WO2011004860A1 - クロロプレン系重合体の製造方法、ポリクロロプレンラテックス、接着剤組成物 - Google Patents
クロロプレン系重合体の製造方法、ポリクロロプレンラテックス、接着剤組成物 Download PDFInfo
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- WO2011004860A1 WO2011004860A1 PCT/JP2010/061607 JP2010061607W WO2011004860A1 WO 2011004860 A1 WO2011004860 A1 WO 2011004860A1 JP 2010061607 W JP2010061607 W JP 2010061607W WO 2011004860 A1 WO2011004860 A1 WO 2011004860A1
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- WIPO (PCT)
- Prior art keywords
- chloroprene
- polymerization
- polychloroprene latex
- weight
- surfactant
- Prior art date
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- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 239000004342 Benzoyl peroxide Substances 0.000 description 1
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 1
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- 229920001174 Diethylhydroxylamine Polymers 0.000 description 1
- FVIGODVHAVLZOO-UHFFFAOYSA-N Dixanthogen Chemical compound CCOC(=S)SSC(=S)OCC FVIGODVHAVLZOO-UHFFFAOYSA-N 0.000 description 1
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000002211 L-ascorbic acid Substances 0.000 description 1
- 235000000069 L-ascorbic acid Nutrition 0.000 description 1
- YIVJZNGAASQVEM-UHFFFAOYSA-N Lauroyl peroxide Chemical compound CCCCCCCCCCCC(=O)OOC(=O)CCCCCCCCCCC YIVJZNGAASQVEM-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- GYCMBHHDWRMZGG-UHFFFAOYSA-N Methylacrylonitrile Chemical compound CC(=C)C#N GYCMBHHDWRMZGG-UHFFFAOYSA-N 0.000 description 1
- JPYHHZQJCSQRJY-UHFFFAOYSA-N Phloroglucinol Natural products CCC=CCC=CCC=CCC=CCCCCC(=O)C1=C(O)C=C(O)C=C1O JPYHHZQJCSQRJY-UHFFFAOYSA-N 0.000 description 1
- 229920001214 Polysorbate 60 Polymers 0.000 description 1
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- LXEKPEMOWBOYRF-UHFFFAOYSA-N [2-[(1-azaniumyl-1-imino-2-methylpropan-2-yl)diazenyl]-2-methylpropanimidoyl]azanium;dichloride Chemical compound Cl.Cl.NC(=N)C(C)(C)N=NC(C)(C)C(N)=N LXEKPEMOWBOYRF-UHFFFAOYSA-N 0.000 description 1
- KYIKRXIYLAGAKQ-UHFFFAOYSA-N abcn Chemical compound C1CCCCC1(C#N)N=NC1(C#N)CCCCC1 KYIKRXIYLAGAKQ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000004996 alkyl benzenes Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 1
- AOPRFYAPABFRPU-UHFFFAOYSA-N amino(imino)methanesulfonic acid Chemical compound NC(=N)S(O)(=O)=O AOPRFYAPABFRPU-UHFFFAOYSA-N 0.000 description 1
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229960005070 ascorbic acid Drugs 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 229940077388 benzenesulfonate Drugs 0.000 description 1
- 235000019400 benzoyl peroxide Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- WPKWPKDNOPEODE-UHFFFAOYSA-N bis(2,4,4-trimethylpentan-2-yl)diazene Chemical compound CC(C)(C)CC(C)(C)N=NC(C)(C)CC(C)(C)C WPKWPKDNOPEODE-UHFFFAOYSA-N 0.000 description 1
- LBSPZZSGTIBOFG-UHFFFAOYSA-N bis[2-(4,5-dihydro-1h-imidazol-2-yl)propan-2-yl]diazene;dihydrochloride Chemical compound Cl.Cl.N=1CCNC=1C(C)(C)N=NC(C)(C)C1=NCCN1 LBSPZZSGTIBOFG-UHFFFAOYSA-N 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- PVEOYINWKBTPIZ-UHFFFAOYSA-N but-3-enoic acid Chemical compound OC(=O)CC=C PVEOYINWKBTPIZ-UHFFFAOYSA-N 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- KBLWLMPSVYBVDK-UHFFFAOYSA-N cyclohexyl prop-2-enoate Chemical compound C=CC(=O)OC1CCCCC1 KBLWLMPSVYBVDK-UHFFFAOYSA-N 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- FVCOIAYSJZGECG-UHFFFAOYSA-N diethylhydroxylamine Chemical compound CCN(O)CC FVCOIAYSJZGECG-UHFFFAOYSA-N 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- USIUVYZYUHIAEV-UHFFFAOYSA-N diphenyl ether Natural products C=1C=CC=CC=1OC1=CC=CC=C1 USIUVYZYUHIAEV-UHFFFAOYSA-N 0.000 description 1
- ZPWVASYFFYYZEW-UHFFFAOYSA-L dipotassium hydrogen phosphate Chemical compound [K+].[K+].OP([O-])([O-])=O ZPWVASYFFYYZEW-UHFFFAOYSA-L 0.000 description 1
- KCIDZIIHRGYJAE-YGFYJFDDSA-L dipotassium;[(2r,3r,4s,5r,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl] phosphate Chemical compound [K+].[K+].OC[C@H]1O[C@H](OP([O-])([O-])=O)[C@H](O)[C@@H](O)[C@H]1O KCIDZIIHRGYJAE-YGFYJFDDSA-L 0.000 description 1
- 239000002526 disodium citrate Substances 0.000 description 1
- 235000019262 disodium citrate Nutrition 0.000 description 1
- 229940079896 disodium hydrogen citrate Drugs 0.000 description 1
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 description 1
- CEYULKASIQJZGP-UHFFFAOYSA-L disodium;2-(carboxymethyl)-2-hydroxybutanedioate Chemical compound [Na+].[Na+].[O-]C(=O)CC(O)(C(=O)O)CC([O-])=O CEYULKASIQJZGP-UHFFFAOYSA-L 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 229960002377 dixanthogen Drugs 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229910052571 earthenware Inorganic materials 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- XWNVSPGTJSGNPU-UHFFFAOYSA-N ethyl 4-chloro-1h-indole-2-carboxylate Chemical compound C1=CC=C2NC(C(=O)OCC)=CC2=C1Cl XWNVSPGTJSGNPU-UHFFFAOYSA-N 0.000 description 1
