WO2022215500A1 - アクリル系ブロック共重合体を含む樹脂組成物 - Google Patents
アクリル系ブロック共重合体を含む樹脂組成物 Download PDFInfo
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- WO2022215500A1 WO2022215500A1 PCT/JP2022/012831 JP2022012831W WO2022215500A1 WO 2022215500 A1 WO2022215500 A1 WO 2022215500A1 JP 2022012831 W JP2022012831 W JP 2022012831W WO 2022215500 A1 WO2022215500 A1 WO 2022215500A1
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- WIPO (PCT)
- Prior art keywords
- acrylic
- block copolymer
- resin composition
- polymer block
- mass
- Prior art date
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- 229920001400 block copolymer Polymers 0.000 title claims abstract description 178
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 title claims abstract description 174
- 239000011342 resin composition Substances 0.000 title claims abstract description 148
- 229920000642 polymer Polymers 0.000 claims abstract description 186
- 125000005396 acrylic acid ester group Chemical group 0.000 claims abstract description 37
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims abstract description 31
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims abstract description 31
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims abstract description 31
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- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims abstract description 31
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims abstract description 31
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims abstract description 31
- 125000005397 methacrylic acid ester group Chemical group 0.000 claims abstract description 13
- -1 acrylic ester Chemical class 0.000 claims description 76
- 238000012360 testing method Methods 0.000 claims description 26
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical group COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 claims description 20
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical group CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 20
- 238000007654 immersion Methods 0.000 claims description 20
- 238000000465 moulding Methods 0.000 claims description 18
- 125000004432 carbon atom Chemical group C* 0.000 claims description 13
- 125000000962 organic group Chemical group 0.000 claims description 13
- 230000008859 change Effects 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 5
- 238000012661 block copolymerization Methods 0.000 claims description 2
- 238000003860 storage Methods 0.000 claims description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 25
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- 239000000178 monomer Substances 0.000 description 63
- 238000000034 method Methods 0.000 description 58
- 239000010408 film Substances 0.000 description 45
- NIXOWILDQLNWCW-UHFFFAOYSA-M acrylate group Chemical group C(C=C)(=O)[O-] NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 42
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 36
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- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical group COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 29
- 239000000243 solution Substances 0.000 description 28
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- 239000000203 mixture Substances 0.000 description 26
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- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 18
- 239000000853 adhesive Substances 0.000 description 18
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- 239000000123 paper Substances 0.000 description 17
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- WGOPGODQLGJZGL-UHFFFAOYSA-N lithium;butane Chemical compound [Li+].CC[CH-]C WGOPGODQLGJZGL-UHFFFAOYSA-N 0.000 description 13
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- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 11
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 11
- 239000003795 chemical substances by application Substances 0.000 description 11
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- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 11
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- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 9
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- 229920000428 triblock copolymer Polymers 0.000 description 7
- OZJPLYNZGCXSJM-UHFFFAOYSA-N 5-valerolactone Chemical compound O=C1CCCCO1 OZJPLYNZGCXSJM-UHFFFAOYSA-N 0.000 description 6
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- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 6
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 6
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 5
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 5
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- 238000004821 distillation Methods 0.000 description 1
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- 239000007789 gas Substances 0.000 description 1
- 239000011086 glassine Substances 0.000 description 1
- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 description 1
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- 239000012760 heat stabilizer Substances 0.000 description 1
- LNCPIMCVTKXXOY-UHFFFAOYSA-N hexyl 2-methylprop-2-enoate Chemical compound CCCCCCOC(=O)C(C)=C LNCPIMCVTKXXOY-UHFFFAOYSA-N 0.000 description 1
- LNMQRPPRQDGUDR-UHFFFAOYSA-N hexyl prop-2-enoate Chemical compound CCCCCCOC(=O)C=C LNMQRPPRQDGUDR-UHFFFAOYSA-N 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
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- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
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- PBOSTUDLECTMNL-UHFFFAOYSA-N lauryl acrylate Chemical compound CCCCCCCCCCCCOC(=O)C=C PBOSTUDLECTMNL-UHFFFAOYSA-N 0.000 description 1
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- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- 239000000944 linseed oil Substances 0.000 description 1
- 235000021388 linseed oil Nutrition 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- AFRJJFRNGGLMDW-UHFFFAOYSA-N lithium amide Chemical class [Li+].[NH2-] AFRJJFRNGGLMDW-UHFFFAOYSA-N 0.000 description 1
- 150000002642 lithium compounds Chemical class 0.000 description 1
- JILPJDVXYVTZDQ-UHFFFAOYSA-N lithium methoxide Chemical compound [Li+].[O-]C JILPJDVXYVTZDQ-UHFFFAOYSA-N 0.000 description 1
- YNXURHRFIMQACJ-UHFFFAOYSA-N lithium;methanidylbenzene Chemical compound [Li+].[CH2-]C1=CC=CC=C1 YNXURHRFIMQACJ-UHFFFAOYSA-N 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 229920001179 medium density polyethylene Polymers 0.000 description 1
- 239000004701 medium-density polyethylene Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 210000002200 mouth mucosa Anatomy 0.000 description 1
- DWFKOMDBEKIATP-UHFFFAOYSA-N n'-[2-[2-(dimethylamino)ethyl-methylamino]ethyl]-n,n,n'-trimethylethane-1,2-diamine Chemical compound CN(C)CCN(C)CCN(C)CCN(C)C DWFKOMDBEKIATP-UHFFFAOYSA-N 0.000 description 1
- 239000000025 natural resin Substances 0.000 description 1
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical class OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 1
- HMZGPNHSPWNGEP-UHFFFAOYSA-N octadecyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)C(C)=C HMZGPNHSPWNGEP-UHFFFAOYSA-N 0.000 description 1
- NZIDBRBFGPQCRY-UHFFFAOYSA-N octyl 2-methylprop-2-enoate Chemical compound CCCCCCCCOC(=O)C(C)=C NZIDBRBFGPQCRY-UHFFFAOYSA-N 0.000 description 1
- ANISOHQJBAQUQP-UHFFFAOYSA-N octyl prop-2-enoate Chemical compound CCCCCCCCOC(=O)C=C ANISOHQJBAQUQP-UHFFFAOYSA-N 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- 229920006285 olefinic elastomer Polymers 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 150000002900 organolithium compounds Chemical class 0.000 description 1
- RPQRDASANLAFCM-UHFFFAOYSA-N oxiran-2-ylmethyl prop-2-enoate Chemical compound C=CC(=O)OCC1CO1 RPQRDASANLAFCM-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- UKODFQOELJFMII-UHFFFAOYSA-N pentamethyldiethylenetriamine Chemical compound CN(C)CCN(C)CCN(C)C UKODFQOELJFMII-UHFFFAOYSA-N 0.000 description 1
- ULDDEWDFUNBUCM-UHFFFAOYSA-N pentyl prop-2-enoate Chemical compound CCCCCOC(=O)C=C ULDDEWDFUNBUCM-UHFFFAOYSA-N 0.000 description 1
- 239000002530 phenolic antioxidant Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- QIWKUEJZZCOPFV-UHFFFAOYSA-N phenyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC1=CC=CC=C1 QIWKUEJZZCOPFV-UHFFFAOYSA-N 0.000 description 1
- WRAQQYDMVSCOTE-UHFFFAOYSA-N phenyl prop-2-enoate Chemical compound C=CC(=O)OC1=CC=CC=C1 WRAQQYDMVSCOTE-UHFFFAOYSA-N 0.000 description 1
- NHKJPPKXDNZFBJ-UHFFFAOYSA-N phenyllithium Chemical compound [Li]C1=CC=CC=C1 NHKJPPKXDNZFBJ-UHFFFAOYSA-N 0.000 description 1
- AQSJGOWTSHOLKH-UHFFFAOYSA-N phosphite(3-) Chemical class [O-]P([O-])[O-] AQSJGOWTSHOLKH-UHFFFAOYSA-N 0.000 description 1
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- 229910052698 phosphorus Inorganic materials 0.000 description 1
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- 125000005498 phthalate group Chemical class 0.000 description 1
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- 239000004814 polyurethane Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
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- 238000003672 processing method Methods 0.000 description 1
- LYBIZMNPXTXVMV-UHFFFAOYSA-N propan-2-yl prop-2-enoate Chemical group CC(C)OC(=O)C=C LYBIZMNPXTXVMV-UHFFFAOYSA-N 0.000 description 1
- PNXMTCDJUBJHQJ-UHFFFAOYSA-N propyl prop-2-enoate Chemical group CCCOC(=O)C=C PNXMTCDJUBJHQJ-UHFFFAOYSA-N 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- GRWFGVWFFZKLTI-UHFFFAOYSA-N rac-alpha-Pinene Natural products CC1=CCC2C(C)(C)C1C2 GRWFGVWFFZKLTI-UHFFFAOYSA-N 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
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- 238000005096 rolling process Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229930195734 saturated hydrocarbon Natural products 0.000 description 1
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical class OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000003549 soybean oil Substances 0.000 description 1
- 235000012424 soybean oil Nutrition 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
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- 239000003381 stabilizer Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 description 1
- 150000003440 styrenes Chemical class 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 125000005415 substituted alkoxy group Chemical group 0.000 description 1
- 125000000547 substituted alkyl group Chemical group 0.000 description 1
- 125000003107 substituted aryl group Chemical group 0.000 description 1
- 125000005346 substituted cycloalkyl group Chemical group 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 239000003784 tall oil Substances 0.000 description 1
- MUTNCGKQJGXKEM-UHFFFAOYSA-N tamibarotene Chemical group C=1C=C2C(C)(C)CCC(C)(C)C2=CC=1NC(=O)C1=CC=C(C(O)=O)C=C1 MUTNCGKQJGXKEM-UHFFFAOYSA-N 0.000 description 1
- SJMYWORNLPSJQO-UHFFFAOYSA-N tert-butyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC(C)(C)C SJMYWORNLPSJQO-UHFFFAOYSA-N 0.000 description 1
- ISXSCDLOGDJUNJ-UHFFFAOYSA-N tert-butyl prop-2-enoate Chemical compound CC(C)(C)OC(=O)C=C ISXSCDLOGDJUNJ-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- KEROTHRUZYBWCY-UHFFFAOYSA-N tridecyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCCCCCOC(=O)C(C)=C KEROTHRUZYBWCY-UHFFFAOYSA-N 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F297/00—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer
- C08F297/02—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the anionic type
- C08F297/026—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the anionic type polymerising acrylic acid, methacrylic acid or derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
Definitions
- the present invention relates to a resin composition containing an acrylic block copolymer.
- a resin composition containing an acrylic block copolymer having a polymer block containing an acrylic ester unit and a polymer block containing a methacrylic ester unit is used in various applications such as adhesives and soft materials due to its properties. is being considered for use in Among the above acrylic block copolymers, acrylic block copolymers containing an acrylic ester unit having an organic group having 1 to 3 carbon atoms in a polymer block containing an acrylic ester unit are resistant to plasticizers. Because of its excellent properties, for example, a laminate with a vinyl chloride resin or the like is being studied (for example, Patent Document 1).
- a resin composition containing an acrylic block copolymer when used as an adhesive or a soft material, it may be used in an environment where it comes into contact with the skin such as hands. When used in such an environment where the skin comes into contact with the skin, the resin composition may be contaminated with sebum, resulting in deterioration of physical properties of the resin composition.
- Oleic acid one of the main substances that make up sebum, is a low-molecular-weight organic compound similar to the plasticizer used in vinyl chloride, so it contains the acrylic block copolymer disclosed in Patent Document 1.
- the use of the resin composition is expected to solve the problem of contamination of the resin composition with sebum.
- an object of the present invention is to provide a resin composition containing an acrylic block copolymer that sufficiently suppresses contamination by substances contained in sebum, particularly oleic acid, and maintains flexibility.
- a polymer block containing an acrylate ester unit contains an acrylate unit having an organic group having 1 to 3 carbon atoms.
- the above objects are [1] 100 parts by mass of an acrylic block copolymer (I) having at least one polymer block (A1) containing a methacrylate ester unit and at least one polymer block (B1) containing an acrylic ester unit and an acrylic block copolymer (II) having at least one polymer block (A2) containing a methyl methacrylate unit and at least one polymer block (B2) containing an acrylic ester unit 15 to 400 mass
- a resin composition containing a part The content of the polymer block (A1) in the acrylic block copolymer (I) is 20% by mass or more,
- the polymer block (B1) of the acrylic block copolymer (I) has the general formula CH 2 ⁇ CH—COOR 1 (1) (in formula (1), R 1 represents an organic group having 1 to 3 carbon atoms).
- the acrylic block copolymer satisfies the following formulas (i) and (ii), (i) (H) x SP (A1) + (J) x SP (B1) - SP (C) > 1.20 (ii) ⁇ 0.80 ⁇ SP(A1) ⁇ SP(B1) ⁇ 0.43 (In the above formulas (i) and (ii), SP (A1) is the solubility parameter (cal/cm 3 ) 1/2 of the polymer block (A1), SP (B1) is the solubility parameter of the polymer block (B1), (cal/cm 3 ) 1/2 , SP (C) represents the solubility parameter (cal/cm 3 ) 1/2 of oleic acid, and (H) represents the acrylic block copolymerization of the polymer block (A1).
