WO2023277530A1 - 염화비닐계 중합체의 제조방법 및 이에 따라 제조된 염화비닐계 중합체 - Google Patents
염화비닐계 중합체의 제조방법 및 이에 따라 제조된 염화비닐계 중합체 Download PDFInfo
- Publication number
- WO2023277530A1 WO2023277530A1 PCT/KR2022/009235 KR2022009235W WO2023277530A1 WO 2023277530 A1 WO2023277530 A1 WO 2023277530A1 KR 2022009235 W KR2022009235 W KR 2022009235W WO 2023277530 A1 WO2023277530 A1 WO 2023277530A1
- Authority
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- WIPO (PCT)
- Prior art keywords
- vinyl chloride
- based polymer
- weight
- monomer
- polyvinyl alcohol
- Prior art date
Links
- 229920000915 polyvinyl chloride Polymers 0.000 title claims abstract description 113
- 238000000034 method Methods 0.000 title abstract description 22
- 239000000178 monomer Substances 0.000 claims abstract description 60
- 239000002270 dispersing agent Substances 0.000 claims abstract description 57
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 55
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 55
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims abstract description 50
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 38
- 150000003839 salts Chemical class 0.000 claims abstract description 31
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims abstract description 30
- 229910052751 metal Inorganic materials 0.000 claims abstract description 30
- 239000002184 metal Substances 0.000 claims abstract description 30
- 230000000379 polymerizing effect Effects 0.000 claims abstract description 6
- 238000006703 hydration reaction Methods 0.000 claims description 46
- 230000036571 hydration Effects 0.000 claims description 44
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 28
- 238000004519 manufacturing process Methods 0.000 claims description 20
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 14
- 239000002344 surface layer Substances 0.000 claims description 13
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 9
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 9
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 9
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 9
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 238000004458 analytical method Methods 0.000 claims description 7
- 229920002678 cellulose Polymers 0.000 claims description 7
- 239000001913 cellulose Substances 0.000 claims description 7
- 239000004014 plasticizer Substances 0.000 claims description 7
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 6
- 239000012798 spherical particle Substances 0.000 claims description 4
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims description 3
- 229920001479 Hydroxyethyl methyl cellulose Polymers 0.000 claims description 3
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims description 3
- 229920000609 methyl cellulose Polymers 0.000 claims description 3
- 239000001923 methylcellulose Substances 0.000 claims description 3
- 235000010981 methylcellulose Nutrition 0.000 claims description 3
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 3
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 3
- 238000002844 melting Methods 0.000 abstract description 18
- 230000008018 melting Effects 0.000 abstract description 18
- 238000002156 mixing Methods 0.000 abstract description 4
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 52
- 229920000642 polymer Polymers 0.000 description 30
- 229920005989 resin Polymers 0.000 description 23
- 239000011347 resin Substances 0.000 description 23
- 239000002245 particle Substances 0.000 description 17
- 239000002002 slurry Substances 0.000 description 14
- 229920002689 polyvinyl acetate Polymers 0.000 description 13
- 239000012467 final product Substances 0.000 description 10
- 239000010410 layer Substances 0.000 description 9
- 239000000047 product Substances 0.000 description 8
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 8
- 238000005259 measurement Methods 0.000 description 7
- 239000003505 polymerization initiator Substances 0.000 description 7
- 229920002554 vinyl polymer Polymers 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000012662 bulk polymerization Methods 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- -1 olefin compounds Chemical class 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000010557 suspension polymerization reaction Methods 0.000 description 3
- 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 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical group CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- FJKIXWOMBXYWOQ-UHFFFAOYSA-N ethenoxyethane Chemical compound CCOC=C FJKIXWOMBXYWOQ-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- LGJCFVYMIJLQJO-UHFFFAOYSA-N 1-dodecylperoxydodecane Chemical compound CCCCCCCCCCCCOOCCCCCCCCCCCC LGJCFVYMIJLQJO-UHFFFAOYSA-N 0.000 description 1
- ZKEUVTROUPQVTM-UHFFFAOYSA-N 1-pentylperoxypentane Chemical compound CCCCCOOCCCCC ZKEUVTROUPQVTM-UHFFFAOYSA-N 0.000 description 1
- CRJIYMRJTJWVLU-UHFFFAOYSA-N 2,4,4-trimethylpentan-2-yl 3-(5,5-dimethylhexyl)dioxirane-3-carboxylate Chemical compound CC(C)(C)CCCCC1(C(=O)OC(C)(C)CC(C)(C)C)OO1 CRJIYMRJTJWVLU-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
