JP6293051B2 - ハードディスク装置用硬化性組成物 - Google Patents
ハードディスク装置用硬化性組成物 Download PDFInfo
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- JP6293051B2 JP6293051B2 JP2014525858A JP2014525858A JP6293051B2 JP 6293051 B2 JP6293051 B2 JP 6293051B2 JP 2014525858 A JP2014525858 A JP 2014525858A JP 2014525858 A JP2014525858 A JP 2014525858A JP 6293051 B2 JP6293051 B2 JP 6293051B2
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- -1 imidazole compound Chemical class 0.000 claims description 15
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- PXKLMJQFEQBVLD-UHFFFAOYSA-N bisphenol F Chemical compound C1=CC(O)=CC=C1CC1=CC=C(O)C=C1 PXKLMJQFEQBVLD-UHFFFAOYSA-N 0.000 claims description 10
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- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 4
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 claims description 4
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- TXBCBTDQIULDIA-UHFFFAOYSA-N 2-[[3-hydroxy-2,2-bis(hydroxymethyl)propoxy]methyl]-2-(hydroxymethyl)propane-1,3-diol Chemical compound OCC(CO)(CO)COCC(CO)(CO)CO TXBCBTDQIULDIA-UHFFFAOYSA-N 0.000 description 2
- MEVBAGCIOOTPLF-UHFFFAOYSA-N 2-[[5-(oxiran-2-ylmethoxy)naphthalen-2-yl]oxymethyl]oxirane Chemical compound C1OC1COC(C=C1C=CC=2)=CC=C1C=2OCC1CO1 MEVBAGCIOOTPLF-UHFFFAOYSA-N 0.000 description 2
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- ATGKAFZFOALBOF-UHFFFAOYSA-N cyclohexyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C1CCCCC1 ATGKAFZFOALBOF-UHFFFAOYSA-N 0.000 description 2
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- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 description 2
- VPLNCHFJAOKWBT-UHFFFAOYSA-N phenyl-tri(propan-2-yloxy)silane Chemical compound CC(C)O[Si](OC(C)C)(OC(C)C)C1=CC=CC=C1 VPLNCHFJAOKWBT-UHFFFAOYSA-N 0.000 description 2
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- STMDPCBYJCIZOD-UHFFFAOYSA-N 2-(2,4-dinitroanilino)-4-methylpentanoic acid Chemical compound CC(C)CC(C(O)=O)NC1=CC=C([N+]([O-])=O)C=C1[N+]([O-])=O STMDPCBYJCIZOD-UHFFFAOYSA-N 0.000 description 1
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- YTWBFUCJVWKCCK-UHFFFAOYSA-N 2-heptadecyl-1h-imidazole Chemical compound CCCCCCCCCCCCCCCCCC1=NC=CN1 YTWBFUCJVWKCCK-UHFFFAOYSA-N 0.000 description 1
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- NWVVVBRKAWDGAB-UHFFFAOYSA-N p-methoxyphenol Chemical compound COC1=CC=C(O)C=C1 NWVVVBRKAWDGAB-UHFFFAOYSA-N 0.000 description 1
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- 125000005634 peroxydicarbonate group Chemical group 0.000 description 1
- LYXOWKPVTCPORE-UHFFFAOYSA-N phenyl-(4-phenylphenyl)methanone Chemical compound C=1C=C(C=2C=CC=CC=2)C=CC=1C(=O)C1=CC=CC=C1 LYXOWKPVTCPORE-UHFFFAOYSA-N 0.000 description 1
