WO2022131318A1 - 接着性粒子、接着剤及び調光積層体 - Google Patents
接着性粒子、接着剤及び調光積層体 Download PDFInfo
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- WO2022131318A1 WO2022131318A1 PCT/JP2021/046439 JP2021046439W WO2022131318A1 WO 2022131318 A1 WO2022131318 A1 WO 2022131318A1 JP 2021046439 W JP2021046439 W JP 2021046439W WO 2022131318 A1 WO2022131318 A1 WO 2022131318A1
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- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- JOBBTVPTPXRUBP-UHFFFAOYSA-N [3-(3-sulfanylpropanoyloxy)-2,2-bis(3-sulfanylpropanoyloxymethyl)propyl] 3-sulfanylpropanoate Chemical compound SCCC(=O)OCC(COC(=O)CCS)(COC(=O)CCS)COC(=O)CCS JOBBTVPTPXRUBP-UHFFFAOYSA-N 0.000 description 1
- MORJXSSLQYWCHC-UHFFFAOYSA-N [4-(hydroxymethyl)-2-(3-methylphenyl)-1h-imidazol-5-yl]methanol Chemical compound CC1=CC=CC(C=2NC(CO)=C(CO)N=2)=C1 MORJXSSLQYWCHC-UHFFFAOYSA-N 0.000 description 1
- AATODONPOVNXKH-UHFFFAOYSA-N [4-(hydroxymethyl)-2-(4-methylphenyl)-1h-imidazol-5-yl]methanol Chemical compound C1=CC(C)=CC=C1C1=NC(CO)=C(CO)N1 AATODONPOVNXKH-UHFFFAOYSA-N 0.000 description 1
- UUQQGGWZVKUCBD-UHFFFAOYSA-N [4-(hydroxymethyl)-2-phenyl-1h-imidazol-5-yl]methanol Chemical compound N1C(CO)=C(CO)N=C1C1=CC=CC=C1 UUQQGGWZVKUCBD-UHFFFAOYSA-N 0.000 description 1
- GXDVEXJTVGRLNW-UHFFFAOYSA-N [Cr].[Cu] Chemical compound [Cr].[Cu] GXDVEXJTVGRLNW-UHFFFAOYSA-N 0.000 description 1
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- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
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- 239000011149 active material Substances 0.000 description 1
- ORILYTVJVMAKLC-UHFFFAOYSA-N adamantane Chemical group C1C(C2)CC3CC1CC2C3 ORILYTVJVMAKLC-UHFFFAOYSA-N 0.000 description 1
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- IBVAQQYNSHJXBV-UHFFFAOYSA-N adipic acid dihydrazide Chemical compound NNC(=O)CCCCC(=O)NN IBVAQQYNSHJXBV-UHFFFAOYSA-N 0.000 description 1
- 125000003342 alkenyl group Chemical group 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 125000004202 aminomethyl group Chemical group [H]N([H])C([H])([H])* 0.000 description 1
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 1
- 239000012935 ammoniumperoxodisulfate Substances 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 125000002490 anilino group Chemical group [H]N(*)C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
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- 239000000981 basic dye Substances 0.000 description 1
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- 235000010233 benzoic acid Nutrition 0.000 description 1
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- 239000005388 borosilicate glass Substances 0.000 description 1
- 239000004067 bulking agent Substances 0.000 description 1
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- IGARGHRYKHJQSM-UHFFFAOYSA-N cyclohexylbenzene Chemical compound C1CCCCC1C1=CC=CC=C1 IGARGHRYKHJQSM-UHFFFAOYSA-N 0.000 description 1
- YQLZOAVZWJBZSY-UHFFFAOYSA-N decane-1,10-diamine Chemical compound NCCCCCCCCCCN YQLZOAVZWJBZSY-UHFFFAOYSA-N 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 229920006241 epoxy vinyl ester resin Polymers 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- IIEWJVIFRVWJOD-UHFFFAOYSA-N ethylcyclohexane Chemical compound CCC1CCCCC1 IIEWJVIFRVWJOD-UHFFFAOYSA-N 0.000 description 1
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 description 1
- 125000003916 ethylene diamine group Chemical group 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000989 food dye Substances 0.000 description 1
- IVJISJACKSSFGE-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine Chemical compound O=C.NC1=NC(N)=NC(N)=N1 IVJISJACKSSFGE-UHFFFAOYSA-N 0.000 description 1
- ANSXAPJVJOKRDJ-UHFFFAOYSA-N furo[3,4-f][2]benzofuran-1,3,5,7-tetrone Chemical compound C1=C2C(=O)OC(=O)C2=CC2=C1C(=O)OC2=O ANSXAPJVJOKRDJ-UHFFFAOYSA-N 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- VANNPISTIUFMLH-UHFFFAOYSA-N glutaric anhydride Chemical compound O=C1CCCC(=O)O1 VANNPISTIUFMLH-UHFFFAOYSA-N 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- 229940015043 glyoxal Drugs 0.000 description 1
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- 238000013007 heat curing Methods 0.000 description 1
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- XQSBLCWFZRTIEO-UHFFFAOYSA-N hexadecan-1-amine;hydrobromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[NH3+] XQSBLCWFZRTIEO-UHFFFAOYSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004029 hydroxymethyl group Chemical group [H]OC([H])([H])* 0.000 description 1
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- COHYTHOBJLSHDF-UHFFFAOYSA-N indigo powder Natural products N1C2=CC=CC=C2C(=O)C1=C1C(=O)C2=CC=CC=C2N1 COHYTHOBJLSHDF-UHFFFAOYSA-N 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000006233 lamp black Substances 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
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- LVWZTYCIRDMTEY-UHFFFAOYSA-N metamizole Chemical compound O=C1C(N(CS(O)(=O)=O)C)=C(C)N(C)N1C1=CC=CC=C1 LVWZTYCIRDMTEY-UHFFFAOYSA-N 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- NTNWKDHZTDQSST-UHFFFAOYSA-N naphthalene-1,2-diamine Chemical compound C1=CC=CC2=C(N)C(N)=CC=C21 NTNWKDHZTDQSST-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
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- DGBWPZSGHAXYGK-UHFFFAOYSA-N perinone Chemical compound C12=NC3=CC=CC=C3N2C(=O)C2=CC=C3C4=C2C1=CC=C4C(=O)N1C2=CC=CC=C2N=C13 DGBWPZSGHAXYGK-UHFFFAOYSA-N 0.000 description 1
- 229950000688 phenothiazine Drugs 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
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- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
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- WGYKZJWCGVVSQN-UHFFFAOYSA-N propylamine Chemical group CCCN WGYKZJWCGVVSQN-UHFFFAOYSA-N 0.000 description 1
- MCSKRVKAXABJLX-UHFFFAOYSA-N pyrazolo[3,4-d]triazole Chemical compound N1=NN=C2N=NC=C21 MCSKRVKAXABJLX-UHFFFAOYSA-N 0.000 description 1
- IZMJMCDDWKSTTK-UHFFFAOYSA-N quinoline yellow Chemical compound C1=CC=CC2=NC(C3C(C4=CC=CC=C4C3=O)=O)=CC=C21 IZMJMCDDWKSTTK-UHFFFAOYSA-N 0.000 description 1
- 239000007870 radical polymerization initiator Substances 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000005361 soda-lime glass Substances 0.000 description 1
- XFTALRAZSCGSKN-UHFFFAOYSA-M sodium;4-ethenylbenzenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C1=CC=C(C=C)C=C1 XFTALRAZSCGSKN-UHFFFAOYSA-M 0.000 description 1
- 238000000992 sputter etching Methods 0.000 description 1
- 150000003431 steroids Chemical class 0.000 description 1
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- 229920006132 styrene block copolymer Polymers 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 229940014800 succinic anhydride Drugs 0.000 description 1
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- 239000000454 talc Substances 0.000 description 1
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- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 125000005425 toluyl group Chemical group 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
- PJANXHGTPQOBST-VAWYXSNFSA-N trans-stilbene Chemical compound C=1C=CC=CC=1/C=C/C1=CC=CC=C1 PJANXHGTPQOBST-VAWYXSNFSA-N 0.000 description 1
- 239000001003 triarylmethane dye Substances 0.000 description 1
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- SRPWOOOHEPICQU-UHFFFAOYSA-N trimellitic anhydride Chemical compound OC(=O)C1=CC=C2C(=O)OC(=O)C2=C1 SRPWOOOHEPICQU-UHFFFAOYSA-N 0.000 description 1
- AAAQKTZKLRYKHR-UHFFFAOYSA-N triphenylmethane Chemical compound C1=CC=CC=C1C(C=1C=CC=CC=1)C1=CC=CC=C1 AAAQKTZKLRYKHR-UHFFFAOYSA-N 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
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- 230000000007 visual effect Effects 0.000 description 1
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- 239000011787 zinc oxide Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/38—Layered products comprising a layer of synthetic resin comprising epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J201/00—Adhesives based on unspecified macromolecular compounds
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
Definitions
- the present invention relates to adhesive particles.
- the present invention also relates to an adhesive and a dimming laminate using the adhesive particles.
- Dimming materials such as dimming glass and dimming film may be used for display devices such as liquid crystal displays and in-vehicle displays.
- the dimming material has a property that the light transmittance changes depending on the presence or absence of application of an electric field, and the amount of incident light can be adjusted.
- the liquid crystal display element is configured by arranging a liquid crystal between two glass or film substrates.
- an adhesive is used to bond two glass or film substrates together.
- adheresive particles may be contained in the adhesive.
- Patent Document 1 includes a spherical core particle having a hydrophobic substituent introduced on its surface and a thermosetting resin layer that covers the surface of the core particle via the hydrophobic substituent.
- Sexual resin coated particles are disclosed.
- the thermosetting resin-coated particles can be used in a liquid crystal display device.
- the thermosetting resin layer contains a radically polymerizable acrylate-based prepolymer having a softening point of 40 ° C. to 150 ° C. and a radical polymerization initiator that generates radicals by heating to a temperature of 60 ° C. to 150 ° C.
- Patent Document 1 a method (hybridization method) is used in which core particles and fine particles covering the surface of the core particles are made to collide with each other in a high-speed air flow, and a resin layer is formed on the surface of the core particles by the heat thereof. ..
- Patent Document 2 discloses an adhesive spacer for a liquid crystal display device including seed particles and an adhesive layer derived from adhesive fine particles.
- the adhesive layer covers the surface of the seed particles.
- the adhesive fine particles are polymer particles containing 0.1% by weight or more and less than 50% by weight of constituent components derived from a specific polymerizable monomer having a long-chain alkyl group.