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-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
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 239000004709 Chlorinated polyethylene Substances 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
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 125000003158 alcohol group Chemical group 0.000 description 1
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium peroxydisulfate Substances [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 1
- VAZSKTXWXKYQJF-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)OOS([O-])=O VAZSKTXWXKYQJF-UHFFFAOYSA-N 0.000 description 1
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 239000002585 base 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
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- UIWXSTHGICQLQT-UHFFFAOYSA-N ethenyl propanoate Chemical compound CCC(=O)OC=C UIWXSTHGICQLQT-UHFFFAOYSA-N 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
- 239000006260 foam Substances 0.000 description 1
- 238000003988 headspace gas chromatography Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- XJRBAMWJDBPFIM-UHFFFAOYSA-N methyl vinyl ether Chemical compound COC=C XJRBAMWJDBPFIM-UHFFFAOYSA-N 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
- 150000002825 nitriles Chemical class 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 239000003002 pH adjusting agent Substances 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 125000005634 peroxydicarbonate group Chemical class 0.000 description 1
- 239000011118 polyvinyl acetate Substances 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
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 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
- 230000001681 protective effect Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000002455 scale inhibitor Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000010558 suspension polymerization method Methods 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
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
- 229920001567 vinyl ester resin Polymers 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
-
- 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
- C08F2/20—Aqueous medium with the aid of macromolecular dispersing 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
- C08F2/44—Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or 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; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or 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; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
-
- 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
- C08F2500/00—Characteristics or properties of obtained polyolefins; Use thereof
- C08F2500/18—Bulk density
-
- 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
- C08F2500/00—Characteristics or properties of obtained polyolefins; Use thereof
- C08F2500/24—Polymer with special particle form or size
-
- 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
-
- 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
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Definitions
- the present invention is a method for producing a vinyl chloride-based polymer capable of maintaining a high melting rate, a low remaining unreacted monomer content, and a high bulk density of the polymer by using a mixed dispersant including a high degree of hydration dispersant and a carbonate metal salt in a certain amount And it relates to a vinyl chloride-based polymer prepared according to the above production method.
- PVC is a typical thermoplastic resin, and is used in various product fields such as films, sheets, and molded products because of its low price, easy hardness control, and excellent physicochemical properties such as mechanical strength, weather resistance, and chemical resistance.
- CPA Cold Plasticizer Absorption, plasticizer absorption rate
- the higher the CPA the faster the melting rate described above tends to be.
- the CPA is in a trade-off relationship with the bulk density of the vinyl chloride-based polymer, and the higher the bulk density of the vinyl chloride-based polymer, the higher the extrusion amount during extrusion processing, resulting in excellent productivity. That is, in order to manufacture a PVC resin having excellent mechanical strength, as the CPA of the PVC resin increases, the bulk density decreases, resulting in a decrease in productivity during processing. Therefore, in order to realize an appropriate level of productivity and mechanical strength, research on a method for preparing a PVC resin with a balance between CPA and bulk density is required.
- Patent Document 1 KR 10-2021-0034418 A
- Patent Document 2 KR 10-2017-0124959 A
- the present invention provides a method for preparing a vinyl chloride polymer capable of reducing the content of unreacted monomers remaining in the final product while maintaining an excellent balance between CPA and bulk density of the vinyl chloride polymer, and a vinyl chloride polymer manufactured by the method. It is to provide a polymer.
- the present invention provides a method for preparing a vinyl chloride-based polymer and a vinyl chloride-based polymer.
