JP2007503518A - 無溶媒のuv架橋しうるアクリレ−ト感圧接着剤の製造法 - Google Patents
無溶媒のuv架橋しうるアクリレ−ト感圧接着剤の製造法 Download PDFInfo
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- JP2007503518A JP2007503518A JP2006529863A JP2006529863A JP2007503518A JP 2007503518 A JP2007503518 A JP 2007503518A JP 2006529863 A JP2006529863 A JP 2006529863A JP 2006529863 A JP2006529863 A JP 2006529863A JP 2007503518 A JP2007503518 A JP 2007503518A
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- Prior art keywords
- polymerization
- sensitive adhesive
- pressure sensitive
- weight
- polyacrylate pressure
- Prior art date
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- 239000004820 Pressure-sensitive adhesive Substances 0.000 title claims abstract description 68
- 238000004519 manufacturing process Methods 0.000 title claims description 14
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 title description 14
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 61
- 229920000058 polyacrylate Polymers 0.000 claims abstract description 45
- 238000000034 method Methods 0.000 claims description 65
- 229920000642 polymer Polymers 0.000 claims description 34
- 238000004132 cross linking Methods 0.000 claims description 26
- 239000000178 monomer Substances 0.000 claims description 26
- 238000000576 coating method Methods 0.000 claims description 23
- 239000011248 coating agent Substances 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 19
- 239000003999 initiator Substances 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 18
- 230000001070 adhesive effect Effects 0.000 claims description 16
- 239000000853 adhesive Substances 0.000 claims description 13
- 150000003254 radicals Chemical class 0.000 claims description 11
- 150000001875 compounds Chemical class 0.000 claims description 10
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 7
- 238000010526 radical polymerization reaction Methods 0.000 claims description 6
- 125000000217 alkyl group Chemical group 0.000 claims description 5
- 125000004432 carbon atom Chemical group C* 0.000 claims description 5
- 230000003712 anti-aging effect Effects 0.000 claims description 4
- 125000000524 functional group Chemical group 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 239000004014 plasticizer Substances 0.000 claims description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
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- 239000002253 acid Substances 0.000 claims description 2