- AMFIBVNSEBYBAM-UHFFFAOYSA-N ethylcarbamothioylsulfanyl n-ethylcarbamodithioate Chemical compound CCNC(=S)SSC(=S)NCC AMFIBVNSEBYBAM-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- NVVZQXQBYZPMLJ-UHFFFAOYSA-N formaldehyde;naphthalene-1-sulfonic acid Chemical compound O=C.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 NVVZQXQBYZPMLJ-UHFFFAOYSA-N 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000008282 halocarbons Chemical class 0.000 description 1
- PBZROIMXDZTJDF-UHFFFAOYSA-N hepta-1,6-dien-4-one Chemical compound C=CCC(=O)CC=C PBZROIMXDZTJDF-UHFFFAOYSA-N 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 125000004029 hydroxymethyl group Chemical group [H]OC([H])([H])* 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 229960003505 mequinol Drugs 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- ZQMHJBXHRFJKOT-UHFFFAOYSA-N methyl 2-[(1-methoxy-2-methyl-1-oxopropan-2-yl)diazenyl]-2-methylpropanoate Chemical compound COC(=O)C(C)(C)N=NC(C)(C)C(=O)OC ZQMHJBXHRFJKOT-UHFFFAOYSA-N 0.000 description 1
- 125000000250 methylamino group Chemical group [H]N(*)C([H])([H])[H] 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- OMNKZBIFPJNNIO-UHFFFAOYSA-N n-(2-methyl-4-oxopentan-2-yl)prop-2-enamide Chemical compound CC(=O)CC(C)(C)NC(=O)C=C OMNKZBIFPJNNIO-UHFFFAOYSA-N 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- ZWWQICJTBOCQLA-UHFFFAOYSA-N o-propan-2-yl (propan-2-yloxycarbothioyldisulfanyl)methanethioate Chemical compound CC(C)OC(=S)SSC(=S)OC(C)C ZWWQICJTBOCQLA-UHFFFAOYSA-N 0.000 description 1
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 description 1
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 description 1
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- QCDYQQDYXPDABM-UHFFFAOYSA-N phloroglucinol Chemical compound OC1=CC(O)=CC(O)=C1 QCDYQQDYXPDABM-UHFFFAOYSA-N 0.000 description 1
- DOIRQSBPFJWKBE-UHFFFAOYSA-N phthalic acid di-n-butyl ester Natural products CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 235000011056 potassium acetate Nutrition 0.000 description 1
- 229960004109 potassium acetate Drugs 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 239000001508 potassium citrate Substances 0.000 description 1
- QEEAPRPFLLJWCF-UHFFFAOYSA-K potassium citrate (anhydrous) Chemical compound [K+].[K+].[K+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O QEEAPRPFLLJWCF-UHFFFAOYSA-K 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- FZYCEURIEDTWNS-UHFFFAOYSA-N prop-1-en-2-ylbenzene Chemical compound CC(=C)C1=CC=CC=C1.CC(=C)C1=CC=CC=C1 FZYCEURIEDTWNS-UHFFFAOYSA-N 0.000 description 1
- QLNJFJADRCOGBJ-UHFFFAOYSA-N propionamide Chemical compound CCC(N)=O QLNJFJADRCOGBJ-UHFFFAOYSA-N 0.000 description 1
- 229940080818 propionamide Drugs 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000010526 radical polymerization reaction Methods 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229960004889 salicylic acid Drugs 0.000 description 1
- 238000000790 scattering method Methods 0.000 description 1
- 235000015424 sodium Nutrition 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 229960004249 sodium acetate Drugs 0.000 description 1
- 229960004599 sodium borate Drugs 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000001509 sodium citrate Substances 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- PJANXHGTPQOBST-UHFFFAOYSA-N stilbene Chemical group C=1C=CC=CC=1C=CC1=CC=CC=C1 PJANXHGTPQOBST-UHFFFAOYSA-N 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- XJAJNAQBHCNNBM-UHFFFAOYSA-N sulfo hydrogen sulfate dihydrate Chemical compound O.O.OS(=O)(=O)OS(O)(=O)=O XJAJNAQBHCNNBM-UHFFFAOYSA-N 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- WMXCDAVJEZZYLT-UHFFFAOYSA-N tert-butylthiol Chemical compound CC(C)(C)S WMXCDAVJEZZYLT-UHFFFAOYSA-N 0.000 description 1
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 1
- 150000004685 tetrahydrates Chemical class 0.000 description 1
- NJRXVEJTAYWCQJ-UHFFFAOYSA-N thiomalic acid Chemical compound OC(=O)CC(S)C(O)=O NJRXVEJTAYWCQJ-UHFFFAOYSA-N 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 235000015870 tripotassium citrate Nutrition 0.000 description 1
- 229910000404 tripotassium phosphate Inorganic materials 0.000 description 1
- 235000019798 tripotassium phosphate Nutrition 0.000 description 1
- BSVBQGMMJUBVOD-UHFFFAOYSA-N trisodium borate Chemical compound [Na+].[Na+].[Na+].[O-]B([O-])[O-] BSVBQGMMJUBVOD-UHFFFAOYSA-N 0.000 description 1
- HRXKRNGNAMMEHJ-UHFFFAOYSA-K trisodium citrate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O HRXKRNGNAMMEHJ-UHFFFAOYSA-K 0.000 description 1
- 229940038773 trisodium citrate Drugs 0.000 description 1
- 235000019263 trisodium citrate Nutrition 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 229910000406 trisodium phosphate Inorganic materials 0.000 description 1