- the polymer block (B2) of the acrylic block copolymer (II) has the general formula CH 2 ⁇ CH—COOR 2 (2) (in formula (2), R 2 represents an organic group having 4 to 12 carbon atoms). and the content of the polymer block (A2) in the acrylic block copolymer (II) is less than 35% by mass.
- the resin composition of the present invention can sufficiently suppress contamination by substances contained in sebum, particularly oleic acid, and maintain flexibility.
- (meth)acrylic acid ester is a generic term for "methacrylic acid ester” and “acrylic acid ester”
- (meth)acrylic is a combination of “methacrylic” and “acrylic”. It is a generic term.
- the acrylic block copolymer (I) contained in the resin composition of the present invention comprises at least one polymer block (A1) containing methacrylate units and at least one polymer containing acrylic ester units.
- block (B1), and the acrylic acid ester unit contained in the polymer block (B1) is represented by the general formula CH 2 ⁇ CH—COOR 1 (1) (in formula (1), R 1 has 1 to Representing an organic group of 3) contains an acrylic acid ester (b1-1) unit.
- methacrylic acid esters that are constituent units of the polymer block (A1) include methyl methacrylate, ethyl methacrylate, propyl methacrylate, n-butyl methacrylate, t-butyl methacrylate, n-hexyl methacrylate, Alkyl methacrylates such as cyclohexyl methacrylate, 2-ethylhexyl methacrylate, n-octyl methacrylate, lauryl methacrylate, tridecyl methacrylate, stearyl methacrylate and isobornyl methacrylate; Methacrylic acid esters having no functional groups other than alkyl methacrylates such as phenyl methacrylate and benzyl methacrylate; Methoxyethyl methacrylate, methacrylic acid alkoxyalkyl esters such as ethoxyethyl methacrylate, diethylaminoethyl
- alkyl methacrylate is preferred, and methyl methacrylate, ethyl methacrylate, and propyl methacrylate are more preferred, because they are economically available and the resulting polymer block (A1) has excellent durability and weather resistance. etc., methyl methacrylate is more preferable.
- the methacrylic acid ester unit of the polymer block (A1) may be obtained from only one type of methacrylic acid ester, or may be obtained from two or more types of methacrylic acid ester.
- the proportion of methacrylate units contained in the polymer block (A1) is preferably 60% by mass or more, more preferably 80% by mass or more, and even more preferably 90% by mass or more in the polymer block (A1).
- the polymer block (A1) may be composed of 100% by mass of methacrylic acid ester units, that is, composed only of methacrylic acid ester units.
- the polymer block (A1) may contain other monomer units within a range that does not impair the effects of the present invention.
- Such other monomers include, for example, acrylic acid esters; (meth) acrylic acid, crotonic acid, maleic acid, maleic anhydride, vinyl monomers having a carboxyl group such as fumaric acid; (meth) acrylamide, Vinyl monomers having functional groups such as (meth)acrylonitrile, vinyl acetate, vinyl chloride and vinylidene chloride; Aromatic vinyl monomers such as styrene, ⁇ -methylstyrene, p-methylstyrene and m-methylstyrene conjugated diene-based monomers such as butadiene and isoprene; olefin-based monomers such as ethylene, propylene, isobutene and octene; and lactone-based monomers such as ⁇ -caprolactone and valerolactone.
- Monomer units composed of these other monomers are usually in small amounts with respect to the total monomer units of the polymer block (A1), and other monomers contained in the polymer block (A1)
- the proportion of body units is preferably 40% by mass or less, more preferably 20% by mass or less, and even more preferably 10% by mass or less.
- the glass transition temperature (Tg) of the polymer block (A1) is preferably 50 to 150°C, more preferably 60 to 140°C, even more preferably 70 to 130°C.
- the polymer block (A1) acts as a physical pseudo cross-linking point at the normal operating temperature of the resin composition of the present invention, A cohesive force is expressed in the composition, and the adhesive properties, durability, and heat resistance are excellent, and the hot-melt moldability is excellent.
- the glass transition temperature is the extrapolation start temperature of the curve obtained by DSC measurement.
- the acrylic block copolymer (I) may contain two or more polymer blocks (A1). In that case, the methacrylate ester units constituting the polymer blocks (A1) and The monomers can be the same or different.
- the weight average molecular weight (Mw) of the polymer block (A1) is not particularly limited, it is preferably in the range of 1,000 to 50,000, more preferably in the range of 4,000 to 20,000. .
- the Mw of the polymer block (A1) is 1,000 or more, the resulting acrylic block copolymer (I) tends to have a cohesive force.
- the Mw of the polymer block (A1) is 50,000 or less, the melt viscosity of the obtained acrylic block copolymer (I) does not become too high, and the acrylic block copolymer (I) and the moldability of the resulting resin composition containing the acrylic block copolymer (I).
- the weight average molecular weight (Mw) in this specification means the weight average molecular weight of standard polystyrene conversion measured by the gel permeation chromatography (GPC) method.
- the polymer block (B1) contains acrylic acid ester units, and the acrylic acid ester units contained in the polymer block (B1) are represented by the general formula CH 2 ⁇ CH—COOR 1 (1) (in formula (1) , R 1 represents an organic group having 1 to 3 carbon atoms) (hereinafter simply referred to as acrylate (b1-1)) units.
- acrylic acid ester (b1-1) examples include acrylic acid esters having no functional groups such as methyl acrylate, ethyl acrylate, isopropyl acrylate, and n-propyl acrylate; 2-methoxyethyl acrylate, acrylic Acrylic acid esters having functional groups such as 2-hydroxyethyl acid, 2-aminoethyl acrylate, glycidyl acrylate, and the like can be mentioned.
- acrylic acid esters having no functional group are preferred, and methyl acrylate and ethyl acrylate are more preferred, from the viewpoint of increasing the stain resistance of the resulting resin composition against substances contained in sebum such as oleic acid. , and methyl acrylate are more preferred.
- acrylic acid esters (b1-1) may be used alone or in combination of two or more.
- acrylic ester (b1-1) units In addition to the acrylic ester (b1-1) units, the acrylic ester units constituting the polymer block (B1) have the general formula CH 2 ⁇ CH—COOR 2 (2) (wherein R 2 is the number of carbon atoms Representing 4 to 12 organic groups) (hereinafter simply referred to as acrylic ester (b1-2)) units are preferably contained.
- acrylic acid ester (b1-2) examples include n-butyl acrylate, isobutyl acrylate, sec-butyl acrylate, tert-butyl acrylate, amyl acrylate, isoamyl acrylate, n-hexyl acrylate, acrylic acrylic acid esters having no functional group such as 2-ethylhexyl acid, n-octyl acrylate, isooctyl acrylate, decyl acrylate, isobornyl acrylate, lauryl acrylate, cyclohexyl acrylate, phenyl acrylate, benzyl acrylate; Acrylic acid esters having functional groups such as 2-ethoxyethyl acrylate, 2-(diethylamino)ethyl acrylate, tetrahydrofurfuryl acrylate, and 2-phenoxyethyl acrylate can be mentioned.
- acrylic acid esters having no functional group are preferable because the phase separation between the polymer block (A1) and the polymer block (B1) becomes clearer. is more preferred, and n-butyl acrylate and 2-ethylhexyl acrylate are even more preferred.
- the flexibility and adhesive properties of the obtained resin composition at low temperatures 40 to 10 ° C.
- n-Butyl acrylate is more preferable from the viewpoint of excellent (tackiness, adhesion, etc.) and excellent durability.
- These acrylic acid esters (b1-2) may be used alone or in combination of two or more.
- the mass ratio (b1-1)/(b1-2) of the acrylic ester (b1-1) unit and the acrylic ester (b1-2) unit in the polymer block (B1) is 90/10 to 10/90. is preferably When the mass ratio is within the above range, stain resistance to substances contained in sebum such as oleic acid due to the acrylic ester (b1-1) unit and softness due to the acrylic ester (b1-2) unit Excellent compatibility with sexuality.
- the mass ratio (b1-1)/(b1-2) of the acrylic acid ester is 85/15 to 10/ It is preferably 90, more preferably 80/20 to 10/90, even more preferably 80/20 to 20/80.
- the mass ratio of the acrylic acid ester (b1-1) unit and the acrylic acid ester (b1-2) unit can be determined by 1 H-NMR measurement.
- the proportion of the acrylate (b1-1) units in the acrylate units of the polymer block (B1) is preferably 90% by mass or less, and 85% by mass or less in the polymer block (B1). and more preferably 80% by mass or less.
- the acrylic ester units contained in the polymer block (B1) consist of only acrylic ester (b1-1) units and acrylic ester (b1-2) units.
- the proportion of acrylic acid ester units in the polymer block (B1) is preferably 60% by mass or more, more preferably 80% by mass or more, and even more preferably 90% by mass or more.
- the polymer block (B1) is preferably composed of 100% by mass of acrylate units, that is, composed only of acrylate units.
- the polymer block (B1) may contain monomer units other than acrylic acid ester units within a range that does not impair the effects of the present invention.
- Other monomers constituting such units include, for example, methacrylic acid esters; (meth)acrylic acid, crotonic acid, maleic acid, maleic anhydride, fumaric acid and other vinyl monomers having a carboxyl group; ) Vinyl monomers having functional groups such as acrylamide, (meth)acrylonitrile, vinyl acetate, vinyl chloride and vinylidene chloride; Aromatic vinyls such as styrene, ⁇ -methylstyrene, p-methylstyrene and m-methylstyrene conjugated diene monomers such as butadiene and isoprene; olefin monomers such as ethylene, propylene, isobutene and octene; and lactone monomers such as ⁇ -caprolactone and valerolactone.
- Monomer units composed of these other monomers are usually in small amounts with respect to the total monomer units of the polymer block (B1), and other monomers contained in the polymer block (B1)
- the proportion of body units is preferably 40% by mass or less, more preferably 20% by mass or less, and even more preferably 10% by mass or less.
- acrylic block copolymer (I) may contain two or more polymer blocks (B1).
- the combinations may be the same or different.
- the acrylic ester unit portion contained in the polymer block (B1) contains acrylic ester (b1-1) units and acrylic ester (b1-2) units
- the portion is It is composed of a copolymer of acrylic acid ester (b1-1) and acrylic acid ester (b1-2).
- the form of the copolymer may consist of a random copolymer, a block copolymer, or a graft copolymer of the acrylic acid ester (b1-1) and the acrylic acid ester (b1-2).
- a tapered block copolymer may be used, but a random copolymer is preferred.
- the acrylic block copolymer (I) contains two or more polymer blocks (B1)
- the polymer blocks (B1) may have the same or different structures.
- the glass transition temperature (Tg) of the polymer block (B1) is more preferably -50 to 55°C, more preferably -50 to 50°C, and further preferably -50 to 45°C. It is preferably -50 to 25°C, and more preferably -50°C to 25°C. When the glass transition temperature is within this range, there is a tendency to easily obtain a resin composition that is excellent in flexibility and durability at the temperature of use.
- the difference in glass transition temperature between the polymer block (A1) and the polymer block (B1) in the acrylic block copolymer (I) is preferably 50°C or higher, more preferably 70°C or higher.
- the acrylic block copolymer (I) has the general formula: when the polymer block (A1) is "A1"; (A1-B1) n (A1-B1) n -A1 A1-(A1-B1) n (A1-B1) n -Z (B1-A1) n -Z (Wherein, n is an integer of 1 to 30, Z represents a coupling site (coupling site after the coupling agent reacts with the polymer terminal to form a chemical bond)) is preferred.
- the value of n is preferably 1-15, more preferably 1-8, and even more preferably 1-4.
- the polymer block (A1) is bonded to both ends of the polymer block (B1).
- the following general formula: (A1-B1) n -A1 (A1-B1) m -Z (Wherein, n is an integer of 1 to 30, m is an integer of 2 to 30, Z represents a coupling site (coupling site after the coupling agent reacts with the polymer terminal to form a chemical bond) ) is preferably represented by The value of m is preferably 2-15, more preferably 2-8, even more preferably 2-4. The value of n is preferably 1-15, more preferably 1-8, and even more preferably 1-4. )
- linear block copolymers represented by (A1-B1) n , (A1-B1) n -A1, A1-(A1-B1) n are more preferable, represented by A1-B1
- a diblock copolymer represented by A1-B1-A1 and a triblock copolymer represented by A1-B1-A1 are more preferable, and a triblock copolymer represented by A1-B1-A1 is particularly preferable.
- These may be used individually by 1 type, and may be used in combination of 2 or more types.
- the content of the polymer block (A1) in the acrylic block copolymer (I) is 20% by mass or more, preferably 20 to 40% by mass.
- the content of the polymer block (A1) is 20% by mass or more, the cohesive force of the acrylic block copolymer (I) tends to increase, and the acrylic block copolymer (I) and the acrylic block described later
- a resin composition is produced from the copolymer (II)
- the content of the polymer block (A1) is 40% by mass or less, a resin composition with excellent flexibility tends to be obtained.
- the content of the polymer block (A1) in the acrylic block copolymer (I) is preferably 20 to 35% by mass, more preferably 25 to 31% by mass, from the viewpoint of obtaining a resin composition having excellent flexibility. is more preferable.
- the acrylic block copolymer (I) of the present invention must satisfy the following formulas (i) and (ii).