- the present invention includes the steps of introducing a mixed dispersant and a carbonate metal salt into a polymerization reactor (S1) and polymerizing a vinyl chloride-based monomer in the presence of the mixed dispersant and a carbonate metal salt (S2), wherein the mixed dispersant It provides a method for preparing a vinyl chloride-based polymer comprising high degree of hydration polyvinyl alcohol having a degree of hydration of 80 mol% or more, and the content of polyvinyl alcohol having a high degree of hydration in the mixed dispersant is 50 to 60% by weight.
- the present invention provides a method for producing a vinyl chloride-based polymer according to (1) above, wherein the mixed dispersant and the carbonate metal salt are mixed in advance and then introduced into a polymerization reactor.
- the mixed dispersant further comprises polyvinyl alcohol with a low hydration degree of less than 80 mol% and a cellulose-based dispersant Preparation of a vinyl chloride-based polymer provides a way
- cellulose-based dispersing agent is a vinyl chloride-based polymer selected from the group consisting of methyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose.
- the cellulose-based dispersing agent is a vinyl chloride-based polymer selected from the group consisting of methyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose.
- the present invention according to any one of (1) to (4) above, wherein the carbonate metal salt is composed of sodium carbonate (Na 2 CO 3 ), potassium carbonate (K 2 CO 3 ) and sodium hydrogen carbonate (NaHCO 3 ) It provides a method for producing one or more vinyl chloride-based polymers selected from the group.
- the present invention provides a method for producing a vinyl chloride polymer according to any one of (1) to (5) above, wherein the mixed dispersant is used in an amount of 0.05 to 0.15 parts by weight based on 100 parts by weight of the vinyl chloride monomer. do.
- the present invention in any one of (1) to (6), wherein the carbonate metal salt is used in an amount of 0.01 to 0.03 parts by weight based on 100 parts by weight of the vinyl chloride monomer Provides a method for producing a vinyl chloride polymer do.
- the present invention provides a method for producing a vinyl chloride-based polymer according to (1) to (7) above, wherein the polymerization is performed at 50 to 65°C.
- the present invention provides a vinyl chloride-based polymer in which the content of the vinyl chloride-based polymer in the surface layer measured by XPS analysis is 50% or more.
- the present invention provides the vinyl chloride-based polymer according to (9) above, characterized in that the cold plasticizer absorption (CPA) is 18% or more.
- the present invention provides the vinyl chloride polymer according to (9) or (10) above, characterized in that it has a bulk density of 0.580 g/cm 3 or more.
- the present invention provides the vinyl chloride-based polymer according to any one of (9) to (11) above, which is in the form of spherical particles.
- the vinyl chloride-based polymer prepared using the production method of the present invention exhibits high CPA and bulk density at the same time, so it has excellent productivity during extrusion processing and mechanical strength when manufactured as a final product, and has a low content of unreacted monomers. no harmful
- vinyl chloride-based polymer refers to a compound produced by polymerizing a vinyl chloride-based monomer, that is, a vinyl chloride monomer alone or a mixture of a vinyl chloride monomer and a vinyl chloride monomer copolymerizable with a vinyl-based monomer. It may mean a polymer chain derived from a vinyl chloride-based monomer as a comprehensive representation of .
- the present invention includes the steps of introducing a mixed dispersant and a carbonate metal salt into a polymerization reactor (S1) and polymerizing a vinyl chloride-based monomer in the presence of the mixed dispersant and a carbonate metal salt (S2), wherein the mixed dispersant has a degree of hydration
- S1 polymerization reactor
- S2 carbonate metal salt
- the mixed dispersant has a degree of hydration
- the inventors of the present invention pre-mixed a mixed dispersant containing high degree of hydration polyvinyl alcohol and a carbonate metal salt, and then, when polymerizing a vinyl chloride-based monomer in the presence of the mixture, the inventors of the present invention obtained chloride without loss of bulk density. It was found that the amount of unreacted monomers remaining in the final polymer could be reduced while increasing the CPA of the vinyl-based polymer, thereby completing the method for preparing a vinyl chloride-based polymer of the present invention.