- 235000019801 trisodium phosphate Nutrition 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- FUSUHKVFWTUUBE-UHFFFAOYSA-N vinyl methyl ketone Natural products CC(=O)C=C FUSUHKVFWTUUBE-UHFFFAOYSA-N 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J111/00—Adhesives based on homopolymers or copolymers of chloroprene
- C09J111/02—Latex
-
- 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
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
-
- 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
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
-
- 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
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
- C08F2/26—Emulsion polymerisation with the aid of emulsifying agents anionic
-
- 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
- C08F36/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
- C08F36/02—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
- C08F36/04—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
- C08F36/14—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated containing elements other than carbon and hydrogen
- C08F36/16—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated containing elements other than carbon and hydrogen containing halogen
- C08F36/18—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated containing elements other than carbon and hydrogen containing halogen containing chlorine
Definitions
- the present invention provides a method for producing a chloroprene polymer by polymerization in an aqueous medium, and a polychloroprene latex that is obtained by this method and that is extremely excellent in adhesive properties.
- Adhesives based on polychloroprene were mainly solvent type, but solvent type adhesives are mainly dissolved in organic solvents such as toluene, hexane, ethyl acetate, methyl ethyl ketone, cyclohexane, etc. Problems have been pointed out. Therefore, although so-called water-based adhesives that do not use organic solvents are actively developed, conventional polychloroprene latex has a problem of insufficient adhesion and water resistance.
- Conventional polychloroprene latex uses rosin acid soap, sodium alkyl sulfate, higher alcohol sulfate ester sodium, polyoxyethylene alkyl ether, alkylamine salt, quaternary ammonium salt, polyvinyl alcohol, and other emulsifiers, and chloroprene or chloroprene and chloroprene
- rosin acid soap sodium alkyl sulfate
- higher alcohol sulfate ester sodium sodium
- polyoxyethylene alkyl ether alkylamine salt
- quaternary ammonium salt polyvinyl alcohol
- chloroprene or chloroprene and chloroprene A so-called emulsion polymerization mechanism has been used in which a copolymerizable monomer is emulsified in water and then chloroprene is polymerized by adding a radical initiator such as potassium persulfate.
- Soap-free polymerization is known as a method for obtaining polymer particles without using an emulsifier.
- Soap-free polymerization is a polymer fine particle synthesis method using water as a solvent and no soap, ie, soap, and has been used as an applied technology to non-polluting adhesives, pressure-sensitive adhesives, ink industries and the like.
- the difference between emulsion polymerization and soap-free polymerization is the presence or absence of micelles formed by soap molecules. Even if an emulsifier is added below the critical micelle concentration (CMC), the polymerization mechanism is It becomes soap-free polymerization.
- CMC critical micelle concentration
- the surfactant is ion-dispersed while the concentration is very low in the aqueous solution, but when the concentration increases and reaches the saturation value of the dispersion, a stable micelle is formed in the aqueous solution by association, and the concentration is increased.
- the concentration at which micelles are formed is in a very narrow range, and this is called the critical micelle concentration (hereinafter abbreviated as CMC).
- CMC varies depending on the type of surfactant, the temperature of the surfactant aqueous solution, the salt concentration in the surfactant aqueous solution, and other external conditions, but the value is about 10 ⁇ 5 mol / l to 10 ⁇ 2 mol / l. Have. Details of CMC relating to various surfactants are described in the new surfactant handbook (published by Engineering Books Co., Ltd.). However, there is no disclosure regarding soap-free polymerization using chloroprene.
- Patent Document 1 a method in which a hydrophobic vinyl monomer is polymerized in an aqueous medium in the absence of an emulsifier.
- the disclosed contents are mostly about monomers such as styrene, methyl methacrylate, n-butyl methacrylate, etc.
- soap-free polymerization using chloroprene and chloroprene is soap-free in the absence of an emulsifier.
