- the content of the structural unit (B) is the heat storage (meth) acrylic from the viewpoint of obtaining a further excellent heat storage amount when the heat storage material is formed. It may be 2 parts by mass or more, may be 25 parts by mass or less, preferably 20 parts by mass or less, more preferably 15 parts by mass or less, and still more preferably 100 parts by mass of all structural units constituting the polymer. 13 parts by mass or less, particularly preferably 10 parts by mass or less.
- the weight average molecular weight of the heat storage (meth) acrylic polymer is preferably 100,000 or less, more preferably 70,000 or less, still more preferably 40,000 or less, for example, 5000 or more.
- the content is preferably 10% by mass or more, more preferably 20% by mass based on the total amount of the curable composition from the viewpoint of further enhancing the heat storage effect.
- the curable composition can further contain other additives as required.
- Other additives include, for example, curing agents, curing accelerators, antioxidants, colorants, fillers, crystal nucleating agents, thermal stabilizers, thermal conductive materials, plasticizers, foaming agents, flame retardants, vibration damping agents, Examples include flame retardant aids (for example, metal oxides).
- flame retardant aids for example, metal oxides.
- Other additives may be used alone or in combination of two or more.
- the curable composition when the curable composition contains a heat storage (meth) acrylic polymer containing the structural unit (B), the curable composition may further contain a curing agent.
- the curing agent may be any curing agent that reacts with the reactive group in the structural unit (B), and may be, for example, an isocyanate compound, a phenol compound, an amine compound, an imidazole compound, an acid anhydride, or a carboxylic acid compound.
- the content of other additives may be, for example, 0.1% by mass or more and 30% by mass or less based on the total amount of the curable composition.
- the curable composition may be liquid at 50 ° C. Thereby, a curable composition can be easily provided by methods, such as filling, between the members which have a complicated shape.
- the viscosity at 50 ° C. of the curable composition is preferably 100 Pa ⁇ s or less, more preferably 50 Pa ⁇ s or less, still more preferably 20 Pa ⁇ s or less, and particularly preferably 10 Pa ⁇ s, from the viewpoint of excellent fluidity and handling properties. It is as follows.
- the viscosity of the curable composition at 50 ° C. may be, for example, 0.5 Pa ⁇ s or more.
- the viscosity of the curable composition means a value measured based on JIS Z 8803, and specifically measured by an E type viscometer (for example, PE-80L manufactured by Toki Sangyo Co., Ltd.). Mean value.
- the viscometer can be calibrated based on JIS Z 8809-JS14000.
- the curable composition set which concerns on one Embodiment is a curable composition set (two-component curable composition set) provided with the 1st liquid containing an oxidizing agent, and the 2nd liquid containing a reducing agent. is there. At least one of the first liquid and the second liquid contains the compound having the (meth) acryloyl group described above. At least one of the first liquid and the second liquid contains a capsule (heat storage capsule) containing the heat storage component described above.
- omitted is about the aspect of a compound and a heat storage capsule which have a (meth) acryloyl group, since it is the same as the aspect used for a curable composition.
- the first liquid may contain only an oxidizing agent, may contain an oxidizing agent and a compound having a (meth) acryloyl group, and may contain an oxidizing agent and a (meth) acryloyl group.
- the compound which has and a heat storage capsule may be contained, and an oxidizing agent and a heat storage capsule may be contained.
- the second liquid may contain only a reducing agent, may contain a reducing agent and a compound having a (meth) acryloyl group, and contains a reducing agent, a compound having a (meth) acryloyl group, and a heat storage capsule. Alternatively, it may contain a reducing agent and a heat storage capsule.
- the curable composition set preferably includes an oxidizing agent, a first liquid containing a compound having a (meth) acryloyl group, and a heat storage capsule, a reducing agent, a compound having a (meth) acryloyl group, and a heat storage capsule.
- the oxidizing agent and the reducing agent react to generate radicals, and the mixture (curable composition) is polymerized.
- cured material of a mixture (curable composition) is obtained.
