WO2008023870A1 - Method of preparing vinyl chloride polymer having superior processability - Google Patents
Method of preparing vinyl chloride polymer having superior processability Download PDFInfo
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- WO2008023870A1 WO2008023870A1 PCT/KR2007/000599 KR2007000599W WO2008023870A1 WO 2008023870 A1 WO2008023870 A1 WO 2008023870A1 KR 2007000599 W KR2007000599 W KR 2007000599W WO 2008023870 A1 WO2008023870 A1 WO 2008023870A1
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- WO
- WIPO (PCT)
- Prior art keywords
- vinyl chloride
- polymerization
- weight part
- preparing
- chloride polymer
- Prior art date
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- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 229920000642 polymer Polymers 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 104
- 239000000178 monomer Substances 0.000 claims description 62
- 238000006243 chemical reaction Methods 0.000 claims description 47
- 239000003963 antioxidant agent Substances 0.000 claims description 16
- 230000003078 antioxidant effect Effects 0.000 claims description 16
- 239000000084 colloidal system Substances 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 7
- 239000003505 polymerization initiator Substances 0.000 claims description 7
- 230000036571 hydration Effects 0.000 claims description 6
- 238000006703 hydration reaction Methods 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 5
- 229920002554 vinyl polymer Polymers 0.000 claims description 5
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 claims description 4
- -1 hy- droquinone Chemical compound 0.000 claims description 4
- 230000000379 polymerizing effect Effects 0.000 claims description 4
- XOUQAVYLRNOXDO-UHFFFAOYSA-N 2-tert-butyl-5-methylphenol Chemical compound CC1=CC=C(C(C)(C)C)C(O)=C1 XOUQAVYLRNOXDO-UHFFFAOYSA-N 0.000 claims description 3
- 125000005670 ethenylalkyl group Chemical group 0.000 claims description 3
- JZODKRWQWUWGCD-UHFFFAOYSA-N 2,5-di-tert-butylbenzene-1,4-diol Chemical compound CC(C)(C)C1=CC(O)=C(C(C)(C)C)C=C1O JZODKRWQWUWGCD-UHFFFAOYSA-N 0.000 claims description 2
- BVCOHOSEBKQIQD-UHFFFAOYSA-N 2-tert-butyl-6-methoxyphenol Chemical compound COC1=CC=CC(C(C)(C)C)=C1O BVCOHOSEBKQIQD-UHFFFAOYSA-N 0.000 claims description 2
- WPEBYKKEDZVOSS-UHFFFAOYSA-N 3-(3-tert-butyl-4-hydroxy-2-methylphenyl)propanoyloxymethyl 3-(3-tert-butyl-4-hydroxy-2-methylphenyl)propanoate Chemical compound C1=CC(O)=C(C(C)(C)C)C(C)=C1CCC(=O)OCOC(=O)CCC1=CC=C(O)C(C(C)(C)C)=C1C WPEBYKKEDZVOSS-UHFFFAOYSA-N 0.000 claims description 2
- JIGUICYYOYEXFS-UHFFFAOYSA-N 3-tert-butylbenzene-1,2-diol Chemical compound CC(C)(C)C1=CC=CC(O)=C1O JIGUICYYOYEXFS-UHFFFAOYSA-N 0.000 claims description 2
- UXKQNCDDHDBAPD-UHFFFAOYSA-N 4-n,4-n-diphenylbenzene-1,4-diamine Chemical group C1=CC(N)=CC=C1N(C=1C=CC=CC=1)C1=CC=CC=C1 UXKQNCDDHDBAPD-UHFFFAOYSA-N 0.000 claims description 2
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical group OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 claims description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 claims description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical class CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 239000001913 cellulose Substances 0.000 claims description 2
- 229920002678 cellulose Polymers 0.000 claims description 2
