WO2005063823A1 - 塩化ビニル系重合体の製造方法 - Google Patents
塩化ビニル系重合体の製造方法 Download PDFInfo
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- WO2005063823A1 WO2005063823A1 PCT/JP2004/019103 JP2004019103W WO2005063823A1 WO 2005063823 A1 WO2005063823 A1 WO 2005063823A1 JP 2004019103 W JP2004019103 W JP 2004019103W WO 2005063823 A1 WO2005063823 A1 WO 2005063823A1
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- polymerization
- initiator
- butyl
- highly active
- vinyl chloride
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- 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 process for producing a vinyl chloride-based polymer, and more particularly, to a vinyl chloride-based polymer capable of stably obtaining a high-quality polymer with few fish eyes at high productivity by suspension polymerization. And a method for producing the same.
- suspension polymerization of a mixture of a vinyl chloride monomer or a vinyl chloride monomer and a monomer copolymerizable therewith is performed, for example, as follows.
- An aqueous medium, a dispersant (suspension agent) and a polymerization initiator are charged into a polymerization vessel equipped with a reflux condenser, a jacket, a baffle having a cooling capacity, a coil, and other additives as required.
- the inside of the polymerization vessel is heated up to a predetermined polymerization reaction temperature by passing hot water through the jacket to start polymerization.
- the polymerization reaction is advanced while maintaining the inside of the polymerization vessel at a predetermined reaction temperature by removing the heat of the polymerization reaction by passing cooling water through the jacket, baffle, coil and reflux condenser.
- a high-activity polymerization initiator and a low-activity polymerization initiator are used in combination to control the reaction rates in the initial stage and the final stage of the polymerization, thereby shortening the polymerization time.
- Patent Document 1 A method has been proposed (Patent Document 1). According to this method, the heat removal ability of the polymerization reactor can be effectively used in the early stage and the last stage of the polymerization, but in the middle stage of the polymerization, the heat removal ability becomes excessive and is not efficiently utilized. This tendency is particularly noticeable when a reflux condenser is used as one of the heat removal means.
- the highly active oil-soluble polymerization initiator is charged into the polymerization vessel in which the unreacted monomer is present for a long time during the polymerization, the inside of the pipe for charging the highly active oil-soluble polymerization initiator is charged. And the polymer scale adheres near the outlet. As a result, there has been a problem that the piping may be blocked. Further, since the attached scale is peeled off and mixed into the polymer, the problem that the fisheye of the obtained product is increased causes a problem.
- Patent Document 1 JP-A-6-166704
- Patent Document 2 JP-A-7-82304
- an object of the present invention is to suspend a vinyl chloride monomer or a vinyl chloride monomer and a mixture of a monomer copolymerizable therewith in a polymerization vessel provided with a reflux condenser.
- the method for producing a butyl chloride-based polymer by turbid polymerization has been improved, the polymerization time can be shortened by efficiently utilizing the heat removal capability, and the resulting polymer has very few fish eyes.
- An object of the present invention is to provide a method for producing a butyl chloride-based polymer having good quality.
- the present invention provides a method of suspending a mixture of a salt or a vinyl chloride monomer and a monomer copolymerizable therewith in a polymerization vessel equipped with a reflux condenser.
- a method for producing a vinyl chloride-based polymer including polymerizing,
- the heat removal capability of the polymerization vessel can be efficiently utilized during the polymerization time, and the polymerization time can be shortened.
- the content of the polymerization initiator remaining in the product polymer can be reduced, the formation of polymer scale in the polymerization initiator charging pipe can be prevented, and the fish eye and the initial coloring property (colored when the polymer is molded) ) Is obtained.
- the reaction rate immediately after the addition of the highly active oil-soluble polymerization initiator can be controlled by the addition of an antioxidant, and the fisheye of the obtained polymer can be improved. It becomes possible.
- an antioxidant via a piping for charging the highly active oil-soluble polymerization initiator, the reaction rate immediately after the addition of the highly active oil-soluble polymerization initiator can be more effectively controlled, so that high activity can be achieved. Even if the oil-soluble polymerization initiator remains in the charging pipe, the antioxidant also coexists, which suppresses the activation of the polymerization initiator, thereby preventing the formation of polymer scale even when the gaseous monomer comes into contact. You.