- polychloroprene latex containing almost no emulsifier for example, a method using a polychloroprene random copolymer having a hydrophilic group (Patent Document 2), an appropriate amount of hydrophilicity A method of using a polychloroprene-based polymer having an acidic functional group at the terminal in the presence of an acidic solvent (Patent Document 3) has been reported.
- the present inventor made surfactants (including emulsifiers and dispersants) present in an aqueous medium, and made the addition amount less than the critical micelle concentration (CMC), soap-free polymerization.
- CMC critical micelle concentration
- the mechanism was used to produce a chloroprene-based polymer (polychloroprene latex), to find a more stable and simple method for obtaining polychloroprene latex, and to further greatly improve conventional problems such as initial adhesive strength.
- the invention has been completed.
- the present invention polymerizes chloroprene or monomers capable of copolymerizing with chloroprene and chloroprene in an aqueous medium in the presence of a surfactant and containing the surfactant less than the critical micelle concentration (CMC).
- CMC critical micelle concentration
- an anionic surfactant may be initially added as a surfactant before polymerization of chloroprene.
- a to B mean A or more and B or less, and when no unit is added to A, the unit of A is the same as the unit of B (%, ⁇ m, etc.).
- this invention is the polychloroprene latex manufactured by the said manufacturing method, and is also an adhesive composition containing the polychloroprene latex.
- the present invention it is possible to polymerize chloroprene in an aqueous medium without requiring a large amount of a surfactant (including an emulsifier and a dispersant) in the polymerization process and without introducing a hydrophilic group having a surface-active ability.
- a polychloroprene latex having less adhesion and good adhesive properties such as initial adhesive strength can be obtained.
- the manufacturing process is simpler than in the past.
- polymer particles having an average particle size of 0.05 to 2 ⁇ m can be synthesized, and a chloroprene polymer having a wide particle size distribution of 1 to 30%. It is possible to obtain a polymer.
- the polychloroprene latex obtained by the present invention has remarkably improved adhesive properties, and the same or different types of paper, wood, cloth, jersey, leather, leather, rubber, plastic, foam, earthenware, glass, cement substrate and metal. It is suitable for joining.
- FIG. 2 is a graph showing the particle size distribution of the polychloroprene latex obtained in Example 1.
- FIG. 4 is a graph showing the particle size distribution of the polychloroprene latex obtained in Example 2.
- 4 is a graph showing the particle size distribution of the polychloroprene latex obtained in Example 3.
- 4 is a graph showing the particle size distribution of the polychloroprene latex obtained in Example 4.
- 4 is a graph showing the particle size distribution of a polychloroprene latex obtained in Comparative Example 2.
- 6 is a graph showing the particle size distribution of the polychloroprene latex obtained in Comparative Example 3.
- Surfactants used in the present invention are not particularly limited, and known surfactants include anionic surfactants, nonionic surfactants, and cationic surfactants.
- anionic surfactant include rosinate, higher fatty acid salt, alkenyl succinate, sodium alkyl sulfate, sodium higher alcohol sulfate, alkyl benzene sulfonate, alkyl diphenyl ether disulfonate, higher Examples include fatty acid amide sulfonates, higher fatty acid alkylolamide sulfates, and alkyl sulfobetaines.
- Nonionic surfactants include polyoxyethylene alkyl ethers, polyoxyethylene sorbitan fatty acid esters, higher fatty acid alkanolamides. , Poly Alkenyl alcohols, etc.
- Examples of the cationic surfactants include alkylamine salts, quaternary ammonium salts and the like.
- the main polymerization is characterized by polymerizing these surfactants in the presence of an aqueous medium.
- the surfactant in an amount of 0.00001 part by weight or more and less than CMC with respect to 100 parts by weight of the aqueous medium.
- the addition amount of the surfactant is less than 0.00001 parts by weight, a large amount of polymer (adhered matter) adheres to the polymerization reactor, resulting in an extremely low yield and a cause of container contamination.
- the addition amount of the surfactant becomes CMC or more, the decrease in adhesive strength becomes remarkable.
- CMC refers to CMC in pure water.
- CMC of sodium dodecylbenzenesulfonate is 1.2 mmol / dm 3 H 2 O (by electrical conductivity method) at 60 ° C. in pure water
- CMC of sodium dodecyl sulfate (SDS) is 8.1 mmol / dm 3 H 2 O (by surface tension method) at 50 ° C. in pure water.
- CMC by surface tension method
- pure water of 50 ° C. is employed regardless of the temperature at which the aqueous medium is actually used. Even when the aqueous medium actually used contains a substance other than water, the aqueous medium is assumed to be pure water, and the surfactant concentration in the aqueous medium is set to be less than CMC at 50 ° C. pure water. .
- the surfactant is SDS
- the CMC of SDS is 8.1 mmol / dm 3 H 2 O at 50 ° C. in pure water, so 8.1 mmol of SDS in 1 dm 3 of an aqueous medium (including water and other solvents). Add less.
- the CMC of the surfactant having the lowest CMC is set as the upper limit of the total surfactant addition amount. That is, the total amount of the surfactant in the aqueous medium is set to be less than the CMC.
- a surfactant A of the CMC 1mmol / dm 3 H 2 O, when the CMC using surfactants B of 2mmol / dm 3 H 2 O, surfactant A, the total concentration of B 1 mmol / dm Less than 3 H 2 O.