- GVJHHUAWPYXKBD-UHFFFAOYSA-N d-alpha-tocopherol Natural products OC1=C(C)C(C)=C2OC(CCCC(C)CCCC(C)CCCC(C)C)(C)CCC2=C1C GVJHHUAWPYXKBD-UHFFFAOYSA-N 0.000 claims description 2
- 239000012933 diacyl peroxide Substances 0.000 claims description 2
- 229940035422 diphenylamine Drugs 0.000 claims description 2
- WNAHIZMDSQCWRP-UHFFFAOYSA-N dodecane-1-thiol Chemical group CCCCCCCCCCCCS WNAHIZMDSQCWRP-UHFFFAOYSA-N 0.000 claims description 2
- 150000002825 nitriles Chemical class 0.000 claims description 2
- NWVVVBRKAWDGAB-UHFFFAOYSA-N p-methoxyphenol Chemical compound COC1=CC=C(O)C=C1 NWVVVBRKAWDGAB-UHFFFAOYSA-N 0.000 claims description 2
- 125000005634 peroxydicarbonate group Chemical group 0.000 claims description 2
- 150000003467 sulfuric acid derivatives Chemical class 0.000 claims description 2
- 229960001295 tocopherol Drugs 0.000 claims description 2
- 229930003799 tocopherol Natural products 0.000 claims description 2
- 235000010384 tocopherol Nutrition 0.000 claims description 2
- 239000011732 tocopherol Substances 0.000 claims description 2
- 150000004670 unsaturated fatty acids Chemical class 0.000 claims description 2
- 235000021122 unsaturated fatty acids Nutrition 0.000 claims description 2
- GVJHHUAWPYXKBD-IEOSBIPESA-N α-tocopherol Chemical compound OC1=C(C)C(C)=C2O[C@@](CCC[C@H](C)CCC[C@H](C)CCCC(C)C)(C)CCC2=C1C GVJHHUAWPYXKBD-IEOSBIPESA-N 0.000 claims description 2
- HXIQYSLFEXIOAV-UHFFFAOYSA-N 2-tert-butyl-4-(5-tert-butyl-4-hydroxy-2-methylphenyl)sulfanyl-5-methylphenol Chemical compound CC1=CC(O)=C(C(C)(C)C)C=C1SC1=CC(C(C)(C)C)=C(O)C=C1C HXIQYSLFEXIOAV-UHFFFAOYSA-N 0.000 claims 1
- 150000001336 alkenes Chemical class 0.000 claims 1
- 229920001567 vinyl ester resin Polymers 0.000 claims 1
- 230000000052 comparative effect Effects 0.000 description 13
- 230000005484 gravity Effects 0.000 description 11
- 238000004040 coloring Methods 0.000 description 8
- 239000002245 particle Substances 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 5
- 238000001879 gelation Methods 0.000 description 5
- 239000003381 stabilizer Substances 0.000 description 5
- 239000003999 initiator Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 238000010557 suspension polymerization reaction Methods 0.000 description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 description 3
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 3
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 3
- LGJCFVYMIJLQJO-UHFFFAOYSA-N 1-dodecylperoxydodecane Chemical compound CCCCCCCCCCCCOOCCCCCCCCCCCC LGJCFVYMIJLQJO-UHFFFAOYSA-N 0.000 description 2
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 2
- 238000007334 copolymerization reaction Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- FJKIXWOMBXYWOQ-UHFFFAOYSA-N ethenoxyethane Chemical compound CCOC=C FJKIXWOMBXYWOQ-UHFFFAOYSA-N 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 2
- 239000011976 maleic acid Substances 0.000 description 2
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- ZKEUVTROUPQVTM-UHFFFAOYSA-N 1-pentylperoxypentane Chemical compound CCCCCOOCCCCC ZKEUVTROUPQVTM-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- IJRPCFYNFGSVTC-UHFFFAOYSA-N 2-[2-[2-[3-(3-tert-butyl-4-hydroxy-2-methylphenyl)propanoyloxy]ethoxy]ethoxy]ethyl 3-(3-tert-butyl-4-hydroxy-2-methylphenyl)propanoate Chemical compound C1=CC(O)=C(C(C)(C)C)C(C)=C1CCC(=O)OCCOCCOCCOC(=O)CCC1=CC=C(O)C(C(C)(C)C)=C1C IJRPCFYNFGSVTC-UHFFFAOYSA-N 0.000 description 1