- the manufacturing method of the present invention includes a step (S1) of introducing a mixed dispersant and a carbonate metal salt into a polymerization reactor prior to performing the polymerization reaction.
- the mixed dispersing agent used in this step serves to disperse the vinyl chloride-based monomer introduced in the step to be described later into a solvent, and may be a mixture of two or more different dispersing agents.
- At least one of the above dispersants may be polyvinyl alcohol having a high degree of hydration having a degree of hydration of 80 mol% or more.
- the degree of hydration of the polyvinyl alcohol may be 85 mol% or more.
- polyvinyl alcohol used as a dispersant in this step is a form in which polyvinyl acetate is hydrated and some of the acetate is substituted with alcohol, and the degree of hydration is defined as the degree to which alcohol is substituted in the acetate.
- the content of polyvinyl alcohol having a high degree of polymerization may be 50 to 60% by weight. If the content of polyvinyl alcohol with a high degree of hydration in the mixed dispersant is too small, the stability of the particles deteriorates during the polymerization process, resulting in a large amount of scale, the vinyl chloride-based polymer particles may not be obtained in a constant shape, and furthermore, the finally produced chloride The bulk density of the vinyl-based polymer is too low, and a problem in that the amount of extrusion may be reduced may occur.
- the content of polyvinyl alcohol in the mixed dispersant is too high, the voids inside the resulting vinyl chloride-based polymer particles may be reduced and the plasticizer absorption rate may be low. The content of unreacted monomer remaining in the product may increase rapidly.
- the mixed dispersant may further include polyvinyl alcohol having a low hydration degree of less than 80 mol% and a cellulose-based dispersant in addition to the polyvinyl alcohol having a high degree of hydration described above.
- polyvinyl alcohol having a low hydration degree of less than 80 mol% and a cellulose-based dispersant in addition to the polyvinyl alcohol having a high degree of hydration described above.
- high-hydration polyvinyl alcohol and low-hydration polyvinyl alcohol are used together, basic physical properties such as polymer particle size and plasticizer absorption rate can be easily controlled, and the thickness of the skin layer is too thick while satisfying the basic physical properties required for the product. It is possible to obtain polymer particles that are not thick and have relatively fast meltability.
- the degree of hydration of the low degree of hydration polyvinyl alcohol may be less than 80 mol%, preferably 50 to 75 mol%, and the low degree of hydration polyvinyl alcohol is at least two types of polyvinyl alcohol having a degree of hydration within the above-described range. It may contain.
- the mixed dispersant may be used in an amount of 0.05 to 0.15 parts by weight, preferably 0.08 to 0.12 parts by weight, based on 100 parts by weight of the vinyl chloride monomer. If the amount of the mixed dispersant used is too small, the role of the mixed dispersant described above cannot be sufficiently performed, and polymerization stability may be lowered. If the amount of the mixed dispersant used is too large, the dispersant component remains and becomes an impurity in the final product. action, and product quality may be adversely affected.
- the cellulose-based dispersant may serve as a protective colloidal aid for stabilizing reactants during polymerization.
- the cellulose-based dispersing agent at least one selected from the group consisting of methyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose may be used.
- the carbonate-based metal salt used in this step serves as a pH adjuster and can reduce the content of unreacted monomers that may remain in the final product.
- the carbonate-based metal salt one that can be dissolved in water and ionized may be used, and specifically, in the group consisting of sodium carbonate (Na 2 CO 3 ), potassium carbonate (K 2 CO 3 ) and sodium hydrogen carbonate (NaHCO 3 ) One or more selected ones can be used.
- the carbonate metal salt may be used in an amount of 0.01 to 0.03 parts by weight, preferably 0.015 to 0.025 parts by weight, based on 100 parts by weight of the vinyl chloride monomer. If the amount of the carbonate metal salt is too small, the role of the carbonate metal salt described above cannot be sufficiently performed, and if the amount of the carbonate metal salt is too large, the carbonate metal salt component affects the dispersant to deteriorate dispersion stability, and thus The size of the polymer particles may be excessively large.