- the particles formed by the hybridization method as in Patent Document 1 have a problem that the adhesion between the core particles and the resin layer is insufficient and the resin layer is easily peeled off from the core particles. Further, when the particles are heated, dripping may occur due to melting of the thermosetting resin on the surface of the particles, and as a result, the adhesiveness may be lowered.
- the adhesive fine particles may aggregate with each other.
- the nozzle may be clogged or the adhesive spacer may be damaged due to collision with the substrate.
- thermosetting resin portion and a plurality of inorganic oxide particles are contained, and the inorganic oxide particles are dispersed in the thermosetting resin portion, or the thermosetting particles are heat-cured.
- Adhesive particles in which the inorganic oxide particles are attached to the surface of the sex resin portion are provided.
- the inorganic oxide particles are silica.
- thermosetting resin of the thermosetting resin portion is an epoxy resin.
- the adhesive particles have a base particle inside, and the base particle contains a thermoplastic resin.
- the substrate particles contain a pigment or dye.
- an adhesive containing the above-mentioned adhesive particles and a binder is provided.
- the dimming layer comprises a first substrate, a second substrate, and a dimming layer arranged between the first substrate and the second substrate.
- a dimming laminate is provided in which the material of the above contains the adhesive particles described above.
- the adhesive particles according to the present invention include a thermosetting resin portion and a plurality of inorganic oxide particles, and the inorganic oxide particles are dispersed in the thermocurable resin portion, or the thermal curing is performed.
- the inorganic oxide particles are attached to the surface of the sex resin portion. Since the adhesive particles according to the present invention have the above-mentioned structure, the adhesiveness can be enhanced, aggregation can be effectively suppressed, and dripping during heating can be suppressed. can.
- FIG. 1 is a cross-sectional view showing adhesive particles according to the first embodiment of the present invention.
- FIG. 2 is a cross-sectional view showing adhesive particles according to a second embodiment of the present invention.
- FIG. 3 is a cross-sectional view showing the adhesive particles according to the third embodiment of the present invention.
- FIG. 4 is a cross-sectional view showing an example of a PDLC type dimming laminate using adhesive particles according to the first embodiment of the present invention.
- FIG. 5 is a cross-sectional view showing an example of an SPD-type dimming laminate using adhesive particles according to the first embodiment of the present invention.
- the adhesive particles according to the present invention include a thermosetting resin portion and a plurality of inorganic oxide particles.
- the inorganic oxide particles are dispersed in the thermosetting resin portion, or the inorganic oxide particles are adhered to the surface of the thermosetting resin portion.
- the inorganic oxide particles may be dispersed in the thermosetting resin portion, or the inorganic oxide particles may be adhered to the surface of the thermosetting resin portion. From the viewpoint of further improving the adhesiveness and more effectively preventing damage due to collision with the substrate during coating, it is preferable that the inorganic oxide particles are dispersed in the thermosetting resin portion.
- the adhesive particles according to the present invention have the above-mentioned structure, aggregation can be effectively suppressed. As a result, it is possible to improve the ejection property when applying to a substrate or the like with a dispenser or the like. Specifically, it is possible to prevent nozzle clogging during coating. In addition, it is possible to prevent the particles from being damaged due to collision with the substrate.
- the adhesive particles according to the present invention have the above-mentioned structure, the adhesiveness can be enhanced.
- the adhesive particles according to the present invention can be bonded by thermally curing the thermosetting resin portion.
- the adhesive particles according to the present invention have the above-mentioned structure, it is possible to suppress dripping due to melting of the thermosetting resin portion during heating, and it is possible to maintain high adhesiveness. can. In addition, contamination due to dripping can be prevented.
- the adhesive particles can be suitably used as an adhesive. Further, the adhesive particles can be used for a light control material, a light control layer and a light control laminate. The adhesive particles may be used as a spacer for a light control glass or a spacer for a light control film. The adhesive particles may be adhesive particles for a dimming laminate.
- the shape of the adhesive particles is not particularly limited.
- the shape of the adhesive particles may be spherical, non-spherical, flat or the like.
- the spherical shape is not limited to a true spherical shape, but also includes a substantially spherical shape, and includes, for example, a shape having an aspect ratio (major diameter / minor diameter) of 1.5 or less.
- FIG. 1 is a cross-sectional view showing adhesive particles according to the first embodiment of the present invention.
- the adhesive particle 1 shown in FIG. 1 includes a particle body 2 (thermosetting resin portion) and a plurality of inorganic oxide particles 3.
- the inorganic oxide particles 3 are dispersed in the particle body 2 (thermosetting resin portion).
- the particle body 2 (thermosetting resin portion) is formed of a thermosetting resin and contains a thermosetting resin.
- FIG. 2 is a cross-sectional view showing adhesive particles according to a second embodiment of the present invention.
- the adhesive particles 11 shown in FIG. 2 include base particles 14, a covering portion 12, and a plurality of inorganic oxide particles 13.
- the inorganic oxide particles 13 are dispersed in the covering portion 12.
- the adhesive particles 11 have the base particles 14 inside.
- the covering portion 12 is in contact with the surface of the base particles 14 and covers the surface of the base particles 14.
- the adhesive particles 11 are coated particles in which the surface of the base particles 14 is coated with the coated portion 12.
- the covering portion 12 is a single-layer covering layer.
- the covering portion 12 is a thermosetting resin portion.
- the thermosetting resin portion is formed of a thermosetting resin and contains a thermosetting resin.
- the base particles 14 are mainly different between the adhesive particles 1 shown in FIG. 1 and the adhesive particles 11 shown in FIG. That is, the adhesive particles 1 do not form the base particles, whereas the adhesive particles 11 form the base particles 14.
- FIG. 3 is a cross-sectional view showing adhesive particles according to a third embodiment of the present invention.
- the adhesive particles 21 shown in FIG. 3 include base particles 24, a covering portion 22, and a plurality of inorganic oxide particles 23.
- the inorganic oxide particles 23 are attached to the surface of the covering portion 22.
- the adhesive particles 21 have the base particles 24.
- the covering portion 22 is in contact with the surface of the base particles 24 and covers the surface of the base particles 24.
- the adhesive particles 21 are coated particles in which the surface of the base particles 24 is coated with the covering portion 22.
- the covering portion 22 is formed of a plurality of particles.
- the covering portion 22 includes a thermosetting resin portion.
- the particles forming the covering portion 22 contain a thermosetting resin.
- the coated portion 12 and the coated portion 22 are mainly different between the adhesive particles 11 and the adhesive particles 21. That is, in the adhesive particles 11, the coating portion is a single-layer coating layer, whereas in the adhesive particles 21, the coating portion is formed by a plurality of particles. In the adhesive particles 1 and the adhesive particles 11, the inorganic oxide particles are dispersed in the heat-curable resin, whereas in the adhesive particles 21, the inorganic oxidation is performed on the surface of the heat-curable resin portion. Particles are attached.
- the adhesive particles 11 and the adhesive particles 21 have the base particles 14 and the base particles 24, they are excellent in gap controllability. Therefore, the adhesive particles 11 and the adhesive particles 21 can be suitably used as a spacer for a dimming laminate or the like.
- the adhesive particles 11 and the adhesive particles 21 can be suitably used as a spacer for light control glass and a spacer for light control film.
- the gap between the substrates can be controlled with high accuracy, and the uniformity of the thickness between the substrates can be improved. Further, by suppressing the peeling of the conductive film, the dimming performance of the dimming laminate can be maintained.
- the surface area (coverage) covered by the covering portion is preferably 20% or more, more preferably 50% or more, still more preferably 80% or more, and particularly preferably 85. % Or more.
- the upper limit of the coverage is not particularly limited.
- the coverage may be 100% or less, or 99% or less.
- the adhesiveness can be further improved.
- the gap can be controlled with higher accuracy.
- the surface area (coverage) covered by the coating is the basis of the surface area covered by the coating when the adhesive particles are observed with an electron microscope or an optical microscope. It is obtained by calculating the percentage of the projected area of the material particles.
- the thickness of the coating portion is preferably 0.1 ⁇ m or more, more preferably 0.5 ⁇ m or more, still more preferably 1 ⁇ m or more, preferably 10 ⁇ m or less, more preferably 7 ⁇ m or less. , More preferably 5 ⁇ m or less.
- the thickness of the covering portion means the thickness of the entire covering portion.
- the thickness of the covering portion can be calculated from the difference between the particle size of the base particle and the particle size of the particle.
- the CV value of the particle size of the adhesive particles is preferably 10% or less, more preferably 7% or less.
- the upper limit of the CV value of the particle size of the adhesive particles is not particularly limited.
- the CV value of the particle size of the adhesive particles may be 30% or less.
- the CV value (coefficient of variation) of the particle size of the adhesive particles can be measured as follows.
- CV value (%) ( ⁇ / Dn) ⁇ 100 ⁇ : Standard deviation of particle size of the adhesive particles Dn: Mean value of particle size of the adhesive particles
- the compressive elastic modulus (10% K value) of the adhesive particles when compressed at 25 ° C. is preferably 10 N / mm 2 or more, more preferably 1000 N / mm 2 or more, and preferably 10000 N / mm 2 . Below, it is more preferably 7,000 N / mm 2 or less.
- the 10% K value is equal to or higher than the lower limit and lower than the upper limit, the gap can be controlled with high accuracy.
- the compressive elastic modulus (30% K value) of the adhesive particles when compressed at 25 ° C. at 25 ° C. is preferably 50 N / mm 2 or more, more preferably 2000 N / mm 2 or more, and preferably 20000 N / mm 2 . Below, it is more preferably 10000 N / mm 2 or less.
- 30% K value is equal to or higher than the lower limit and lower than the upper limit, the gap can be controlled with high accuracy.
- the compressive elastic modulus (10% K value and 30% K value) of the adhesive particles can be measured as follows.
- the compressive elastic modulus (10% K value and 30% K value) can be obtained by the following formula.
- the compressive elastic modulus (10% K value and 30% K value) of the adhesive particles is the compressive elastic modulus (10% K value and 30% K value) of 50 arbitrarily selected adhesive particles. It is preferable to calculate by arithmetically averaging.
- the compressive elastic modulus universally and quantitatively represents the hardness of the adhesive particles. By using the compressive modulus, the hardness of the adhesive particles can be quantitatively and uniquely expressed.
- the tensile yield stress of the adhesive particles is preferably 0.03 MPa or more, more preferably 0.05 MPa or more, still more preferably 0.10 MPa or more. Is.