- SP (A1) is the solubility parameter (cal/cm 3 ) 1/2 of the polymer block (A1)
- SP (B1) is the solubility parameter of the polymer block (B1) ( cal/cm 3 ) 1/2
- SP (C) represents the solubility parameter (cal/cm 3 ) 1/2 of oleic acid
- (H) represents the acrylic block copolymer of the polymer block (A1).
- the mass ratio in (I) and (J) indicate the mass ratio of the polymer block (B1) in the acrylic block copolymer (I).
- the solubility parameter of each polymer block (A1) and (B1) is a value obtained by the Fedors estimation method.
- the solubility parameter (SP value ( ⁇ )) is defined as the square root of the cohesive energy density ( ⁇ E/V) calculated from the cohesive energy ( ⁇ E) and the molar molecular volume (V) of the solvent.
- Polymethyl acrylate (methyl acrylate units), poly n-butyl acrylate (n-butyl acrylate units), poly 2-ethylhexyl acrylate (2-ethylhexyl acrylate units) and poly methyl methacrylate (methyl methacrylate units ) are 11.30 (cal/cm 3 ) 1/2 , 10.20 (cal/cm 3 ) 1/2 and 9.50 (cal/cm 3 ) 1 , respectively. /2 and 10.50 (cal/cm 3 ) 1/2 . Also, SP(C) is 9.14 (cal/cm 3 ) 1/2 .
- the acrylic block copolymer (I) that satisfies the above formula (i) includes, for example, the ratio of the acrylic ester (b1-1) units in the acrylic ester units of the polymer block (B1), the polymer block (A1 ) can be obtained by adjusting the content of
- Equation (ii) The value of SP (A1) - SP (B1) in the above formula (ii) is the difference in solubility parameters between the polymer blocks (A1) and (B1) in the acrylic block copolymer (I), Equation (ii) shows that it is important that this difference be within a certain range. Since the difference in the solubility parameter is within a specific range, not only can it exhibit sufficient flexibility even when used in combination with the acrylic block copolymer (II) described later, but it can also be contained in sebum such as oleic acid.
- the acrylic block copolymer (I) that satisfies the above formula (ii) has, for example, a content of the acrylic ester (b1-1) unit in the acrylic ester unit of the polymer block (B1). Alternatively, it can be obtained by adjusting the content of the polymer block (A1).
- Mw of the acrylic block copolymer (I) is 30,000 to 300, 000, more preferably 40,000 to 250,000, even more preferably 50,000 to 220,000, even more preferably 60,000 to 200,000.
- Mw of the acrylic block copolymer (I) is 30,000 or more, the cohesive force of the acrylic block copolymer (I) increases, and the durability of the obtained resin composition tends to be more excellent.
- problems such as bleeding originating from the acrylic block copolymer (I) are less likely to occur on the surface of the molded article.
- the productivity and workability tend to be excellent.
- the compatibility with the acrylic block copolymer (II) described later tends to be good, and the transparency of the resin composition obtained tends to be more excellent, and the molded article produced from the resin composition Physical properties tend to be more stable.
- the acrylic block copolymer (I) preferably has a molecular weight distribution (Mw/Mn) of 1.0 to 1.5.
- Mw/Mn molecular weight distribution
- the molecular weight distribution of the acrylic block copolymer (I) is within the above range, the cohesive force of the acrylic block copolymer (I) can be easily increased, and mold contamination during molding of the obtained pellets can be suppressed. tends to be easy.
- the molecular weight distribution is more preferably 1.0 to 1.4, even more preferably 1.0 to 1.3.
- Mn means a number average molecular weight
- Mn number average molecular weight
- GPC gel permeation chromatography
- the acrylic block copolymer (II) contained in the resin composition of the present invention is a polymer different from the acrylic block copolymer (I) and has at least one polymer block containing a methyl methacrylate unit. (A2) and at least one polymer block (B2) containing an acrylate unit, the polymer block (B2) having the general formula CH 2 ⁇ CH—COOR 2 (2) (formula (2) in which R 2 represents an organic group having 4 to 12 carbon atoms), and the polymer block (A2) in the acrylic block copolymer (II) is less than 35% by mass.
- the acrylic block copolymer (II) in addition to the acrylic block copolymer (I) in the resin composition of the present invention, contamination by substances contained in sebum, particularly oleic acid, is sufficiently suppressed. It is possible to obtain a resin composition that not only can be used for sintering, but also has excellent flexibility.
- the proportion of the methyl methacrylate unit contained in the polymer block (A2) is preferably 60% by mass or more, more preferably 80% by mass or more, and even more preferably 90% by mass or more in the polymer block (A2). Further, the polymer block (A2) is also preferably composed of 100% by mass of methyl methacrylate units, that is, composed only of methyl methacrylate units.
- the polymer block (A2) may contain monomer units other than methyl methacrylate as long as the effects of the present invention are not impaired.
- monomers include methacrylic acid esters other than methyl methacrylate, acrylic acid esters; (meth)acrylic acid, crotonic acid, maleic acid, maleic anhydride, fumaric acid, etc.
- Monomer vinyl-based monomer having a functional group such as (meth)acrylamide, (meth)acrylonitrile, vinyl acetate, vinyl chloride, vinylidene chloride; styrene, ⁇ -methylstyrene, p-methylstyrene, m-methyl Aromatic vinyl monomers such as styrene; Conjugated diene monomers such as butadiene and isoprene; Olefin monomers such as ethylene, propylene, isobutene and octene; Lactone monomers such as ⁇ -caprolactone and valerolactone A body etc. are mentioned.
- Monomer units composed of these other monomers are usually a small amount with respect to the total monomer units of the polymer block (A2), and other monomers contained in the polymer block (A2)
- the proportion of body units is preferably 40% by mass or less, more preferably 20% by mass or less, and even more preferably 10% by mass or less.
- the glass transition temperature (Tg) of the polymer block (A2) is preferably 50 to 150°C, more preferably 70 to 140°C, even more preferably 80 to 130°C.
- Tg glass transition temperature
- the glass transition temperature of the polymer block (A2) is within the above range, there is a tendency that when stored as pellets, stickiness at high temperatures (for example, 50° C.) is reduced (stickiness resistance is improved).
- the acrylic block copolymer (II) may contain two or more polymer blocks (A2).
- methyl methacrylate units constituting the polymer blocks (A2) and other The monomers can be the same or different.
- Mw of the polymer block (A2) is not particularly limited, it is preferably in the range of 1,000 to 50,000, more preferably in the range of 4,000 to 20,000. If the Mw of the polymer block (A2) is less than 1,000, the resulting acrylic block copolymer (II) may lack cohesion. Further, when the Mw of the polymer block (A2) is more than 50,000, the melt viscosity of the obtained acrylic block copolymer (II) increases, and the productivity of the acrylic block copolymer (II) increases. Otherwise, the moldability of pellets containing the obtained resin composition may be inferior.
- the polymer block (B2) contains acrylic acid ester units, and the acrylic acid ester units contained in the polymer block (B2) are represented by the general formula CH 2 ⁇ CH—COOR 2 (2) (wherein R 2 represents an organic group having 4 to 12 carbon atoms) (hereinafter simply referred to as acrylate (b2-2)) units.
- acrylic ester (b2-2) are the same as the acrylic ester (b1-2) that can be one of the constituent units of the polymer block (B1) of the acrylic block copolymer (I).
- acrylic acid esters (b2-2) acrylic acid esters having no functional group are preferable because the phase separation between the polymer block (A2) and the polymer block (B2) becomes clearer.
- Alkyl acrylates having 4 to 12 alkyl groups are more preferred, and n-butyl acrylate and 2-ethylhexyl acrylate are even more preferred. Further, n-butyl acrylate is more preferable because the resin composition of the present invention tends to be more flexible and a resin composition having excellent durability tends to be obtained.
- the acrylic ester (b2-2) units constituting the acrylic ester units contained in the polymer block (B2) may be obtained from only one type of acrylic ester (b2-2). , two or more acrylic acid esters (b2-2).
- the proportion of acrylic acid ester units contained in the polymer block (B2) is preferably 60% by mass or more, more preferably 80% by mass or more, and even more preferably 90% by mass or more in the polymer block (B2). Further, the polymer block (B2) may be composed of 100% by mass of acrylate units, that is, composed only of acrylate units.
- the acrylate unit contained in the polymer block (B2) has the general formula CH 2 ⁇ CH—COOR 1 (1) (wherein R 1 represents an organic group having 1 to 3 carbon atoms). It is a preferred form that the acrylate (b2-1) represented by (hereinafter simply referred to as acrylate (b2-1)) unit is not included.
- Specific examples of the acrylic acid ester (b2-1) are the same as the acrylic acid ester (b1-1) constituting the polymer block (B1) of the acrylic block copolymer (I). Since the acrylic acid ester (b2-1) unit is not contained in the polymer block (B2), a resin composition having excellent flexibility can be obtained.
- the acrylic ester unit contained in the polymer block (B2) is composed only of the acrylic ester (b2-2) unit.
- the acrylic ester units of the polymer block (B2) consist only of acrylic ester (b2-2) units, a resin composition having excellent flexibility can be obtained.
- the polymer block (B2) may contain monomer units other than acrylic acid ester units within a range that does not impair the effects of the present invention. Specific examples of such other monomers are the same as other monomers that can be a constituent unit of the polymer block (B1) of the acrylic block copolymer (I). Monomer units composed of these other monomers are usually a small amount with respect to the total monomer units of the polymer block (B2), and other monomers contained in the polymer block (B2) The proportion of body units is preferably 40% by mass or less, more preferably 20% by mass or less, and even more preferably 10% by mass or less.
- the glass transition temperature of the polymer block (B2) is preferably -100 to 40°C, more preferably -80 to 35°C, even more preferably -70 to 30°C.
- the flexibility is excellent even in a low temperature range.
- n-butyl acrylate, 2-ethylhexyl acrylate, n- Octyl is preferred.
- acrylic block copolymer (II) may contain two or more polymer blocks (B2).
- the combinations may be the same or different.
- the difference in glass transition temperature between the polymer block (A2) and the polymer block (B2) in the acrylic block copolymer (II) is preferably 70°C or higher, more preferably 100°C or higher.
- the acrylic block copolymer (II) has the general formula: when the polymer block (A2) is "A2"; (A2-B2) i (A2-B2) i -A2 A2-(A2-B2) i (A2-B2) i -Z (B2-A2) i -Z (Wherein, i is an integer of 1 to 30, Z is a coupling site (coupling site after the coupling agent reacts with the polymer terminal to form a chemical bond)). is preferred.
- the value of i is preferably 1-15, more preferably 1-8, and even more preferably 1-4.
- the polymer block (A2) is bonded to both ends of the polymer block (B2).
- the following general formula: (A2-B2) i -A2 (A2-B2) k -Z (Wherein, i is an integer of 1 to 30, k is an integer of 2 to 30, Z represents a coupling site (coupling site after the coupling agent reacts with the polymer end to form a chemical bond) ) is preferably represented by The value of k is preferably 2-15, more preferably 2-8, even more preferably 2-4. The value of i is preferably 1-15, more preferably 1-8, and even more preferably 1-4. )
- linear block copolymers represented by (A2-B2) i , (A2-B2) i -A2, and A2-(A2-B2) i are more preferable, represented by A2-B2
- a diblock copolymer represented by A2-B2-A2 and a triblock copolymer represented by A2-B2-A2 are more preferable, and a triblock copolymer represented by A2-B2-A2 is particularly preferable.
- These may be used individually by 1 type, and may be used in combination of 2 or more types.
- the content of the polymer block (A2) in the acrylic block copolymer (II) is less than 35% by mass.
- the acrylic block copolymer (II) becomes flexible, and the resin composition obtained by mixing with the acrylic block copolymer (I). flexibility.
- the content of the polymer block (A2) in the acrylic block copolymer (II) is preferably less than 33% by mass, more preferably 32% by mass, because a resin composition having excellent flexibility can be obtained more easily. It is more preferably less than.
- the content of the polymer block (A2) is preferably 3% by mass or more.
- the Mw of the acrylic block copolymer (II) is 30,000 to 300,000. preferably 30,000 to 200,000, even more preferably 40,000 to 180,000, even more preferably 50,000 to 160,000.
- the Mw of the acrylic block copolymer (II) is 30,000 or more, the cohesive force of the acrylic block copolymer (II) increases, and the durability of the obtained resin composition tends to be more excellent.
- problems such as bleeding originating from the acrylic block copolymer (II) are less likely to occur on the surface of the molded article.
- the productivity and workability tend to be excellent.
- the compatibility with the acrylic block copolymer (I) described above tends to be good, and the resulting resin composition tends to be more excellent in transparency, and a molded article produced from the resin composition. Physical properties tend to be more stable.
- the acrylic block copolymer (II) preferably has a molecular weight distribution (Mw/Mn) of 1.0 to 1.5.
- Mw/Mn molecular weight distribution
- the molecular weight distribution of the acrylic block copolymer (II) is within the above range, the cohesive force of the acrylic block copolymer (II) can be easily increased, and contamination of equipment during processing of the resulting resin composition can be suppressed. tends to be easier.
- the molecular weight distribution is more preferably 1.0 to 1.4, even more preferably 1.0 to 1.3.