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 2
- 125000005022 dithioester group Chemical group 0.000 claims description 2
- 239000000194 fatty acid Substances 0.000 claims description 2
- 229930195729 fatty acid Natural products 0.000 claims description 2
- 150000004665 fatty acids Chemical class 0.000 claims description 2
- 239000004611 light stabiliser Substances 0.000 claims description 2
- 125000005395 methacrylic acid group Chemical group 0.000 claims description 2
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- 239000000945 filler Substances 0.000 claims 1
- HIZCIEIDIFGZSS-UHFFFAOYSA-L trithiocarbonate Chemical compound [S-]C([S-])=S HIZCIEIDIFGZSS-UHFFFAOYSA-L 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 12
- -1 nitroxide compounds Chemical class 0.000 description 25
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- 238000006243 chemical reaction Methods 0.000 description 15
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- 239000002390 adhesive tape Substances 0.000 description 14
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- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 7
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- 238000005227 gel permeation chromatography Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 125000003342 alkenyl group Chemical group 0.000 description 5
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- MSMAPCFQRXQMRL-UHFFFAOYSA-N (2-oxo-1,2-diphenylethyl) prop-2-enoate Chemical compound C=1C=CC=CC=1C(OC(=O)C=C)C(=O)C1=CC=CC=C1 MSMAPCFQRXQMRL-UHFFFAOYSA-N 0.000 description 4
- ICLRUBKEPLWDJJ-UHFFFAOYSA-N 2-phenylethoxymethanethioic s-acid Chemical compound SC(=O)OCCC1=CC=CC=C1 ICLRUBKEPLWDJJ-UHFFFAOYSA-N 0.000 description 4
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- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 4
- 125000006702 (C1-C18) alkyl group Chemical group 0.000 description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 3
- OZAIFHULBGXAKX-VAWYXSNFSA-N AIBN Substances N#CC(C)(C)\N=N\C(C)(C)C#N OZAIFHULBGXAKX-VAWYXSNFSA-N 0.000 description 3
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 3
- 125000003277 amino group Chemical group 0.000 description 3
- 125000003118 aryl group Chemical group 0.000 description 3
- 238000010560 atom transfer radical polymerization reaction Methods 0.000 description 3