- FIG. 1 is a diagram showing an example of a charged piping facility of the present invention.
- an aqueous medium a dispersant (suspension agent), a polymerization initiator, and, if necessary, other various types are added to the polymerization vessel.
- hot water is passed through the jacket to raise the temperature in the polymerization vessel to a predetermined polymerization reaction temperature to start polymerization.
- the polymerization reaction is advanced while removing the heat of the polymerization reaction using a cooling means such as a reflux condenser while maintaining the reaction mixture in the polymerization vessel at a predetermined reaction temperature.
- the polymerization reaction is usually carried out at 3575 ° C, preferably at 45-70 ° C.
- the first feature of the present invention is that a 10-hour half-life temperature of 0.1 mol / L in benzene is 40 ° C or less for a certain period of time from the start of heat removal by a reflux condenser to the end of polymerization.
- the lower active oil-soluble polymerization initiator (hereinafter referred to as high active initiator) is added to the reaction mixture.
- the half life of the polymerization initiator means the time required for the concentration of the polymerization initiator to become 1/2 of the initial value.
- the decomposition reaction of the polymerization initiator at a certain temperature can be regarded as a primary reaction.
- 10-hour half-life temperature at a concentration of O. 1 mol / L in benzene used in the present invention refers to a method in which a polymerization initiator is dissolved in benzene at a strong concentration, and the obtained solution is sealed in a container. The temperature at which the half-life is 10 hours when left at a certain temperature.
- Examples of highly active initiators having a 10-hour half-life temperature of 40 ° C or less at an O.lmol / L concentration in benzene include, for example, acetylcyclohexylsulfonyl peroxide (in benzene).
- the high-activity initiator reacts with the reflux condenser for a certain period of time (hereinafter also referred to as "high-activity initiator addition time") until the end of the polymerization. It is added to the compound.
- the heat removal of the reflux condenser should be a specified amount of heat removal from the start of heat removal of the capacitor so that the temperature inside the polymerization vessel and the jacket temperature do not suddenly change or affect the foaming of the mixture inside the polymerization vessel. It is common to gradually increase the amount of heat removed until the temperature is reached.
- the start of addition of the highly active initiator is after the start of heat removal by the reflux condenser.
- the heat removal may be performed at the same time as the heat removal by the reflux condenser, immediately after the heat removal is started, or by applying a force after a certain time after the heat removal is started.
- Immediately after the start of heat removal means within 10 minutes from the start of heat removal.
- the addition of the highly active initiator is started simultaneously with or immediately after the start of heat removal.
- the addition of the high activity initiator may be continued until the completion of the polymerization, but it is preferably completed before the polymerization conversion reaches 75%, more preferably, the polymerization conversion is 60%.
- the addition of the high activity initiator is completed by the time When the polymerization conversion rate exceeds 75%, even if the addition is continued, the effect of shortening the polymerization time is small compared to the amount of added kashi, and it is not economical.
- the term "at the end of polymerization” means that a sufficient amount of a polymerization inhibitor (a substance having a polymerization inhibiting ability) for stopping the polymerization reaction is added to the mixture in the polymerization vessel to stop the polymerization reaction. It is when. After that, usually, the recovery of the unreacted monomer is started.
- a polymerization inhibitor a substance having a polymerization inhibiting ability
- polymerization inhibitor those generally used in the production of vinyl chloride polymers can be used.
- those generally used in the production of vinyl chloride polymers can be used.
- ⁇ -octadecyl-3- (3,5-di-t-butyl-4) is considered to have little scale adhesion to the polymerization vessel and good anti-initial coloring property of the obtained polymer.
- the amount of the polymerization inhibitor to be added is usually 0.001 to 0.3 parts by mass, preferably 0.003 to 0.1 parts by mass, more preferably 0.1 to 100 parts by mass per 100 parts by mass of all monomers. 005—0.05 parts by mass.