- the MFR of the acrylic block copolymer (II) under conditions of 230°C and a load of 3.8 kg is preferably 20 g/10 minutes or more, more preferably 30 g/10 minutes or more.
- MFR is at least the above lower limit, miscibility with the acrylic block copolymer (I) is more excellent, and good compatibility and excellent transparency tend to be obtained. If the MFR is too high, the kneadability during processing tends to be insufficient due to the low melt viscosity. It is more preferable to have When the MFR is equal to or less than the above upper limit, there is a tendency that melt-kneading can be easily performed.
- the method for producing acrylic block copolymer (I) and acrylic block copolymer (II) is not particularly limited, and these acrylic block copolymers can be produced by a production method according to known methods.
- a method for obtaining a block copolymer with a narrow molecular weight distribution a method of living polymerization of a monomer that is a constituent unit is employed.
- Examples of such a living polymerization method include a method of living polymerization using an organic rare earth metal complex as a polymerization initiator (see, for example, JP-A-11-335432), and an alkali metal compound using an organic alkali metal compound as a polymerization initiator.
- a method of living anionic polymerization in the presence of mineral acid salts such as alkaline earth metal salts see, for example, JP-B-7-25859
- an organic alkali metal compound as a polymerization initiator and living in the presence of an organic aluminum compound examples thereof include an anionic polymerization method (see, for example, JP-A-6-93060) and an atom transfer radical polymerization method (ATRP) (see, for example, Macromol. Chem. Phys., 2000, 201, p.
- the method of living anion polymerization in the presence of an organoaluminum compound has less deactivation during polymerization, so less homopolymer is mixed in, and the obtained block copolymer has high transparency.
- the polymerization conversion rate of the monomer is high, the amount of residual monomer in the block copolymer is small, and the generation of air bubbles can be suppressed when producing pellets containing the acrylic block copolymer.
- the molecular structure of the polymer block composed of the methacrylic acid alkyl ester units becomes highly syndiotactic, which has the effect of increasing the durability of the resulting resin composition containing the acrylic block copolymer.
- the acrylic block copolymer is preferably produced by a method of living anionic polymerization using an organic alkali metal compound as a polymerization initiator in the presence of an organic aluminum compound.
- Examples of the living anionic polymerization method in the presence of the organoaluminum compound include an organolithium compound and the following general formula (3) AlR3R4R5 ( 3 ) (In formula (3), R 3 , R 4 and R 5 are each independently an optionally substituted alkyl group, an optionally substituted cycloalkyl group, a substituted aryl group, optionally substituted aralkyl group, optionally substituted alkoxy group, optionally substituted aryloxy group or N,N-disubstituted amino group or R 3 is any of the groups described above, and R 4 and R 5 together form an arylenedioxy group which may have a substituent.
- R 3 , R 4 and R 5 are each independently an optionally substituted alkyl group, an optionally substituted cycloalkyl group, a substituted aryl group, optionally substituted aralkyl group, optionally substituted alkoxy group, optionally substituted aryloxy group or N,N-d
- Ether compounds such as dimethyl ether, dimethoxyethane, diethoxyethane, 12-crown-4, etc.; triethylamine, N,N,N',N'-tetramethyl Nitrogen-containing compounds such as ethylenediamine, N,N,N',N'',N'-pentamethyldiethylenetriamine, 1,1,4,7,10,10-hexamethyltriethylenetetramine, pyridine, and 2,2'-dipyridyl is further added to polymerize the (meth)acrylic acid ester.
- Examples of the organic lithium compound include alkyllithium or alkyldilithium such as n-butyllithium, sec-butyllithium and tetramethylenedilithium; aryllithium or aryldilithium such as phenyllithium and xylyllithium; benzyllithium; Examples include aralkyllithium or aralkyldilithium such as dilithium produced by the reaction of diisopropenylbenzene and butyllithium; lithium amides such as lithium diisopropylamide; and lithium alkoxides such as methoxylithium.
- alkyllithium or alkyldilithium such as n-butyllithium, sec-butyllithium and tetramethylenedilithium
- aryllithium or aryldilithium such as phenyllithium and xylyllithium
- benzyllithium examples include aralkyllithium or
- organoaluminum compound represented by the general formula (3) isobutylbis(2,6-di-tert-butyl-4-methyl phenoxy)aluminum, isobutylbis(2,6-di-tert-butylphenoxy)aluminum, isobutyl[2,2'-methylenebis(4-methyl-6-tert-butylphenoxy)]aluminum and the like are preferred.
- the resin composition of the present invention contains 15 to 400 parts by mass of the acrylic block copolymer (II) with respect to 100 parts by mass of the acrylic block copolymer (I).
- the content of the acrylic block copolymer (II) with respect to 100 parts by mass of the acrylic block copolymer (I) is less than 15 parts by mass, the flexibility of the resulting resin composition not sexual enough.
- the content of the acrylic block copolymer (II) with respect to 100 parts by mass of the acrylic block copolymer (I) exceeds 400 parts by mass, the resulting resin composition will be contaminated with substances contained in sebum.
- the acrylic block copolymer in the resin composition of the present invention The content of the acrylic block copolymer (II) with respect to 100 parts by mass of (I) is preferably 15 to 300 parts by mass, more preferably 20 to 200 parts by mass.
- the total content of acrylic block copolymer (I) and acrylic block copolymer (II) contained in the resin composition of the present invention is preferably 80% by mass or more, and is 90% by mass or more. more preferably 95% by mass or more, and may be 100% by mass.
- the resin composition of the present invention contains other polymers, tackifying resins, softeners, plasticizers, heat stabilizers, light stabilizers, antistatic agents, flame retardants, foaming agents, as long as the effects of the present invention are not impaired. , colorants, dyes, refractive index modifiers, fillers, hardeners, lubricants, anti-sticking agents, anti-termites, and anti-mouse agents.
- One of these other polymers and additives may be contained, or two or more of them may be contained.
- acrylic resins such as polymethyl methacrylate and (meth)acrylic acid ester polymers or copolymers
- polyethylene ethylene-vinyl acetate copolymer, polypropylene, polybutene-1, poly -Olefin resins such as 4-methylpentene-1 and polynorbornene; ethylene ionomers; polystyrene, styrene-maleic anhydride copolymers, high impact polystyrene, AS resins, ABS resins, AES resins, AAS resins, ACS resins, Styrene resins such as MBS resin; styrene-methyl methacrylate copolymer; styrene-methyl methacrylate-maleic anhydride copolymer; polyester resins such as polyethylene terephthalate, polybutylene terephthalate, and polylactic acid; nylon 6, nylon 66, Polyamide such as polyamide elastomer; Polycarbonate
- polymethyl methacrylate, (meth)acrylic acid ester polymer or copolymer , ethylene-vinyl acetate copolymer, AS resin, styrene-methyl methacrylate-maleic anhydride copolymer, polylactic acid, polyvinylidene fluoride are preferred, polymethyl methacrylate, (meth) acrylic acid ester copolymer, styrene -methyl methacrylate-maleic anhydride copolymer is more preferred.
- Examples of the (meth)acrylate polymer or copolymer include polymethyl acrylate, n-butyl polyacrylate, 2-ethylhexyl polyacrylate, random copolymers of methyl methacrylate and methyl acrylate, Random copolymers of methyl methacrylate and n-butyl acrylate, diblock copolymers consisting of at least one polymer block consisting of methacrylate ester units and at least one polymer block consisting of acrylic ester units and triblock copolymers (however, the above diblock copolymers and triblocks do not include the acrylic block copolymer (I) and the acrylic block copolymer (II) of the present invention). do not have.).
- the resin composition of the present invention contains a tackifying resin
- pressure-sensitive adhesiveness tackiness
- the resin composition is used as an adhesive agent, the tackiness, adhesive strength and holding power can be easily adjusted.
- the tackifying resin include natural resins such as rosin-based resins and terpene-based resins; petroleum resins, hydrogenated (hereinafter sometimes referred to as "hydrogenated") petroleum resins, styrene-based resins, and coumarone-indene-based resins.
- synthetic resins such as phenol-based resins and xylene-based resins.
- the content thereof is, from the viewpoint of adhesive strength and durability, a total of 100 parts by mass of the acrylic block copolymer (I) and the acrylic block copolymer (II). It is preferably 1 to 100 parts by mass, more preferably 3 to 70 parts by mass, even more preferably 5 to 50 parts by mass, particularly preferably 5 to 40 parts by mass, and 5 ⁇ 35 parts by weight is most preferred.
- rosin-based resin examples include rosins such as gum rosin, tall oil rosin, and wood rosin; modified rosins such as hydrogenated rosin, disproportionated rosin, and polymerized rosin; Rosin ester etc. are mentioned.
- specific examples of the rosins include Pine Crystal KE-100, Pine Crystal KE-311, Pine Crystal KE-359, Pine Crystal KE-604, and Pine Crystal D-6250 (all manufactured by Arakawa Chemical Industries, Ltd.). be done.
- terpene-based resin examples include terpene resins mainly composed of ⁇ -pinene, ⁇ -pinene, dipentene, etc., aromatic modified terpene resins, hydrogenated terpene resins, and terpene phenol resins.
- terpene resins mainly composed of ⁇ -pinene, ⁇ -pinene, dipentene, etc. aromatic modified terpene resins, hydrogenated terpene resins, and terpene phenol resins.
- a specific example of the terpene-based resin is Tamanol 901 (manufactured by Arakawa Chemical Industries, Ltd.).
- Examples of the (hydrogenated) petroleum resins include (hydrogenated) aliphatic (C5) petroleum resins, ( hydrogenated) aromatic ( C9 ) petroleum resins, (hydrogenated) copolymer ( C5/ C9 ) petroleum resins, (hydrogenated) dicyclopentadiene petroleum resins, alicyclic saturated hydrocarbon resins, and the like.
- styrene resin examples include poly ⁇ -methylstyrene, ⁇ -methylstyrene/styrene copolymer, styrene monomer/aliphatic monomer copolymer, styrene monomer/ ⁇ -methyl Examples include styrene/aliphatic monomer copolymers, styrene monomer copolymers, styrene monomer/aromatic monomer copolymers, and the like. Specific examples of the styrene resin include FTR6000 series and FTR7000 series (manufactured by Mitsui Chemicals, Inc.).
- rosin-based resins rosin-based resins, terpene-based resins, (hydrogenated) petroleum resins and styrene-based resins are preferable in terms of expressing high adhesive strength, and rosin-based resins are preferable from the viewpoint of improving adhesiveness.
- Disproportionated or hydrogenated rosins purified by operations such as distillation, recrystallization, and extraction are more preferable from the viewpoint of suppressing deterioration in light resistance, coloration, and generation of bubbles due to impurities. These may be used alone or in combination of two or more.
- the softening point of the tackifier resin is preferably 50 to 150° C. from the viewpoint of exhibiting high adhesive strength.
- plasticizer examples include phthalates such as dibutyl phthalate, di-n-octyl phthalate, di-2-ethylhexyl phthalate, di-n-decyl phthalate and diisodecyl phthalate, di-2-ethylhexyl sebacate, Sebacate esters such as di-n-butyl sebacate, azelate esters such as di-2-ethylhexyl azelate, fatty acid esters such as adipate esters such as di-2-ethylhexyl adipate and di-n-octyl adipate paraffins such as chlorinated paraffin; glycols such as polypropylene glycol; epoxy polymer plasticizers such as epoxidized soybean oil and epoxidized linseed oil; phosphate esters such as trioctyl phosphate and triphenyl phosphate; Phosphites such as triphenyl
- the filler examples include inorganic fibers and organic fibers such as glass fiber and carbon fiber; and inorganic fillers such as calcium carbonate, talc, carbon black, titanium oxide, silica, clay, barium sulfate and magnesium carbonate.
- inorganic fibers and organic fibers are contained, durability is imparted to the resulting resin composition.
- inorganic filler is contained, heat resistance and weather resistance are imparted to the resulting resin composition.
- titanium oxide when titanium oxide is contained, light shielding properties are likely to be imparted to the resulting resin composition.
- the amount of titanium oxide added in the resin composition is preferably 20 to 250 parts by mass, more preferably 100 parts by mass in total of the acrylic block copolymer (I) and the acrylic block copolymer (II). is 30 to 150 parts by mass.
- the resin composition of the present invention When used together with a curing agent, it can be suitably used as a layer made of a UV-curable resin composition. Moreover, it can be suitably used as a UV-curing pressure-sensitive adhesive.
- the curing agent include photocuring agents such as UV curing agents, heat curing agents, and the like, and examples thereof include benzoins, benzoin ethers, benzophenones, anthraquinones, benzils, acetophenones, and diacetyls. .
- Curing agents may be used alone or in combination of two or more.
- monomers such as (meth) acrylic acid, (meth) acrylic acid esters, (meth) acrylamides, (meth) acrylamide derivatives, vinyl esters, vinyl ethers, styrene derivatives;
- An oligomer or the like containing a mer as a constituent may be further added.
- a cross-linking agent comprising a bifunctional or higher monomer or oligomer may be added.
- the resin composition of the present invention contains the acrylic block copolymer (I) and the acrylic block copolymer (II), it has excellent weather resistance.
- a light stabilizer By containing a light stabilizer, it is possible to develop even higher weather resistance.
- antioxidants include phenolic antioxidants, phosphorus antioxidants, and the like.
- ultraviolet absorbers include benzotriazole-based ultraviolet absorbers.