- JHLGIWLLGRJIEN-UHFFFAOYSA-L 2-hydroxypropanoate;lead(2+) Chemical compound [Pb+2].CC(O)C([O-])=O.CC(O)C([O-])=O JHLGIWLLGRJIEN-UHFFFAOYSA-L 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- NSGQRLUGQNBHLD-UHFFFAOYSA-N butan-2-yl butan-2-yloxycarbonyloxy carbonate Chemical compound CCC(C)OC(=O)OOC(=O)OC(C)CC NSGQRLUGQNBHLD-UHFFFAOYSA-N 0.000 description 1
- 239000012986 chain transfer agent Substances 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- UIWXSTHGICQLQT-UHFFFAOYSA-N ethenyl propanoate Chemical compound CCC(=O)OC=C UIWXSTHGICQLQT-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- XJRBAMWJDBPFIM-UHFFFAOYSA-N methyl vinyl ether Chemical compound COC=C XJRBAMWJDBPFIM-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- BWJUFXUULUEGMA-UHFFFAOYSA-N propan-2-yl propan-2-yloxycarbonyloxy carbonate Chemical compound CC(C)OC(=O)OOC(=O)OC(C)C BWJUFXUULUEGMA-UHFFFAOYSA-N 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002455 scale inhibitor Substances 0.000 description 1
- 229960001407 sodium bicarbonate Drugs 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000001384 succinic acid Substances 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- OPQYOFWUFGEMRZ-UHFFFAOYSA-N tert-butyl 2,2-dimethylpropaneperoxoate Chemical compound CC(C)(C)OOC(=O)C(C)(C)C OPQYOFWUFGEMRZ-UHFFFAOYSA-N 0.000 description 1
- NMOALOSNPWTWRH-UHFFFAOYSA-N tert-butyl 7,7-dimethyloctaneperoxoate Chemical compound CC(C)(C)CCCCCC(=O)OOC(C)(C)C NMOALOSNPWTWRH-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- C08F14/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen
- C08F14/02—Monomers containing chlorine
- C08F14/04—Monomers containing two carbon atoms
- C08F14/06—Vinyl chloride
Definitions
- the present invention relates to a method of preparing a vinyl chloride polymer, and more precisely, a method of preparing a vinyl chloride polymer having excellent processability by raising the final polymerization temperature up to 5 ⁇ 20°C from the initial polymerization temperature.
- a vinyl chloride polymer has been widely used in various industrial fields including the production of pipe and construction materials owing to its excellent mechanical strength, weatherability and chemical resistance. However, its moldability is not very good and needs to be improved. In general, the moldability of a vinyl chloride polymer depends on the polymer particle characteristics. Therefore, in order to increase productivity, the bulk specific gravity, internal porosity, diameter and particle distribution of vinyl chloride polymer particles need to be controlled, along with the improvement of gelation characteristics, plasticizer absorptiveness and powder fluidity. In particular, the bulk specific gravity of the vinyl chloride polymer must increase to improve the productivity from extrusion molding, and the melting rate of gelation of the vinyl chloride polymer must be accelerated to improve the processability of extrusion molding.
- the vinyl monomer that is possibly copolymerized with the vinyl chloride monomer is exemplified by olefin compounds such as ethylene and propylene; vinyl alkyl esters such as vinyl acetate and vinyl propionate; unsaturated nitriles such as acrylonitrile; vinyl alkyl ethers such as vinyl methyl ether and vinyl ethyl ether; unsaturated fatty acids such as acrylic acid, methacrylic acid, itaconic acid and maleic acid; and anhydrides of such fatty acids, and one or more compounds selected from the above.