- the mixed dispersant and the carbonate metal salt may be pre-mixed and then introduced into the polymerization reactor.
- the content of the vinyl chloride-based polymer in the surface layer of the final product can be further increased by mixing and adding the mixed dispersant and the carbonate metal salt in advance before the polymerization reaction starts, rather than after the polymerization reaction starts, thereby increasing the melting rate. there is.
- the polymerization reaction may be performed by introducing the vinyl chloride-based monomer.
- the polymerization reaction in this step may be carried out through a suspension polymerization method.
- the vinyl chloride-based monomer may be one type of vinyl chloride monomer or a mixed monomer including a vinyl chloride monomer and a vinyl-based monomer copolymerizable with the vinyl chloride monomer.
- the mixed monomer may include 1 to 50 parts by weight of a copolymerizable vinyl monomer based on 100 parts by weight of the vinyl chloride monomer.
- the vinyl-based monomer may be selected from olefin compounds such as ethylene and propylene; vinyl esters such as vinyl acetate and vinyl propionate; unsaturated nitriles such as acrylonitrile; vinylalkyl ethers such as vinylmethyl ether and vinylethyl ether; unsaturated fatty acids such as acrylic acid, methacrylic acid, itaconic acid, and maleic acid; And it may be at least one selected from the group consisting of anhydrides of these fatty acids.
- a solvent for suspension polymerization may be used, and the solvent may be deionized water.
- the amount of the solvent may be appropriately adjusted according to the size of the polymerization reactor and the amount of the monomer used, and for example, 70 parts by weight or more based on 100 parts by weight of the vinyl chloride monomer.
- the solvent may be mixed and introduced with the mixed dispersant and the carbonate metal salt in the previous step S1.
- a polymerization initiator for initiating a polymerization reaction may be used.
- the polymerization initiator may be used in an amount of 0.02 to 0.2 parts by weight based on 100 parts by weight of the vinyl chloride monomer to be polymerized. If the polymerization initiator is used in an amount of less than 0.02 parts by weight, the polymerization reaction time is prolonged and the conversion rate to a vinyl chloride-based polymer is lowered, resulting in a decrease in productivity. There is a concern that the polymerization initiator is not completely consumed and remains in the finally prepared vinyl chloride polymer slurry to deteriorate thermal stability. More specifically, the polymerization initiator may be used in an amount of 0.04 to 0.12 parts by weight based on 100 parts by weight of the vinyl chloride monomer.
- peroxide-based compounds such as dicumyl peroxide, dipentyl peroxide, di-3,5,5-trimethyl hexanoyl peroxide or dilauryl peroxide; peroxydicarbonate compounds such as diisopropylperoxydicarbonate, di-sec-butylperoxydicarbonate or di-2-ethylhexylperoxydicarbonate; peroxy ester compounds such as t-butyl peroxy pivalate, 1,1,3,3-tetramethyl butyl peroxy neodecanoate or t-butyl peroxy neodecanoate; azo compounds such as azobis-2,4-dimethylvaleronitrile; hydroperoxide-based compounds such as t-butyl hydroperoxide; or sulfate-based compounds such as potassium persulfate or ammonium persulfate, and any one or a mixture of two or more
- the polymerization may be carried out at a temperature range of 50 to 65 °C, more specifically 50 to 60 °C.
- a heat removal process may be performed through a reactor jacket and a reflux condenser (R/CN) to minimize temperature change during the polymerization process.
- R/CN reflux condenser
- the polymerization reaction is performed at a temperature within the above range, repolymerization and scale formation may be inhibited while preventing foam generation.
- decomposition of the polymerization initiator remaining at the end of the reaction is induced in the above temperature range, and a vinyl chloride-based polymer having better physical properties after the reaction can be prepared.