- Light stabilizers include hindered amine light stabilizers and the like. These may be contained individually by 1 type in the resin composition of this invention, and may be contained 2 or more types. Among them, it is a preferable embodiment that the molded article contains all of the antioxidant, the ultraviolet absorber, and the light stabilizer.
- the amount of each of the resin compositions of the present invention added is preferably 0.01 to 1.0 with respect to a total of 100 parts by mass of the acrylic block copolymer (I) and the acrylic block copolymer (II). parts by mass, more preferably 0.03 to 0.60 parts by mass.
- the method for producing the resin composition of the present invention is not particularly limited. , by mixing at a temperature within the range of 100-300°C. Moreover, after dissolving and mixing each component in an organic solvent, you may manufacture by distilling off this organic solvent.
- the resulting composition can be laminated with a layer made of a resin composition containing a plasticizer, which will be described later, after being melted by heat.
- the obtained resin composition can be used, for example, as a hot-melt pressure-sensitive adhesive by heating and melting.
- the plasticizing is performed before evaporating the organic solvent.
- the organic solvent can be distilled off and laminated on the layer of the resin composition.
- the resin composition is used as an adhesive, the components are dissolved in an organic solvent and mixed, and then the organic solvent is distilled off to produce the adhesive. It can be used as a pressure-sensitive adhesive by applying it to an adherend before distilling off the organic solvent, then distilling off the organic solvent and performing heat-sensitive adhesion.
- the melt viscosity is low from the viewpoint of workability and handling.
- the melt viscosity is preferably 50,000 mPa ⁇ s or less, more preferably 30,000 mPa ⁇ s or less.
- acrylic block copolymer (I) and the acrylic block copolymer (II) other polymers or additives may be added as necessary as raw materials for the resin composition of the present invention.
- the ingredients contained in the raw materials are contained, in order to enhance the dispersibility of each component contained in the raw materials, it is recommended to melt and mix these raw materials once using the above-described apparatus or the like.
- it improves the kneadability and compatibility between the acrylic block copolymer (I) and the acrylic block copolymer (II) contained in the resin composition of the present invention and the optional components.
- a twin-screw extruder From a point of view, it is preferable to use a twin-screw extruder.
- the temperature during mixing may be appropriately adjusted depending on the acrylic block copolymer (I) and the acrylic block copolymer (II) and the components added as necessary, and is usually 110°C to 300°C. It is good to mix at the temperature within the range.
- the resin composition of the present invention thus obtained can be formed at a sufficiently low temperature and can be heat-sensitive adhesive processed or hot-melt coated at a sufficiently low temperature. Temperatures of ⁇ 180°C allow these processes.
- a cylindrical test piece having a thickness of 1 mm and a diameter of 25 mm obtained by molding the resin composition is immersed in oleic acid, and the mass change rate [(immersion The mass of the test piece after immersion) ⁇ (the mass of the test piece before immersion)]/(the mass of the test piece before immersion) ⁇ 100 is preferably 200% or less.
- the mass change rate is more preferably 180% or less, and even more preferably 160% or less.
- the resin composition of the present invention can be used as a molded article by molding using a generally used molding method.
- the molding method include extrusion molding, injection molding, compression molding, blow molding, calender molding, vacuum molding, and other melt molding processing methods involving heating and melting, and solution casting methods.
- the melt molding method is preferable from the viewpoint of the handleability of the resin composition of the present invention.
- a molded article having an arbitrary shape is obtained.
- the hardness of the molded article is preferably 7.5 to 75, more preferably 8 to 65, even more preferably 10 to 60, from the viewpoint of physical properties and flexibility as a molded article.
- the raw material of the molded article (for example, pellets made of the resin composition of the present invention) is extruded or injection molded to contain the resin composition of the present invention.
- Monolayers can be produced.
- Extrusion molding methods include, for example, the T-die method and the inflation method, and among these, the T-die method is preferred.
- the resin composition of the present invention for example, pellets made of the resin composition of the present invention
- the raw material of the molded article is heated and melted and extruded from a T-die to obtain a single layer body.
- the resin composition of the present invention (for example, pellets of the resin composition of the present invention), which is the raw material of the molded article, is applied to the base layer.
- the resin composition of the present invention for example, pellets of the resin composition of the present invention
- the base layer is applied to the base layer.
- extrusion molding a laminate having a polymer layer containing acrylic block copolymer (I) and acrylic block copolymer (II) and a substrate layer can be produced.
- Extrusion methods include, for example, the T-die method and the inflation method, and among these, the T-die method is preferred.
- the laminate can be produced without using a solvent, and can be produced with relatively simple manufacturing equipment. By producing the laminate by extrusion molding, the production process can be simplified and the production cost of the laminate can be reduced.
- the resin composition of the present invention for example, pellets of the resin composition of the present invention
- the substrate is removed from the T-die.
- the co-extrusion molding method which is another example of the T-die method
- both the raw material of the layer containing the resin composition and the raw material of the base layer are heated and melted, and extruded at the same time.
- a laminate containing a layer containing the resin composition of the present invention and a substrate layer can be produced.
- the resin composition of the present invention is preferably extruded from a die at a temperature of 140 to 260°C in order to obtain good adhesion to the substrate layer.
- examples of the base material layer include films and sheets of synthetic polymer compounds, metal foils, papers, cellophane, nonwoven fabrics, woven fabrics, and the like.
- synthetic polymer compounds include polyethylene terephthalate, polyethylene naphthalate, triacetyl cellulose, polyamide, polyvinyl alcohol, polycarbonate, cycloolefin resin, styrene-methyl methacrylate copolymer, polyvinyl chloride, ethylene-vinyl acetate copolymer, Examples include, but are not limited to, polymers, polymethyl methacrylate, polyethylene, polypropylene, mixtures of two or more of these polymers, and the like.
- the synthetic polymer compound may be a copolymer obtained by copolymerizing various monomers. These films and sheets may be vapor-deposited with aluminum, alumina, or silicon dioxide. In addition, the films and sheets of these synthetic polymer compounds may be further printed with urethane ink or the like.
- Examples of metal foil include aluminum foil and copper foil
- examples of paper include kraft paper, high-quality paper, and glassine paper.
- Examples of nonwoven fabrics include nonwoven fabrics made of aramid fiber, glass fiber, cellulose fiber, nylon fiber, vinylon fiber, polyester fiber, polyolefin fiber, rayon fiber, and the like.
- Examples of woven fabrics include woven fabrics made of aramid fiber, glass fiber, cellulose fiber, nylon fiber, vinylon fiber, polyester fiber, polyolefin fiber, rayon fiber, and the like.
- the structure of the laminate includes, for example, a two-layer structure with a layer containing the resin composition of the present invention and a base layer, a three-layer structure with two base layers and a layer containing the resin composition of the present invention ( base layer/resin composition layer/base layer), two different layers containing the base layer and the resin composition of the present invention, the resin composition layer (a), the resin composition layer (b), and the base layer A four-layer configuration (base material layer / resin composition layer (a) / resin composition layer (b) / base layer), a base layer and a layer (a) containing the resin composition of the present invention and the A four-layer structure of a layer (c) containing a resin composition and a base layer (base layer/resin composition layer (a)/resin composition layer (c)/base layer), three base layers and Examples include, but are not limited to, a five-layer structure (base material layer/resin composition layer/base material layer/resin composition layer/base material layer) with two layers
- the thickness ratio of the substrate layer of the laminate and the layer containing the resin composition of the present invention is not particularly limited. /1000 to 1000/1, more preferably 1/200 to 200/1.
- the adhesive surface of the substrate layer which is in contact with the layer containing the resin composition of the present invention, may be oxidized with air or ozone gas.
- the adhesive surface of the substrate layer may be subjected to known surface treatments such as anchor coating agent treatment, corona discharge treatment, flame treatment and plasma treatment.
- an anchor layer may be formed on the surface of at least one of the resin composition layer and the substrate layer using an adhesive resin or the like.
- resins used for such anchor layers include ethylene-vinyl acetate copolymers, ethylene-methyl methacrylate copolymers, ionomers, block copolymers (for example, styrene-based triblock copolymers such as SIS and SBS, and diblock copolymers, etc.), ethylene-acrylic acid copolymers, ethylene-methacrylic acid copolymers, and the like.
- the anchor layer may be one layer, or two or more layers.
- the method of forming the anchor layer is not particularly limited.
- a method of forming an anchor layer on the surface of the substrate layer by using a T-die or the like can be mentioned.
- the co-extrusion molding method which is an example of the T-die method, may be either a feed block method or a multi-manifold method.
- a laminate of two kinds and two layers, a laminate of three kinds and three layers having an intermediate layer between the substrate layer and the resin composition layer, and the like can be produced.
- Suitable examples of the synthetic polymer compound is polyolefin.
- polyolefin materials include low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, ethylene- ⁇ olefin copolymer, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, Ethylene-methyl methacrylate copolymer, ethylene-n-butyl acrylate copolymer, polypropylene (homopolymer, random copolymer, block copolymer) and the like.
- polyolefin-based materials may be used alone, or may be used as a mixture or composition in any combination.
- block copolymer polypropylene is preferable as the material for the base material layer.
- the base material layer is not limited to a single layer, and may have a plurality of base material layers.
- the total thickness of the substrate layer consisting of a single layer or multiple layers is preferably 20 ⁇ m or more and 100 ⁇ m or less, for example.
- the laminate may have an intermediate layer.
- Resins that can be used as the intermediate layer include, for example, ethylene-vinyl acetate copolymers, ethylene-methyl methacrylate copolymers, ionomers, block copolymers (for example, styrene-based triblock copolymers such as SIS and SBS, and di- block copolymers, etc.), ethylene-acrylic acid copolymers, ethylene-methacrylic acid copolymers, and the like.
- the intermediate layer may be one layer, or two or more layers, and can be formed by co-extrusion simultaneously with the base layer and the layer containing the resin composition of the present invention.
- the resin composition of the present invention (for example, pellets of the resin composition of the present invention) is injection molded.
- a multilayer body having a layer (Z) containing the resin composition of the present invention and a polymer layer (Y) made of a material other than the resin composition of the present invention can be produced.
- injection molding methods include two-color molding and insert molding.
- Polymers constituting the polymer layer (Y) (hereinafter also referred to as layer (Y)) made of materials other than the resin composition of the present invention include, for example, polymethyl methacrylate and (meth)acrylic Acrylic resins such as acid ester copolymers; olefin resins such as polyethylene, ethylene-vinyl acetate copolymer, polypropylene, polybutene-1, poly-4-methylpentene-1, and polynorbornene; ethylene ionomers; Styrene resins such as styrene-maleic anhydride copolymer, high impact polystyrene, AS resin, ABS resin, AES resin, AAS resin, ACS resin, MBS resin; styrene-methyl methacrylate copolymer; polyethylene terephthalate, amorphous Polyethylene terephthalate (PET-G), polybutylene terephthalate, polyester resins such as polylactic acid; nylon 6, nylon 66, poly
- Examples of the layer (Y) include a layer (YI) containing a polar resin.
- Examples of the polar resin include acrylic resins such as polymethyl methacrylate and (meth)acrylate copolymer; polystyrene, styrene-maleic anhydride copolymer, high-impact polystyrene, AS resin, ABS resin, and AES.
- Styrene resins such as resins, AAS resins, ACS resins, and MBS resins; styrene-methyl methacrylate copolymers; polyester resins such as polyethylene terephthalate, amorphous polyethylene terephthalate (PET-G), polybutylene terephthalate, and polylactic acid; Polyamide such as nylon 6, nylon 66, polyamide elastomer; Polycarbonate; Polyvinyl chloride; Polyvinylidene chloride; Polyvinyl alcohol; Ethylene-vinyl alcohol copolymer; Polyacetal; modified resin; acrylic rubber; silicone rubber and the like.
- PET-G amorphous polyethylene terephthalate
- Polybutylene terephthalate polylactic acid
- Polyamide such as nylon 6, nylon 66, polyamide elastomer
- Polycarbonate Polyvinyl chloride; Polyvinylidene chloride; Polyvinyl alcohol; Ethylene-vinyl alcohol copolymer; Poly
- the layer (Z) and the layer (YI) are preferably adjacent to each other.
- the multilayer body has a layer (Z) that is excellent in low tack, transparency, flexibility, and impact absorption. Even when a highly rigid polar resin is used for the layer (YI) containing a polar resin, it is possible to have the properties of being excellent in both flexibility and impact absorption.
- the thickness of the layer (Z) and the layer (Y) constituting the multilayer body is not particularly limited, but from the viewpoint of the molded body being excellent in flexibility and impact absorption, the thickness of the layer (Z) is 0.1 to 10 mm. is preferred, 0.3 to 5 mm is more preferred, 0.5 to 3 mm is even more preferred, 0.7 to 2 mm, and may be 1 to 1.5 mm.
- the thickness of layer (Y) is preferably 0.3 to 10 mm, more preferably 0.5 to 5 mm, even more preferably 1 to 3 mm.
- Specific methods for producing the multilayer body include, for example, a method of separately forming the layer (Z) and the layer (Y) in advance and laminating them (method 1); A method of forming a layer (Z) by disposing the pellets of the present invention in a molten state on a layer (Y) placed thereon (Method 2); and a method of forming the layer (Y) (Method 3).