- This feature (II) makes it possible to efficiently utilize the heat removal capability of the polymerization vessel during the polymerization time, and to shorten the polymerization time. If the addition of the high-activity initiator is started before the heat removal by the reflux condenser is started, the heat of polymerization reaction excessively increases and exceeds the limit of the heat removal capability of the polymerization reactor, and the temperature in the polymerization reactor is reduced to a predetermined temperature. The disadvantages are that it is difficult to maintain and that the fisheye of the obtained polymer is increased.
- the charged amount of the highly active initiator is determined by using other polymerization initiators charged into the polymerization reactor from the beginning of polymerization. It can be appropriately determined according to the dose and the total heat removal capacity of the polymerization vessel used, but usually, all the monomers (butyl chloride monomer, if there are other monomers to be copolymerized, 0.0001-0.2 parts by mass, preferably 0.001 0.1 parts by mass, per 100 parts by mass of the monomer (including monomers). Force, the amount of use within such a range is desirable in that the resulting polymer has better initial coloring properties and in terms of the effect of shortening the polymerization time.
- the charging rate of the high activity initiator can be appropriately determined according to the amount of the polymerization initiator to be used from the initial stage of the polymerization and the total heat removal capacity of the polymerization vessel to be used. Further, it is 0.35% by mass of the charged amount, preferably 0.53% by mass. If the charging rate of the high-activity initiator is too high, the amount of heat generated by the polymerization reaction will increase rapidly, and the heat removal capability of the polymerization reactor will be insufficient, making it difficult to control the temperature inside the polymerization reactor to a constant level. May occur.
- the addition acceleration of the high activity initiator may be adjusted according to the heat removal ability of the polymerization vessel.
- the addition of the high activity initiator may be continuous or intermittent as long as the addition is carried out substantially continuously over the period of addition of the high activity initiator and at the above-mentioned charging rate.
- the state of the highly active initiator to be added may be a state diluted with an organic solvent, an emulsion dispersed in an aqueous medium or a suspension, or a state dispersed in an aqueous medium. It is preferable to use. Particularly, an aqueous emulsion state is preferable.
- the aqueous emulsion of a highly active initiator can be prepared by mechanically emulsifying the initiator and water.
- an emulsifier is used to improve the stability of the emulsion.
- a high activity initiator diluted with a diluent can also be used.
- a diluent for example, benzene, toluene, aliphatic hydrocarbons and the like
- plasticizers such as organic solvent ⁇ dimethyl phthalate ⁇ dioctyl phthalate.
- the content of the diluent is usually within 40% by mass of the aqueous emulsion.
- the content of the high-activity initiator is usually 5-80% by mass, and practically preferred is 10-65% by mass.
- a water-soluble alcohol added for preventing freezing an alcohol having a molecular weight of not more than is preferably used.
- an alcohol having a molecular weight of not more than is preferably used.
- the concentration of the water-soluble alcohol in the aqueous emulsion is usually from 2% by mass to 30% by mass.
- the coagulation temperature of the aqueous emulsion is set to 125 ° C or less and the viscosity can be reduced at a low temperature, the viscosity is 10%. Preference is given to amounts in excess of mass%.
- the emulsifier used in the preparation of the aqueous emulsion is selected from anionic surfactants, cationic surfactants, nonionic surfactants, and dispersants, as long as the physical properties of the obtained polymer are not affected.
- One or more emulsifiers are used. Among these, it is most preferable to use a nonionic surfactant in combination with a dispersant described below, since the stability of the aqueous emulsion as a high-activity initiator is excellent and the physical properties of the resulting polymer are good.
- nonionic surfactant for example, a polyhydric alcohol ester of a fatty acid having 10 to 22 carbon atoms is preferred.
- examples of the nonionic surfactant include mono-, di-, and tri-sorbitan fatty acid esters. Saccharose fatty acid esters of mono-, g-, tri-, tetra- and poly-, glycerin fatty acid esters of mono, g-, and tri-, propylene glycol fatty acid esters of mono- and di-, mono-, di-, tri-, tetra- These are poly-sorbitol fatty acid esters, mono-, di-, tri-, and tetra-pentaerythritol fatty acid esters.
- the fatty acid means fatty acids such as oleic acid, lauric acid, palmitic acid and stearic acid.
- HLB value of surfactant mixture When blended to achieve S1-10, a stable fine particle in aqueous emulsion Produces an emulsion of particles.