- additives such as antioxidants, bases, crosslinking agents, polymerization regulators, chain transfer agents, antistatic agents, scale inhibitors, surfactants, and the like may be additionally added, and the types and contents of the additives are not particularly limited. It can be used in known conventional types and contents.
- the additives may be added at any point during the polymerization process, and may be added in batches or continuously.
- the present invention provides a vinyl chloride-based polymer that can be prepared using the method for preparing the vinyl chloride-based polymer described above. Specifically, the present invention provides a vinyl chloride-based polymer in which the content of the vinyl chloride-based polymer in the surface layer measured by XPS analysis is 50% or more.
- the final product is obtained in a form in which the vinyl chloride-based polymer exists inside and a dispersant surrounds the surface.
- the band forming the surface is called a skin layer, and typically, the thicker the skin layer, the slower the melting rate, and the melting time tends to increase.
- the thickness of the skin layer can be inferred from the content of the vinyl chloride-based polymer in the surface obtained by XPS analysis of the surface of the obtained polymer particle, and specifically, the lower the content of the vinyl chloride-based polymer in the surface, the thinner the skin layer.
- the content of the dispersant on the surface of the polymer particle is reduced and the content of the vinyl chloride polymer is increased, thereby obtaining a vinyl chloride polymer having a thin skin layer.
- a vinyl chloride-based polymer having a content of 50% or more of the vinyl chloride-based polymer in the surface layer can be obtained.
- the vinyl chloride-based polymer of the present invention may have a high melting rate as it has a thin skin layer thickness.
- the content of the vinyl chloride-based polymer in the surface layer may be measured by the following method using XPS analysis.
- PVC content (PVC/(PVC+PVA+PVAc)) * 100% based on the total amount of PVC, PVA and PVAc content calculated through the above process is defined as the content of the vinyl chloride polymer.
- K-ALPHA+ manufactured by Thermofisher
- the vinyl chloride-based polymer of the present invention may have a cold plasticizer absorption (CPA) of 18% or more.
- CPA cold plasticizer absorption
- the vinyl chloride-based polymer of the present invention has a thin skin layer thickness, so that the melting rate is fast and the CPA may be as high as 18% or more.
- the vinyl chloride-based polymer of the present invention may have a bulk density of 0.580 g/cm 3 or more. Although the bulk density is in a trade-off relationship with CPA, the vinyl chloride-based polymer particles of the present invention have a shape relatively more spherical than that of the vinyl chloride-based polymer prepared by the conventional method, and thus exhibit a high CPA. can indicate bulk density.
- the vinyl chloride-based polymer of the present invention may be in the form of spherical particles, and in particular, may be in the form of spherical particles having an aspect ratio of 1 to 1.2.
- a resin slurry was obtained in the same manner as in Example 1, except that sodium carbonate was not added.
- Example 1 without adding sodium carbonate, 0.045 parts by weight of polyvinyl alcohol having a degree of hydration of 88 mol%, 0.037 part by weight of polyvinyl alcohol having a degree of hydration of 72 mol%, and polyvinyl alcohol having a degree of hydration of 55 mol% A resin slurry was obtained in the same manner except that 0.008 parts by weight of alcohol and 0.010 part by weight of hydroxypropyl methyl cellulose were added.
- a resin slurry was obtained in the same manner as in Example 1, except that the addition of sodium carbonate was made after the introduction of the monomer.
- a resin slurry was obtained in the same manner as in Example 2, except that the addition of sodium carbonate was made after the addition of the monomer.
- a resin slurry was obtained in the same manner as in Example 3, except that sodium carbonate was added, except that the time of addition was after the addition of the monomer.
- Example 1 0.045 parts by weight of polyvinyl alcohol having a hydration degree of 88 mol%, 0.037 parts by weight of polyvinyl alcohol having a hydration degree of 72 mol%, 0.008 parts by weight of polyvinyl alcohol having a hydration degree of 55 mol%, A resin slurry was obtained in the same manner except that 0.010 parts by weight of hydroxypropyl methyl cellulose was added.