- cured material of the mixture (curable composition) of a 1st liquid and a 2nd liquid is obtained immediately by mixing a 1st liquid and a 2nd liquid. . That is, in the curable composition set according to the present embodiment, a mixture (curable composition) containing a compound having a (meth) acryloyl group can be polymerized at a high rate to obtain a cured product of the mixture.
- the content of the compound having a (meth) acryloyl group is preferably 10 on the basis of the total amount of the first liquid and the second liquid from the viewpoint of suppressing the drop of the heat storage capsule from the cured product of the curable composition.
- % By mass or more, more preferably 15% by mass or more, further preferably 20% by mass or more, and preferably 60% by mass or less, more preferably 55% by mass or less, and still more preferably from the viewpoint of further improving the heat storage property. Is 50 mass% or less.
- the content of the heat storage capsule (the total content of the heat storage capsules contained in the first liquid and the second liquid) is the total amount of the first liquid and the second liquid.
- it is preferably 40% by mass or more, more preferably 50% by mass or more, and further preferably 55% by mass or more.
- the content of the heat storage capsule is preferably 90% by mass or less, more preferably 85, from the viewpoint of suppressing the drop of the heat storage capsule from the cured product of the mixture of the first liquid and the second liquid (curable composition). It is not more than mass%, more preferably not more than 80 mass%.
- the oxidizing agent contained in the first liquid may be, for example, an organic peroxide or an azo compound.
- the organic peroxide may be, for example, hydroperoxide, peroxydicarbonate, peroxyester, peroxyketal, dialkyl peroxide, diacyl peroxide, and the like.
- the azo compound may be AIBN (2,2'-azobisisobutyronitrile), V-65 (azobisdimethylvaleronitrile) or the like. These oxidizing agents may be used alone or in combination of two or more.
- the oxidizing agent may have a role as a polymerization initiator, and may be the same as the polymerization initiator used in the curable composition described above.
- hydroperoxide examples include diisopropylbenzene hydroperoxide and cumene hydroperoxide.
- Peroxydicarbonates include di-n-propyl peroxydicarbonate, diisopropyl peroxydicarbonate, bis (4-tert-butylcyclohexyl) peroxydicarbonate, di-2-ethoxymethoxyperoxydicarbonate, di- (2-Ethylhexylperoxy) dicarbonate, dimethoxybutylperoxydicarbonate, di (3-methyl-3methoxybutylperoxy) dicarbonate and the like.
- Peroxyesters include cumyl peroxyneodecanoate, 1,1,3,3-tetramethylbutylperoxyneodecanoate, 1-cyclohexyl-1-methylethylperoxyneodecanoate, t -Hexylperoxyneodecanoate, t-butylperoxypivalate, 1,1,3,3-tetramethylbutylperoxy-2-ethylhexanoate, 2,5-dimethyl-2,5-di ( 2-ethylhexanoylperoxy) hexane, 1-cyclohexyl-1-methylethylperoxy-2-ethylhexanoate, t-hexylperoxy-2-ethylhexanoate, t-butylperoxy-2-ethyl Hexanonate, t-butylperoxyisobutyrate, 1,1-bis (t-butylperoxy) cyclohex
- Peroxyketals include 1,1-bis (t-hexylperoxy) -3,3,5-trimethylcyclohexane, 1,1-bis (t-hexylperoxy) cyclohexane, 1,1- Bis (t-butylperoxy) -3,3,5-trimethylcyclohexane, 1,1-bis (t-butylperoxy) cyclododecane, 2,2-bis (t-butylperoxy) decane, etc. Can be mentioned.
- Dialkyl peroxides include ⁇ , ⁇ ′-bis (t-butylperoxy) diisopropylbenzene, dicumyl peroxide, 2,5-dimethyl-2,5-di (t-butylperoxy) hexane, t- Examples thereof include butyl cumyl peroxide.
- Diacyl peroxides include isobutyl peroxide, 2,4-dichlorobenzoyl peroxide, 3,5,5-trimethylhexanoyl peroxide, octanoyl peroxide, lauroyl peroxide, stearoyl peroxide, succinic peroxide , Benzoylperoxytoluene, benzoyl peroxide and the like.