- methods 2 and 3 are preferable because the adhesive strength between the layer (Z) and the layer (Y) is improved, and method 2 is more preferable because the desired molded article can be obtained easily. .
- the resin composition of the present invention typically pellets of the resin composition of the present invention
- the layer (Z) by injection molding. It is more preferable to employ insert molding in which the layer (Y) is placed in a mold and then the resin composition of the present invention in a molten state is injected.
- Shapes of molded articles obtained from the resin composition include various shapes such as pellets, sheets, plates, pipes, tubes, belts, hoses, rods, and granules.
- automotive interior and exterior parts include car audio panels, instrument panels, dashboards, airbag covers, bumper parts, body panels, weather strips, grommets, glass run channels, rack and pinion boots, and suspension boots. , constant velocity joint boots, side moldings, mat guards, emblems, leather seats, floor mats, armrests, steering wheel covers, belt line moldings, flush mounts, gears, knobs, etc.
- liquid crystal display elements such as mobile phones, digital information terminals, pagers, navigation systems, in-vehicle liquid crystal displays, liquid crystal monitors, light control panels, displays for OA equipment, displays for AV equipment, electroluminescence display elements, touch panels, etc. can also be used for
- interior and exterior building materials such as curtain walls, roofing materials, roofing materials, window materials, rain gutters, exteriors, wall materials, flooring materials, It can be suitably applied to building materials, coated steel plates, coated plywood, sealing packings for doors and window frames, and the like.
- anti-vibration rubber, mats, seats, cushions, dampers, pads, mount rubber, and other anti-vibration rubber and damping materials materials for footwear such as sports shoes and fashion sandals; Home appliance parts; grips for scissors, screwdrivers, toothbrushes, pens, cameras, ski poles, etc.; office machine parts, such as copier feed rollers and take-up rollers; furniture, such as sofas and chair seats; switch covers, casters, stoppers, feet Parts such as rubbers and earphones; sporting goods such as swimming goggles, snorkels, ski boots, snowboard boots, skis/snowboards, golf ball covers; industrial materials such as conveyor belts, electric belts, pelletizer rolls; paper diapers, poultice materials Elastic members for sanitary materials such as bandages; Band applications such as hair bands, wrist bands, watch bands, and eyeglass bands; Food packaging materials such as food wrap films; Medical devices such as infusion bags, syringes, catheters, and rolling tubes; It can be effectively used for a
- the laminate which is one type of the molded article of the present invention, can be used for various purposes.
- surface protection masking, wrapping/packaging, office use, labeling, decoration/indication, bookbinding, dicing tape, medical/hygiene, laminated glass, shatterproof glass, electrical insulation
- Examples include adhesive tapes and adhesive films for holding and fixing electronic devices, manufacturing semiconductors, optical display films, adhesive optical films, electromagnetic wave shields, and sealing materials for electrical and electronic parts. Specific examples are given below.
- For surface protection it can be used for various materials such as metal, plastic, rubber, and wood. Specifically, it is used for surface protection of painted surfaces, plastic processing and deep drawing of metals, automobile parts, and optical parts. Available. Examples of the automobile parts include painted outer panels, wheels, mirrors, windows, lights, light covers, and the like. Examples of the optical member include various image display devices such as a liquid crystal display, an organic EL display, a plasma display, and a field emission display; ⁇ Precision fine-coated face plates for optical applications.
- Masking applications include masking during manufacturing of printed circuit boards and flexible printed circuit boards; masking during plating and soldering in electronic equipment; manufacturing of vehicles such as automobiles, painting and printing of vehicles and buildings, and masking during civil engineering work. etc.
- Packaging applications include heavy duty packaging, export packaging, cardboard box sealing, and can sealing.
- Office uses include general office use, sealing, repair of books, drafting, memo use, and the like.
- Label applications include price, product display, luggage tags, POP, stickers, stripes, nameplates, decorations, advertisements, marking films, and the like.
- Label applications include paper, processed paper (paper with aluminum vapor deposition, aluminum laminating, varnishing, resin processing, etc.), paper such as synthetic paper; cellophane, plastic materials, cloth, wood and metal
- a label having a film or the like as a base layer is exemplified.
- base material layers include woodfree paper, art paper, cast paper, thermal paper, wheel paper, polyethylene terephthalate film, polyvinyl chloride film, OPP film, polylactic acid film, synthetic paper, synthetic paper thermal, over-laminated film, and the like. are mentioned.
- Examples of the adherend of the above label include plastic products such as plastic bottles and foamed plastic cases; paper and cardboard products such as cardboard boxes; glass products such as glass bottles; metal products; be done.
- Decorative and display applications include danger display stickers, line tapes, wiring markings, phosphorescent tapes, and reflective sheets.
- Examples of adhesive optical film applications include polarizing films, polarizing plates, retardation films, viewing angle widening films, brightness enhancement films, antireflection films, anti-glare films, color filters, light guide plates, diffusion films, prism sheets, and electromagnetic wave shielding films. , near-infrared absorbing films, functional composite optical films, films for laminating ITO, films for imparting impact resistance, films for improving visibility, etc. mentioned. Such adhesive optical films also include protective films used for surface protection of the optical films. Adhesive optical films are suitably used for various image display devices such as liquid crystal display devices, PDPs, organic EL display devices, electronic papers, game machines, and mobile terminals.
- Electrical insulation applications include protective coating or insulation for coils, and interlayer insulation for motors and transformers.
- Applications for holding and fixing electronic devices include carrier tapes, packaging, fixing of cathode ray tubes, splicing, rib reinforcement, and the like. For semiconductor manufacturing, it can be used to protect silicone wafers.
- pain relief anti-inflammatory agents plaster, poultice
- patches for colds for colds
- antipruritic patches percutaneous absorption medicine applications
- percutaneous absorption medicine applications such as keratin softeners
- tape applications such as hemostats, tapes for human excrement treatment attachments (tape for fixing colostomy), suture tapes, antibacterial tapes, fixing tapings, self-adhesive bandages, oral mucosa adhesive tapes, sports tapes, hair removal tapes, etc.
- cosmetic applications such as face packs, moisturizing sheets around the eyes, exfoliating packs; binding applications for sanitary materials such as diapers and pet sheets;
- sealing materials for electronic and electrical parts include liquid crystal displays, organic EL displays, organic EL lighting, and solar cells.
- Weight average molecular weight (Mw), number average molecular weight (Mn), and molecular weight distribution (Mw/Mn) The weight average molecular weight and number average molecular weight of the acrylic block copolymer were determined by gel permeation chromatography (hereinafter abbreviated as GPC) in terms of polystyrene equivalent molecular weight, and the molecular weight distribution was calculated from these values.
- GPC gel permeation chromatography
- composition ratio of each polymer block Obtained by 1 H-NMR measurement.
- Apparatus Nuclear magnetic resonance apparatus "JNM-LA400” manufactured by JEOL Ltd.
- Heavy solvent Deuterated chloroform
- signals near 3.6 ppm, 3.7 ppm and 4.0 ppm are carbon atoms adjacent to oxygen atoms contained in ester groups of methyl methacrylate units, respectively.
- the molar ratio of each monomer unit is obtained from the ratio, and the content of each polymer block is obtained by converting this into a mass ratio based on the
- solubility parameters SP(A1) and SP(B1) of polymer blocks (A1) and (B1) were obtained by the Fedors estimation method.
- the values of the methyl acrylate unit, the n-butyl acrylate unit, and the 2-ethylhexyl acrylate unit contained in each polymer block the values described above were used as they were.
- the details of the case where each polymer block is a polymer block composed of a plurality of monomer units will be described below with reference to embodiments.
- the solubility parameter of the homopolymer corresponding to the monomer units contained in the polymer block was used.
- the solubility parameters for the homopolymers included in the synthesis examples below are: polymethyl acrylate (methyl acrylate units), poly n-butyl acrylate (n-butyl acrylate units), poly 2-ethylhexyl acrylate (acrylic acid 2-ethylhexyl unit) and ⁇ E and V of polymethyl methacrylate (methyl methacrylate unit), which are 11.30 (cal/cm 3 ) 1/2 and 10.20 (cal/cm 3 ) 1/2 respectively. , 9.50 (cal/cm 3 ) 1/2 and 10.50 (cal/cm 3 ) 1/2 .
- the solubility parameter SP(C) of oleic acid is 9.14 (cal/cm 3 ) 1/2 .
- the index value of the solubility parameter of the acrylic block copolymer (I-1) used in Example 1 is 10.46 (cal/cm 3 ). Asked for 1/2 .
- Oleic acid immersion test A disc having a diameter of 25 mm was punched out from the press sheets prepared in Examples and Comparative Examples, and the disc was used as a test piece. First, the mass of the test piece was measured and defined as the mass before immersion (W 1 ). Next, the test piece was immersed in oleic acid at 25° C. for 168 hours, and then the test piece was taken out and oleic acid adhering to the surface was wiped off. The mass of this test piece was measured and defined as the mass (W 2 ) after the immersion test. Then, from the above W 1 and W 2 , the mass change rate (W 2 ⁇ W 1 )/W 1 in the immersion test was determined as a percentage.
- Examples 1 to 7 which satisfy the provisions of the present invention, had a small mass change rate in the oleic acid immersion test.
- the molded articles obtained in Examples 1 to 7 had low hardness and retained flexibility.
- Comparative Example 1 a composition obtained by adding 500 parts by mass of the acrylic block copolymer (II-4) to the acrylic block copolymer (I-1) and a molded article of the composition were investigated. However, although the resulting molded article retained its flexibility, the rate of mass change in the oleic acid immersion test was large, and the shape could not be maintained.
- Comparative Example 2 100 parts by mass of an acrylic block copolymer (II'-1) having a high polymer block (A2) content was added to the acrylic block copolymer (I-1). A product and a molded product of the composition were examined. However, although the resulting molded article had a good mass change rate in the oleic acid immersion test, it could not maintain its flexibility.