- the upper limit of the tensile yield stress of the adhesive particles is not particularly limited. In the following adhesiveness test A, the tensile yield stress of the adhesive particles may be 0.03 MPa or less, or may be less than 0.03 MPa.
- the tensile yield stress of the adhesive particles is preferably 0.05 MPa or more, more preferably 0.07 MPa or more, still more preferably 0. It is 12 MPa or more.
- the upper limit of the tensile yield stress of the adhesive particles is not particularly limited. In the following adhesiveness test B, the tensile yield stress of the adhesive particles may be 0.05 MPa or less or less than 0.05 MPa.
- Adhesion test A A glass substrate is prepared as the first substrate and the second substrate. Adhesive particles are sprayed on the surface of the first substrate so as to be 10 particles / mm 2 . Then, according to the method of JIS K6850, the test piece (test sample) is heated at a pressure of 5 kgf / cm 2 at 100 ° C. for 60 minutes to adhere the adhesive particles to the first and second substrates. To make. Using a Tensilon universal material tester, the adhesive strength of the test piece obtained at a tensile speed of 20 mm / min and a load cell rating of 1000 N is measured at 23 ° C. This measured value is taken as the tensile yield stress of the adhesive particles.
- Adhesion test B A glass substrate is prepared as the first substrate and the second substrate. Adhesive particles are sprayed on the surface of the first substrate so as to be 10 particles / mm 2 . Then, according to the method of JIS K 6850, the adhesive particles were heated on the first and second substrates by heating at 130 ° C. for 60 minutes at a pressure of 5 kgf / cm 2 , and the test piece (test sample) was adhered to the first and second substrates. To make. Using a Tensilon universal material tester, the adhesive strength of the test piece obtained at a tensile speed of 20 mm / min and a load cell rating of 1000 N is measured at 23 ° C. This measured value is taken as the tensile yield stress of the adhesive particles.
- glass substrate As the glass substrate, "S-7213” manufactured by Matsunami Glass Ind. Co., Ltd. or the like is used. As the Tensilon universal material tester, "RTI-1310” manufactured by A & D Co., Ltd. or the like is used.
- (meth) acrylate means one or both of “acrylate” and “methacrylate”
- (meth) acrylic means one or both of “acrylic” and “methacrylic”. means.
- the particle body of the adhesive particles may include a thermosetting resin portion, or the particle body of the adhesive particles may be a thermosetting resin portion, and the base particles may be composed of the base particles.
- the coating portion in contact with the surface may include a thermosetting resin portion, and the coating portion may be a thermosetting resin portion.
- the particle body of the adhesive particles is a thermosetting resin portion.
- the coating portion in contact with the surface of the base material particles is a thermosetting resin portion.
- the thermosetting resin portion may form a particle body of the adhesive particles, or may form a coating portion that is in contact with the surface of the substrate particles.
- the thermosetting resin portion is formed of a thermosetting resin and contains a thermosetting resin.
- the thermosetting resin portion may contain components other than the thermosetting resin as long as the thermosetting property is not impaired.
- the component other than the thermosetting resin may be a resin.
- the covering portion may be formed by one layer.
- the covering portion may be formed of a plurality of layers. That is, the covering portion may have a laminated structure of two or more layers.
- the outermost layer contains a thermosetting resin portion.
- the covering portion may be formed of a plurality of particles. From the viewpoint of suppressing the peeling of the coating portion from the surface of the base particles, the coating portion is preferably a single-layer coating layer.
- thermosetting resin examples include epoxy resin, vinyl ester resin, and unsaturated polyester resin. Only one type of the thermosetting resin may be used, or two or more types may be used in combination.
- the epoxy resin examples include bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol S type epoxy resin, phenol novolac type epoxy resin, biphenyl type epoxy resin, biphenyl novolac type epoxy resin, biphenol type epoxy resin, and naphthalene type epoxy resin. , Fluolene type epoxy resin, phenol aralkyl type epoxy resin, naphthol aralkyl type epoxy resin, dicyclopentadiene type epoxy resin, anthracene type epoxy resin, adamantan skeleton epoxy resin, tricyclodecane skeleton epoxy resin, and triazine nucleus. Examples thereof include an epoxy resin having a skeleton.
- vinyl ester resin examples include bis-based vinyl ester resin and novolak-based vinyl ester resin.
- Examples of the unsaturated polyester resin include resins obtained by polycondensation of ⁇ , ⁇ -unsaturated dicarboxylic acid or its acid anhydride and glycols.
- thermosetting resin preferably contains an epoxy resin. From the viewpoint of further enhancing the adhesiveness, the thermosetting resin is preferably an epoxy resin.
- the epoxy resin is preferably a polyfunctional epoxy resin.
- the polyfunctional epoxy resin include bifunctional epoxy resins such as bisphenol A type epoxy resin and bisphenol F type epoxy resin, trifunctional epoxy resins such as triazine type epoxy resin, and glycidylamine type epoxy resin, and tetrakisphenol ethane. Examples thereof include a type epoxy resin and a tetrafunctional epoxy resin such as a glycidylamine type epoxy resin. Only one type of the epoxy resin may be used, or two or more types may be used in combination.
- the curing agent heat-cures the epoxy resin.
- the above-mentioned curing agent is not particularly limited.
- the curing agent include thiol curing agents such as imidazole curing agents, amine curing agents, phenol curing agents, polythiol curing agents, and acid anhydride curing agents. Only one kind of the above-mentioned curing agent may be used, or two or more kinds may be used in combination. From the viewpoint of easily controlling the compression characteristics of the adhesive particles within a suitable range, the curing agent is preferably an amine curing agent.
- the above imidazole curing agent is not particularly limited.
- Examples of the imidazole curing agent include 2-methylimidazole, 2-ethyl-4-methylimidazole, 1-cyanoethyl-2-phenylimidazole, 1-cyanoethyl-2-phenylimidazolium trimellitate, and 2,4-diamino-6.
- the above thiol curing agent is not particularly limited.
- examples of the thiol curing agent include trimethylolpropane tris-3-mercaptopropionate, pentaerythritol tetrakis-3-mercaptopropionate, and dipentaerythritol hexa-3-mercaptopropionate.
- the above amine curing agent is not particularly limited.
- examples of the amine curing agent include ethylenediamine, hexamethylenediamine, octamethylenediamine, decamethylenediamine, 2,5 (2,6) -bis (aminomethyl) bicyclo [2.2.1] heptane, and 3,9-bis.
- the amine curing agents include ethylenediamine, hexamethylenediamine, octamethylenediamine, 2,5 (2,6) -bis (aminomethyl) bicyclo [2.2.1] heptane, metaphenylenediamine, dianodiphenylmethane, and diaminodiphenyl. It is preferably sulfone, phenylenediamine, or 2,2-bis [4- (4-aminophenoxy) phenyl] propane.
- the amine curing agent is ethylenediamine, 2,5 (2,6) -bis (aminomethyl) bicyclo [2.2.1]. More preferably, it is heptane, diaminodiphenylmethane, phenylenediamine, or 2,2-bis [4- (4-aminophenoxy) phenyl] propane.
- the acid anhydride curing agent is not particularly limited, and any acid anhydride used as a curing agent for a thermosetting compound such as an epoxy compound can be widely used.
- the acid anhydride curing agent include phthalic anhydride, tetrahydrophthalic anhydride, trialkyltetrahydrochloride phthalic acid, hexahydrohydride phthalic acid, methylhexahydrohydride phthalic acid, methyltetrahydrohydride phthalic acid, and methylbutenyltetrahydrochloride phthalic acid.
- Anhydride of phthalic acid derivative maleic anhydride, nadic acid anhydride, methylnadic acid anhydride, glutaric anhydride, succinic anhydride, glycerinbis anhydrous trimellitic acid monoacetate, ethylene glycol bis anhydrous trimellitic acid, etc.
- Acid anhydride curing agent trifunctional acid anhydride curing agent such as trimellitic anhydride, and pyromellitic anhydride, benzophenonetetracarboxylic acid anhydride, methylcyclohexenetetracarboxylic acid anhydride, polyazelineic acid anhydride, etc. Examples thereof include an acid anhydride curing agent having four or more functions.
- the content of the thermosetting resin in 100% by weight of the thermosetting resin portion is preferably 50% by weight or more, more preferably 70% by weight or more, still more preferably 90% by weight or more, and preferably 99% by weight. It is 9% by weight or less, more preferably 99.7% by weight or less, still more preferably 99.6% by weight or less.
- the content of the thermosetting resin is not less than the above lower limit and not more than the above upper limit, the adhesiveness can be further enhanced and the dripping during heating can be suppressed more effectively.
- the content of the thermosetting resin is preferably 70% by weight or more, more preferably 90% by weight or more, and most preferably 100% by weight in the total 100% by weight of all the resin components contained in the thermosetting resin portion. % (Total amount).
- the content of the thermosetting resin is at least the above lower limit, the adhesiveness can be further enhanced and the dripping during heating can be suppressed more effectively.
- the content of the thermosetting resin in 100% by weight of the adhesive particles is preferably 2% by weight or more, more preferably 5% by weight or more, still more preferably 10% by weight or more, and particularly preferably 25% by weight or more. Yes, preferably 99.5% by weight or less, more preferably 99% by weight or less, still more preferably 98% by weight or less.
- the content of the thermosetting resin is not less than the above lower limit and not more than the above upper limit, the adhesiveness can be further enhanced and the dripping during heating can be suppressed more effectively.
- the content of the thermosetting resin in 100% by weight of the adhesive particles is preferably 70% by weight or more, more preferably 75% by weight or more, still more preferably. It is 80% by weight or more, preferably 99.5% by weight or less, more preferably 99% by weight or less, and further preferably 98% by weight or less.
- the content of the thermosetting resin is not less than the above lower limit and not more than the above upper limit, the adhesiveness can be further enhanced and the dripping during heating can be suppressed more effectively.
- the content of the thermosetting resin in 100% by weight of the adhesive particles is preferably 2% by weight or more, more preferably 5% by weight or more, still more preferably 10% by weight. % Or more, particularly preferably 25% by weight or more, preferably 70% by weight or less, more preferably 60% by weight or less, still more preferably 50% by weight or less.
- the content of the thermosetting resin is not less than the above lower limit and not more than the above upper limit, the adhesiveness can be further enhanced and the dripping during heating can be suppressed more effectively.
- inorganic oxide particles examples include silica, titania (titanium oxide), zinc oxide, alumina, glass, talc, kaolin, bentonite, and zirconium.