- the content of the nonionic surfactant is usually 0.0110% by mass in the aqueous emulsion of the highly active initiator. Preferably, it is 0.15% by mass.
- nonionic surfactants include Monodari MB, Nonion OP-80R, Nonion OP_85R, manufactured by NOF CORPORATION, RIKEN Vitamin And Riquemar PO-100, Riquemar 0-71-D, and the like.
- dispersant examples include guar gum, locust bean gum, trollooi, tragacanth, gum arabic, viscose, methylcellulose, ethylcellulose, hydroxyshethylcellulose, carboxymethylcellulose, soluble starch, carboxymethylstarch. , Dialdehyde starch, polyvinyl alcohol, sodium polyacrylate, partially saponified, fully saponified polyvinyl acetate. One or more selected from these can be used.
- a conventionally known apparatus For the preparation of the aqueous emulsion having a high activity initiator, a conventionally known apparatus can be used. For example, paddle type, propeller type, and turbine type mechanical rotary stirrers, colloid mills, homogenizers, high-speed shearing devices, line mixers, ultrasonic homogenizers, and the like can be used.
- a second feature of the present invention is that the antioxidant is continuously or intermittently added to the reaction mixture during at least the period of addition of the highly active initiator (that is, from the start of the addition to the end of the addition). That is.
- the antioxidant is added to the reaction mixture in the polymerization reactor via the piping for charging the highly active initiator.
- the reaction rate immediately after the addition of the high-active initiator can be more effectively controlled, and the high-active initiator remains in the charging pipe.
- the antioxidant as a result of the coexistence of the antioxidant, its activation is suppressed, and therefore, even when the gaseous monomer comes into contact, the formation of polymer scale is prevented.
- the period during which the antioxidant is added may include the period during which the high activity initiator is charged. That is, the addition of the antioxidant may be continued even after the addition of the high-activity initiator, which may be started before the addition of the high-activity initiator. It may be added continuously from the start of polymerization to the end of polymerization. From the viewpoint of preventing scale adhesion to the inside of the charging pipe and the vicinity of the outlet, the addition of the antioxidant is started before the charging of the high activity initiator is started, and after the charging of the high activity initiator is completed. 10 minutes or less It is preferable to continue the above addition and then terminate the addition.
- the addition amount of the antioxidant may be 0.00001-0.005 parts by mass per 100 parts by mass of all monomers from the viewpoints of productivity and economy, in addition to the effect of reducing fish eyes and preventing scale adhesion. More preferably, it is in the range of 0.0001 to 0.002 parts by mass. If the addition amount of the antioxidant is too small, the effect of controlling the reaction rate immediately after the addition of the high activity initiator is low, and the fisheye of the obtained polymer increases. Further, the scale easily adheres to the inside of the charging pipe and the vicinity of the outlet.
- the rate of addition of the antioxidant is usually 0.3 to 5% by mass of the addition amount per minute, preferably 0.5 to 3% by mass.
- the ratio of the flow rate of the high activity initiator / the flow rate of the antioxidant is usually 5-10000, and preferably 10-1000.
- antioxidant those generally used in the production of a vinyl chloride polymer can be used.
- n-octadecyl-3- (3,5-di-t-butyl-) is considered to have little scale adhesion to the polymerization vessel and good anti-initial coloring property of the obtained polymer.
- the method of adding the antioxidant is not particularly limited.
- a dedicated charging pipe may be provided. From the viewpoint of preventing the high activity initiator from adhering scale to the charging pipe, It is desirable that the high-activity initiator is added to the reaction mixture in the polymerization reactor via a feed pipe.
- the state of the antioxidant to be added may be in a state of being dissolved in an organic solvent or in a state of an emulsion or a suspension dispersed in an aqueous medium, and is determined according to the use form of the highly active initiator. Is preferred. That is, when the polymerization initiator is used in a state of being dissolved in an organic solvent, it is preferable to use the antioxidant in a state of being dissolved in an organic solvent.
- the antioxidant is preferably used in a state of being dispersed in an aqueous medium.
- the organic solvent used is not particularly limited.