- SYJCUYXTMQSJLM-UHFFFAOYSA-N phenylphosphanyl-(2,4,6-trimethylphenyl)methanone Chemical compound CC1=CC(C)=CC(C)=C1C(=O)PC1=CC=CC=C1 SYJCUYXTMQSJLM-UHFFFAOYSA-N 0.000 description 1
- 239000003504 photosensitizing agent Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- UQMOLLPKNHFRAC-UHFFFAOYSA-N tetrabutyl silicate Chemical compound CCCCO[Si](OCCCC)(OCCCC)OCCCC UQMOLLPKNHFRAC-UHFFFAOYSA-N 0.000 description 1
- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical group CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 description 1
- ZUEKXCXHTXJYAR-UHFFFAOYSA-N tetrapropan-2-yl silicate Chemical compound CC(C)O[Si](OC(C)C)(OC(C)C)OC(C)C ZUEKXCXHTXJYAR-UHFFFAOYSA-N 0.000 description 1
- ZQZCOBSUOFHDEE-UHFFFAOYSA-N tetrapropyl silicate Chemical compound CCCO[Si](OCCC)(OCCC)OCCC ZQZCOBSUOFHDEE-UHFFFAOYSA-N 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
Classifications
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
- C08L63/10—Epoxy resins modified by unsaturated compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- 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
- C08G59/40—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 curing agents used
- C08G59/4007—Curing agents not provided for by the groups C08G59/42 - C08G59/66
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- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0008—Electrical discharge treatment, e.g. corona, plasma treatment; wave energy or particle radiation
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- C—CHEMISTRY; METALLURGY
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
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- 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
- C08G59/22—Di-epoxy compounds
- C08G59/24—Di-epoxy compounds carbocyclic
- C08G59/245—Di-epoxy compounds carbocyclic aromatic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- 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
- C08G59/32—Epoxy compounds containing three or more epoxy groups
- C08G59/3209—Epoxy compounds containing three or more epoxy groups obtained by polymerisation of unsaturated mono-epoxy compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- 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
- C08G59/40—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 curing agents used
- C08G59/50—Amines
- C08G59/56—Amines together with other curing agents
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/07—Aldehydes; Ketones
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/10—Homopolymers or copolymers of methacrylic acid esters
- C08L33/12—Homopolymers or copolymers of methyl methacrylate
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- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