- 150000008366 benzophenones Chemical class 0.000 description 3
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 3
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- 239000012876 carrier material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010894 electron beam technology Methods 0.000 description 3
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- 239000000976 ink Substances 0.000 description 3
- 239000003607 modifier Substances 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 239000011541 reaction mixture Substances 0.000 description 3
- 239000013557 residual solvent Substances 0.000 description 3
- 239000007858 starting material Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- NJXYTXADXSRFTJ-UHFFFAOYSA-N 1,2-Dimethoxy-4-vinylbenzene Chemical compound COC1=CC=C(C=C)C=C1OC NJXYTXADXSRFTJ-UHFFFAOYSA-N 0.000 description 2
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- DTQVDTLACAAQTR-UHFFFAOYSA-N Trifluoroacetic acid Chemical compound OC(=O)C(F)(F)F DTQVDTLACAAQTR-UHFFFAOYSA-N 0.000 description 2
- 239000004775 Tyvek Substances 0.000 description 2
- 229920000690 Tyvek Polymers 0.000 description 2
- 150000008062 acetophenones Chemical class 0.000 description 2
- 125000003545 alkoxy group Chemical group 0.000 description 2
- XXROGKLTLUQVRX-UHFFFAOYSA-N allyl alcohol Chemical compound OCC=C XXROGKLTLUQVRX-UHFFFAOYSA-N 0.000 description 2
- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical compound C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 description 2
- 229910052794 bromium Inorganic materials 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- RWGFKTVRMDUZSP-UHFFFAOYSA-N cumene Chemical compound CC(C)C1=CC=CC=C1 RWGFKTVRMDUZSP-UHFFFAOYSA-N 0.000 description 2
- 238000001723 curing Methods 0.000 description 2
- 125000000753 cycloalkyl group Chemical group 0.000 description 2
- BMFYCFSWWDXEPB-UHFFFAOYSA-N cyclohexyl(phenyl)methanone Chemical compound C=1C=CC=CC=1C(=O)C1CCCCC1 BMFYCFSWWDXEPB-UHFFFAOYSA-N 0.000 description 2
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 description 2
- FJKIXWOMBXYWOQ-UHFFFAOYSA-N ethenoxyethane Chemical compound CCOC=C FJKIXWOMBXYWOQ-UHFFFAOYSA-N 0.000 description 2
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- 238000001879 gelation Methods 0.000 description 2
- 125000005843 halogen group Chemical group 0.000 description 2