- the inorganic oxide particles preferably contain silica or titania, and may contain silica. More preferred. From the viewpoint of further enhancing the adhesiveness and increasing the strength of the adhesive particles, the inorganic oxide particles are preferably silica or titania, and more preferably silica.
- silica examples include natural silica and synthetic silica.
- synthetic silica examples include hydrophilic silica and hydrophobic silica. Since the quality is stable, the silica is preferably synthetic silica, and more preferably synthetic silica produced by the vapor phase method.
- the content of the inorganic oxide particles in 100% by weight of the adhesive particles is preferably 0.25% by weight or more, more preferably 0.5% by weight or more, still more preferably 1% by weight or more, and particularly preferably 1%. It is 9.9% by weight or more, preferably 20% by weight or less, more preferably 15% by weight or less, still more preferably 10% by weight or less.
- the adhesiveness can be further enhanced and aggregation can be suppressed more effectively.
- the content of the inorganic oxide particles is preferably 0.3 parts by weight or more, more preferably 0.6 parts by weight or more, still more preferably 1 part by weight or more, particularly, with respect to 100 parts by weight of the thermosetting resin. It is preferably 2.5 parts by weight or more, and most preferably 2.9 parts by weight or more. With respect to 100 parts by weight of the thermosetting resin, the content of the inorganic oxide particles is preferably 20 parts by weight or less, more preferably 15 parts by weight or less, still more preferably 10 parts by weight or less, and particularly preferably 7. It is 6 parts by weight or less. When the content of the inorganic oxide particles is not less than the above lower limit and not more than the above upper limit, the adhesiveness can be further enhanced and aggregation can be suppressed more effectively.
- the content of the inorganic oxide particles in 100% by weight of the adhesive particles is preferably 0.4% by weight or more, more preferably 0.9% by weight or more. It is more preferably 1.9% by weight or more, preferably 19.5% by weight or less, more preferably 14.5% by weight or less, still more preferably 9.5% by weight or less.
- the adhesiveness can be further enhanced and aggregation can be suppressed more effectively.
- the content of the inorganic oxide particles is preferably 0.5 parts by weight or more, more preferably 1 part by weight, with respect to 100 parts by weight of the thermosetting resin.
- the above is more preferably 2 parts by weight or more, and particularly preferably 2.5 parts by weight or more.
- the content of the inorganic oxide particles is preferably 20 parts by weight or less, more preferably 15 parts by weight or less, based on 100 parts by weight of the thermosetting resin. More preferably, it is 10 parts by weight or less.
- the content of the inorganic oxide particles in 100% by weight of the adhesive particles is preferably 0.25% by weight or more, more preferably 0.5% by weight or more, still more preferable. Is 1.0% by weight or more, particularly preferably 1.9% by weight or more.
- the content of the inorganic oxide particles in 100% by weight of the adhesive particles is preferably 12% by weight or less, more preferably 10% by weight or less, still more preferably 6% by weight. It is as follows. When the content of the inorganic oxide particles is not less than the above lower limit and not more than the above upper limit, the adhesiveness can be further enhanced and aggregation can be suppressed more effectively.
- the content of the inorganic oxide particles is preferably 0.3 parts by weight or more, more preferably 0.6 parts by weight, based on 100 parts by weight of the thermosetting resin.
- the above is more preferably 1.0 part by weight or more, and particularly preferably 2.5 parts by weight or more.
- the content of the inorganic oxide particles is preferably 15 parts by weight or less, more preferably 10 parts by weight or less, still more preferably, with respect to 100 parts by weight of the thermosetting resin. Is less than 7.0 parts by weight.
- the adhesive particles may or may not have base particles inside the adhesive particles.
- the adhesive particles having the base particles inside the adhesive particles are, for example, the adhesive particles 11 or the adhesive particles 21, in which a part of the surface of the base particles is a coating layer or a plurality of particles.
- the adhesive particles having no substrate particles inside the adhesive particles mean adhesive particles having no covering portion, such as the adhesive particles 1.
- the base particles contain a thermoplastic resin. Is preferable.
- thermoplastic resin examples include polyolefin resins such as polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyvinylidene chloride and polyisobutylene, acrylic resins such as polymethylmethacrylate and polymethylacrylate, polyvinylacetal resin, polyester resin and ethylene-acetic acid.
- examples thereof include vinyl copolymer resin, ethylene-acrylic acid copolymer resin, polyurethane resin and polyvinyl alcohol resin. Only one type of the above-mentioned thermoplastic resin may be used, or two or more types may be used in combination.
- the base particle preferably contains a pigment or a dye. Only one kind of the above pigment or dye may be used, or two or more kinds thereof may be used in combination.
- the light omission is a phenomenon in which the light from the backlight passes through the melted resin portion when the liquid crystal display element is turned on. Due to light leakage, the contrast of the liquid crystal display element may be lowered, or the display quality called white spot may be lowered.
- the pigment examples include carbon black, titanium black, aniline black, iron oxide, lamp black, graphite, a copper-chromium composite oxide, and a copper-chromium-zinc composite oxide. From the viewpoint of increasing the degree of blackness and suppressing the occurrence of light leakage, the pigment preferably contains carbon black.
- Examples of the above dyes include pyrazole azo dyes, anilino azo dyes, triphenylmethane dyes, anthraquinone dyes, anthrapyridone dyes, benzylidene dyes, oxol dyes, pyrazolotriazole azo dyes, pyridone azo dyes, and cyanine dyes.
- Dyes, phenothiazine dyes, pyrolopyrazole azomethine dyes, xatin dyes, phthalocyanine dyes, benzopyran dyes, indigo dyes, pyromethene dyes, triarylmethane dyes, azomethine dyes, berylene dyes, perinone dyes, Quatarylene dyes, quinophthalone dyes and the like can be mentioned.
- the above dyes are blackened by mixing two or more of acidic dyes, direct dyes, basic dyes, medium dyes, acidic medium dyes, azoic dyes, disperse dyes, oil-soluble dyes, food dyes and derivatives thereof. It may be a dye or the like.
- the total content of the pigments and dyes in 100% by weight of the base particles is preferably 1% by weight or more, more preferably. It is 3% by weight or more, more preferably 5% by weight or more, preferably 20% by weight or less, more preferably 15% by weight or less, still more preferably 10% by weight or less.
- the CV value of the particle size of the base particles is preferably 10% or less, more preferably 7% or less.
- the upper limit of the CV value of the particle size of the base particles is not particularly limited.
- the CV value of the particle size of the base particles may be 30% or less.
- the CV value (coefficient of variation) of the particle size of the base particle can be measured as follows.
- CV value (%) ( ⁇ / Dn) ⁇ 100 ⁇ : Standard deviation of particle size of the base particle Dn: Mean value of particle size of the base particle
- the 10% K value of the substrate particles is preferably 10000 N / mm from the viewpoint of preventing damage to the substrate due to collision with the substrate and further improving the adhesiveness. It is 2 or less, more preferably 7000 N / mm 2 or less.
- the lower limit of the 10% K value of the base particles is not particularly limited.
- the 10% K value of the base particles may be 10 N / mm 2 or more.
- the 10% K value of the base particles can be measured as follows.
- the substrate particles Using a micro-compression tester, compress the substrate particles with a smooth indenter end face of a cylinder (diameter 50 ⁇ m, made of diamond) under the condition that a maximum test load of 20 mN is applied over 60 seconds at 25 ° C. At this time, the load value (N) and the compressive displacement (mm) are measured. From the obtained measured values, the above 10% K value can be obtained by the following formula.
- the microcompression tester for example, "Fisherscope H-100" manufactured by Fisher Co., Ltd. is used.
- the particle size of the base particles is preferably 0.9 ⁇ m or more, more preferably 7.9 ⁇ m or more, further preferably 9.9 ⁇ m or more, preferably 49 ⁇ m or less, and more preferably 29 ⁇ m. Below, it is more preferably 24.5 ⁇ m or less.
- the particle diameter of the base material particles means the diameter when the base material particles are spherical, and when the base material particles have a shape other than the true spherical shape, it is assumed to be a true sphere corresponding to the volume thereof. It means the diameter when it is used.
- the particle size of the base material particles means the average particle size of the base material particles measured by the particle size measuring device.
- the particle size measuring device include a particle size distribution measuring device using principles such as laser light scattering, electric resistance value change, and image analysis after imaging.
- a particle size distribution measuring device (“Multisizer 4” manufactured by Beckman Coulter Co., Ltd.) is used to measure the particle size of about 100,000 particles, and the average particle size is measured. A method of measurement can be mentioned.
- the average particle size indicates a number average particle size.
- the content of the base particles is preferably 13% by weight or more, more preferably 37% by weight or more, still more preferably 63% by weight or more in 100% by weight of the adhesive particles. Yes, preferably 99% by weight or less, more preferably 94% by weight or less, still more preferably 87% by weight or less.
- the adhesiveness can be further enhanced and aggregation can be suppressed more effectively.
- the content of the base particles is preferably 5% by volume or more, more preferably 10% by volume or more, still more preferably 15% by volume or more in 100% by volume of the adhesive particles. It is preferably 95% by volume or less, more preferably 85% by volume or less, and further preferably 75% by volume or less.
- the adhesiveness can be further enhanced and aggregation can be suppressed more effectively.
- the adhesive according to the present invention contains the above-mentioned adhesive particles and a binder.
- the adhesive particles are preferably dispersed in a binder and used as an adhesive.
- the adhesive is suitably used for a light control layer and a light control laminate. Only one kind of the binder may be used, or two or more kinds may be used.
- the above binder is not particularly limited.
- an insulating resin is generally used.
- the binder resin include vinyl resins, thermoplastic resins, curable resins, thermoplastic block copolymers, elastomers and the like. Only one kind of the binder resin may be used, or two or more kinds thereof may be used in combination.
- Examples of the vinyl resin include vinyl acetate resin, acrylic resin, styrene resin and the like.
- the thermoplastic resin include polyolefin resins, ethylene-vinyl acetate copolymers, and polyamide resins.
- Examples of the curable resin include epoxy resin, urethane resin, polyimide resin, unsaturated polyester resin and the like.
- the curable resin may be a room temperature curable resin, a thermosetting resin, a photocurable resin, or a moisture curable resin.
- the curable resin may be used in combination with a curing agent.
- thermoplastic block copolymer examples include a styrene-butadiene-styrene block copolymer, a styrene-isoprene-styrene block copolymer, a hydrogenated additive of a styrene-butadiene-styrene block copolymer, and a styrene-isoprene.
- -Hydrogen additives for styrene block copolymers and the like can be mentioned.