- the aqueous medium used in the present invention is a medium containing 50% by weight or more of water, and an organic solvent such as alcohol may be added, but the content of water in the aqueous medium is preferably 90% by weight or more.
- the addition amount of the organic solvent is 10% by weight or more and the water content is less than 90% by weight, the properties of the chloroprene latex are adversely affected.
- the addition method of the surfactant is not particularly limited, and can be appropriately changed depending on the purpose of monodispersing the particles or enlarging the particle size.
- a method of initially adding an anionic surfactant in the vicinity of CMC before polymerization is suitable.
- chloroprene is a chloroprene monomer, specifically 2-chloro-1,3, butadiene.
- Examples of the monomer (monomer) copolymerizable with chloroprene include 2,3-dichloro-1,3-butadiene, 2-cyano-1,3-butadiene, and 1-chloro-1,3-butadiene.
- 1,3-butadienes such as 1,3-butadiene and isoprene, styrene, ⁇ -methylstyrene, p-chloromethylstyrene, p-cyanostyrene, p-acetoxystyrene, p-styrenesulfonyl chloride, ethyl p-styrene Styrenes such as sulfonyl, p-butoxystyrene, 4-vinylbenzoic acid, 3-isopropenyl- ⁇ , ⁇ '-dimethylbenzyl isocyanate, methyl methacrylate, glycidyl methacrylate, 2-hydroxyethyl methacrylate, 2-methacrylic acid 2- Hydroxypropyl, 4-hydroxybutyl methacrylate, 2- (dimethacrylate) Methylamino) ethyl, 2- (diethylamino) ethyl methacrylate,
- 2,3-dichloro-1,3-butadiene, 2-cyano-1,3-butadiene, 1-chloro-1,3-butadiene, styrene, radical polymerization with chloroprene is relatively high.
- Methyl methacrylate, methacrylic acid, glycidyl methacrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 4-hydroxybutyl methacrylate, ⁇ -cyanoethyl acrylate, maleic anhydride and maleic acid are preferred.
- 2,3-dichloro-1,3-butadiene which has the highest copolymerizability with chloroprene.
- these can also be used together 2 or more types as needed.
- the addition amount of chloroprene and a monomer copolymerizable with chloroprene is preferably 1 to 50 parts by weight with respect to 100 parts by weight of the aqueous medium. In this range, a particularly stable polychloroprene latex can be obtained.
- the method for adding chloroprene is not particularly limited. However, when it is desired to increase the polymerization rate by increasing the polymerization rate, a part of chloroprene is continuously or intermittently added to the polymerization system during the polymerization. The method is preferred. For example, 10 to 50 parts by weight of 100 parts by weight of chloroprene is added to the polymerization system to start the polymerization, and from the time when the conversion rate reaches 1 to 40% until the polymerization is completed, the polymerization temperature is exceeded. The remaining monomer maintained at a low temperature may be continuously added into the polymerization system for polymerization.
- chloroprene can be polymerized without adjustment such as neutralization. That is, in the present invention, chloroprene can be continuously polymerized in the same aqueous medium to obtain a chloroprene polymer.
- the chloroprene polymer in the present invention refers to a chloroprene homopolymer, a copolymer of chloroprene and a monomer copolymerizable therewith.
- the gel content of the polychloroprene latex can be adjusted by controlling the amount of chain transfer agent used when polymerizing chloroprene, the polymerization temperature and the polymerization rate. In order to increase the gel content, the chain transfer agent What is necessary is just to take measures, such as reducing the usage-amount of this, raising the polymerization temperature, and enlarging a polymerization rate.
- the chain transfer agent is not particularly limited as long as it is generally used in the production of polychloroprene.
- Well-known chain transfer agents such as sulfur can be used.
- Examples of the catalyst used for the polymerization of polychloroprene include peroxides such as benzoyl peroxide, lauroyl peroxide, t-butyl hydroperoxide, paramentane hydroperoxide, dicumyl peroxide, potassium persulfate, and ammonium persulfate.
- peroxides such as benzoyl peroxide, lauroyl peroxide, t-butyl hydroperoxide, paramentane hydroperoxide, dicumyl peroxide, potassium persulfate, and ammonium persulfate.
- the amount of these can be determined as appropriate, but is preferably about 0.01 to 10 parts by weight with respect to 100 parts by weight of chloroprene.
- 10 parts by weight or more of the ionic initiator is added, the ionic strength becomes too high and the particles are liable to become unstable.
- Addition methods such as collective addition, dripping addition, divided addition, or these combination, are mentioned.
- polychloroprene latex for example, thiodiphenylamine, diethylhydroxylamine, hydroquinone, pt-butylcatechol, 1,3,5-trihydroxybenzene, hydroquinone methyl ether, 2,6-di-t -Butyl-4-methylphenol, 2,2-methylenebis (6-t-4-methylphenol), 4,4-butylenebis (6-t-butyl-3-methylphenol), ethylenebis (oxyethylene) bis [ 3- (5-tert-butyl-4-hydroxy-m-tolyl) propionate], octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, pentaerythritol tetrakis [3- (3 , 5-Di-tert-butyl-4-hydroxyphenyl) propio
- the polymerization inhibitor over preparative], etc. may be added.
- the polymerization temperature is preferably in the range of 0 to 55 ° C. for polymerization control. In order to carry out the polymerization reaction more smoothly and safely, the polymerization temperature is particularly preferably 30 to 50 ° C.