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- 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
- C09J163/04—Epoxynovolacs
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
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- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/4806—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
- G11B5/4826—Mounting, aligning or attachment of the transducer head relative to the arm assembly, e.g. slider holding members, gimbals, adhesive
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
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- Macromonomer-Based Addition Polymer (AREA)
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
Description
(1)エチレン性不飽和基を有しエポキシ基を有さない化合物(成分A1)及びエチレン性不飽和基及びエポキシ基を有する化合物(成分A2)、又は、前記成分A2及びエポキシ基を有しエチレン性不飽和基を有さない化合物(成分A3)、又は、前記成分A1及び前記成分A3、又は、前記成分A1及び前記成分A2及び前記成分A3、又は、前記成分A2;
光ラジカル重合開始剤(成分B);並びに、
前記エポキシ基を重合しうる化合物(成分C)
を含むハードディスク装置用硬化性組成物であって、前記成分Cがアミンアダクトであるハードディスク装置用硬化性組成物、並びに、
(2)前記(1)記載のハードディスク装置用硬化性組成物を使用して磁気ヘッド部位に部品を接着する工程を含む、ハードディスク装置の製造方法に関する。
ハードディスク装置用硬化性組成物(以下、本発明の組成物ともいう)は、ハードディスク装置の、好ましくは磁気ヘッド部位の部品の接着固定において、70℃程度まで上昇するといわれるハードディスク装置組立時の温度に対して、接着固定の精度を維持し、硬化後のガラス転移温度が高いこと(以下、接着安定性ともいう)が確保される観点から、本発明の組成物中の硬化性化合物は、エネルギー照射された際に光ラジカル開始剤から発生したラジカルによって光重合して組成物を硬化させるエチレン性不飽和基と、アミンアダクト及び熱ラジカル開始剤によって重合して組成物を硬化させるエポキシ基の両方を有することが必要である。
脂環型エポキシ化合物の具体的な例として、3′,4′−エポキシシクロヘキシルメチル−3,4−エポキシシクロヘキサンカルボキシレート(ダイセル社製セロキサイド(登録商標)2021P)、1,2:8,9−ジエポキシリモネン(ダイセル社製セロキサイド3000)、1,2−エポキシ−4−ビニルシクロヘキサン(ダイセル社製セロキサイド2000)、2,2−ビス(ヒドロキシメチル)−1−ブタノールの1,2−エポキシ−4−(2−オキシラニル)シクロヘキサン付加物(ダイセル社製EHPE3150)などがある。
本発明の硬化性組成物は、成分A1及びA2を光重合させる際のラジカル発生源として光ラジカル開始剤(成分B)を含有する。
エネルギー照射が期待できない影の部分の接着対象部位に塗工された本発明の硬化性組成物を、好ましくは100℃以下、より好ましくは80℃以下程度の低温度下でも成分A2及びA3のエポキシ基同士を重合させて硬化させる観点から、本発明の硬化性組成物は、成分A2及びA3の硬化剤としてアミンアダクト(成分C)を含有する。成分Cとしては、ADEKA社から、アデカハードナーEH5030S、味の素ファインテクノ社から、アミキュアPN−23、アミキュアPN−30、アミキュアMY−24、アミキュアMY−H等として市販されているアミンアダクトを使用することができる。
本発明の硬化性組成物は、硬化収縮による硬化応力を低減する観点から、フィラーを添加することが好ましい。フィラーとして、無機フィラーと有機フィラーがあるが、化合物からの脱落によるディスクや磁気ヘッドへの影響を抑制する観点から有機フィラーが好ましい。無機フィラーとしては、タルク、シリカ、マイカなどが挙げられる。有機フィラーとしては、ポリアクリレート粒子、コアシェル型のポリアクリレート粒子、ポリスチレン粒子、アクリル−スチレン共重合粒子、ポリプロピレン粒子、ポリエチレン粒子などが挙げられる。
本発明の硬化性組成物に光照射した際に、影になる部分が生じうるハードディスク装置の接着対象部位について、光重合以外の重合機構によって本発明の硬化性組成物を迅速に接着固定し、対象部位の接着安定性を確保する観点から、本発明の硬化性組成物における成分A1と成分A2の合計と成分A2と成分A3の合計の重量比((A1+A2)/(A2+A3))は、好ましくは80/20〜1/99、より好ましくは70/30〜3/97、更に好ましくは40/60〜5/95である。
弾性率の変化率=100×{(25℃弾性率)−(80℃弾性率)}/25℃弾性率
本発明の硬化性組成物は、ハードディスクの磁気ヘッド部位における部品の接着用に使用することができる。したがって、ハードディスク装置中の磁気ヘッド周辺部位を接着する工程を有するハードディスク装置の製造方法において、本発明の硬化性組成物を使用して磁気ヘッド周辺部位の接着をして、例えば、ピエゾ素子の固定、磁気ヘッドの固定、磁気ヘッドとサスペンションの固定(ヘッド・ジンバル・アセンブル(HGA))等、好ましくはピエゾ素子の固定を行うと、接着安定性が十分に確保されて磁気ヘッドに付着し、高精度化の磁気ヘッドの位置制御の下で、読み書きにエラーが抑制された、品質の高いハードディスク装置を製造できる。