- the elastomer examples include styrene-butadiene copolymer rubber and acrylonitrile-styrene block copolymer rubber.
- the adhesive and the binder preferably contain a thermoplastic component or a thermosetting component.
- the adhesive and the binder may contain a thermoplastic component or may contain a thermosetting component.
- the adhesive includes, for example, a filler, a bulking agent, a softening agent, a plasticizer, a polymerization catalyst, a curing catalyst, a colorant, an antioxidant, a heat stabilizer, and a light stabilizer.
- a filler for example, a filler, a bulking agent, a softening agent, a plasticizer, a polymerization catalyst, a curing catalyst, a colorant, an antioxidant, a heat stabilizer, and a light stabilizer.
- UV absorbers, lubricants, antistatic agents, flame retardants and the like may be included.
- the content of the binder is preferably 10% by weight or more, more preferably 30% by weight or more, still more preferably 50% by weight or more, particularly preferably 70% by weight or more, and preferably 99% by weight in 100% by weight of the adhesive. It is .99% by weight or less, more preferably 99.9% by weight or less.
- the adhesiveness can be further improved.
- the content of the adhesive particles in 100% by weight of the adhesive is preferably 0.01% by weight or more, more preferably 0.1% by weight or more, preferably 80% by weight or less, and more preferably 60% by weight. Below, it is more preferably 40% by weight or less, particularly preferably 20% by weight or less, and most preferably 10% by weight or less.
- the content of the adhesive particles is not less than the above lower limit and not more than the above upper limit, the adhesiveness can be further improved and the gap can be controlled with high accuracy.
- the dimming laminate according to the present invention includes a first substrate, a second substrate, and a dimming layer arranged between the first substrate and the second substrate.
- the material of the dimming layer contains the above-mentioned adhesive particles.
- FIG. 4 is a cross-sectional view showing an example of a PDLC-type dimming laminate using adhesive particles according to the first embodiment of the present invention.
- the PDLC type dimming laminate 51 includes a first substrate 52, a second substrate 53, and a dimming layer 54.
- the dimming layer 54 is arranged between the first substrate 52 and the second substrate 53.
- a sealant may be arranged around the light control layer 54 between the first substrate 52 and the second substrate 53.
- the dimming layer 54 includes a liquid crystal capsule 54A, a binder 54B, and a plurality of adhesive particles 1.
- the liquid crystal capsule 54A is dispersed in the binder 54B.
- the liquid crystal capsule 54A is held in the binder 54B in the form of a capsule.
- the liquid crystal material may be encapsulated and dispersed in the binder, or the liquid crystal material may be dispersed in the binder as a continuous phase.
- Adhesive particles 1 are spherical adhesive particles. In the PDLC type dimming laminate 51, the thermosetting resin portion of the adhesive particles 1 is thermoset.
- FIG. 5 is a cross-sectional view showing an example of an SPD-type dimming laminate using adhesive particles according to the first embodiment of the present invention.
- the SPD type dimming laminate 61 includes a first substrate 62, a second substrate 63, and a dimming layer 64.
- the dimming layer 64 is arranged between the first substrate 62 and the second substrate 63.
- a sealant may be arranged around the dimming layer 64 between the first substrate 62 and the second substrate 63.
- the material of the dimming layer 64 contains a plurality of adhesive particles 1.
- the adhesive particles 1 are spherical adhesive particles.
- the thermosetting resin portion of the adhesive particles 1 is thermoset.
- the light control layer 64 contains droplets 64A of the light adjustment suspension and resin matrix 64B.
- the droplet 64A of the light-adjusted suspension is dispersed in the resin matrix 64B.
- the droplet 64A of the light-adjusted suspension is held in the resin matrix 64B in the droplet state.
- the droplet 64A of the light-adjusting suspension contains a dispersion medium 64Aa and a light-adjusting particle 64Ab.
- the light adjusting particles 64Ab are dispersed in the dispersion medium 64Aa.
- a transparent electrode may be formed on the surface of the first substrate and on the surface of the second substrate.
- Examples of the material for the transparent electrode include indium tin oxide (ITO) and the like.
- the dimming layer has dimming properties.
- the dimming property is a property that the visible light transmittance changes depending on the presence or absence of application of an electric field, and the amount of incident light can be adjusted.
- Examples of the mechanism of action for changing the visible light transmittance include a PDLC (Polymer Dispersed Liquid Crystal) method, an SPD (Suspended Personal Device) method, a guest-hosted liquid crystal method using a liquid crystal, a TN (Twisted Nematic) method, and a VA (Twisted Nematic) method.
- the material of the light control layer is not particularly limited, and may be any material as long as it has light control properties.
- the dimming laminate is preferably a PDLC dimming laminate or an SPD dimming laminate.
- the dimming layer preferably further contains a binder and a liquid crystal material dispersed in the binder.
- the liquid crystal material is not particularly limited.
- the liquid crystal material preferably has a property that the orientation changes when an electric field is applied.
- the liquid crystal material may be dispersed in the binder as a continuous phase, or may be dispersed in the binder in the form of a liquid crystal drop or a liquid crystal capsule.
- Examples of the liquid crystal material include nematic liquid crystal and cholesteric liquid crystal.
- Examples of the material of the nematic liquid crystal include cyanobiphenyl type, phenyl ester type, azoxybenzene type, fluorine-containing biphenyl type, carbonic acid ester type, Schiff base type and the like.
- As the material of the nematic liquid crystal only one kind may be used, or two or more kinds may be used in combination.
- Materials for the cholesteric liquid crystal include steroid-based cholesterol derivatives, Schiff base-based, azo-based, azoxy-based, benzoic acid ester-based, biphenyl-based, terphenyl-based, cyclohexylcarboxylic acid ester-based, phenylcyclohexane-based, biphenylcyclohexane-based, and pyrimidine.
- Nematic liquid crystals and smectic liquid crystals such as system, dioxane system, cyclohexylcyclohexane ester system, cyclohexylethane system, cyclohexane system, trans system, alkenyl system, stilben system, condensed polycyclic system, and mixed liquid crystal of these, Schiff base system, azo Examples thereof include materials to which a chiral component of an optically active material such as a system, an ester system, or a biphenyl system is added. As the material of the cholesteric liquid crystal, only one kind may be used, or two or more kinds may be used in combination.
- the binder holds the liquid crystal material and suppresses the flow of the liquid crystal material.
- the binder is not particularly limited. It is preferable that the binder does not dissolve in the liquid crystal material, has a strength that can withstand an external force, and has high transparency to reflected light and incident light.
- the binder material include water-soluble polymer materials such as gelatin, polyvinyl alcohol, cellulose derivatives, polyacrylic acid-based polymers, ethyleneimine, polyethylene oxide, polyacrylamide, polystyrene sulfonate, polyamidine, and isoprene-based sulfonic acid polymers.
- Examples thereof include materials that can be made into an aqueous emulsion such as fluororesin, silicone resin, acrylic resin, urethane resin, and epoxy resin.
- materials that can be made into an aqueous emulsion such as fluororesin, silicone resin, acrylic resin, urethane resin, and epoxy resin.
- the material of the binder only one kind may be used, or two or more kinds may be used in combination.
- the binder is preferably crosslinked with a crosslinking agent.
- the cross-linking agent is not particularly limited. It is preferable that the cross-linking agent is capable of forming a cross-link between the binders and making the binder dura mater, poorly soluble, or insolubilized.
- the cross-linking agent include acetaldehyde, glutaraldehyde, glyoxal, polyvalent metal salt compound carimyoban hydrate, adipic acid dihydrazide, melamine formalin oligomer, ethylene glycol diglycidyl ether, polyamide epichlorohydrin, and polycarbodiimide. Can be mentioned. Only one kind of the above-mentioned cross-linking agent may be used, or two or more kinds thereof may be used in combination.
- the light control layer preferably further contains a resin matrix and a light adjustment suspension dispersed in the resin matrix.
- the light-adjusting suspension contains a dispersion medium and light-adjusting particles dispersed in the dispersion medium.
- the photoadjusting particles include carbon-based materials such as polyiodide and carbon black, metal materials such as copper, nickel, iron, cobalt, chromium, titanium and aluminum, and inorganic compound materials such as silicon nitride, titanium nitride and aluminum oxide. And so on. Further, these materials may be particles coated with a polymer. As the light adjusting particles, only one kind may be used, or two or more kinds may be used in combination.
- the dispersion medium disperses the light-adjusting particles in a fluid state.
- the dispersion medium selectively adheres to the light-adjusting particles, coats the light-adjusting particles, and moves the light-adjusting particles to the phase-separated droplet phase during phase separation from the resin matrix.
- It is preferably a material that acts, has no electrical conductivity, and has no affinity for the resin matrix.
- the dispersion medium is preferably a liquid copolymer having a refractive index close to that of the resin matrix when made into a dimming laminate.
- a (meth) acrylic acid ester oligomer having a fluoro group or a hydroxyl group is preferable, and a (meth) acrylic acid ester oligomer having a fluoro group and a hydroxyl group is more preferable.
- the monomer units of the fluoro group or hydroxyl group are directed toward the photoregulated particles, and the remaining monomer units stabilize the droplets of the photoregulated suspension in the resin matrix. Therefore, the light-adjusting particles are easily dispersed in the light-adjusting suspension, and are easily guided into the droplets to which the light-adjusting particles are phase-separated at the time of phase separation from the resin matrix.
- Examples of the (meth) acrylic acid ester oligomer having a fluoro group or a hydroxyl group include 2,2,2-trifluoroethyl methacrylate / butyl acrylate / 2-hydroxyethyl acrylate copolymer and 3,5,5 acrylate.
- the weight average molecular weight of the (meth) acrylic acid ester oligomer is preferably 1000 or more, more preferably 2000 or more, preferably 20000 or less, and more preferably 10000 or less.
- the light control layer can be produced by using the resin material for forming the resin matrix and the light adjustment suspension.
- the resin material is preferably a resin material that is cured by irradiating it with energy rays.
- the resin material that is cured by irradiating with energy rays include a polymer composition containing a photopolymerization initiator and a polymer compound that is cured by energy rays such as ultraviolet rays, visible light, and electron beams.
- the polymer composition include a polymer composition containing a polymerizable monomer having an ethylenically unsaturated group and a photopolymerization initiator.
- the polymerizable monomer having an ethylenically unsaturated group include a non-crosslinkable monomer and a crosslinkable monomer.