- 125000001072 heteroaryl group Chemical group 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 125000001261 isocyanato group Chemical group *N=C=O 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
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- 238000013021 overheating Methods 0.000 description 2
- 125000004430 oxygen atom Chemical group O* 0.000 description 2
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- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
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- YRHRIQCWCFGUEQ-UHFFFAOYSA-N thioxanthen-9-one Chemical compound C1=CC=C2C(=O)C3=CC=CC=C3SC2=C1 YRHRIQCWCFGUEQ-UHFFFAOYSA-N 0.000 description 2
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- UXCBMLGLQWBHGL-UHFFFAOYSA-N (2-cyclohexylsulfonylacetyl) 2-cyclohexylsulfonylethaneperoxoate Chemical compound C1CCCCC1S(=O)(=O)CC(=O)OOC(=O)CS(=O)(=O)C1CCCCC1 UXCBMLGLQWBHGL-UHFFFAOYSA-N 0.000 description 1
- BEUWVXJCXULGES-UHFFFAOYSA-N (2-tert-butylphenyl) 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC1=CC=CC=C1C(C)(C)C BEUWVXJCXULGES-UHFFFAOYSA-N 0.000 description 1
- VHRJYXSVRKBCEX-UHFFFAOYSA-N (2-tert-butylphenyl) prop-2-enoate Chemical compound CC(C)(C)C1=CC=CC=C1OC(=O)C=C VHRJYXSVRKBCEX-UHFFFAOYSA-N 0.000 description 1
- JHPBZFOKBAGZBL-UHFFFAOYSA-N (3-hydroxy-2,2,4-trimethylpentyl) 2-methylprop-2-enoate Chemical compound CC(C)C(O)C(C)(C)COC(=O)C(C)=C JHPBZFOKBAGZBL-UHFFFAOYSA-N 0.000 description 1
- 239000001124 (E)-prop-1-ene-1,2,3-tricarboxylic acid Substances 0.000 description 1
- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 description 1
- MFEWNFVBWPABCX-UHFFFAOYSA-N 1,1,2,2-tetraphenylethane-1,2-diol Chemical compound C=1C=CC=CC=1C(C(O)(C=1C=CC=CC=1)C=1C=CC=CC=1)(O)C1=CC=CC=C1 MFEWNFVBWPABCX-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
- B01J19/0066—Stirrers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
- B01J19/1812—Tubular reactors
- B01J19/1818—Tubular reactors in series
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
- B01J19/20—Stationary reactors having moving elements inside in the form of helices, e.g. screw reactors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/02—Feed or outlet devices; Feed or outlet control devices for feeding measured, i.e. prescribed quantities of reagents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
- B29C48/435—Sub-screws
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- B—PERFORMING OPERATIONS; TRANSPORTING