- methanol, ethanol, isopropyl alcohol, t-butyl alcohol, acetone, hexane, isoparaffin and the like can be mentioned, and these can be used alone or in combination of two or more.
- the dispersion stabilizer used is not particularly limited.
- a water-soluble cellulose ether compound, a water-soluble partially saponified polybutyl alcohol, an anion emulsifier, a cationic emulsifier, and the like are used.
- Polyvinyl alcohol is preferred.
- the concentration of the antioxidant in the organic solvent solution or dispersion used is not particularly limited, but is usually in the range of 110 to 50% by mass, preferably 5 to 40% by mass. If the concentration is too low, when the antioxidant is used in a state dissolved in an organic solvent, there is a problem that the amount of the solvent used increases and the COD of the wastewater increases. In addition, when the antioxidant is used in a state of being dispersed in an aqueous medium, the dispersion stability of the dispersion is reduced and the antioxidant precipitates. On the other hand, if the concentration is too high, the quantitativeness at the time of charging the antioxidant decreases, and the polymerization time tends to vary.
- Another operation for preventing the scale from adhering to the supply pipe of the high activity initiator may be used in combination.
- water such as deionized water, tap water, industrial water, and soft water may be added continuously or intermittently through the charging pipe. Further, the piping may be washed with steam after the completion of the charging of the antioxidant.
- the equipment for the supply pipe for the highly active initiator and antioxidant can be added with the antioxidant continuously or intermittently to the reaction mixture in the polymerization reactor via the highly active initiator charge pipe. Desirable.
- FIG. 1 shows an example of the charged piping equipment of the present invention. Elements that are not directly related to the description, such as the stirrer and the reflux condenser, have been omitted.
- antioxidant charging pipe 4 is connected to highly active initiator charging pipe 2. As a result, the antioxidant can be continuously or intermittently added to the reaction mixture in the polymerization reactor 1 via the high activity initiator charging pipe 2.
- the other conditions of the method of the present invention are not particularly limited, and ordinary conditions used for aqueous suspension polymerization of a butyl chloride monomer or a mixture mainly containing the same and other polymerizable monomers should be employed.
- Power S can.
- the polymerization vessel used to carry out the method of the present invention is provided with a reflux condenser as a cooling means.
- a reflux condenser as a cooling means.
- jackets for heating and cooling and, although not essential, cooling It is desirable to provide a baffle, a coil, etc. having a force.
- the slurry in the polymerization vessel is withdrawn by a pump and returned to the polymerization vessel via a heat exchanger installed outside the polymerization vessel.
- a so-called external heat exchange device may be installed.
- the heat removal by the reflux condenser is started after the temperature of the mixture in the polymerization reactor reaches a predetermined polymerization reaction temperature, and thereafter, the temperature of the mixture in the polymerization reactor and the jacket temperature are not suddenly changed. Therefore, gradually increase the heat removal amount, and after reaching the predetermined heat removal amount, maintain the heat removal amount.
- Heat removal starting force of the reflux condenser The time required to reach a predetermined heat removal amount is usually 5 to 120 minutes, preferably 1560 minutes. Further, the heat removal amount of the reflux capacitor may be further changed during the polymerization period after reaching the predetermined heat removal amount.
- a suspending agent or an antifoaming agent may be added, or the number of revolutions of the stirring blade of the polymerization vessel may be adjusted.
- the monomer used in the present invention is chlorovinyl or a monomer mixture containing chlorovinyl as a main component.
- the monomer mixture containing butyl chloride as a main component is a mixture comprising at least 50% by mass or more of vinyl chloride and a monomer copolymerizable with vinyl chloride.
- Examples of monomers that can be copolymerized with vinyl chloride and vinyl chloride include vinyl ester such as vinyl acetate and vinyl propionate; and acrylate esters such as methyl acrylate and ethyl acrylate.
- methacrylic acid esters such as ethylene and propylene; maleic anhydride; acrylonitrile; styrene; vinylidene chloride and the like. These can be used alone or in combination of two or more.
- the polymerization initiator used in the early stage of the polymerization in the method of the present invention is not particularly limited, and may be any of those used in the production of conventional chloride-based polymers.