- non-crosslinkable monomer examples include styrene monomers such as styrene, ⁇ -methylstyrene, and chlorstyrene; vinyl ether compounds such as methylvinyl ether, ethylvinyl ether, and propylvinyl ether; vinyl acetate, vinyl butyrate, and the like. Acid vinyl ester compounds such as vinyl laurate and vinyl stearate; halogen-containing monomers such as vinyl chloride and vinyl fluoride; as (meth) acrylic compounds, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth).
- Meta) Acrylate compound Oxygen atom-containing (meth) acrylate compound such as 2-hydroxyethyl (meth) acrylate, glycerol (meth) acrylate, polyoxyethylene (meth) acrylate, glycidyl (meth) acrylate; (meth) acrylonitrile, etc.
- Nitrile-containing monomer Halogen-containing (meth) acrylate compound such as trifluoromethyl (meth) acrylate and pentafluoroethyl (meth) acrylate; olefins such as diisobutylene, isobutylene, linearene, ethylene and propylene as ⁇ -olefin compounds.
- Compound; Examples of the conjugated diene compound include isoprene and butadiene.
- the crosslinkable monomer is a vinyl monomer such as divinylbenzene, 1,4-dibinyloxybutane, or divinylsulfone as a vinyl compound; and tetramethylolmethanetetra (meth) acrylate as a (meth) acrylic compound.
- Polyfunctional (meth) acrylate compounds such as (meth) acrylate, 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, 1,9-nonanediol di (meth) acrylate;
- As the allyl compound triallyl (iso) cyanurate, triallyl trimellitate, diallyl phthalate, diallylacrylamide, diallyl ether;
- silane compounds tetramethoxysilane, tetraethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxy Silane, ethyltriethoxysilane, isopropyltrimethoxysilane, isobutyltrimethoxysilane, cyclohexyltrimethoxysilane, n-hexyltrimethoxysilane,
- photopolymerization initiator examples include 2,2-dimethoxy-1,2-diphenylethane-1-one and 1- (4- (2-hydroxyethoxy) phenyl) -2-hydroxy-2-methyl-1-propane. -1-one, bis (2,4,6-trimethylbenzoyl) phenylphosphine oxide, 2-hydroxy-2-methyl-1-phenylpropan-1-one, (1-hydroxycyclohexyl) phenylketone and the like. Be done.
- the resin material may contain an organic solvent-soluble resin, a thermoplastic resin, poly (meth) acrylic acid and the like. Further, the resin material may contain various additives such as a colorant, an antioxidant, and an adhesion-imparting agent, and may contain a solvent.
- the light control layer preferably further contains a resin matrix and a light adjustment suspension dispersed in the resin matrix.
- the light-adjusting suspension contains a dispersion medium and light-adjusting particles dispersed in the dispersion medium.
- the photoadjusting particles include carbon-based materials such as polyiodide and carbon black, metal materials such as copper, nickel, iron, cobalt, chromium, titanium and aluminum, and inorganic compound materials such as silicon nitride, titanium nitride and aluminum oxide. And so on. Further, these materials may be particles coated with a polymer. As the light adjusting particles, only one kind may be used, or two or more kinds may be used in combination.
- the dispersion medium disperses the light-adjusting particles in a fluid state.
- the dispersion medium selectively adheres to the light-adjusting particles, coats the light-adjusting particles, and moves the light-adjusting particles to the phase-separated droplet phase during phase separation from the resin matrix.
- It is preferably a material that acts, has no electrical conductivity, and has no affinity for the resin matrix.
- the dispersion medium is preferably a liquid copolymer having a refractive index close to that of the resin matrix when made into a dimming laminate.
- a (meth) acrylic acid ester oligomer having a fluoro group or a hydroxyl group is preferable, and a (meth) acrylic acid ester oligomer having a fluoro group and a hydroxyl group is more preferable.
- the monomer units of the fluoro group or hydroxyl group are directed toward the photoregulated particles, and the remaining monomer units stabilize the droplets of the photoregulated suspension in the resin matrix. Therefore, the light-adjusting particles are easily dispersed in the light-adjusting suspension, and are easily guided into the droplets to which the light-adjusting particles are phase-separated at the time of phase separation from the resin matrix.
- Examples of the (meth) acrylic acid ester oligomer having a fluoro group or a hydroxyl group include 2,2,2-trifluoroethyl methacrylate / butyl acrylate / 2-hydroxyethyl acrylate copolymer and 3,5,5 acrylate.
- the weight average molecular weight of the (meth) acrylic acid ester oligomer is preferably 1000 or more, more preferably 2000 or more, preferably 20,000 or less, and more preferably 10,000 or less.
- the light control layer can be produced by using the resin material for forming the resin matrix and the light adjustment suspension.
- the resin material is preferably a resin material that is cured by irradiating it with energy rays.
- the resin material that is cured by irradiating with energy rays include a polymer composition containing a photopolymerization initiator and a polymer compound that is cured by energy rays such as ultraviolet rays, visible light, and electron beams.
- the polymer composition include a polymer composition containing a polymerizable monomer having an ethylenically unsaturated group and a photopolymerization initiator.
- the polymerizable monomer having an ethylenically unsaturated group include a non-crosslinkable monomer and a crosslinkable monomer.
- non-crosslinkable monomer examples include styrene monomers such as styrene, ⁇ -methylstyrene, and chlorstyrene; vinyl ether compounds such as methylvinyl ether, ethylvinyl ether, and propylvinyl ether; vinyl acetate, vinyl butyrate, and the like. Acid vinyl ester compounds such as vinyl laurate and vinyl stearate; halogen-containing monomers such as vinyl chloride and vinyl fluoride; as (meth) acrylic compounds, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth).
- Meta) Acrylate compound Oxygen atom-containing (meth) acrylate compound such as 2-hydroxyethyl (meth) acrylate, glycerol (meth) acrylate, polyoxyethylene (meth) acrylate, glycidyl (meth) acrylate; (meth) acrylonitrile, etc.
- Nitrile-containing monomer Halogen-containing (meth) acrylate compound such as trifluoromethyl (meth) acrylate and pentafluoroethyl (meth) acrylate; olefins such as diisobutylene, isobutylene, linearene, ethylene and propylene as ⁇ -olefin compounds.
- Compound; Examples of the conjugated diene compound include isoprene and butadiene.
- the crosslinkable monomer is a vinyl monomer such as divinylbenzene, 1,4-dibinyloxybutane, or divinylsulfone as a vinyl compound; and tetramethylolmethanetetra (meth) acrylate as a (meth) acrylic compound.
- Polyfunctional (meth) acrylate compounds such as (meth) acrylate, 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, 1,9-nonanediol di (meth) acrylate;
- As the allyl compound triallyl (iso) cyanurate, triallyl trimellitate, diallyl phthalate, diallylacrylamide, diallyl ether;
- silane compounds tetramethoxysilane, tetraethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxy Silane, ethyltriethoxysilane, isopropyltrimethoxysilane, isobutyltrimethoxysilane, cyclohexyltrimethoxysilane, n-hexyltrimethoxysilane,
- photopolymerization initiator examples include 2,2-dimethoxy-1,2-diphenylethane-1-one and 1- (4- (2-hydroxyethoxy) phenyl) -2-hydroxy-2-methyl-1-propane. -1-one, bis (2,4,6-trimethylbenzoyl) phenylphosphine oxide, 2-hydroxy-2-methyl-1-phenylpropan-1-one, (1-hydroxycyclohexyl) phenylketone and the like. Be done.
- the resin material may contain an organic solvent-soluble resin, a thermoplastic resin, poly (meth) acrylic acid and the like. Further, the resin material may contain various additives such as a colorant, an antioxidant, and an adhesion-imparting agent, and may contain a solvent.
- the first substrate and the second substrate are preferably light-transmitting substrates (light-transmitting substrates).
- the first substrate and the second substrate are preferably transparent substrates.
- light is transmitted from one side of the transparent substrate to the other side through the transparent substrate.
- Transparency also includes translucency.
- the transparent substrate may be colorless and transparent, or may be colored and transparent.
- the materials of the first substrate and the second substrate are not particularly limited.
- the material of the first substrate and the material of the second substrate may be the same or different.
- Examples of the material of the substrate include glass and a resin film.
- Examples of the glass include soda-lime glass for general construction, lead glass, borosilicate glass, glass having various compositions in other uses, and functional glass such as heat-reflecting glass, heat-absorbing glass, and tempered glass.
- the resin film include a polyester film such as polyethylene terephthalate, a polyolefin film such as polypropylene, and a resin film such as an acrylic resin film. Since the transparent substrate is excellent in transparency, moldability, adhesiveness, processability, etc., the transparent substrate is preferably a resin substrate, more preferably a resin film, and further preferably a polyethylene terephthalate film. ..
- the first substrate and the second substrate preferably include a substrate main body and a transparent conductive film formed on the surface of the substrate main body so that an electric field for dimming can be applied.
- the transparent conductive film include indium tin oxide (ITO), SnO 2 , In 2 O 3 , and the like.
- the visible light transmittance of the first substrate and the second substrate is preferably 75% or more, more preferably 80% or more.
- the visible light transmittance of the substrate can be measured in accordance with ISO13837: 2008 by performing spectroscopic measurement or the like. It can also be measured by a method or the like conforming to the JIS K6714 standard.
- Thermosetting resin Thermosetting resin A (bisphenol A type epoxy resin, "EXA-850-CRP” manufactured by DIC Corporation)
- Thermosetting resin B bisphenol A type epoxy resin, "EXA-4850-150” manufactured by DIC Corporation
- Thermosetting resin C (1,12-dodecanediol diglycidyl ether, "DOD-DEP” manufactured by Yokkaichi Chemical Company Limited)
- Inorganic oxide particles Silica dispersion (Nissan Chemical Industries, Ltd. "TOR-ST”, average particle diameter 12 nm, 40 wt% toluene dispersion of silica particles) Titania powder (Showa Denko "Super Titania F-6A", average particle size 15 nm)
- Base particle Base particle D ("Micropearl SP-209” manufactured by Sekisui Chemical Co., Ltd., average particle diameter 9.0 ⁇ m, CV value 5%)
- Base particle E (“Micropearl KBN-509” manufactured by Sekisui Chemical Co., Ltd., average particle diameter 9.0 ⁇ m, CV value 4%)
- Example 1 (1) Preparation of Adhesive Particles
- thermosetting resin A 47 parts by weight of thermosetting resin, 6 parts by weight of thermosetting resin C, and polyvinylpyrrolidone (manufactured by Fuji Film Wako Pure Chemical Industries, Ltd.) "K-30") 50 parts by weight, hexadecylammonium bromide 16.6 parts by weight, and methanol 1670 parts by weight were dissolved by mixing, and then 6.6 parts by weight of an amine curing agent was added. After the reaction at 45 ° C.