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Abstract
Description
R´R″N−O−X
[式中、Xは不飽和モノマ−を重合させうるラジカル種を表わす]
の化合物が開始剤として使用される。しかしながら、反応の転化率は一般に低い。特別な問題は、非常に低い収率及び分子量でしか進行しないアクリレ−トの重合である。
を含む少なくとも1つの化合物を重合調節剤として存在させて調節される、プラネタリ−ローラー押出し機中でのラジカル無溶媒重合法で達成される。
・(メタ)アクリル酸に基づくモノマ−に加えて、共重合しうる光開始剤を含むモノマ−
混合物の重合操作、
・無溶媒で行う重合、
・プラネタリ−ローラー押出し機の使用の可能な重合、
・制御剤を使用する結果としての、1.2−4の多分散度の達成、
・場合によって重合操作に続く脱揮発成分操作、
・ポリマ−の、直接的な更なる加工可能、溶媒の循環の不必要、
・ポリマ−の溶融物からのゲルのないコ−テイング、及び
・コ−ティング後、UV架橋を補助且つ促進する調節剤を添加してのUV光での硬化。
a)式
CH2=CH(R1)(COOR2)
[式中、R1=HまたはCH3及びR2は炭素数1−30のアルキル鎖またはHである]
を有するアクリルエステル及び/またはメタクリルエステル及び/またはこれらの遊
離酸70−99.9重量%、特に75−99.5重量%、
b)ラジカル重合できる二重結合を有する共重合性UV光開始剤0.1−2重量%、特に0.4−1重量%、
c)所望により、官能基を有するオレフィン性不飽和モノマ−0−30重量%。
に従うアクリルモノマ−がc)に対して使用される。成分c)として特に好適な例は、アクリル酸ヒドロキシエチル、アクリル酸ヒドロキシプロピル、メタクリル酸ヒドロキシエチル、メタクリル酸ヒドロキシプロピル、アリルアルコ−ル、無水マレイン酸、無水イタコン酸、イタコン酸、アクリルアミド、及びメタクリル酸グリセリディル(glyceridyl)、アクリル酸ベンジル、メタクリル酸ベンジル、アクリル酸フェニル、メタクリル酸フェニル、アクリル酸tert−ブチルフェニル、メタクリル酸tert−ブチルフェニル、アクリル酸フェノキシエチル、メタクリル酸フェノキシエチル、メタクリル酸2−ブトキシエチル、アクリル酸2−ブトキシエチル、メタクリル酸ジメチルアミノエチル、アクリル酸ジメチルアミノエチル、メタクリル酸ジエチルアミノエチル、アクリル酸ジエチルアミノエチル、メタクリル酸シアノエチル、アクリル酸シアノエチル、メタクリル酸グリセリル、メタクリル酸6−ヒドロキシヘキシル、N−tert−ブチルアクリルアミド、N−メチロ−ルメタクリルアミド、N−(ブトキシメチル)メタクリルアミド、N−メチロ−ルアクリルアミド、N−(エトキシメチル)アクリルアミド、N−イソプロピルアクリルアミド、ビニル酢酸、アクリル酸テトラヒドロフルフリル、β−アクリロイロキシプロピオン酸、トリクロロアクリル酸、フマル酸、クロトン酸、アコニチン酸、及びジメチルアクリル酸である。但しこれらの列挙は、完全なものとして理解すべきではない。ある更に好適な態様において、芳香族ビニル化合物も成分c)に使用される。この場合、芳香核は好ましくはC4−C18からなり、ヘテロ原子を含むことができる。特に好適な例は、スチレン、4−ビニルピリジン、N−ビニルフタルイミド、メチルスチレン、3、4−ジメトキシスチレン、及び4−ビニル安息香酸である。但し、これらの列挙は完全なものとして理解すべきではない。
由来するものである:
・分岐鎖及び直鎖C1−C18アルキル基、C3−C18アルケニル基、C3−C18アルキニル基、
・HまたはC1−C18アルコキシ、
・少なくとも1つのOH基または1つのハロゲン原子または1つのシリルエ−テルで
置換されたC3−C18アルキニル基、C3−C18アルケニル基、C1−C18アルキル基、
・少なくとも1つの酸素原子及び1つのNR´基を炭素鎖に有するC2−C18ヘテロ−アルキル基、
・少なくとも1つのエステル基、アミン基、カ−ボネ−ト基、シアノ、イソシアナト
及び/またはエポキシド基及び/または硫黄で置換されたC3−C18アルキニル基、C3−C18アルケニル基、C1−C18アルキル基、
・C3−C12シクロアルキル基、
・C6−C18アリ−ルまたはベンジル基、
・水素]
の調節剤を用いて行われる。
ハロゲンは好ましくはF、Cl、BrまたはI、より好ましくはClまたはBrである。
tert−ブチルベンジル−または更なる置換フェニル、例えばエチルフェニル、トルエン、キシレン、メシチレン、イソプロピルベンゼン、ジクロロベンゼンまたはブロモトルエンを含む。これらの列挙は、各群の化合物の例としてだけ役立ち、完全なものではない。
として更に使用するためには、PSAは100000−350000g/モルの平均分子量Mw(重量平均)を有するものが製造される。この場合、平均分子量Mwはサイズ排除クロマトグラフィ−(ゲルパ−ミエ−ションクロマトグラフィ−、GPC)または質量スペクトルと組み合わせたマトリックス支援レーザー脱着/イオン化法(MALDI−MS)で決定される。
assier)著、「光開始、光重合、及び光硬化−基礎と応用」、ハンザ−出版(Hanser Publisher,Munich,Vienna,New York)、1995年、及びP.K.T.オルドリング(Oldring)編、A.キャロイ(Carroy)、C.デッカ−(Decker)、J.P.ダウリング(Dowling)、P.パパス(Pappas)、B.モンロ−(Monroe)著、「コ−ティング、インキ、及び塗料のためのUV及びEB処方物の化学と技術」第5巻、SITA技術出版(SITA Technology Publ.,London)、1994年に見られる。