- the oxidizing agent is preferably a peroxide, more preferably a hydroperoxide, and still more preferably cumene hydroperoxide, from the viewpoint of storage stability.
- the content of the oxidizing agent in the first liquid may be 0.5% by mass or more, 1% by mass or more, or 1.5% by mass or more, and 20% by mass or less, 10% by mass based on the total amount of the first liquid. Or 5% by mass or less.
- the content of the oxidizing agent in the first liquid may be 0.1% by mass or more, 0.25% by mass or more, or 0.5% by mass or more based on the total amount of the first liquid and the second liquid. It may be 10% by mass or less, 5% by mass or less, or 3% by mass or less.
- the reducing agent contained in the second liquid may be, for example, a tertiary amine, a thiourea derivative, a transition metal salt, or the like.
- a tertiary amine include triethylamine, tripropylamine, tributylamine, N, N-dimethylparatoluidine and the like.
- the thiourea derivative include 2-mercaptobenzimidazole, methylthiourea, dibutylthiourea, tetramethylthiourea, ethylenethiourea and the like.
- transition metal salts include cobalt naphthenate, copper naphthenate, and vanadyl acetylacetonate.
- a reducing agent may be used individually by 1 type or in combination of 2 or more types.
- the reducing agent is preferably a thiourea derivative or a transition metal salt from the viewpoint of excellent curing speed.
- the thiourea derivative may be, for example, ethylene thiourea.
- the transition metal salt is preferably vanadyl acetylacetonate.
- the content of the reducing agent in the second liquid may be 0.1% by mass or more, 0.3% by mass or more, or 0.5% by mass or more based on the total amount of the second liquid, and may be 10% by mass or less. It may be less than or equal to 3% or less than 3% by weight.
- the content of the reducing agent in the second liquid may be 0.05% by mass or more, 0.1% by mass or more, or 0.2% by mass or more based on the total amount of the first liquid and the second liquid. It may be 5% by mass or less, 3% by mass or less, or 1% by mass or less.
- At least one of the first liquid and the second liquid is a compound containing a structural unit (structural unit (A)) represented by the above formula (1) (heat storage (meth) acrylic polymer). May further be contained. Since the aspect of the heat storage (meth) acrylic polymer is the same as that described above, the description thereof is omitted.
- the content of the first liquid and the second liquid is from the viewpoint of further enhancing the heat storage effect. Based on the total amount, it is preferably 10% by mass or more, more preferably 20% by mass or more, further preferably 30% by mass or more, and from the viewpoint of handling properties, it is preferably 50% by mass or less, more preferably 40% by mass. It is at most 35% by mass, more preferably at most 35% by mass.
- the first liquid and / or the second liquid can further contain other additives as necessary.
- Other additives include, for example, curing agents, curing accelerators, antioxidants, colorants, fillers, crystal nucleating agents, thermal stabilizers, thermal conductive materials, plasticizers, foaming agents, flame retardants, vibration damping agents, Examples include flame retardant aids (for example, metal oxides).
- flame retardant aids for example, metal oxides.
- Other additives may be used alone or in combination of two or more.
- the aspect of the curing agent may be the same as that of the curing agent used in the curable composition described above.
- the content of other additives may be, for example, 0.1% by mass or more and 30% by mass or less based on the total amount of the first liquid and the second liquid.
- the cured product of the curable composition described above (including the cured product of the mixture of the first liquid and the second liquid of the curable composition set) is suitably used as a heat storage material (the curable composition for a heat storage material).
- the heat storage material includes a cured product of the above-described curable composition (or a mixture of the first liquid and the second liquid of the above-described curable composition set).
- Thermal storage materials can be used in various fields. Thermal storage materials include, for example, air conditioning equipment (improvement of efficiency of air conditioning equipment) in automobiles, buildings, public facilities, underground malls, etc., piping in pipes (heat storage in piping), automobile engines (heat retention around the engine), electronic components (Prevents temperature rise of electronic parts), used for fibers of underwear.