- Example 1 0.065 parts by weight of polyvinyl alcohol having a hydration degree of 88 mol%, 0.020 parts by weight of polyvinyl alcohol having a hydration degree of 72 mol%, 0.008 parts by weight of polyvinyl alcohol having a hydration degree of 55 mol%, A resin slurry was obtained in the same manner except that 0.007 parts by weight of hydroxypropyl methyl cellulose was added.
- Table 1 summarizes the content of polyvinyl alcohol of high degree of hydration and the input time of sodium carbonate in the mixed dispersant used in Examples and Comparative Examples.
- the resin slurries prepared in Examples and Comparative Examples were dehydrated and dried to obtain a vinyl chloride-based polymer in the form of particles.
- CPA and bulk density were measured for the obtained vinyl chloride polymer.
- CPA was measured according to ASTM D 3367-95 and bulk density was measured according to ASTM D 1895 Method A, and the results are shown in Table 2 below.
- Example 1 18.7 0.581
- Example 2 19.0 0.580
- Example 3 18.2 0.588 Comparative Example 1 15.1 0.584 Comparative Example 2 17.3 0.567 Comparative Example 3 16.0 0.575 Comparative Example 4 17.0 0.571 Comparative Example 5 15.9 0.578 Comparative Example 6 17.5 0.564 Comparative Example 7 14.4 0.613
- the vinyl chloride-based polymer of the present invention had the highest CPA among Examples and Comparative Examples, and also maintained its bulk density. This means that the vinyl chloride-based polymer of the present invention will exhibit excellent mechanical properties and high melting rate.
- the content of high degree of hydration polyvinyl alcohol in the mixed dispersant is 50 to 60% by weight, and the carbonate metal salt is added in advance before adding the monomer, thereby producing a vinyl chloride-based polymer having a high CPA and a good bulk density. confirmed that there is
- the resin slurries obtained in Examples and Comparative Examples were dehydrated and dried to obtain vinyl chloride-based polymers in the form of particles, and the content of the vinyl chloride-based polymers in the surface layer of the particles was measured. The content was calculated on the premise of the following conditions.
- the content of the vinyl chloride-based polymer in the surface layer was calculated by the following method using XPS analysis.
- K-ALPHA + manufactured by Thermofisher
- PVC content (PVC/(PVC+PVA+PVAc)) * 100% based on the total amount of PVC, PVA and PVAc content calculated through the above process is defined as the content of the vinyl chloride polymer.
- the content of the vinyl chloride-based polymer in the surface layer was higher than that of the comparative example, which means that the vinyl chloride-based polymer according to the examples of the present invention has the thinnest skin layer thickness and can be easily melted. do.
- the residual vinyl chloride monomer component was found to be significantly low in the vinyl chloride polymer prepared in the examples of the present invention, which means that the vinyl chloride polymer of the present invention has a melting rate and mechanical properties. This means that it is not only excellent in terms of toxicity, but also shows an advantage over the vinyl chloride-based polymer prepared by the conventional method in terms of harmfulness.