- peroxycarbonate compounds such as diisopropylperoxydicarbonate, di-2-ethylhexyloxydicarbonate, jetoxyethynoleperoxydicarbonate, di-sec-butinoleperoxydicarbonate, etc.
- the amount used is usually in the range of 0.01 to 1 part by mass, preferably 0.02 to 0.2 part by mass, per 100 parts by mass of the monomer raw material.
- the state of addition of these polymerization initiators may be a state diluted with an organic solvent, or an emulsion or a suspension dispersed in an aqueous medium. A water-based emulsion is preferred.
- the preparation of the aqueous emulsions of these polymerization initiators is similar to that described for the highly active aqueous emulsions.
- the suspension stabilizer used when the above vinyl chloride or the monomer mixture containing vinyl chloride is polymerized in an aqueous medium is not particularly limited, and the conventional vinyl chloride vinyl chloride may be used. What is used for manufacture of a system polymer may be used.
- the suspension stabilizer include water-soluble cellulose ethers such as methylcellulose, hydroxyethylcellulose, hydroxypropylcellulose and hydroxypropylmethylcellulose; water-soluble partially hydrolyzed polyvinyl alcohol, oil-soluble partially hydrolyzed polybutyl alcohol and the like. Partially modified polyvinyl alcohol; water-soluble polymers such as acrylic acid polymers and gelatin; and the like. These can be used alone or in combination of two or more.
- the total amount of these suspension stabilizers may be appropriately adjusted within the range of usually 0.02-1 part by mass per 100 parts by mass of the monomers to be charged.
- a polymerization degree regulator, a chain transfer agent, an antistatic agent, etc. which are generally used for the production of Shiridani butyl polymer, can also be appropriately used.
- the polymerization conversion at a certain point in the polymerizations performed in these Examples and Comparative Examples was determined by actually performing polymerization under the specific polymerization conditions and adding an antioxidant to the polymerization system at a specific time. The polymerization was stopped at that time, the amount of the produced polymer at that time was measured, and the polymerization conversion at that time was measured from the measured value. A number of similar polymerizations were carried out by extending the time until the termination of the polymerization by 0.5 hour, and the polymerization conversion was measured for each. Thus, the relationship between the time and the polymerization conversion was determined in advance for each specific polymerization condition, and the polymerization conversion at a certain point in time was specified based on the relationship.
- polymerization vessel 1 of No. 3 856 kg of deionized water, 206 g of partially saponified polyvinyl alcohol having a saponification degree of 79.5 mol%, and 137 g of hydroxypropyl methylcellulose having a methoxy substitution degree of 28.5 mass% and a hydroxypropoxy substitution degree of 8.9% were charged. After degassing the inside of the polymerization vessel 1 until the internal pressure became 8 kPa, 685 kg of a butyl chloride monomer was charged.
- the addition amount of the 15% by mass aqueous solution of isobutyryl peroxide in an emulsion was 400 g, and the charging rate was 6.7 g per minute.
- Predetermined amount of isobutyryl peroxy After the addition of the side, the valve 5 was closed to terminate the addition of isobutylinoleopoxide. At this time, the polymerization conversion was 39%. 10 minutes after the addition of isobutyryl peroxide, the valve 9 was closed to terminate the addition of the antioxidant.
- the addition amount of a 10% by mass aqueous emulsion solution of triethylene glycol-bis- [3_ (3_t-butyl_5_methyl_4-hydroxyphenyl) propionate] was 34 g.
- valve 8 was opened, the highly active initiator charging pipe 2 was washed with 2 L of deionized water, and the valves 6 to 8 were closed. Polymerization was continued, and when the internal pressure of the polymerization vessel 1 dropped to 0.588 MPa'G, triethylene glycol-bis- [3- (3--butyl-5-methyl-4-hydroxyphenyl) was used as a polymerization inhibitor. The polymerization reaction was stopped by adding 294 g of a 35% by mass aqueous emulsion solution of [propionate], and the unreacted monomer was recovered. The slurry, which was the reaction mixture, was taken out of the polymerization vessel, dehydrated and dried to obtain vinyl chloride. A polymer was obtained.
- Table 1 shows the polymerization time of the final batch and the state of scale adhesion near the outlet of the highly active initiator charging pipe 2 after the end of the final batch.