重合法(方法A)
重合は3つの直列のローラー筒からなるプラネタリーローラ−押出し機を反応器として用いて実行した。用いたローラー筒はローラー直径D=70mmを有し、7つのプラネタリ−スピンドルを備えていた。中央スピンドル及びローラー筒の両方は、別の温度制御回路を備えていた。使用した温度制御媒体は加圧水であった。重合では、反応器を連続的に運転した。秤入開始に先立って、反応器を1時間窒素でフラッシュした。モノマ−及び開始剤から混合物を作った。この最初の混合物を、窒素を通過させて不活性にした。ポンプを用いて、反応混合物を、更なる供給具を備えた静的混合機に送り、次いで熱交換器を通して反応器に輸送した。この反応混合物を第1のローラー筒の開始地点に開けた孔を通して反応器に連続的に添加した。反応器からの出口には、反応器の水圧充填を保証するバルブを位置した。供給物の予加熱、中央スピンドル、及びローラー筒に対する熱交換器は特別な望ましい温度に制御した。中央スピンドルの場合80℃に設定し、供給物の予加熱の媒体は90℃に設定した。ローラー筒1及び3は100℃に、ローラー筒2は2−95℃にした。中央スピンドルの速度は50回転/分であった。水力学的滞留時間は15分であった。反応器から出てきた後、試料を採取して転化率を計算した。続いて依然存在する揮発成分を脱揮発成分押出し機で除去した。
見本材料の製造(方法B)
2つの加熱できるロールを持つホットメルトコ−タ−を通して50g/m2の適用割合で、厚さ23μmのサラン下塗りのPETフィルム上にコ−ティングした。
UV照射(方法C)
エルトッシュ(Eltosch)からのUV装置を用いてUV照射した。この装置は強度120W/cmの中圧水銀ランプを備えていた。方法Bで製造した見本試料を、それぞれ20m/分の速度で装置を通した。試料は照射量を増加させるために複数回通過させた。UV投与量は、エルトッシュからのパワ−パック(Power Puck)で測定した
。1回の通過での照射量はUV−B範囲で約140mJ/cm2及びUV−C範囲で25mJ/cm2であった。
2、2´−ビス(フェニルエチル)チオカ−ボネ−トの製造
2、2´−ビス(フェニルエチル)チオカ−ボネ−トは、シント・コミュニケ−ションズ(Synth. Communications)、18(13)、1531−1536ページ(1988)の教示に従って2−フェニルエチルブロミド及び二硫化炭素と水酸化ナトリウムから合成した。蒸留後の収率:72%。
特性値:1H NMR(CDCl3)δ(ppm):7.20−7.40(m,10H)、1.53、1.59(2xd,6H)、3.71、3.81(2xm,2H)。
光開始剤
共重合しうる光開始剤はアクリル酸ベンゾインであった。
試験法
製造したポリマ−及びPSAの性質を評価するために、次の試験法を使用した。
転化率の決定(試験A)
転化率は重量により決定し、用いたモノマ−の重量に対するパーセントとして表わした。ポリマ−を単離するために、それを真空室で乾燥した。ポリマ−の重量を秤り、最初に使用したモノマ−重量で割った。計算値は転化率パーセントに相当する。
ゲルパ−ミエ−ションクロマトグラフィ−GPC(試験B)
平均分子量Mw及び多分散度PDはゲルパ−ミエ−ションクロマトグラフィ−で決定した。用いた展開液は、トリフルオロ酢酸0.1容量%を含むTHFであった。測定は25℃で行った。用いたプレカラムは、PSS−SDV、5μ、103オングストロ−ム、内径8.0mmx50mmであった。分離は、それぞれ内径8.0mmx300mmのPSS−SDV、5μ、103及び更に105及び106オングストロ−ムのかラムを用いて行った。試料濃度は4g/lであり、流速は1.0ml/分であった。測定はPMMA基準で行った。
ゲル画分の決定(試験C)
注意深く乾燥した接着剤の無溶媒試料を、ポリエチレンのウェッブポーチ[タイベク(Tyvek)不織布]中に融着させた。UV架橋後のゲル指数を決定するために、製造した見本試料のある規定された面積をポリエチレン・フロ−・ポーチ[タイベク不織布]中に融着させた。トルエンでの抽出前後の試料重量の差から、ゲル指数、即ちポリマ−のトルエン不溶重量画分を評価した。
剪断強度(試験D)
幅13mmの接着剤テープの細片を、アセトンで3回、更にイソプラパノ−ルで1回綺麗にした平滑なスチール表面に適用した。適用面積は20mmx13mm(長さx幅)であった。続いて接着剤テープを、重り2kgを用いて4回スチール支持体上に圧着させた。室温(RT)において、1kgの重りを接着剤テープに取り付け、重りが落下する時間を測定した。測定した保持力時間(HP)を分で報告する。これは3回の測定値の平均である。
180°接合強度試験(試験E)
ポリエステルに層として適用した幅20mmのアクリレ−トPSAの細片をスチール板に適用した。このPSA細片を、重り2kgを用いて基材に2回圧着した。続いて接着剤テープを、300mm/分で、また180°の角度ですぐに基材から剥離した。スチール板はアセトンで2回、更にイソプラパノ−ルで1回洗浄した。測定結果をN/cmで報告するが、これは3回の測定の平均値である。すべての測定は室温で行った。
実施例
ポリマ−を方法Aで製造した。アクリル酸5%、アクリル酸n−ブチル95%、及びアゾイソブチロニトリル(AIBN,バゾ64、デュポン社)0.015%を使用した。平均分子量と多分散度を試験Bにより、転化率を試験Aにより、そしてゲル指数を試験Cにより決定した。続いて見本試料を方法Bで製造し、方法CによりUV照射した。試料を試験C、D及びEで試験した。