- olefin compounds such as ethylene and propylene
- vinyl alkyl esters such as vinyl acetate and vinyl propionate
- unsaturated nitriles such as acrylonitrile
- vinyl alkyl ethers such as vinyl methyl ether and vinyl ethyl ether
- unsaturated fatty acids such as acrylic acid, methacrylic acid, itaconic acid and maleic acid
- the preferable content of vinyl monomer for the copolymerization with vinyl chloride monomer is 1 ⁇ 99 weight part for 100 weight part of the vinyl chloride monomer.
- a protective colloid auxiliary can be added to ensure the vinyl chloride polymer production processes remain stable and to give regular particles, which might include a vinyl alcohol resin having 30 ⁇ 90 weight% hydration, 4% solution viscosity of 10 ⁇ 60 cps at room temperature, a hydropropyl cellulose having a hydropropyl group of 3 ⁇ 20 weight%, 2% solution viscosity of 10 ⁇ 20,000 cps at room temperature, or an unsaturated organic acid polymer.
- one or more compounds selected from a group consisting of acrylic acid polymer, methacrylic acid polymer, itaconic acid polymer, fumaric acid polymer, maleic acid polymer, succinic acid polymer, or gelatin can be used.
- the preferable content of the protective colloid auxiliary is 0.03 ⁇ 5 weight part for 100 weight part of the total monomer and 0.05 ⁇ 2.5 weight part is more preferred.
- the content of each compound is determined by considering the production process, productivity and quality of the final product, etc. But in general, the total initiator content is 0.02 ⁇ 0.2 weight part for 100 weight part of the total monomer and more preferably 0.04 - 0.12 weight part. If the initiator content is lower than the above range, the reaction time will be retarded and thus productivity will be decreased. On the contrary, if the initiator content is higher than the above range, the initiator will not be completely consumed during the polymerization and will remain in a final resin product, thus reducing the thermostability and qualities of the product including color expression.
- KH 2 PO 4 , NH 4 OH, KHC 4 H 4 O 6 , KHC 8 H 4 O 4 or Ca(OH) 2 , and these comp *ounds can be used singly or as a mixture of at least two.
- the shape of a stirring apparatus is not limited and any general stirring apparatus used for the conventional suspension polymerization of vinyl chloride monomer can be used.
- any general stirring apparatus used for the conventional suspension polymerization of vinyl chloride monomer can be used.
- paddle type, pitched paddle type, bloomers gin type, power feeder type, turbine type and propeller type can be used as a stirring blade or several stirring blades can be used together.
- baffle, board type, cylinder type, D type, loop type and finger type baffles can be used as a baffle.
- a protective colloid auxiliary To a reactor are added a protective colloid auxiliary, a polymerization initiator, a pH regulator and deionized water as a solvent, to which vinyl chloride monomer is added under vacuum conditions, followed by polymerization. At this time, the polymerization can be performed by suspension polymerization.
- First polymerization is performed at 30 ⁇ 80°C until the polymerization conversion rate reaches 60%.
- the temperature of the reactor is raised up to 5 ⁇ 20°C from the first polymerization temperature and then an antioxidant is added, followed by second polymerization at a constant temperature. If the temperature is raised before the conversion rate reaches 60%, the molecular weight distribution will become wider and thus gelation will be interrupted in an extruder, resulting in the decrease of processability.
- the degree of polymerization of a vinyl chloride polymer is determined by the polymerization temperature. Therefore, if the polymerization temperature is high, a resultant resin will have a low degree of polymerization. On the other hand, if the polymerization temperature is low, a resin with a high degree of polymerization will be prepared.
- the polymerization temperature of the present invention gives a degree of polymerization of 700 ⁇ 1300.
- the polymerization temperature is not constant from first polymerization to second polymerization.
- highly polymerized region content is regulated, resulting in a vinyl chloride polymer having excellent processability and a large apparent specific gravity.
- the slurry obtained from the polymerization is dried with a fluidized-bed dryer to give a final vinyl chloride polymer.