- air conditioning equipment improvement of efficiency of air conditioning equipment
- buildings public facilities, underground malls, etc.
- piping in pipes heat storage in piping
- automobile engines heat retention around the engine
- electronic components Prevents temperature rise of electronic parts
- FIG. 1 is a schematic cross-sectional view illustrating a method for forming a heat storage material (a method for manufacturing an article including a heat storage material) according to an embodiment.
- a method for forming a heat storage material a method for manufacturing an article including a heat storage material
- FIG. 1A an electronic component 1 is prepared as an article on which a heat storage material is provided.
- the electronic component 1 includes, for example, a substrate (for example, a circuit substrate) 2, a semiconductor chip (heat source) 3 provided on the substrate 2, and a plurality of connection portions (for example, solder) 4 that connect the semiconductor chip 3 to the substrate 2. It has.
- the semiconductor chip 3 serves as a heat source.
- the plurality of connection portions 4 are provided between the substrate 2 and the semiconductor chip 3 so as to be separated from each other. In other words, there are gaps separating the plurality of connecting portions 4 between the substrate 2 and the semiconductor chip 3.
- the curable composition 6 is filled between the substrate 2 and the semiconductor chip 3 using, for example, a syringe 5.
- the curable composition 6 may be a curable composition according to one embodiment described above or a mixture of the first liquid and the second liquid in the curable composition set according to one embodiment.
- the curable composition 6 may be in a completely uncured state or may be partially cured.
- the curable composition 6 When the curable composition 6 is in a liquid state at room temperature (for example, 25 ° C.), the curable composition 6 can be filled at room temperature. When curable composition 6 is solid at room temperature, it can be filled after curable composition 6 is heated (for example, 50 ° C. or higher) to be liquid.
- the curable composition 6 is placed in the gap between the substrate 2 and the semiconductor chip 3 as shown in FIG. 2. It arrange
- the heat storage material 7 is formed in the above-described gap existing between the substrate 2 and the semiconductor chip 3 as shown in FIG. 1 (d).
- the curable composition 6 contains a polymerization initiator that generates radicals under anaerobic conditions
- the curable composition 6 is cured by blocking oxygen coming into contact with the curable composition 6. 6 may be cured.
- the curable composition 6 contains a polymerization initiator that generates radicals by heat
- the curable composition 6 is cured by heating the arranged curable composition 6. It may be a method to make it.
- the curable composition 6 contains a polymerization initiator that generates radicals by light
- the curable composition 6 includes light (for example, at least a part of wavelengths of 200 to 400 nm). It may be a method of curing the curable composition 6 by irradiation with light (ultraviolet light). The curing method may be any one of these methods or a combination of two or more.
- the curing method of the curable composition 6 may be a method of proceeding curing by mixing the first liquid and the second liquid.
- FIG. 2 is a schematic cross-sectional view showing another embodiment of a method for forming a heat storage material.
- the electronic component 11 is prepared as an article on which the heat storage material is provided.
- the electronic component 11 includes, for example, a substrate 2 and a semiconductor chip (heat source) 3 provided on the substrate 2.
- the sheet-like curable composition 16 is disposed on the substrate 2 and the semiconductor chip 3 so as to be in thermal contact with each of the substrate 2 and the semiconductor chip 3.
- the curable composition 16 is, for example, a composition that has been B-staged (semi-cured) by the above-described curing method. That is, the method for forming the heat storage material of the present embodiment includes a step of preparing the second curable composition (sheet-like curable composition 16) by converting the first curable composition into a B-stage. Good.
- the curable composition 16 is cured to form the heat storage material 17 on the substrate 2 and the semiconductor chip 3 as shown in FIG.
- the curing method of the curable composition 6 may be one or more of the above-described curing methods.
- the heat storage material is formed so as to cover the entire exposed surface of the heat source.
- the heat storage material may be disposed so as to cover a part of the exposed surface of the heat source.
- FIG. 3 is a schematic cross-sectional view showing another embodiment of an article on which a heat storage material is formed.