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Abstract
Description
[1] メタクリル酸エステル単位を含む少なくとも1個の重合体ブロック(A1)及びアクリル酸エステル単位を含む少なくとも1個の重合体ブロック(B1)を有するアクリル系ブロック共重合体(I)100質量部と、メタクリル酸メチル単位を含む少なくとも1個の重合体ブロック(A2)及びアクリル酸エステル単位を含む少なくとも1個の重合体ブロック(B2)を有するアクリル系ブロック共重合体(II)15~400質量部とを含む樹脂組成物であり、
前記アクリル系ブロック共重合体(I)中の重合体ブロック(A1)の含有量が20質量%以上であり、
前記アクリル系ブロック共重合体(I)の重合体ブロック(B1)は、一般式CH2=CH-COOR1(1)(式(1)中、R1は炭素数1~3の有機基を表す)で示されるアクリル酸エステル(b1-1)単位を含有し、かつ
前記アクリル系ブロック共重合体は下記式(i)及び(ii)を満たし、
(i) (H)×SP(A1)+(J)×SP(B1)-SP(C)>1.20
(ii) -0.80≦SP(A1)-SP(B1)≦0.43
(前記式(i)及び(ii)中、SP(A1)は重合体ブロック(A1)の溶解度パラメーター(cal/cm3)1/2、SP(B1)は重合体ブロック(B1)の溶解度パラメーター(cal/cm3)1/2を示し、SP(C)はオレイン酸の溶解度パラメーター(cal/cm3)1/2を示し、(H)は重合体ブロック(A1)のアクリル系ブロック共重合体(I)中の質量割合、(J)は重合体ブロック(B1)のアクリル系ブロック共重合体(I)中の質量割合を示す。)
前記アクリル系ブロック共重合体(II)の重合体ブロック(B2)は、一般式CH2=CH-COOR2(2)(式(2)中、R2は炭素数4~12の有機基を表す)で示されるアクリル酸エステル(b2-2)単位を含有し、かつ
アクリル系ブロック共重合体(II)中の重合体ブロック(A2)の含有量が35質量%未満である、
樹脂組成物;
[2] 前記アクリル系ブロック共重合体(I)及び(II)の重量平均分子量がともに30,000~300,000の範囲である、[1]に記載の樹脂組成物;
[3] 前記樹脂組成物を成形して得られる厚み1mm、直径25mmの円柱状試験片を、オレイン酸に浸漬し、25℃で168時間保管前後の質量変化率[(浸漬後の試験片の質量)-(浸漬前の試験片の質量)]/(浸漬前の試験片の質量)×100が200%以下である[1]又は[2]に記載の樹脂組成物;
[4] アクリル系ブロック共重合体(II)中の前記アクリル酸エステル(b2-2)単位がアクリル酸n-ブチル単位である、[1]~[3]のいずれかに記載の樹脂組成物;
[5] アクリル系ブロック共重合体(I)中の前記アクリル酸エステル(b1-1)単位がアクリル酸メチル単位である、[1]~[4]のいずれかに記載の樹脂組成物;
を提供することにより達成される。
本発明の樹脂組成物に含まれるアクリル系ブロック共重合体(I)は、メタクリル酸エステル単位を含む少なくとも1個の重合体ブロック(A1)と、アクリル酸エステル単位を含む少なくとも1個の重合体ブロック(B1)とを有し、重合体ブロック(B1)に含まれるアクリル酸エステル単位として、一般式CH2=CH-COOR1(1)(式(1)中、R1は炭素数1~3の有機基を表す)で示されるアクリル酸エステル(b1-1)単位を含有する。
メタクリル酸フェニル、メタクリル酸ベンジル等のメタクリル酸アルキル以外の、官能基を有さないメタクリル酸エステル;
メタクリル酸メトキシエチル、メタクリル酸エトキシエチル等のメタクリル酸アルコキシアルキルエステル、メタクリル酸ジエチルアミノエチル、メタクリル酸2-ヒドロキシエチル、メタクリル酸2-アミノエチル、メタクリル酸グリシジル、メタクリル酸テトラヒドロフルフリル等の官能基を有するメタクリル酸エステル;等が挙げられる。
これらアクリル酸エステル(b1-1)は単独で用いてもよく、2種以上を併用してもよい。
これらアクリル酸エステル(b1-2)は単独で用いてもよく、2種以上を併用してもよい。
(A1-B1)n
(A1-B1)n-A1
A1-(A1-B1)n
(A1-B1)n-Z
(B1-A1)n-Z
(式中、nは1~30の整数、Zはカップリング部位(カップリング剤が重合体末端と反応して化学結合を形成した後のカップリング部位)を表す)で表されるものであることが好ましい。また、上記nの値は、1~15であることが好ましく、1~8であることがより好ましく、1~4であることがさらに好ましい。)
具体的には、下記一般式:
(A1-B1)n-A1
(A1-B1)m-Z
(式中、nは1~30の整数、mは2~30の整数、Zはカップリング部位(カップリング剤が重合体末端と反応して化学結合を形成した後のカップリング部位)を表す)で表されるものであることが好ましい。上記mの値は、2~15であることが好ましく、2~8であることがより好ましく、2~4であることがさらに好ましい。また、上記nの値は、1~15であることが好ましく、1~8であることがより好ましく、1~4であることがさらに好ましい。)
重合体ブロック(A1)の含有量が20質量%以上であると、アクリル系ブロック共重合体(I)の凝集力が高くなりやすく、アクリル系ブロック共重合体(I)及び後述するアクリル系ブロック共重合体(II)から樹脂組成物を製造する際、形状を維持しやすい傾向にあり、良好な成形性となる傾向にもある。重合体ブロック(A1)の含有量が40質量%以下であると、柔軟性に優れる樹脂組成物が得られる傾向にある。
アクリル系ブロック共重合体(I)における重合体ブロック(A1)の含有量は、柔軟性に優れる樹脂組成物を得る観点からは、20~35質量%であることが好ましく、25~31質量%であることがより好ましい。
(i) (H)×SP(A1)+(J)×SP(B1)-SP(C)>1.20
(ii) -0.80≦SP(A1)-SP(B1)≦0.43
前記式(i)及び(ii)中、SP(A1)は重合体ブロック(A1)の溶解度パラメーター(cal/cm3)1/2、SP(B1)は重合体ブロック(B1)の溶解度パラメーター(cal/cm3)1/2を示し、SP(C)はオレイン酸の溶解度パラメーター(cal/cm3)1/2を示し、(H)は重合体ブロック(A1)のアクリル系ブロック共重合体(I)中の質量割合、(J)は重合体ブロック(B1)のアクリル系ブロック共重合体(I)中の質量割合を示す。
上記式(i)の左辺に含まれる(H)×SP(A1)+(J)×SP(B1)の値は、アクリル系ブロック共重合体(I)全体の溶解度パラメーターの指標となる値である。この値と、オレイン酸の溶解度パラメーターSP(C)との差が、特定の範囲であることが、皮脂に含まれる物質による汚染を十分に抑制し、柔軟性を保持する上では重要である。
その理由の詳細は不明であるが、アクリル系ブロック共重合体全体の溶解度パラメーターがオレイン酸との溶解度パラメーターとの差が特定の値を超えることにより、皮脂に含まれる物質全体の汚染が抑制できる傾向にあるものと推定される。
(i-1) (H)×SP(A1)+(J)×SP(B1)-SP(C)>1.25
(i-2) (H)×SP(A1)+(J)×SP(B1)-SP(C)>1.30
上記式(ii)中のSP(A1)-SP(B1)の値は、アクリル系ブロック共重合体(I)中の重合体ブロック(A1)と(B1)との溶解度パラメーターの差であり、式(ii)はこの差が特定の範囲にあることが重要であることを示す。
この溶解度パラメーターの差が特定の範囲にあることで、後述するアクリル系ブロック共重合体(II)と組み合わせて使用した場合も、柔軟性を十分に発揮できるだけでなく、オレイン酸などの皮脂に含まれる物質に対する耐汚染性を十分に発揮できる。
その理由の詳細は不明であるが、アクリル系ブロック共重合体(I)に含まれる重合体ブロックの溶解度パラメーター差が特定以下の値となることにより、各重合体ブロックの相分離が抑制され皮脂成分が入りにくくなり皮脂に含まれる物質全体の汚染が抑制できる傾向にあるものと推定される。
(ii-1) -0.70≦SP(A1)-SP(B1)≦0.43
(ii-2) -0.65≦SP(A1)-SP(B1)≦0.43
本発明の樹脂組成物に含まれるアクリル系ブロック共重合体(II)は、アクリル系ブロック共重合体(I)とは異なる重合体であり、メタクリル酸メチル単位を含む少なくとも1個の重合体ブロック(A2)及びアクリル酸エステル単位を含む少なくとも1個の重合体ブロック(B2)を有し、その重合体ブロック(B2)は、一般式CH2=CH-COOR2(2)(式(2)中、R2は炭素数4~12の有機基を表す)で示されるアクリル酸エステル(b2-2)単位を含有し、かつ
アクリル系ブロック共重合体(II)中の重合体ブロック(A2)の含有量が35質量%未満である。
本発明の樹脂組成物にアクリル系ブロック共重合体(I)に加えてアクリル系ブロック共重合体(II)が含まれることにより、皮脂に含まれる物質、特にオレイン酸による汚染を十分に抑制することができるだけでなく、柔軟性にも優れる樹脂組成物が得られる。
アクリル酸エステル(b2-1)単位が、重合体ブロック(B2)に含まれないことにより、柔軟性により優れた樹脂組成物が得られる。
(A2-B2)i
(A2-B2)i-A2
A2-(A2-B2)i
(A2-B2)i-Z
(B2-A2)i-Z
(式中、iは1~30の整数、Zはカップリング部位(カップリング剤が重合体末端と反応して化学結合を形成した後のカップリング部位)を表す)で表されるものであることが好ましい。また、上記iの値は、1~15であることが好ましく、1~8であることがより好ましく、1~4であることがさらに好ましい。)
具体的には、下記一般式:
(A2-B2)i-A2
(A2-B2)k-Z
(式中、iは1~30の整数、kは2~30の整数、Zはカップリング部位(カップリング剤が重合体末端と反応して化学結合を形成した後のカップリング部位)を表す)で表されるものであることが好ましい。上記kの値は、2~15であることが好ましく、2~8であることがより好ましく、2~4であることがさらに好ましい。また、上記iの値は、1~15であることが好ましく、1~8であることがより好ましく、1~4であることがさらに好ましい。)
アクリル系ブロック共重合体(II)における重合体ブロック(A2)の含有量は、柔軟性に優れる樹脂組成物がより得られやすいことからは、33質量%未満であることが好ましく、32質量%未満であることがより好ましい。また、アクリル系ブロック共重合体(II)に由来するブリードを抑制する観点から、重合体ブロック(A2)の含有量は、3質量%以上であることが好ましい。
AlR3R4R5 (3)
(式(3)中、R3、R4及びR5はそれぞれ独立して置換基を有してもよいアルキル基、置換基を有していてもよいシクロアルキル基、置換基を有してもよいアリール基、置換基を有していてもよいアラルキル基、置換基を有してもよいアルコキシ基、置換基を有してもよいアリールオキシ基又はN,N-二置換アミノ基を表すか、或いはR3が上記したいずれかの基であり、R4及びR5が一緒になって置換基を有していてもよいアリーレンジオキシ基を形成している。)で表される有機アルミニウム化合物の存在下に、必要に応じて、反応系内に、ジメチルエーテル、ジメトキシエタン、ジエトキシエタン、12-クラウン-4等のエーテル化合物;トリエチルアミン、N,N,N',N'-テトラメチルエチレンジアミン、N,N,N',N",N"-ペンタメチルジエチレントリアミン、1,1,4,7,10,10-ヘキサメチルトリエチレンテトラミン、ピリジン、2,2'-ジピリジル等の含窒素化合物をさらに添加して、(メタ)アクリル酸エステルを重合させる方法が採用できる。
本発明の樹脂組成物において、アクリル系ブロック共重合体(I)100質量部に対するアクリル系ブロック共重合体(II)の含有量が、15質量部未満であると、得られる樹脂組成物の柔軟性が十分ではない。一方、アクリル系ブロック共重合体(I)100質量部に対するアクリル系ブロック共重合体(II)の含有量が、400質量部を超えると、得られる樹脂組成物の、皮脂に含まれる物質による汚染を十分に抑制することが困難となる。
得られる樹脂組成物の皮脂に含まれる物質による汚染をより抑制し、その樹脂組成物の柔軟性をより優れたものとする点からは、本発明の樹脂組成物における、アクリル系ブロック共重合体(I)100質量部に対するアクリル系ブロック共重合体(II)の含有量は、15~300質量部であることが好ましく、20~200質量部であることがより好ましい。
また、酸化チタンが含まれていると、得られる樹脂組成物に光遮蔽性が付与されやすい。樹脂組成物中の酸化チタンの添加量は、アクリル系ブロック共重合体(I)及びアクリル系ブロック共重合体(II)の合計100質量部に対して、好ましくは20~250質量部、より好ましくは、30~150質量部である。
酸化防止剤としては、フェノール系酸化防止剤、リン系酸化防止剤等が挙げられる。紫外線吸収剤としては、ベンゾトリアゾール系紫外線吸収剤等が挙げられる。光安定剤としては、ヒンダードアミン系光安定剤等が挙げられる。
これらは本発明の樹脂組成物に1種単独で含まれていてもよいし、2種以上含まれていてもよい。中でも、酸化防止剤、紫外線吸収剤、光安定剤のすべてが成形体に含まれていることが好ましい一態様である。
本発明の樹脂組成物の各々の添加量は、アクリル系ブロック共重合体(I)及びアクリル系ブロック共重合体(II)の合計100質量部に対して、好ましくは0.01~1.0質量部、より好ましくは、0.03~0.60質量部である。
このような特性を有する樹脂組成物は、皮脂に含まれる物質、特にオレイン酸による汚染をより十分に抑制できていることになる。かかる観点から、上記質量変化率は180%以下であることがより好ましく、160%以下であることがさらに好ましい。
上記成形体の硬度は、成形体としての物性と柔軟性の観点から7.5~75であることが好ましく、8~65であることがより好ましく、10~60であることが更に好ましい。
樹脂組成物から得られる成形体の形状としては、例えば、ペレット、シート、プレート、パイプ、チューブ、ベルト、ホース、棒状体、粒状体等、種々の形状が挙げられる。
アクリル系ブロック共重合体の重量平均分子量及び数平均分子量は、ゲル・パーミエーション・クロマトグラフィー(以下GPCと略記する)によりポリスチレン換算分子量で求め、分子量分布はこれらの値から算出した。分子量の測定条件の詳細は以下のとおりである。
・装置:東ソー株式会社製GPC装置「HLC-8020」