- 30 ⁇ 40% is preferably 10 - 30 weight part for 100 weight part of the vinyl chloride monomer added before polymerization starts, and the content of vinyl chloride monomer added when the polymerization conversion rate is 60 ⁇ 70% is preferably 10 ⁇ 30 weight part.
- an additive such as a polymerization regulator, a chain transfer agent, a pH regulator, a cross-linking agent, an antistatic agent, a scale inhibitor, and a surfactant can be added separately or continuously to the polymerization system before or after polymerization, or during the polymerization.
- the reaction temperature was raised to 64°C, and 60 g of Methylene glycol-bis-[3-(3-t-butyl-methyl-4-hydroxy phenyl)propionate] was added, followed by reaction.
- the obtained slurry was dried with a fluidized-bed dryer to give a vinyl chloride polymer.
- the roll sheet prepared to measure the primary coloring characteristics was cut into 250 mm x 20 mm and put in a 190°C master oven. The sheet proceeded by 3mm/min and the time consumed until the color changed to black was measured; this time was set up as a standard for the evaluation of thermostability.
- Example 7 The polymers of Example 7 ⁇ Example 15, in which vinyl chloride monomers were additionally added in portions after a certain period of time, exhibited excellent polymerization production per unit time, compared with the polymers of Comparative Examples 1 - 6.
- a vinyl chloride polymer having a high bulk specific gravity and excellent processability along with excellent primary coloring properties and high qualities can be prepared, and further, polymerization productivity can be increased by the addition of additional vinyl chloride monomers separately.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200780031162XA CN101506249B (en) | 2006-08-22 | 2007-02-05 | Method of preparing vinyl chloride polymer having superior processability |
US12/310,425 US9428601B2 (en) | 2006-08-22 | 2007-02-05 | Method of preparing vinyl chloride polymers having superior processability |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR20060079392 | 2006-08-22 | ||
KR10-2006-0079392 | 2006-08-22 | ||
KR10-2007-0003430 | 2007-01-11 | ||
KR1020070003430A KR100983702B1 (en) | 2006-08-22 | 2007-01-11 | Methods of preparing a vinyl chloride polymer having superior workability |
Publications (1)
Publication Number | Publication Date |
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WO2008023870A1 true WO2008023870A1 (en) | 2008-02-28 |
Family
ID=39106937
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/KR2007/000599 WO2008023870A1 (en) | 2006-08-22 | 2007-02-05 | Method of preparing vinyl chloride polymer having superior processability |
Country Status (1)
Country | Link |
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WO (1) | WO2008023870A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4381361A (en) * | 1980-11-03 | 1983-04-26 | Bayer Aktiengesellschaft | Polyvinyl chloride moulding composition |
US5502123A (en) * | 1993-12-21 | 1996-03-26 | Shin-Etsu Chemical Co., Ltd. | Process for preparing vinyl chloride polymer |
JPH10265511A (en) * | 1997-03-21 | 1998-10-06 | Shindaiichi Enbi Kk | Production of vinyl chloride-based polymer |
WO2000031156A1 (en) * | 1998-11-20 | 2000-06-02 | Lg Chemical Ltd. | Method of preparing vinyl chloride resin having high impact strength and low die swell |
-
2007
- 2007-02-05 WO PCT/KR2007/000599 patent/WO2008023870A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4381361A (en) * | 1980-11-03 | 1983-04-26 | Bayer Aktiengesellschaft | Polyvinyl chloride moulding composition |
US5502123A (en) * | 1993-12-21 | 1996-03-26 | Shin-Etsu Chemical Co., Ltd. | Process for preparing vinyl chloride polymer |
JPH10265511A (en) * | 1997-03-21 | 1998-10-06 | Shindaiichi Enbi Kk | Production of vinyl chloride-based polymer |
WO2000031156A1 (en) * | 1998-11-20 | 2000-06-02 | Lg Chemical Ltd. | Method of preparing vinyl chloride resin having high impact strength and low die swell |
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