- the heat storage material 17 may be disposed so as to contact (partially cover) a part of the exposed surface of the semiconductor chip (heat source) 3, for example.
- the place where the heat storage material 17 is disposed is the side surface portion of the semiconductor chip 3 in FIG. 3, but may be on any surface of the semiconductor chip 3.
- the curable compositions 6 and 16 for forming the heat storage materials 7 and 17 are placed in contact with the semiconductor chip 3 as a heat source in an uncured or semi-cured state.
- the curable compositions 6 and 16 are cured. Therefore, the heat storage materials 7 and 17 are suitably formed following the shape of the semiconductor chip 3 and the like. Therefore, the heat generated in the semiconductor chip 3 as a heat source and the heat conducted from the semiconductor chip 3 to the substrate 2 are also efficiently conducted to the heat storage materials 7 and 17 and are suitably stored in the heat storage materials 7 and 17.
- the curable compositions 6 and 16 are arranged so as to be in direct contact with the semiconductor chip 3 which is a heat source, and the heat storage materials 7 and 17 are formed.
- the curable composition and the heat storage material are
- the curable composition is disposed so as to be in thermal contact with the heat source via a heat conductive member (such as a heat radiating member).
- a heat storage material may be formed.
- FIG. 4 is a schematic cross-sectional view showing another embodiment of an article on which a heat storage material is formed.
- the heat storage material 17 is disposed on the surface of the substrate 2 opposite to the surface on which the semiconductor chip 3 is provided.
- the heat storage material 17 is not in direct contact with the semiconductor chip 3, but is in thermal contact with the semiconductor chip 3 through the substrate 2.
- the place where the heat storage material 17 is disposed may be on any surface of the substrate 2 as long as it is in thermal contact with the semiconductor chip 3. Even in this case, the heat generated by the heat source (semiconductor chip 3) is efficiently conducted to the heat storage material 17 through the substrate 2 and is suitably stored in the heat storage material 17.
- the heat storage material 17 is formed using the B-staged sheet-like curable composition 16 as the curable composition.
- the curable composition may be a liquid curable composition.
- a liquid curable composition is applied to part or all of the exposed surface of the semiconductor chip (heat source) 3 or the surface of the substrate 2 opposite to the surface on which the semiconductor chip 3 is provided. Then, the heat storage material may be formed by curing.
- Example 1 Capsule A containing 20 g of butyl acrylate (BA), 12 g of dicyclopentanyl acrylate (DCPA), 8 g of trimethylolpropane ethoxytriacrylate (TMPEOTA), 0.2 g of lauroyl peroxide, and a heat storage component (manufactured by Outlast Technology Co., Ltd.) , BA410xxP, C37) 60 g was blended to obtain a curable composition. The viscosity of this curable composition at 50 ° C. was measured based on JIS Z 8803 using an E-type viscometer (manufactured by Toki Sangyo Co., Ltd., PE-80L).
- Example 3 Except having changed the composition of the curable composition as shown in Table 1, the viscosity measurement of the curable composition and the production of the heat storage material were carried out in the same manner as in Example 1. The results are shown in Table 1.
- Example 4 11 g of butyl acrylate, 7 g of dicyclopentanyl acrylate, 4 g of trimethylolpropane ethoxytriacrylate, 23 g of polyacryl acrylate A, 55 g of capsule A, and 1.7 g of cumene hydroperoxide (CHP) were mixed to obtain a first liquid. . Also, 11 g of butyl acrylate, 7 g of dicyclopentanyl acrylate, 4 g of trimethylolpropane ethoxytriacrylate, 23 g of polyacryl acrylate A, 55 g of capsule A, and 0.5 g of vanadyl acetylacetonate (VAA) are mixed, Obtained.
- VPA vanadyl acetylacetonate
- the viscosity of the first liquid at 25 ° C. was measured based on JIS Z 8803 using an E-type viscometer (manufactured by Toki Sangyo Co., Ltd., PE-80L). The results are shown in Table 2.