- Polymerization initiator (2) 15% by weight aqueous solution of isoptyryl peroxide in an emulsion solution
- Antioxidant triethylene glycol-bis- [3- (3-t-butyl-5-methyl-4-hydroxyphenyl) propionate] 10% by weight aqueous emulsion liquid
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US10/561,909 US7232867B2 (en) | 2003-12-26 | 2004-12-21 | Process for producing vinyl chloride polymer |
JP2005516588A JP4130208B2 (ja) | 2003-12-26 | 2004-12-21 | 塩化ビニル系重合体の製造方法 |
EP04807460A EP1698642B1 (en) | 2003-12-26 | 2004-12-21 | Process for producing vinyl chloride polymer |
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JP2003-434467 | 2003-12-26 | ||
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EP (1) | EP1698642B1 (ja) |
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JP2009126887A (ja) * | 2007-11-20 | 2009-06-11 | Fujifilm Corp | シリコーン樹脂の製造方法 |
JP2010155997A (ja) * | 2010-02-12 | 2010-07-15 | Shin Dai-Ichi Vinyl Corp | 重合缶内に重合開始剤及び水を導入するための導入ノズル |
CN112409526A (zh) * | 2020-11-24 | 2021-02-26 | 北京化工大学 | 一种氯乙烯-醋酸乙烯酯-丙烯酸丁酯共聚物的制备方法 |
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JP2008202034A (ja) * | 2007-01-23 | 2008-09-04 | Shin Etsu Chem Co Ltd | 懸濁重合用分散安定剤およびそれを用いた塩化ビニル系重合体の製造方法 |
KR20190069615A (ko) * | 2008-12-09 | 2019-06-19 | 제넨테크, 인크. | 항-pd-l1 항체 및 t 세포 기능을 향상시키기 위한 그의 용도 |
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PT1394186E (pt) * | 2002-08-19 | 2013-08-02 | Shinetsu Chemical Co | Misturas de iniciadores para a produção de polímeros à base de cloreto de vinilo por meio de polimerização em suspensão |
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2004
- 2004-12-21 PT PT04807460T patent/PT1698642E/pt unknown
- 2004-12-21 US US10/561,909 patent/US7232867B2/en active Active
- 2004-12-21 JP JP2005516588A patent/JP4130208B2/ja not_active Expired - Fee Related
- 2004-12-21 WO PCT/JP2004/019103 patent/WO2005063823A1/ja not_active Application Discontinuation
- 2004-12-21 EP EP04807460A patent/EP1698642B1/en not_active Not-in-force
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JPS63218711A (ja) * | 1987-03-06 | 1988-09-12 | Shin Etsu Chem Co Ltd | 塩化ビニル系重合体の製造方法 |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007039553A (ja) * | 2005-08-03 | 2007-02-15 | Shin Dai-Ichi Vinyl Corp | 重合缶内に重合開始剤及び水を導入するための導入ノズル構造 |
JP4495047B2 (ja) * | 2005-08-03 | 2010-06-30 | 新第一塩ビ株式会社 | 重合缶内に重合開始剤及び水を導入するための導入ノズル |
JP2009126887A (ja) * | 2007-11-20 | 2009-06-11 | Fujifilm Corp | シリコーン樹脂の製造方法 |
JP2010155997A (ja) * | 2010-02-12 | 2010-07-15 | Shin Dai-Ichi Vinyl Corp | 重合缶内に重合開始剤及び水を導入するための導入ノズル |
CN112409526A (zh) * | 2020-11-24 | 2021-02-26 | 北京化工大学 | 一种氯乙烯-醋酸乙烯酯-丙烯酸丁酯共聚物的制备方法 |
Also Published As
Publication number | Publication date |
---|---|
EP1698642B1 (en) | 2008-12-24 |
EP1698642A1 (en) | 2006-09-06 |
JPWO2005063823A1 (ja) | 2007-12-20 |
EP1698642A4 (en) | 2007-09-19 |
PT1698642E (pt) | 2009-01-13 |
JP4130208B2 (ja) | 2008-08-06 |
US20070100098A1 (en) | 2007-05-03 |
US7232867B2 (en) | 2007-06-19 |
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