(1)成分A1:ライトアクリレートBP−4EAL(共栄社化学社)
(2)成分A2:部分メタクリレート化ビスフェノールA型エポキシ化合物(KR−1、下記合成例1参照)
(3)成分A3:EPICLON(登録商標)EXA−850CRP(ビスフェノールA型エポキシ化合物、DIC社)
成分A3:EPICLON(登録商標)EXA−830LVP(ビスフェノールF型エポキシ化合物、DIC社)
成分A3:EPICLON(登録商標)N−730A(フェノールノボラック型エポキシ化合物、DIC社)
成分A3:EPICLON(登録商標)HP−4032D(ナフタレン型エポキシ化合物、DIC社)(4)成分B:イルガキュア184(1−ヒドロキシシクロヘキシル−フェニルケトン、BASF社)
(5)成分C:アデカハードナー(登録商標)EH5030S(ADEKA社)
(6)成分D:キュアゾール(登録商標)C17Z(四国化成社)
(7)成分E:パーチブル(登録商標)O(日本油脂社)
KR−1の合成
攪拌機、エアー導入管、温度計、還流冷却管を備えた500mlガラス製4ツ口フラスコを用意し、ビスフェノールA型エポキシ樹脂;エピクロン(登録商標)EXA−850CRP〔DIC社製〕を340g(2.0当量/エポキシ基)、メタクリル酸90.4g(1.0当量)、TPP(トリフェニルホスフィン)〔東京化成社製〕0.5g(1.9ミリ当量)、重合禁止剤としてハイドロキノン25mg及びp-メトキシフェノール100mgを混合し、100℃で酸価が1.0KOHmg/g以下になるまで攪拌して反応させた。反応終了後、エアーを液中に吹き込みながら80℃で2時間酸化処理を行い、部分メタクリレート化ビスフェノールA型エポキシ化合物(KR−1)を得た。
表1に記載の配合重量に基づき、各成分を、配合槽(NO.300(近畿容器製)、容量300ml、ポリエチレン製)に添加し、室温環境の下、撹拌機(RW28(IKA社製)、600rpm)で透明になるまで撹拌して、実施例1〜6の硬化性組成物及び比較例1の硬化性組成物を調整した。実施例1〜6及び比較例1の実施における室温は23℃であった。
実施例1〜5及び比較例1の硬化性組成物に対して、アイグラフィックス社製 UB−031−A/BM−E1メタルハライドランプM06−I31を使用して、UV6000mJ/cm2のエネルギー照射を行い、次いで、実施例1〜4の本発明の硬化性組成物に対して、120℃、1時間の加熱を行った。実施例6の本発明の硬化性組成物に対して、120℃、1時間の加熱のみを行った。実施例1〜6及び比較例1の硬化性組成物を硬化させた硬化体を得た。
実施例1〜6の硬化性組成物の粘度、並びに実施例1〜6及び比較例1の硬化性組成物について得た上記硬化体のガラス転移点及び弾性率の変化率を測定し、結果を表1に示した。
表2に記載の配合重量に基づき、実施例1と同様にして、実施例7〜14の硬化性組成物を調整した。また実施例1の硬化条件と同様にして、実施例7〜14の硬化性組成物を硬化させた硬化体を得た。さらに実施例1の評価条件と同様にして、実施例7〜14の硬化性組成物の粘度、及び実施例7〜14の硬化性組成物について得た上記硬化体のガラス転移点及び弾性率の変化率を測定し、結果を表2に示した。
Claims (12)
- エチレン性不飽和基を有しエポキシ基を有さない化合物(成分A1)及びエチレン性不飽和基及びエポキシ基を有する化合物(成分A2)、又は、前記成分A2及びエポキシ基を有しエチレン性不飽和基を有さない化合物(成分A3)、又は、前記成分A1及び前記成分A3、又は、前記成分A1及び前記成分A2及び前記成分A3、又は、前記成分A2;
光ラジカル重合開始剤(成分B);
前記エポキシ基を重合しうる化合物(成分C);
イミダゾール化合物及び/又は三級アミン化合物(成分D);並びに、
熱ラジカル重合開始剤(成分E)
を含む、ハードディスク装置用硬化性組成物であって、前記成分Cがアミンアダクトであるハードディスク装置用硬化性組成物。 - 前記ハードディスク装置用硬化性組成物の硬化後のガラス転移温度が70〜160℃である、請求項1記載のハードディスク装置用硬化性組成物。
- 粘度が1000〜50000mPa・sである、請求項1又は2記載のハードディスク装置用硬化性組成物。
- 熱ラジカル重合開始剤(成分E)が、ケトンパーオキサイド、パーオキシケタール、ジアシルパーオキサイド、パーオキシエステル又はパーオキシジカーボネートである、請求項1〜3のいずれか1項記載のハードディスク装置用硬化性組成物。
- 前記成分A1が、(メタ)アクリレート化合物である、請求項1〜4のいずれか1項記載のハードディスク装置用硬化性組成物。
- 前記成分A3が、ビスフェノールA型エポキシ化合物、ビスフェノールF型エポキシ化合物、ビスフェノールAD型エポキシ化合物、フェノールノボラック型エポキシ化合物、ナフタレン型エポキシ化合物、これらの水添化化合物及び脂環型エポキシ化合物からなる群より選ばれる少なくとも1種の化合物である、請求項1〜5のいずれか1項記載のハードディスク装置用硬化性組成物。
- 前記成分A2が、エポキシ化合物の(メタ)アクリル酸変性化合物である、請求項1〜6のいずれか1項記載のハードディスク装置用硬化性組成物。
- 前記成分A1と前記成分A2の合計と前記成分A2と成分A3の合計の重量比((A1+A2)/(A2+A3))が、40/60〜5/95である、請求項1〜7のいずれか1項記載のハードディスク装置用硬化性組成物。
- 前記成分A1と前記成分A2の合計と前記成分Bの重量比((A1+A2)/B)が、99.9/0.1〜90/10であり、
前記エポキシ基と前記成分Cのモル比(エポキシ基/C)が、75/25〜45/55である、請求項1〜8のいずれか1項記載のハードディスク装置用硬化性組成物。 - 硬化性組成物中、成分A1、A2、A3、B及びCの合計量が、80〜100重量%である、請求項1〜9のいずれか1項記載のハードディスク装置用硬化性組成物。
- ハードディスクの磁気ヘッド部位における部品の接着用である、請求項1〜10のいずれか1項記載のハードディスク装置用硬化性組成物。
- 請求項1〜11のいずれか1項記載のハードディスク装置用硬化性組成物を使用して磁気ヘッド部位に部品を接着する工程を含む、ハードディスク装置の製造方法。
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