- a 10 cm ⁇ 10 cm ⁇ 1 mm formwork (SUS plate) is placed as a spacer on a polyethylene terephthalate (PET) film, and the first and second liquids are mixed into the mixing nozzle (manufactured by Tomita Engineering Co., Ltd.). ) was mixed while mixing, covered with another PET film, and cured for 24 hours. After curing, the PET film and mold were removed to obtain a sheet-like cured product (heat storage material) having a thickness of 1 mm.
- SUS plate polyethylene terephthalate
- Each heat storage material produced in the examples was measured using a differential scanning calorimeter (manufactured by Perkin Elmer, model number DSC8500), and a melting point and a heat storage amount were calculated. Specifically, the temperature was raised to 100 ° C. at 20 ° C./minute, held at 100 ° C. for 3 minutes, then lowered to ⁇ 30 ° C. at a rate of 10 ° C./minute, 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 the melting point of the heat storage material, and the area was the heat storage amount. The results are shown in Tables 1 and 2. In addition, if the heat storage amount is 30 J / g or more, it can be said that the heat storage amount is excellent.
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Abstract
Description
[1] (メタ)アクリロイル基を有する化合物と、蓄熱性成分を内包したカプセルと、重合開始剤と、を含有する、硬化性組成物。
[2] (メタ)アクリロイル基を有する化合物が、(メタ)アクリロイル基を有するモノマを含む、[1]に記載の硬化性組成物。
[3] (メタ)アクリロイル基を有する化合物が、(メタ)アクリロイル基を有するポリマを含む、[1]又は[2]に記載の硬化性組成物。
[4] 下記式(1)で表される構造単位を含むポリマを更に含有する、[1]~[3]のいずれかに記載の硬化性組成物。
[5] 重合開始剤が嫌気条件下でラジカルを発生させる重合開始剤である、[1]~[4]のいずれかに記載の硬化性組成物。
[6] 重合開始剤が熱によりラジカルを発生させる重合開始剤である、[1]~[4]のいずれかに記載の硬化性組成物。
[7] 重合開始剤が光によりラジカルを発生させる重合開始剤である、[1]~[4]のいずれかに記載の硬化性組成物。
[8] 50℃において液体状である、[1]~[7]のいずれかに記載の硬化性組成物。
[9] 蓄熱材の形成に用いられる、[1]~[8]のいずれかに記載の硬化性組成物。
[10] [1]~[9]のいずれかに記載の硬化性組成物の硬化物を含む、蓄熱材。
[12] (メタ)アクリロイル基を有する化合物が、(メタ)アクリロイル基を有する化合物が、(メタ)アクリロイル基を有するモノマを含む、[11]に記載の硬化性組成物セット。
[13] (メタ)アクリロイル基を有する化合物が、(メタ)アクリロイル基を有するポリマを含む、[11]又は[12]に記載の硬化性組成物セット。
[14] 第一液及び第二液の少なくとも一方が、下記式(1)で表される構造単位を含むポリマを更に含有する、[11]~[13]のいずれかに記載の硬化性組成物セット。
[15] 蓄熱材の形成に用いられる、[11]~[14]のいずれかに記載の硬化性組成物セット。
[16] [11]~[15]のいずれかに記載の硬化性組成物セットにおける、第一液及び第二液の混合物の硬化物を含む、蓄熱材。
[17] 熱源と、熱源と熱的に接触するように設けられた、[10]又は[16]に記載の蓄熱材と、を備える、物品。
・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℃