- the polymerization time can be appropriately adjusted according to the particle size of the target polychloroprene latex and is not particularly limited, but is usually about 1 to 36 hours.
- the solid content concentration of polychloroprene latex can be adjusted to the required concentration by concentration or dilution with water. By setting a higher solid content concentration, the latex has a high drying speed and excellent initial strength. In addition, about solid content concentration, it can adjust also with the ratio with the monomer at the time of superposition
- a salt of a weak acid is preferable.
- inorganic salts such as dipotassium, trisodium citrate, disodium hydrogen citrate, sodium acetate, potassium acetate, and sodium borate.
- the pH adjuster may be sodium hydroxide or potassium hydroxide, or a basic substance such as diethanolamine.
- the method for adding the PH adjuster is not particularly limited, and the PH adjuster powder can be added directly or diluted to an arbitrary ratio with water.
- the polychloroprene latex obtained in the present invention is stable, but in order to further stabilize the basic characteristics of the polychloroprene latex, an anti-scale adhesion agent is used on the inner surface of the polymerization can used for polymerization and the inner surface of the attached equipment of the polymerization can. May be applied to form a coating film.
- an anti-scale adhesion agent a compound having a hydroxy naphthalene compound can be used, and examples thereof include NOXOLOWSW, NOXOL ETH, and NOXOL ETH / S manufactured by CIRS.
- Examples of the application method of the scale adhesion preventing agent include application using a roller, a brush, and the like, and spraying using a known atomizer such as a spray or a steam ejector.
- the coating amount in consideration of the effect and economy, 0.001 ⁇ 0.5g / m 2 as solid content of the scale preventive agent, preferably in the range of 0.003 ⁇ 0.3g / m 2.
- it may be heated at a temperature of 50 to 150 ° C. If any contaminants that interfere with the formation of the coating film are foreseen on the inner surface of the polymerization can during application, clean the surface with an organic solvent or detergent, rinse with pure water, etc. It is preferable to expose the surface and the like.
- the effect can be further manifested by washing away the excess material remaining on the inner surface of the polymerization can with pure water.
- One or more polymerization operations can be performed until the effect is attenuated by one application.
- the frequency of application varies depending on the use conditions, and it is preferable to perform reapplication before the effect is attenuated.
- the coating film is preferably formed in an inert gas atmosphere such as nitrogen gas or argon gas.
- the material of the polymerization can is stainless steel or the like, and may be glass lining or rubber lining.
- the polymerization reactor in the present invention a generally used 1500 ml glass four-necked separable flask, tilted paddle, thermometer, cooling pipe, and nitrogen vent pipe were used.
- the stirring blade used was equipped with 4 plate-like baffles.
- DBS sodium dodecylbenzenesulfonate
- Neoperex G-65 sodium dodecylbenzenesulfonate
- the CMC of DBS is about 0.4 parts by weight (about 0.04 parts by weight in terms of 100 parts by weight of 50 ° C. pure water).
- the particle size distribution of the latex was measured as follows. [Particle size distribution measurement] The latex immediately after completion of the polymerization reaction was diluted and adjusted with distilled water so that the solid content concentration was 0.05% by mass, the particle size distribution was measured with Microtrac UPA (Nikkiso Co., Ltd.), and the average particle size And the degree of dispersion Cv of the particles.
- the obtained latex was subjected to the following measurement without adjusting the viscosity.
- [Adhesion test] Canvas to (25 ⁇ 150 mm) 2 sheets each, 150 g (solids) / m is applied to the second adhesive composition with a spatula, allowed to stand at room temperature for 10 minutes, a hand roller 5 reciprocally bonded to the coated surface in a completely wet state And crimped. About this, the following adhesive strength evaluation test was done.
- Example 2 The experiment was performed in the same manner as in Example 1 except that the polymerization temperature was changed to 50 ° C. in Example 1.
- the polymerization conversion rate of chloroprene reached 85% at 8.5 hours after the initiation of polymerization. During the latex recovery, slight deposits were confirmed. Unreacted monomers were removed by a rotary evaporator to obtain polychloroprene latex.
- the latex particle size distribution and the initial peel strength were measured in the same manner as in Example 1.
- the measurement results of Example 2 are shown in Table 1 below, and the particle size distribution is shown in FIG.
- Example 3 809.7 parts by weight of pure water obtained by adding 0.1 part by weight of sodium dodecyl sulfate (hereinafter abbreviated as SDS) to 1500 ml of glass Kolben equipped with a three-way cock was charged.
- SDS CMC sodium dodecyl sulfate
- the SDS CMC is about 2.4 parts by weight (about 0.3 parts by weight in terms of 100 parts by weight of 50 ° C. pure water).
- 100 parts by weight of chloroprene was charged, and the temperature was raised to an internal temperature of 40 ° C. under 300 rpm stirring conditions.
- Example 3 After the temperature elevation, polymerization was started by adding an initiator aqueous solution consisting of 4.44 parts by weight of KPS, 0.178 parts by weight of sodium anthraquinone ⁇ sulfonate and 217.5 parts by weight of pure water. At 10.5 hours from the start of polymerization, the polymerization conversion of chloroprene reached 85%. During the latex recovery, slight deposits were confirmed. Unreacted monomers were removed by a rotary evaporator to obtain polychloroprene latex. The latex particle size distribution and the initial peel strength were measured in the same manner as in Example 1. The measurement results of Example 3 are shown in Table 1 below, and the particle size distribution is shown in FIG.