- a PET film having a thickness of 50 ⁇ m was prepared as a material for the first substrate and the second substrate.
- An acrylic hard coat resin (“Riodurus TYZ” manufactured by Toyo Ink Co., Ltd.) in which zirconia particles are dispersed is applied to one surface of the PET film, and then cured by irradiating with UV to obtain a first thickness of 0.8 ⁇ m. Hardcourt layer was formed.
- An acrylic hard coat resin (“Riodurus TYAB” manufactured by Toyo Ink Co., Ltd.) is applied to the other surface of the PET film and then cured by irradiating with UV to form a second hard coat layer having a thickness of 2.0 ⁇ m. did. In this way, a base film was obtained.
- This base film was placed in a vacuum device and evacuated. After the degree of vacuum reached 9.0 ⁇ 10 -4 Pa, argon gas was introduced, and the SiO x layer, SiO 2 was introduced on the surface of the first hard coat layer under an argon gas atmosphere by the DC magnetron sputtering method. The layer and the SiO x layer were formed in this order from the first hard coat layer side, and an indium tin oxide (ITO) layer was laminated therein. Specifically, using an ITO sintered body target having a SnO 2 of 7% by weight and a cathode having a maximum horizontal magnetic flux density of 1000 gauss on the target surface, a chamber pressure of 3.5 ⁇ 10 -1 Pa, Ar.
- ITO indium tin oxide
- a conductive layer (indium tin oxide layer) having a thickness of 18 nm was formed while introducing the gas into a vacuum apparatus with a ratio of gas to O 2 gas of 100: 1. Then, an IR heating oven (manufactured by Mino Group) was subjected to annealing treatment at 160 ° C. for 9 minutes to obtain a first substrate and a second substrate (transparent conductive film substrate). Adhesive particles were sprayed on the surface of the first substrate at a rate of 15 particles / cm 2 . Next, a dimming material (produced according to the method described in "Macropolymers", Vol. 26, pp. 6132 to 6134 (1993)) was laminated, and the second substrate was laminated. At this time, the adhesive particles were adhered to the first and second substrates by heating at 120 ° C. for 100 minutes at a pressure of 2 kgf / cm 2 , to prepare a dimming laminate.
- Examples 2 to 5 and Comparative Example 1 Adhesive particles and a dimming laminate were produced in the same manner as in Example 1 except that the blending amounts of the thermosetting resin and the inorganic oxide particles were changed as shown in Tables 1 and 2.
- Example 6 In a separable flask, 125 parts by weight of the substrate particles D, 75 parts by weight of the thermosetting resin, 25 parts by weight of the thermosetting resin B, and polyvinylpyrrolidone (“K-30” manufactured by Fuji Film Wako Pure Chemical Industries, Ltd.) 312.5. After dissolving 62.5 parts by weight of hexadecyltrimethylammonium bromide and 12500 parts by weight of methanol by mixing, 12.5 parts by weight of an amine curing agent was added. After the reaction at 45 ° C. for 10 hours, a silica dispersion was added so that the silica particles were 7.1 parts by weight, and the reaction was further carried out at 45 ° C. for 10 hours.
- K-30 manufactured by Fuji Film Wako Pure Chemical Industries, Ltd.
- Example 7 Adhesive particles and a dimming laminate were produced in the same manner as in Example 6 except that the base particle D was changed to the base particle E.
- Example 2 After that, the mother liquor was separated, washed with ion-exchanged water, and then dried under reduced pressure at 55 ° C. for 24 hours. As a result, the surface of the substrate particles was coated with the thermoplastic resin without having a thermosetting resin portion. Particles were made. A dimming laminate was produced in the same manner as in Example 1 except that the obtained particles were used.
- the above-mentioned transparent conductive film was prepared as the first substrate and the second substrate.
- the obtained adhesive particles were sprayed on the surface of the first substrate at a rate of 15 particles / cm 2 .
- the second substrate was laminated. Then, it was heated at 180 ° C. for 40 minutes, and it was observed whether or not the particle surface was dripping using a digital microscope (“VHX-2000” manufactured by KEYENCE CORPORATION).
- the image magnification was set to 200 times, and any 50 adhesive particles were observed.
- the dripping inhibitory property was judged according to the following criteria.
- Adhesiveness (tensile yield stress) Using the obtained adhesive particles, a test body (test sample) was prepared according to the above-mentioned adhesiveness test A. The tensile yield stress of the test piece at 23 ° C. was measured using a Tensilon universal material tester (“RTI-1310” manufactured by A & D Co., Ltd.) (adhesion test A). The adhesiveness was judged according to the following criteria.
- composition and results of the adhesive particles are shown in Tables 1 and 2 below.
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Abstract
Description
本発明に係る接着性粒子は、熱硬化性樹脂部と、複数の無機酸化物粒子とを含む。本発明に係る接着性粒子では、上記熱硬化性樹脂部中に上記無機酸化物粒子が分散しているか、又は、上記熱硬化性樹脂部の表面に上記無機酸化物粒子が付着している。上記接着性粒子では、上記熱硬化性樹脂部中に上記無機酸化物粒子が分散していてもよく、上記熱硬化性樹脂部の表面に上記無機酸化物粒子が付着していてもよい。接着性をより一層高め、塗布時に基板との衝突により破損することをより一層効果的に防ぐ観点からは、上記熱硬化性樹脂部中に上記無機酸化物粒子が分散していることが好ましい。
ρ:上記接着性粒子の粒子径の標準偏差
Dn:上記接着性粒子の粒子径の平均値
F:接着性粒子が10%又は30%圧縮変形したときの荷重値(N)
S:接着性粒子が10%又は30%圧縮変形したときの圧縮変位(mm)
R:接着性粒子の半径(mm)
第1の基板及び第2の基板として、ガラス基板を用意する。第1の基板の表面上に、接着性粒子を10個/mm2となるように散布する。次いで、JIS K6850の方法に準拠して5kgf/cm2の圧力で、100℃で60分間加熱して、接着性粒子を第1,第2の基板上に接着させ、試験体(試験サンプル)を作製する。テンシロン万能材料試験機を用いて、引張速度20mm/min、ロードセル定格1000Nで得られた試験体の23℃での接着強度を測定する。この測定値を、接着性粒子の引張降伏応力とする。
第1の基板及び第2の基板として、ガラス基板を用意する。第1の基板の表面上に、接着性粒子を10個/mm2となるように散布する。次いで、JIS K 6850の方法に準拠して5kgf/cm2の圧力で、130℃で60分間加熱して、接着性粒子を第1,第2の基板上に接着させ、試験体(試験サンプル)を作製する。テンシロン万能材料試験機を用いて、引張速度20mm/min、ロードセル定格1000Nで得られた試験体の23℃での接着強度を測定する。この測定値を、接着性粒子の引張降伏応力とする。