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Abstract
Description
탄산나트륨 투입 시점 | 혼합 분산제 내 고수화도 폴리비닐알코올 함량(중량%) | |
실시예 1 | 단량체 투입 전 | 55 |
실시예 2 | 단량체 투입 전 | 50 |
실시예 3 | 단량체 투입 전 | 60 |
비교예 1 | 미투입 | 55 |
비교예 2 | 미투입 | 45 |
비교예 3 | 단량체 투입 후 | 55 |
비교예 4 | 단량체 투입 후 | 50 |
비교예 5 | 단량체 투입 후 | 60 |
비교예 6 | 단량체 투입 전 | 45 |
비교예 7 | 단량체 투입 전 | 65 |
CPA(중량 %) | 벌크 밀도(g/cm3) | |
실시예 1 | 18.7 | 0.581 |
실시예 2 | 19.0 | 0.580 |
실시예 3 | 18.2 | 0.588 |
비교예 1 | 15.1 | 0.584 |
비교예 2 | 17.3 | 0.567 |
비교예 3 | 16.0 | 0.575 |
비교예 4 | 17.0 | 0.571 |
비교예 5 | 15.9 | 0.578 |
비교예 6 | 17.5 | 0.564 |
비교예 7 | 14.4 | 0.613 |
용융 시간(초) | |
실시예 1 | 43 |
실시예 2 | 42 |
실시예 3 | 46 |
비교예 1 | 54 |
비교예 2 | 48 |
비교예 3 | 50 |
비교예 4 | 49 |
비교예 5 | 53 |
비교예 6 | 47 |
비교예 7 | 57 |
표면층 내 염화비닐계 중합체 함량(%) | |
실시예 1 | 50.7 |
실시예 2 | 52.1 |
실시예 3 | 50.2 |
비교예 1 | 40.2 |
비교예 2 | 45.5 |
비교예 3 | 43.9 |
비교예 4 | 46.1 |
비교예 5 | 43.5 |
비교예 6 | 46.1 |
비교예 7 | 38.2 |
잔류 염화비닐계 단량체 | |
실시예 1 | 0.13 |
실시예 2 | 0.09 |
실시예 3 | 0.22 |
비교예 1 | 0.84 |
비교예 2 | 0.65 |
비교예 3 | 0.70 |
비교예 4 | 0.64 |
비교예 5 | 0.77 |
비교예 6 | 0.51 |
비교예 7 | 0.86 |
Claims (12)
- 혼합 분산제 및 카보네이트 금속염을 중합 반응기에 투입하는 단계(S1);상기 혼합 분산제 및 카보네이트 금속염의 존재 하에서 염화비닐계 단량체를 중합하는 단계(S2); 를 포함하고,상기 혼합 분산제는 수화도가 80 몰% 이상인 고수화도 폴리비닐알코올을 포함하며,상기 혼합 분산제 내 고수화도 폴리비닐알코올의 함량은 50 내지 60 중량%인 것인 염화비닐계 중합체의 제조방법.
- 제1항에 있어서,상기 혼합 분산제 및 카보네이트 금속염은 미리 혼합되어 중합 반응기에 투입되는 것인 염화비닐계 중합체의 제조방법.
- 제1항에 있어서,상기 혼합 분산제는 수화도가 80 몰% 미만인 저수화도 폴리비닐알코올 및 셀룰로오스계 분산제를 더 포함하는 것인 염화비닐계 중합체의 제조방법.
- 제3항에 있어서,상기 셀룰로오스계 분산제는 메틸셀룰로오스, 히드록시에틸셀룰로오스 및 히드록시프로필메틸셀룰로오스로 이루어진 군에서 선택되는 1 이상인 염화비닐계 중합체의 제조방법.
- 제1항에 있어서,상기 카보네이트 금속염은 탄산나트륨(Na2CO3), 탄산칼륨(K2CO3) 및 탄산수소나트륨(NaHCO3)로 이루어진 군에서 선택되는 1 이상인 염화비닐계 중합체의 제조방법.
- 제1항에 있어서,상기 혼합 분산제는 염화비닐계 단량체 100 중량부 대비 0.05 내지 0.15 중량부로 사용되는 것인 염화비닐계 중합체의 제조방법.
- 제1항에 있어서,상기 카보네이트 금속염은 염화비닐계 단량체 100 중량부 대비 0.01 내지 0.03 중량부로 사용되는 것인 염화비닐계 중합체의 제조방법.
- 제1항에 있어서,상기 중합은 50 내지 65℃에서 수행되는 것인 염화비닐계 중합체의 제조방법.
- XPS 분석에 의하여 측정된 표면층 내 염화비닐계 중합체의 함량이 50% 이상인 것인 염화비닐계 중합체.
- 제9항에 있어서,CPA(Cold plasticizer absorption)가 18% 이상인 것을 특징으로 하는 염화비닐계 중합체.
- 제9항에 있어서,벌크 밀도가 0.580g/cm3 이상인 것을 특징으로 하는 염화비닐계 중합체.
- 제9항에 있어서,구형의 입자 형태인 염화비닐계 중합체.
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