- Example 4 In Example 3, an experiment was performed in the same manner as in Example 3 except that SDS was changed to 0.296 parts by weight. At 6 hours from the start of polymerization, the polymerization conversion of chloroprene reached 91%. During the latex recovery, almost no deposit was observed. Unreacted monomers were removed by a rotary evaporator to obtain polychloroprene latex. The same SDS as in Example 3 was used. That is, the CMC of SDS used in Example 4 is about 2.4 parts by weight (about 0.3 parts by weight in terms of 100 parts by weight of 50 ° C. pure water). The latex particle size distribution and the initial peel strength were measured in the same manner as in Example 1. The measurement results of Example 4 are shown in Table 1 below, and the particle size distribution is shown in FIG.
- the former When comparing the results of Examples 1 to 4 and Comparative Examples 2 and 3, the former has a larger particle size than the latter, and the particles are monodispersed. When comparing the initial peel strength, the former has a remarkable initial adhesive strength, whereas the latter does not express the initial strength at all. It is apparent that the initial adhesive strength of the adhesive composition is improved by making the amount of the surfactant added less than CMC.
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Abstract
Description
しかし、これまでにクロロプレンを用いたソープフリー重合に関する開示はない。
本発明ではソープフリー重合機構でクロロプレンラテックスを製造するため、当該技術と重合機構が大きく異なっている。また、これら技術では、末端特性のポリクロロプレン系共重合体を合成する工程と、得られたポリクロロプレン系共重合体を用いてポリクロロプレンラテックスを製造する工程との二段階工程からなり、実工業的に不利な側面を有している。
また、本発明は、クロロプレン又は、クロロプレン及びクロロプレンと共重合可能なモノマーの重合により、クロロプレン系重合体の粒子を製造する際に、粒子の分散度Cv(=標準偏差/平均粒子径×100)を、1~30%の範囲にすることもできるし、粒子の平均粒子径を、0.05~2μmの範囲にすることもできる。本発明においては、界面活性剤として、アニオン性界面活性剤を、クロロプレンの重合前に初期添加することも可能である。なお、本発明でA~Bとは、A以上B以下の意味であり、Aに単位を付さない場合、Aの単位はBの単位(%、μm等)と同じとする。
さらに、本発明は上記製造方法により製造されたポリクロロプレンラテックスであり、そのポリクロロプレンラテックスを含有する接着剤組成物でもある。
ここでいうCMCとは、純水中におけるCMCを指し、例えば、ドデシルベンゼンスルホン酸ナトリウム(DBS)のCMCは純水60℃で1.2mmol/dm3H2O(電気伝導度法による)、ドデシル硫酸ナトリウム(SDS)のCMCは純水50℃で8.1mmol/dm3H2O(表面張力法による)である。
三方コックを備えた1500mlのガラスコルベンに、ドデシルベンゼンスルホン酸ナトリウム(以下、DBSと略称、商品名:ネオぺレックスG-65、花王(株)製品)0.02重量部を加えた純水918.5重量部を仕込んだ。この添加量は、ネオぺレックスG-65としての添加量であり、DBSの純分換算ではない。このDBSのCMCは約0.4重量部(50℃の純水100重量部換算では約0.04重量部)である。
[粒径分布測定]
重合反応を終了させた直後のラテックスを、固形分濃度が0.05質量%となるように蒸留水で希釈調整し、Microtrac UPA(日機装株式会社製)によって粒径分布を測定し、平均粒子径、および粒子の分散度Cvを求めた。ここで、ラテックスの平均粒子径は、レーザー回折散乱法によるD50%粒子径(体積基準による累積粒子分布が50%となる粒子径=中位径またはメディアン径とも呼ぶ)を指す。また、粒子の分散度は簡易的に下式によって求めた。
分散度Cv=(標準偏差/平均粒子径×100)
〔接着試験〕
帆布(25×150mm)2枚各々に、150g(固形分)/m2の接着剤組成物をヘラで塗布し、室温で10分間放置後、完全なウェット状態で塗布面を張り合わせハンドローラー5往復させて圧着した。これについて、以下の接着力評価試験を行った。