本発明に係る接着性粒子では、接着性粒子の粒子本体が熱硬化性樹脂部を含んでいてもよく、接着性粒子の粒子本体が熱硬化性樹脂部であってもよく、基材粒子の表面に接する被覆部が熱硬化性樹脂部を含んでいてもよく、該被覆部が熱硬化性樹脂部であってもよい。本発明に係る接着性粒子では、接着性粒子の粒子本体が熱硬化性樹脂部であることが好ましい。また、本発明に係る接着性粒子では、基材粒子の表面に接する被覆部が熱硬化性樹脂部であることが好ましい。上記熱硬化性樹脂部は、上記接着性粒子の粒子本体を構成していてもよく、基材粒子の表面に接する被覆部を構成していてもよい。上記熱硬化性樹脂部は、熱硬化性樹脂により形成されており、熱硬化性樹脂を含む。なお、上記熱硬化性樹脂部は、熱硬化性を損なわない範囲で、熱硬化性樹脂以外の成分を含んでいてもよい。上記熱硬化性樹脂以外の成分は、樹脂であってもよい。
上記無機酸化物粒子としては、シリカ、チタニア(酸化チタン)、酸化亜鉛、アルミナ、ガラス、タルク、カオリン、ベントナイト、及びジルコニウム等が挙げられる。
上記接着性粒子は、上記接着性粒子の内部に基材粒子を有していてもよく、有していなくてもよい。なお、上記接着性粒子の内部に基材粒子を有する接着性粒子とは、例えば、接着性粒子11又は接着性粒子21のように、基材粒子の表面の一部が被覆層又は複数の粒子により被覆されている被覆粒子を意味する。上記接着性粒子の内部に基材粒子を有さない接着性粒子とは、例えば、接着性粒子1のように、被覆部を有さない接着性粒子を意味する。
ρ:上記基材粒子の粒子径の標準偏差
Dn:上記基材粒子の粒子径の平均値
F:基材粒子が10%圧縮変形したときの荷重値(N)
S:基材粒子が10%圧縮変形したときの圧縮変位(mm)
R:基材粒子の半径(mm)
本発明に係る接着剤は、上述した接着性粒子と、バインダーとを含む。上記接着性粒子は、バインダー中に分散され、接着剤として用いられることが好ましい。上記接着剤は、調光層及び調光積層体に好適に用いられる。上記バインダーは1種のみが用いられてもよく、2種以上が用いられてもよい。
本発明に係る調光積層体は、第1の基板と、第2の基板と、上記第1の基板と上記第2の基板との間に配置された調光層とを備える。本発明に係る調光積層体では、上記調光層の材料が、上述した接着性粒子を含む。
上記調光層は、バインダーと、上記バインダー中に分散している液晶材料とをさらに含むことが好ましい。
上記調光層は、樹脂マトリックスと、上記樹脂マトリックス中に分散している光調整懸濁液とをさらに含むことが好ましい。
上記調光層は、樹脂マトリックスと、上記樹脂マトリックス中に分散している光調整懸濁液とをさらに含むことが好ましい。
上記第1の基板及び上記第2の基板は、光透過性を有する基板(光透過性基板)であることが好ましい。上記第1の基板及び上記第2の基板は、透明基板であることが好ましい。例えば、透明基板の一方側から、透明基板を介して他方側に光が透過する。例えば、透明基板の一方側から、透明基板を介して他方側にある物質を目視したときに、物質を視認可能である。透明には、半透明も含まれる。透明基板は、無色透明であってもよく、有色透明であってもよい。
熱硬化性樹脂A(ビスフェノールA型エポキシ樹脂、DIC社製「EXA-850-CRP」)
熱硬化性樹脂B(ビスフェノールA型エポキシ樹脂、DIC社製「EXA-4850-150」)
熱硬化性樹脂C(1,12-ドデカンジオールジグリシジルエーテル、四日市合成社製「DOD-DEP」)
アミン硬化剤(2,5(2,6)-ビス(アミノメチル)ビシクロ[2.2.1]ヘプタン)
シリカ分散液(日産化学社製「TOL-ST」、平均粒子径12nm、シリカ粒子の40重量%トルエン分散液)
チタニア粉末(昭和電工社製「スーパータイタニアF-6A」、平均粒子径15nm)
基材粒子D(積水化学工業社製「ミクロパールSP-209」、平均粒子径9.0μm、CV値5%)
基材粒子E(積水化学工業社製「ミクロパールKBN-509」、平均粒子径9.0μm、CV値4%)
(1)接着性粒子の作製
セパラブルフラスコに、熱硬化性樹脂A47重量部と、熱硬化性樹脂B47重量部と、熱硬化性樹脂C6重量部と、ポリビニルピロリドン(富士フィルム和光純薬社製「K-30」)50重量部と、ヘキサデシルアンモニウムブロミド16.6重量部と、メタノール1670重量部とを混合により溶解させた後、アミン硬化剤6.6重量部を添加した。45℃で10時間反応させた後に、シリカ粒子が2.9重量部となるようにシリカ分散液を添加してさらに45℃で10時間反応させた。その後、母液分離を行い、メタノールで洗浄した後、25℃真空下で24時間乾燥を行い、粒子本体(熱硬化性樹脂部)中に無機酸化物粒子が分散している接着性粒子を得た。
第1の基板、第2の基板の材料として、厚み50μmのPETフィルムを用意した。PETフィルムの一方の面に、ジルコニア粒子が分散されたアクリル系ハードコート樹脂(東洋インキ社製「リオデュラスTYZ」)を塗布した後、UVを照射することで硬化させ、厚み0.8μmの第1のハードコート層を形成した。PETフィルムの他方の面に、アクリル系ハードコート樹脂(東洋インキ社製「リオデュラスTYAB」)を塗布した後、UVを照射することで硬化させ、厚み2.0μmの第2のハードコート層を形成した。このようにして、基材フィルムを得た。
熱硬化性樹脂及び無機酸化物粒子の配合量を表1,2のように変更したこと以外は、実施例1と同様にして、接着性粒子及び調光積層体を作製した。
セパラブルフラスコに、基材粒子D125重量部と、熱硬化性樹脂A75重量部と、熱硬化性樹脂B25重量部と、ポリビニルピロリドン(富士フィルム和光純薬社製「K-30」)312.5重量部と、ヘキサデシルトリメチルアンモニウムブロミド62.5重量部と、メタノール12500重量部とを混合により溶解させた後、アミン硬化剤12.5重量部を添加した。45℃で10時間反応させた後に、シリカ粒子が7.1重量部となるようにシリカ分散液を添加し、さらに45℃で10時間反応させた。その後、母液分離を行い、メタノールで洗浄した後、25℃真空下で24時間乾燥を行い、基材粒子の表面が熱硬化性樹脂部により被覆され、被覆部(熱硬化性樹脂部)中に無機酸化物粒子が分散している接着性粒子を得た。得られた接着性粒子を用いたこと以外は、実施例1と同様にして、調光積層体を作製した。
基材粒子Dを基材粒子Eと変更したこと以外は、実施例6と同様にして、接着性粒子及び調光積層体を作製した。
セパラブルフラスコに、基材粒子D10重量部と、メタノール100重量部と、p-スチレンスルホン酸ナトリウム1.5重量%を溶解させたイオン交換水900重量部とを添加してよく分散させた。その後、スチレンモノマー10重量部と、シリカ粒子が1重量部となるようにシリカ分散液と、ペルオキソ二硫酸アンモニウム0.1重量部とをイオン交換水30重量部に溶解させた溶液を添加して、70℃で10時間反応させた。その後、母液分離を行い、イオン交換水で洗浄した後、55℃24時間減圧乾燥を行うことで、熱硬化性樹脂部を有さず、基材粒子の表面が熱可塑性樹脂により被覆されている粒子を作製した。得られた粒子を用いたこと以外は、実施例1と同様にして、調光積層体を作製した。
(1)凝集性(単粒子率)
得られた調光積層体について、接着性粒子の中心付近を通るようにイオンミリング装置(日立ハイテクノロジーズ社製「IM4000」)を用いて、接着性粒子の断面を切り出す。そして、電界放射型走査型電子顕微鏡(FE-SEM)を用いて、画像倍率を800倍に設定し、無作為に10視野選択し、接着性粒子を観察する。凝集していない接着性粒子数の、全接着性粒子数に対する割合(%)を、単粒子率とする。なお、単粒子率が高いほど、粒子の凝集性が低い。
得られた接着性粒子と、エポキシ樹脂(三菱ケミカル社製「jER828」)とを、シリンジに充填し、脱泡して、接着剤を得た。ディスペンサー(武蔵エンジニアリング社製「SHOTMASTER300」)を用いて、描画速度50mm/分、吐出圧0.2MPa、ノズル径0.25mmの条件で得られた接着剤を5cm吐出した際の接着性粒子の詰まりを目視で確認した。吐出性を、以下の基準で判定した。
〇〇:詰まりなく5cm吐出可能
○:詰まりなく3cm以上5cm未満吐出可能
×:3cm未満で詰まり発生
上記吐出性試験後の接着性粒子について、デジタルマイクロスコープ(キーエンス社製「VHX-2000」)を用いて、粒子が破損しているか否かを観察した。画像倍率は200倍とし、任意の500個の接着性粒子を観察した。接着性粒子の吐出による破損耐性を、以下の基準で判定した。
〇〇:破損した接着性粒子が5個未満
○:破損した接着性粒子が5個以上20個未満
×:破損した接着性粒子が20個以上
第1の基板、第2の基板として、上述した透明導電フィルムを用意した。第1の基板の表面上に、得られた接着性粒子を15個/cm2となるように散布した。次いで、第2の基板を積層した。その後、180℃で40分間加熱して、デジタルマイクロスコープ(キーエンス社製「VHX-2000」)を用いて、粒子表面が液だれしているか否かを観察した。画像倍率は200倍とし、任意の50個の接着性粒子を観察した。液だれ抑制性を、以下の基準で判定した。
〇〇:液だれしている接着性粒子が5個未満
○:液だれしている接着性粒子が5個以上15個未満
△:液だれしている接着性粒子が15個以上30個未満
×:液だれしている接着性粒子が30個以上
得られた接着性粒子を用いて、上述の接着性試験Aに従って試験体(試験サンプル)を作製した。テンシロン万能材料試験機(エー・アンド・デイ社製「RTI-1310」)を用いて、上記試験体の23℃での引張降伏応力を測定した(接着性試験A)。接着性を、以下の基準で判定した。
〇〇:引張降伏応力が0.12MPa以上
○:引張降伏応力が0.07MPa以上0.12MPa未満
×:引張降伏応力が0.07MPa未満
2…粒子本体(熱硬化性樹脂部)
3…無機酸化物粒子
11…接着性粒子
12…被覆部(被覆層)
13…無機酸化物粒子
14…基材粒子
21…接着性粒子
22…被覆部(複数の粒子)
23…無機酸化物粒子
24…基材粒子
51…PDLC方式の調光積層体
52…第1の基板
53…第2の基板
54…調光層
54A…液晶カプセル
54B…バインダー
61…SPD方式の調光積層体
62…第1の基板
63…第2の基板
64…調光層
64A…光調整懸濁液の液滴
64Aa…分散媒
64Ab…光調整粒子
64B…樹脂マトリックス
Claims (7)
- 熱硬化性樹脂部と、複数の無機酸化物粒子とを含み、
前記熱硬化性樹脂部中に前記無機酸化物粒子が分散しているか、又は、前記熱硬化性樹脂部の表面に前記無機酸化物粒子が付着している、接着性粒子。 - 前記無機酸化物粒子が、シリカである、請求項1に記載の接着性粒子。
- 前記熱硬化性樹脂部の熱硬化性樹脂が、エポキシ樹脂である、請求項1又は2に記載の接着性粒子。
- 接着性粒子が内部に基材粒子を有し、
前記基材粒子が、熱可塑性樹脂を含む、請求項1~3のいずれか1項に記載の接着性粒子。 - 前記基材粒子が、顔料又は染料を含む、請求項4に記載の接着性粒子。
- 請求項1~5のいずれか1項に記載の接着性粒子と、
バインダーとを含む、接着剤。 - 第1の基板と、第2の基板と、前記第1の基板と前記第2の基板との間に配置された調光層とを備え、
前記調光層の材料が、請求項1~5のいずれか1項に記載の接着性粒子を含む、調光積層体。
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Citations (6)
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JPS63191877A (ja) * | 1987-02-03 | 1988-08-09 | Toray Ind Inc | 粉末接着剤の製造方法 |
JPH01197721A (ja) * | 1988-02-01 | 1989-08-09 | Toray Ind Inc | 複合粒子 |
JPH0347877A (ja) * | 1990-05-31 | 1991-02-28 | Toray Ind Inc | エポキシ系球状粒子状接着剤及びその製造方法 |
JPH0990369A (ja) * | 1995-09-27 | 1997-04-04 | Toagosei Co Ltd | 液晶表示パネルの製造方法 |
JPH117027A (ja) * | 1997-06-16 | 1999-01-12 | Canon Inc | 接着スペーサー、これを用いた液晶素子とその製造方法 |
WO2018016378A1 (ja) * | 2016-07-19 | 2018-01-25 | 積水化学工業株式会社 | 調光積層体及び調光積層体用樹脂スペーサ |
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JPS63191877A (ja) * | 1987-02-03 | 1988-08-09 | Toray Ind Inc | 粉末接着剤の製造方法 |
JPH01197721A (ja) * | 1988-02-01 | 1989-08-09 | Toray Ind Inc | 複合粒子 |
JPH0347877A (ja) * | 1990-05-31 | 1991-02-28 | Toray Ind Inc | エポキシ系球状粒子状接着剤及びその製造方法 |
JPH0990369A (ja) * | 1995-09-27 | 1997-04-04 | Toagosei Co Ltd | 液晶表示パネルの製造方法 |
JPH117027A (ja) * | 1997-06-16 | 1999-01-12 | Canon Inc | 接着スペーサー、これを用いた液晶素子とその製造方法 |
WO2018016378A1 (ja) * | 2016-07-19 | 2018-01-25 | 積水化学工業株式会社 | 調光積層体及び調光積層体用樹脂スペーサ |
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