・分離カラム:東ソー株式会社製の「TSK-gel SuperMultipore HZ M」を2本直列に連結
・溶離剤:テトラフドロフラン
・溶離剤流量:0.36ml/分
・カラム温度:40℃
・検出方法:示差屈折率(RI)
1H―NMR測定によって求めた。
・装置:日本電子株式会社製核磁気共鳴装置「JNM-LA400」
・重溶媒:重水素化クロロホルム
1H―NMRスペクトルにおいて、3.6ppm、3.7ppm及び4.0ppm付近のシグナルは、それぞれ、メタクリル酸メチル単位のエステル基に含まれる酸素原子に隣接する炭素原子に結合した水素原子(-O-CH 3)、アクリル酸メチル単位のエステル基に含まれる酸素原子に隣接する炭素原子に結合した水素原子(-O-CH 3)、アクリル酸n-ブチル単位のエステル基に含まれる酸素原子に隣接する炭素原子に結合した水素原子(-O-CH 2-CH2-CH2-CH3)及びアクリル酸2-エチルヘキシル単位のエステル基に含まれる酸素原子に隣接する炭素原子に結合した水素原子(-O-CH 2-CH(-CH2-CH3)-CH2-CH2-CH2-CH3)に帰属され、これらの積分値の比から各単量体単位のモル比を求め、これを単量体単位の分子量をもとに質量比に換算することによって各重合体ブロックの含有量を求め、アクリル系ブロック共重合体に含まれるメタクリル酸メチル単位の質量割合を(H)、アクリル酸エステル単位の質量割合を(J)とした。
重合体ブロック(A1)及び(B1)の溶解度パラメーターSP(A1)及びSP(B1)はFedorsの推算法により求めた。なお、各重合体ブロックに含まれるアクリル酸メチル単位、アクリル酸n-ブチル単位、アクリル酸2-エチルヘキシル単位の値としては上述した値をそのまま用いた。各重合体ブロックが複数の単量体単位からなる重合体ブロックである場合の詳細については、実施例の態様を挙げながら以下に説明する。
SP(X)=[Σ[φi×[SP(X)i]2]]1/2
(式中、SP(X)がその重合体ブロック(X)の溶解度パラメーター、φiは重合体ブロック(X)中の単量体単位(i)の体積分率、SP(X)iは単量体単位(i)からなる単独重合体のFedorsの推算法により求めた溶解度パラメーターを示す。体積分率は、重合体ブロックを構成する各単量体単位の質量割合と同じとした。)
実施例1で使用したアクリル系ブロック共重合体(I-1)は重合体ブロック(A1)の含有率が29質量%であり、重合体ブロック(B1)の構成する単量体単位がアクリル酸n-ブチル:アクリル酸メチル=80:20(質量比)である。これと、前記Fedorsの推算法により計算した溶解度パラメーターから、実施例1で使用したアクリル系ブロック共重合体(I-1)の溶解度パラメーターの指標となる値は10.46(cal/cm3)1/2と求めた。
実施例及び比較例で作製したプレスシートを直径25mmの円盤状に打ち抜き、それを試験片とした。まず、前記試験片の質量を測定し、これを浸漬前の質量(W1)とした。次に、その試験片を25℃のオレイン酸に168時間浸漬した後、その試験片を取り出して表面に付着しているオレイン酸を拭き取った。この試験片の質量を測定し、これを浸漬試験後の質量(W2)とした。そして、前記W1及びW2から、浸漬試験による質量変化率(W2-W1)/W1を百分率として求めた。
実施例及び比較例で作製したプレスシートを縦50mm、横50mmに切断し、上記シートを6枚重ねて厚み6mmの硬度をタイプAデュロメータの圧子を用い、JIS6253-3:2021に準拠して測定した。
(1)2Lの三口フラスコに三方コックを付け内部を窒素で置換した後、室温で攪拌しながらトルエン1154gと1,2-ジメトキシエタン24.9gを加え、続いて、イソブチルビス(2,6-ジ-ブチル-4-メチルフェノキシ)アルミニウム19.0mmolを含有するトルエン溶液37.8gを加え、さらにsec-ブチルリチウム3.22molを含有するsec-ブチルリチウムのシクロヘキサン溶液1.89gを加えた。
(2)続いて、これにメタクリル酸メチル22.9gを加えた。反応液は当初、黄色に着色していたが、室温にて60分間攪拌後には無色となった。
(3)引き続き、重合液の内部温度を-30℃に冷却し、アクリル酸メチル/アクリル酸n-ブチルの混合物(質量比20/80)150gを2時間かけて滴下し、滴下終了後-30℃にて5分間攪拌した。
(4)さらに、これにメタクリル酸メチル38.2gを加え、一晩室温にて攪拌した。
(5)メタノール12.2gを添加して重合反応を停止した後、得られた反応液15kgのメタノール中に注ぎ、白色沈殿物を析出させた。その後、白色沈殿物を回収し、乾燥させることにより、アクリル系ブロック共重合体(I-1)200gを得た。
(1)2Lの三口フラスコに三方コックを付け内部を窒素で置換した後、室温で攪拌しながらトルエン936gと1,2-ジメトキシエタン51.4gを加え、続いて、イソブチルビス(2,6-ジ-ブチル-4-メチルフェノキシ)アルミニウム16.5mmolを含有するトルエン溶液32.9gを加え、さらにsec-ブチルリチウム6.62molを含有するsec-ブチルリチウムのシクロヘキサン溶液3.88gを加えた。
(2)続いて、これにメタクリル酸メチル52.9gを加えた。反応液は当初、黄色に着色していたが、室温にて60分間攪拌後には無色となった。
(3)引き続き、重合液の内部温度を-30℃に冷却し、アクリル酸n-ブチル226gを2時間かけて滴下し、滴下終了後-30℃にて5分間攪拌した。
(4)さらに、これにメタクリル酸メチル46.2gを加え、一晩室温にて攪拌した。
(5)メタノール13.7gを添加して重合反応を停止した後、得られた反応液15kgのメタノール中に注ぎ、白色沈殿物を析出させた。その後、白色沈殿物を回収し、乾燥させることにより、アクリル系ブロック共重合体(II-1)300gを得た。
(1)2Lの三口フラスコに三方コックを付け内部を窒素で置換した後、室温で攪拌しながらトルエン1120gと1,2-ジメトキシエタン1.96gを加え、続いて、イソブチルビス(2,6-ジ-ブチル-4-メチルフェノキシ)アルミニウム9.3mmolを含有するトルエン溶液16.9gを加え、さらにsec-ブチルリチウム4.6molを含有するsec-ブチルリチウムのシクロヘキサン溶液2.37gを加えた。
(2)続いて、これにメタクリル酸メチル24.2gを加えた。反応液は当初、黄色に着色していたが、室温にて60分間攪拌後には無色となった。
(3)引き続き、重合液の内部温度を-30℃に冷却し、アクリル酸n-ブチル152gを2時間かけて滴下し、滴下終了後-30℃にて5分間攪拌した。
(4)さらに、これにメタクリル酸メチル24.2gを加え、一晩室温にて攪拌した。
(5)メタノール8.3gを添加して重合反応を停止した後、得られた反応液15kgのメタノール中に注ぎ、白色沈殿物を析出させた。その後、白色沈殿物を回収し、乾燥させることにより、アクリル系ブロック共重合体(II-2)200gを得た。
(1)2Lの三口フラスコに三方コックを付け内部を窒素で置換した後、室温で攪拌しながらトルエン938gと1,2-ジメトキシエタン20.2gを加え、続いて、イソブチルビス(2,6-ジ-ブチル-4-メチルフェノキシ)アルミニウム20.8mmolを含有するトルエン溶液41.4gを加え、さらにsec-ブチルリチウム2.60molを含有するsec-ブチルリチウムのシクロヘキサン溶液1.53gを加えた。
(2)続いて、これにメタクリル酸メチル21.8gを加えた。反応液は当初、黄色に着色していたが、室温にて60分間攪拌後には無色となった。
(3)引き続き、重合液の内部温度を-30℃に冷却し、アクリル酸2-エチルヘキシル/アクリル酸n-ブチルの混合物(質量比50/50)215gを2時間かけて滴下し、滴下終了後-30℃にて5分間攪拌した。
(4)さらに、これにメタクリル酸メチル29.4gを加え、一晩室温にて攪拌後、メタノール12.2gを添加して重合反応を停止した後、得られた反応液15kgのメタノール中に注ぎ、白色沈殿物を析出させた。その後、白色沈殿物を回収し、乾燥させることにより、アクリル系ブロック共重合体(II-3)280gを得た。
(1)2Lの三口フラスコに三方コックを付け内部を窒素で置換した後、室温で攪拌しながらトルエン990gと1,2-ジメトキシエタン11.2gを加え、続いて、イソブチルビス(2,6-ジ-ブチル-4-メチルフェノキシ)アルミニウム15.6mmolを含有するトルエン溶液31.1gを加え、さらにsec-ブチルリチウム1.39molを含有するsec-ブチルリチウムのシクロヘキサン溶液0.82gを加えた。
(2)続いて、これにメタクリル酸メチル11.0gを加えた。反応液は当初、黄色に着色していたが、室温にて60分間攪拌後には無色となった。
(3)引き続き、重合液の内部温度を-30℃に冷却し、アクリル酸2-エチルヘキシル157gを2時間かけて滴下し、滴下終了後-30℃にて5分間攪拌した。
(4)さらに、これにメタクリル酸メチル12.4gを加え、一晩室温にて攪拌した。
(5)メタノール17.3gを添加して重合反応を停止した後、得られた反応液15kgのメタノール中に注ぎ、白色沈殿物を析出させた。その後、白色沈殿物を回収し、乾燥させることにより、アクリル系ブロック共重合体(II-4)180gを得た。
(1)2Lの三口フラスコに三方コックを付け内部を窒素で置換した後、室温で攪拌しながらトルエン936gと1,2-ジメトキシエタン51.4gを加え、続いて、イソブチルビス(2,6-ジ-ブチル-4-メチルフェノキシ)アルミニウム16.5mmolを含有するトルエン溶液32.9gを加え、さらにsec-ブチルリチウム7.00mmolを含有するsec-ブチルリチウムのシクロヘキサン溶液4.10gを加えた。
(2)続いて、これにメタクリル酸メチル65.0gを加えた。反応液は当初、黄色に着色していたが、室温にて60分間攪拌後には無色となった。
(3)引き続き、重合液の内部温度を-30℃に冷却し、アクリル酸n-ブチル226gを2時間かけて滴下し、滴下終了後-30℃にて5分間攪拌した。
(4)さらに、これにメタクリル酸メチル161gを加え、一晩室温にて攪拌した。
(5)メタノール13.7gを添加して重合反応を停止した後、得られた反応液15kgのメタノール中に注ぎ、白色沈殿物を析出させた。その後、白色沈殿物を回収し、乾燥させることにより、アクリル系ブロック共重合体(II'-1)430gを得た。
アクリル系ブロック共重合体(I-1)とアクリル系ブロック共重合体(II-1)、(II-2)、(II-3)または(II-4)とを表2に記載の割合で事前にドライブレンドした混合物を作製し、この混合物を二軸押出機(KRUPP WERNER & PFLEIDERER社製「ZSK-25」)を用いて溶融混練した。得られた溶融混練物を二軸押出機から押し出し、ストランドカット方式によりペレット化した。得られたペレットを200℃にて熱プレス成型し、150mm×150mm×厚み1mmのプレスシート(成形体)を作製した。得られたプレスシートに対して上記オレイン酸浸漬試験による評価および硬度の測定を実施した。結果を表2に示す。
アクリル系ブロック共重合体(I-1)とアクリル系ブロック共重合体(II-4)又は(II'-1)を表2に記載の割合で事前にドライブレンドした混合物を作製し、この混合物を二軸押出機(KRUPP WERNER & PFLEIDERER社製「ZSK-25」)を用いて溶融混練した。得られた溶融混練物を二軸押出機から押し出し、ストランドカット方式によりペレット化した。得られたペレットを200℃にて熱プレス成型し、150mm×150mm×厚み1mmのプレスシート(成形体)を作製した。得られたプレスシートに対して上記オレイン酸浸漬試験による評価および硬度の測定を実施した。結果を表2に示す。
Claims (5)
- メタクリル酸エステル単位を含む少なくとも1個の重合体ブロック(A1)及びアクリル酸エステル単位を含む少なくとも1個の重合体ブロック(B1)を有するアクリル系ブロック共重合体(I)100質量部と、メタクリル酸メチル単位を含む少なくとも1個の重合体ブロック(A2)及びアクリル酸エステル単位を含む少なくとも1個の重合体ブロック(B2)を有するアクリル系ブロック共重合体(II)15~400質量部とを含む樹脂組成物であり、
前記アクリル系ブロック共重合体(I)中の重合体ブロック(A1)の含有量が20質量%以上であり、
前記アクリル系ブロック共重合体(I)の重合体ブロック(B1)は、一般式CH2=CH-COOR1(1)(式(1)中、R1は炭素数1~3の有機基を表す)で示されるアクリル酸エステル(b1-1)単位を含有し、かつ
前記アクリル系ブロック共重合体(I)は下記式(i)及び(ii)を満たし、
(i) (H)×SP(A1)+(J)×SP(B1)-SP(C)>1.20
(ii) -0.80≦SP(A1)-SP(B1)≦0.43
(前記式(i)及び(ii)中、SP(A1)は重合体ブロック(A1)の溶解度パラメーター(cal/cm3)1/2、SP(B1)は重合体ブロック(B1)の溶解度パラメーター(cal/cm3)1/2を示し、SP(C)はオレイン酸の溶解度パラメーター(cal/cm3)1/2を示し、(H)は重合体ブロック(A1)のアクリル系ブロック共重合体(I)中の質量割合、(J)は重合体ブロック(B1)のアクリル系ブロック共重合体(I)中の質量割合を示す。)
前記アクリル系ブロック共重合体(II)の重合体ブロック(B2)は、一般式CH2=CH-COOR2(2)(式(2)中、R2は炭素数4~12の有機基を表す)で示されるアクリル酸エステル(b2-2)単位を含有し、かつ
アクリル系ブロック共重合体(II)中の重合体ブロック(A2)の含有量が35質量%未満である、
樹脂組成物。 - 前記アクリル系ブロック共重合体(I)及び(II)の重量平均分子量がともに30,000~300,000の範囲である、請求項1に記載の樹脂組成物。
- 前記樹脂組成物を成形して得られる厚み1mm、直径25mmの円柱状試験片を、オレイン酸に浸漬し、25℃で168時間保管前後の質量変化率[(浸漬後の試験片の質量)-(浸漬前の試験片の質量)]/(浸漬前の試験片の質量)×100が200%以下である請求項1又は2に記載の樹脂組成物。
- アクリル系ブロック共重合体(II)中の前記アクリル酸エステル(b2-2)単位がアクリル酸n-ブチル単位である、請求項1~3のいずれか1項に記載の樹脂組成物。
- アクリル系ブロック共重合体(I)中の前記アクリル酸エステル(b1-1)単位がアクリル酸メチル単位である、請求項1~4のいずれか1項に記載の樹脂組成物。
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