室温下、ローラー圧着後10分間のセットタイムをとった後、引張り試験機を用い、引張り速度200mm/分で180°剥離強度を測定した。実施例1の測定結果を下記表1に、粒径分布を図1に示した。
実施例1において、重合温度を50℃に変更した以外は、実施例1と同様に実験を行った。重合開始8.5時間でクロロプレンの重合転化率は85%に達した。ラテックス回収の際、わずかに付着物の発生が確認された。ロータリーエバポレーターで未反応モノマーを除去しポリクロロプレンラテックスを得た。実施例1と同様にしてラテックスの粒径分布、及び初期剥離強度の測定を行った。実施例2の測定結果を下記表1に、粒径分布を図2に示した。
三方コックを備えた1500mlのガラスコルベンに、ドデシル硫酸ナトリウム(以下、SDSと略称)0.1重量部を加えた純水809.7重量部を仕込んだ。このSDSのCMCは約2.4重量部(50℃の純水100重量部換算では約0.3重量部)である。SDSを添加し、十分な窒素バブリングを行った後、クロロプレン100重量部を仕込み、300rpm攪拌条件下、内温40℃まで昇温した。昇温後、次いでKPS4.44重量部、アントラキノンβスルホン酸ナトリウム0.178重量部と純水217.5重量部からなる開始剤水溶液を一括添加して重合を開始した。重合開始10.5時間で、クロロプレンの重合転化率は85%に到達した。ラテックス回収の際、わずかに付着物の発生が確認された。ロータリーエバポレーターで未反応モノマーを除去しポリクロロプレンラテックスを得た。実施例1と同様にしてラテックスの粒径分布、及び初期剥離強度の測定を行った。実施例3の測定結果を下記表1に、粒径分布を図3に示した。
実施例3において、SDSを0.296重量部に変更した以外は、実施例3と同様に実験を行った。重合開始6時間で、クロロプレンの重合転化率は91%に到達した。ラテックス回収の際、付着物の発生はほとんど見られなかった。ロータリーエバポレーターで未反応モノマーを除去しポリクロロプレンラテックスを得た。SDSは実施例3と同じ物を用いた。即ち、実施例4で用いたSDSのCMCは約2.4重量部(50℃の純水100重量部換算では約0.3重量部)である。実施例1と同様にしてラテックスの粒径分布、及び初期剥離強度の測定を行った。実施例4の測定結果を下記表1に、粒径分布を図4に示した。
三方コックを備えた1500mlのガラスコルベンに、純水918.5重量部を仕込んだ。次に、十分な窒素バブリングを行った後、クロロプレン100重量部を仕込み、300rpm攪拌条件下、内温40℃まで昇温した。昇温後、次いでKPS2.22重量部、アントラキノンβスルホン酸ナトリウム0.089重量部と純水108.7重量部からなる開始剤水溶液を一括添加し重合を開始した。しかし、重合開始18時間程で、重合缶内に過剰な付着物が確認されたため重合を停止させた。
三方コックを備えた1500mlのガラスコルベンを用いて、窒素雰囲気下で、純水96重量部にポリビニルアルコール(PVA-203:クラレ製)3.5重量部を60℃で溶解させた。PVA-203のCMCは約0.03重量部(50℃の純水100質量部換算でも約0.03重量部)である。このポリビニルアルコール水溶液を室温近くまで冷却した後、この中にクロロプレン97重量部、メタクリル酸3.0重量部、オクチルメルカプタン0.4重量部を加えた。これを45℃に保持しながら亜硫酸ナトリウムとKPSを開始剤として重合を開始した。重合開始14時間でクロロプレンの重合転化率は99%まで到達した。ロータリーエバポレーターで未反応モノマーを除去しポリクロロプレンラテックスを得た。実施例1と同様にしてラテックスの粒径分布、及び初期剥離強度の測定を行った。比較例2の測定結果を下記表1に、粒径分布を図5に示した。
三方コックを備えた1500mlのガラスコルベンを用いて、窒素気流下で、純水100重量部、不均化ロジン酸4.0重量部、水酸化カリウム1.0重量部、ホルムアルデヒドナフタレンスルホン酸縮合物のナトリウム塩0.8重量部を仕込み、溶解後、撹拌しながらクロロプレン100重量部とn-ドデシルメルカプタン0.1重量部を加えた。この不均化ロジン酸のCMCは約0.43重量部(50℃の純水100重量部換算でも約0.43重量部)である。過硫酸カリウムを開始剤として用い、窒素雰囲気下、10℃で重合した。重合開始5時間でクロロプレンの重合転化率は90%まで到達した。ロータリーエバポレーターで未反応モノマーを除去しポリクロロプレンラテックスを得た。実施例1と同様にしてラテックスの粒径分布、及び初期剥離強度の測定を行った。比較例3の測定結果を下記表1に、粒径分布を図6に示した。
Claims (6)
- 界面活性剤の存在下であって、当該界面活性剤が臨界ミセル濃度(CMC)未満添加された水性媒体中で、クロロプレン又は、クロロプレン及びクロロプレンと共重合可能なモノマーを重合させるクロロプレン系重合体の製造方法。
- クロロプレン又は、クロロプレン及びクロロプレンと共重合可能なモノマーの重合により、クロロプレン系重合体の粒子を製造するクロロプレン系重合体の製造方法であって、
前記粒子の分散度Cv(=標準偏差/平均粒子径×100)が、1~30%の範囲であることを特徴とする、請求項1記載のクロロプレン系重合体の製造方法。 - クロロプレン又は、クロロプレン及びクロロプレンと共重合可能なモノマーの重合により、クロロプレン系重合体の粒子を製造するクロロプレン系重合体の製造方法であって、
前記粒子の平均粒子径が、0.05~2μmの範囲であることを特徴とする、請求項1又は請求項2のいずれか1項記載のクロロプレン系重合体の製造方法。 - 前記界面活性剤として、アニオン性界面活性剤を、前記クロロプレンの重合前に初期添加する請求項1乃至請求項3のいずれか1項記載のクロロプレン系重合体の製造方法。
- 請求項1乃至請求項4のいずれか1項記載の製造方法により製造されるポリクロロプレンラテックス。
- 請求項5記載のポリクロロプレンラテックスを含有することを特徴とする接着剤組成物。
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