一実施形態に係る硬化性組成物は、(メタ)アクリロイル基を有する化合物と、蓄熱性成分を内包したカプセル(以下、「蓄熱性カプセル」ともいう。)と、重合開始剤と、を含有する。
一実施形態に係る硬化性組成物セットは、酸化剤を含有する第一液と、還元剤を含有する第二液とを備える硬化性組成物セット(二液型の硬化性組成物セット)である。第一液及び第二液の少なくとも一方は、上述した(メタ)アクリロイル基を有する化合物を含有する。第一液及び第二液の少なくとも一方は、上述した蓄熱性成分を内包したカプセル(蓄熱性カプセル)を含有する。(メタ)アクリロイル基を有する化合物及び蓄熱性カプセルの態様については、硬化性組成物に用いられる態様と同様であるため説明を省略する。
以上説明した硬化性組成物の硬化物(硬化性組成物セットの第一液及び第二液の混合物の硬化物を含む。)は、蓄熱材として好適に用いられる(蓄熱材用硬化性組成物として好適である)。すなわち、一実施形態に係る蓄熱材は、上述した硬化性組成物(又は、上述した硬化性組成物セットの第一液及び第二液の混合物)の硬化物を含んでいる。
次に、蓄熱材を備える物品を得る方法について、蓄熱材を設ける対象として電子部品を例に挙げて説明する。図1は、一実施形態に係る蓄熱材の形成方法(蓄熱材を備える物品の製造方法)を示す模式断面図である。本実施形態に係る形成方法(製造方法)では、まず、図1(a)に示すように、蓄熱材を設ける対象である物品として電子部品1を用意する。電子部品1は、例えば、基板(例えば回路基板)2と、基板2上に設けられた半導体チップ(熱源)3と、半導体チップ3を基板2に接続する複数の接続部(例えば半田)4とを備えている。この電子部品1では、半導体チップ3が熱源となる。複数の接続部4は、互いに離間して基板2と半導体チップ3との間に設けられている。すなわち、基板2と半導体チップ3との間には、複数の接続部4同士を隔てる隙間が存在している。
以下のとおり、公知の溶液重合方法により、実施例1で用いたポリアクリルアクリレートAを合成した。
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、モノマとしてブチルアクリレート65g、ジシクロペンタニルアクリレート25g、及び2-ヒドロキシエチルアクリレート10g、溶媒として2-プロパノール81.8gを混合し、反応器に加え、室温下(25℃)、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0.35g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、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0.05g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、90℃まで昇温し、更に2時間反応させた。その後、溶媒を除去、乾燥し、ポリアクリルアクリレートA中間体を得た。次に、300mLナス型フラスコを反応器とし、ポリアクリルアクリレートA中間体100g、2-イソシアナトエチルメタクリレート7g、及びジラウリン酸ジブチルスズ0.005gを混合し、75℃で1時間撹拌しポリアクリルアクリレートAを得た。ポリアクリルアクリレートAの重量平均分子量(Mw)は、20000であった。
(実施例1)
ブチルアクリレート(BA)20g、ジシクロペンタニルアクリレート(DCPA)12g、トリメチロールプロパンエトキシトリアクリレート(TMPEOTA)8g、過酸化ラウロイル0.2g、及び蓄熱性成分を内包したカプセルA(アウトラストテクノロジー社製、BA410xxP,C37)60gを配合し、硬化性組成物を得た。この硬化性組成物の50℃における粘度を、E型粘度計(東機産業(株)製、PE-80L)を用いて、JIS Z 8803に基づいて測定した。結果を表1に示す。次に、硬化性組成物を10cm×10cm×1mmの型枠(SUS板)中に充填し、SUS板で上蓋をした後、10kPaの加圧下、120℃で3時間硬化させ、厚さ1mmのシート状の蓄熱材を得た。
硬化性組成物の組成を表1に示すとおりに変更した以外は、実施例1と同様の方法で硬化性組成物の粘度測定、及び蓄熱材の作製を実施した。結果を表1に示す。
ブチルアクリレート11g、ジシクロペンタニルアクリレート7g、トリメチロールプロパンエトキシトリアクリレート4g、ポリアクリルアクリレートA 23g、カプセルA 55g、及びクメンハイドロパーオキサイド(CHP)1.7gを混合し、第一液を得た。また、ブチルアクリレート11g、ジシクロペンタニルアクリレート7g、トリメチロールプロパンエトキシトリアクリレート4g、ポリアクリルアクリレートA 23g、カプセルA 55g、及びバナジルアセチルアセトナート(VAA)0.5gを混合し、第二液を得た。第一液の25℃における粘度を、E型粘度計(東機産業(株)製、PE-80L)を用いて、JIS Z 8803に基づいて測定した。結果を表2に示す。
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、2に示す。なお、蓄熱量が30J/g以上であれば、蓄熱量に優れているといえる。