ポリマ−を方法Aで製造した。アクリル酸4.5%、アクリル酸n−ブチル95%、アクリル酸ベンゾイン0.5%及び2、2´−ビス(フェニルエチル)チオカ−ボネ−ト0.124%、並びにアゾイソブチロニトリル(AIBN,バゾ64、デュポン社)0.015%を使用した。平均分子量と多分散度を試験Bにより、転化率を試験Aにより、そしてゲル指数を試験Cにより決定した。続いて見本試料を方法Bで製造した。
ポリマ−を方法Aで製造した。アクリル酸0.5%、アクリル酸n−ブチル49.5%、アクリル酸2−エチルヘキシル49.5%、アクリル酸ベンゾイン0.5%及び2、2´−ビス(フェニルエチル)チオカ−ボネ−ト0.124%、並びにアゾイソブチロニトリル(AIBN,バゾ64、デュポン社)0.015%を使用した。平均分子量と多分散度を試験Bにより、転化率を試験Aにより、そしてゲル指数を試験Cにより決定した。続いて見本試料を方法Bで製造し、方法CによりUV照射した。試料を試験C、D及びEで試験した。
結果
表1は、先ず重合結果を要約する。
PD:Mw/Mn=GPCからの多分散度
表2は、見本試料の架橋及び技術的接着剤評価の結果を示す。
RT:室温
BS:接合強度
実施例1は参照実施例である。本発明の方法に関しては、実施例2−3に示す。実施例2−3において、共重合された光開始剤及び低分子量を有するアクリレートPSAを製造した。調節剤を使用することにより、狭い分布の分子量分布を有するポリマ−を得た。
Claims (15)
- 共重合された光開始剤単位、
100000−3000000g/モルの平均分子量Mw(重量平均)、
フリーラジカル無溶媒重合で行われる製造操作、
で特徴づけられる、UV架橋性ポリアクリレ−ト感圧接着剤。 - 共重合された光開始剤単位、
100000−800000g/モルの平均分子量Mw(重量平均)、
高々4.0の多分散度、
フリーラジカル無溶媒重合で行われる製造操作、
で特徴づけられる、請求項1のUV架橋性ポリアクリレ−ト感圧接着剤。 - トリチオカ−ボネ−トまたはジチオエステルを重合調節剤として使用することで特徴づけられる、請求項1−3の少なくとも1つのポリアクリレ−ト感圧接着剤。
- モノマ−混合物が少なくとも次の成分、
式
CH2=CH(R1)(COOR2)
[式中、R1=HまたはCH3及びR2は炭素数1−30のアルキル鎖またはHである]
を有するアクリルエステル及び/またはメタクリルエステル及び/またはこれらの遊離酸68−99.9重量%、特に75−99.5重量%、
フリーラジカル重合しうる二重結合を有する共重合性UV光開始剤0.05−2重量%、特に0.4−1重量%、
を含むことで特徴づけられる、請求項1−4の少なくとも1つのポリアクリレ−ト感圧接着剤。 - モノマ−混合物が更に官能基を持つオレフィン性不飽和モノマ−を30重量%まで含むことで特徴づけられる、請求項5のポリアクリレ−ト感圧接着剤。
- 添加剤、例えば老化防止剤、光安定剤、オゾン保護剤、脂肪酸、可塑剤、核剤、膨張剤、促進剤及び/または充填剤が添加されたことで特徴づけられる、請求項1−6の少なくとも1つのポリアクリレ−ト感圧接着剤。
- 無溶媒重合を、プラネタリ−ロ−ラ−押出し機、好ましくは水圧充填式プラネタリ−ロ−ラ−押出し機中で行うことで特徴づけられる、請求項1−7の少なくとも1つのポリアクリレ−ト感圧接着剤の製造法。
- 重合を連続的に行うことで特徴づけられる、請求項8の方法。
- 反応器の押出し機部分の下流において、更なる物質、特に開始剤、モノマ−、共重合しうる光開始剤、及び重合調節剤を添加することができることで特徴づけられる、請求項8または9の方法。
- 重合操作に次いで脱揮発成分することで特徴づけられる、請求項8−10の少なくとも1つの方法。
- 重合及び適当ならば続く脱揮発成分後に、ポリマ−を特にゲルを含まない溶融物から担体上にコ−ティングすることで特徴づけられる、請求項8−11の少なくとも1つの方法。
- 特に担体へコ−ティングした後ポリマ−をUV照射で架橋させ、但し特にこのUV架橋を、添加された重合調節剤で補助することで特徴づけられる、請求項8−12の少なくとも1つの方法。
- 重合中及び/または前に、熱で分解するフリーラジカル生成開始剤、特にアゾ開始剤及び/またはパ−オキソ開始剤を添加することで特徴づけられる、請求項8−13の少なくとも1つの方法。
- 請求項1−7の少なくとも1つのポリアクリレ−ト感圧接着剤或いは請求項8−14の少なくとも1つの方法で製造されたポリアクリレ−ト感圧接着剤の、片面または両面感圧接着剤テープへの使用法。
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KR20140012674A (ko) * | 2011-03-18 | 2014-02-03 | 헨켈 아게 운트 코. 카게아아 | 가교성 광개시제 기를 함유하는 블록-공중합체 |
KR101899179B1 (ko) | 2011-03-18 | 2018-09-14 | 헨켈 아게 운트 코. 카게아아 | 가교성 광개시제 기를 함유하는 블록-공중합체 |
JP2016521222A (ja) * | 2013-04-26 | 2016-07-21 | スリーエム イノベイティブ プロパティズ カンパニー | 硬化接着剤シートを含む積層体の製造方法 |
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