Claims (17)
- (メタ)アクリロイル基を有する化合物と、蓄熱性成分を内包したカプセルと、重合開始剤と、を含有する、硬化性組成物。
- 前記(メタ)アクリロイル基を有する化合物が、(メタ)アクリロイル基を有するモノマを含む、請求項1に記載の硬化性組成物。
- 前記(メタ)アクリロイル基を有する化合物が、(メタ)アクリロイル基を有するポリマを含む、請求項1又は2に記載の硬化性組成物。
- 前記重合開始剤が嫌気条件下でラジカルを発生させる重合開始剤である、請求項1~4のいずれか一項に記載の硬化性組成物。
- 前記重合開始剤が熱によりラジカルを発生させる重合開始剤である、請求項1~4のいずれか一項に記載の硬化性組成物。
- 前記重合開始剤が光によりラジカルを発生させる重合開始剤である、請求項1~4のいずれか一項に記載の硬化性組成物。
- 50℃において液体状である、請求項1~7のいずれか一項に記載の硬化性組成物。
- 蓄熱材の形成に用いられる、請求項1~8のいずれか一項に記載の硬化性組成物。
- 請求項1~9のいずれか一項に記載の硬化性組成物の硬化物を含む、蓄熱材。
- 酸化剤を含有する第一液と、還元剤を含有する第二液とを備え、
前記第一液及び前記第二液の少なくとも一方は、(メタ)アクリロイル基を有する化合物を更に含有し、
前記第一液及び前記第二液の少なくとも一方は、蓄熱性成分を内包したカプセルを更に含有する、硬化性組成物セット。 - 前記(メタ)アクリロイル基を有する化合物が、(メタ)アクリロイル基を有するモノマを含む、請求項11に記載の硬化性組成物セット。
- 前記(メタ)アクリロイル基を有する化合物が、(メタ)アクリロイル基を有するポリマを含む、請求項11又は12に記載の硬化性組成物セット。
- 蓄熱材の形成に用いられる、請求項11~14のいずれか一項に記載の硬化性組成物セット。
- 請求項11~15のいずれか一項に記載の硬化性組成物セットにおける、前記第一液及び前記第二液の混合物の硬化物を含む、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10又は16に記載の蓄熱材と、を備える、物品。
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- 2018-11-14 WO PCT/JP2018/042161 patent/WO2019220664A1/ja not_active Ceased
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- 2018-11-14 JP JP2020518950A patent/JP7276329B2/ja active Active
- 2018-11-14 KR KR1020207031223A patent/KR102579988B1/ko active Active
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Patent Citations (2)
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|---|---|---|---|---|
| JP2007029312A (ja) * | 2005-07-25 | 2007-02-08 | Matsushita Denko Bath & Life Kk | 浴槽 |
| JP2016089065A (ja) * | 2014-11-06 | 2016-05-23 | 共同技研化学株式会社 | 蓄熱粘着シート |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021172698A (ja) * | 2020-04-21 | 2021-11-01 | 昭和電工マテリアルズ株式会社 | 硬化性組成物、蓄熱材、及び物品 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7235048B2 (ja) | 2023-03-08 |
| WO2019220665A1 (ja) | 2019-11-21 |
| JP7255590B2 (ja) | 2023-04-11 |
| JPWO2019220662A1 (ja) | 2021-06-17 |
| JP7276329B2 (ja) | 2023-05-18 |
| CN112135888A (zh) | 2020-12-25 |
| JPWO2019220664A1 (ja) | 2021-07-08 |
| WO2019220662A1 (ja) | 2019-11-21 |
| KR102579988B1 (ko) | 2023-09-18 |
| JPWO2019220665A1 (ja) | 2021-06-17 |
| KR20210010446A (ko) | 2021-01-27 |
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