KR100533230B1 - Apparatus for Preparing Styrene Polymer or Copolymer for Reducing Reactor Fouling - Google Patents

Abstract

The apparatus of the present invention for producing styrene homopolymers or styrene / olefin copolymers is formed spirally along the axis of rotation 2 and clocked from the starting point below the axis of rotation, so that deposits can be polymerized without forming deposits on the inner wall and top of the reactor. An inner helical wing 3 wound in the opposite direction, and an outer helical wound clockwise from the lower starting point by a plurality of supports 5 along the axis of rotation adjacent the inner wall of the reactor 1 outward of the inner helical; It consists of a double helical structure consisting of the blade (4), characterized in that a plurality of wipers (7) are attached to the outer spiral blade. The wiper is assembled to the outer spiral blade (4) by a fixed means (6) at regular intervals, made of a flexible material and rotates in contact with the inner wall of the reactor, so that the reactants are mixed well without attaching to the upper portion of the reactor, It is designed so that the reactants do not adhere to the inner wall of the reactor.

Description

Apparatus for Preparing Styrene Polymer or Copolymer for Reducing Reactor Fouling}

Field of invention

The present invention relates to a polymerization reactor capable of producing a styrene homopolymer or a styrene / ethylene copolymer having syndiotactic styrene blocks without deposits formed on the inner wall and top of the reactor. More specifically, the present invention provides a styrene homopolymer having syndiotactic styrene blocks by bulk or slurry polymerization by supplying a styrene monomer, a metallocene catalyst, and a cocatalyst to a reactor in the presence of an inert organic solvent. In preparing the styrene / ethylene copolymer, the stirring blade structure has a double structure of an inner spiral blade and an outer spiral blade, and a plurality of outer spiral blades are formed so that the polymerization can be performed without forming deposits on the inner wall and the upper portion of the reactor. It relates to a polymerization reactor, characterized in that the wiper is attached.

Background of the Invention

Styrene polymers are generally classified into atactic, isotactic and syndiotactic structures depending on the position of the benzene ring, which is the side chain with respect to the molecular chain. Atactic polystyrene means that the arrangement of the side chains is irregular, isotactic polystyrene means that the side chain is biased to one side. Syndiotactic polystyrene in this sense means that the side chains are arranged regularly alternately.

Catalysts for preparing polymers having a syndiotactic structure are metallocene catalysts and compounds of Group 4 transition metals (eg titanium (Ti), zirconium (Zr), hafnium (Hf), etc.) on the periodic table and one or two. It has a structure coupled with a ligand consisting of two cycloalkanedienyl groups (eg cyclopentadienyl group, indenyl group, fluorenyl group, etc.) or derivatives thereof. Metallocene-based catalysts have the advantage that the activity of the catalyst is very high as well as the improved physical properties than the resin produced using the existing Ziegler-Natta catalysts (Ziegler-Natta catalysts).

This metallocene catalyst is used together with a cocatalyst. In the recently developed metallocene catalyst, alkylaluminum oxane, which is a reaction product of water and an alkylaluminum compound, is used as a cocatalyst. The use of this promoter allows the production of styrene polymers having high syndiotactic stereoregularity and high molecular weight.

European Patent Publication No. 210615A2 (1987) discloses syndiotactic polystyrenes having stereoregularity, and cyclopentadienyl titanium trichloride and alkyl-substituted cyclopentadienyl titanium trichloride, ie pentamethylcyclo, for preparing the same Pentadienyl titanium trichloride is disclosed. These catalysts are known to have good catalyst activity, molecular weight and syndiotactic index.

Japanese Patent Laid-Open No. 63-191811 and Japanese Patent Laid-Open No. 3-250007 disclose metallocene catalysts having a sulfur bridge bond, but this has the disadvantage of very low catalyst production yield. In addition, Japanese Patent Laid-Open Nos. 3-258812, 4-275313 and 5-105712 disclose metallocene catalysts having alkyl bridge bonds. However, these catalysts also have a disadvantage in that the production yield of the catalyst is difficult to commercialize.

U.S. Pat.No. 4,476,476 uses alpha-olefin and styrene based compounds having higher activity and higher stereoregularity than Ziegler-Natta type catalysts using transition metal catalysts such as metallocene catalysts and reaction products of alkylaluminum and metal hydrates. A method for producing a polymer is disclosed.

Japanese Patent Laid-Open Nos. 62-104818 and 62-187708 disclose metallocene catalysts for producing styrene polymers having a syndiotactic structure. The metallocene catalyst is composed of a group IVB transition metal as a central metal and a cyclopentadienyl group derivative as a ligand. Alkyl aluminum oxane, which is a reaction product of alkyl aluminum and metal hydrate, is used as a promoter.

U.S. Pat.No. 50,267,98 also discloses a process for producing polymers with high stereoregularity and high molecular weight using metallocene catalysts.

U.S. Patent Application Nos. 08/844109 and 08/844110 disclose novel novel alkyl bimetallic metallocenes for producing syndiotactic polystyrene with good stereoregularity, high melting temperature, and good molecular weight distribution. ABBN), silyl bridge bimetallic metallocene (SBBM), and alkyl-silyl bridge bimetallic metallocene (A-SBBM) catalyst are disclosed.

The method for producing a styrene polymer having a syndiotactic structure is a bulk system or a slurry polymerization by a batch system or a continuous polymerization, in which a conventional tank-type reactor using a stirring blade is used. Has been applied. Inert solvents used for slurry polymerization include aliphatic compounds such as hexane and heptane and aromatic compounds such as toluene, xylene and ethylbenzene.

U. S. Patent No. 5037907 discloses a vertical tank reactor with stirring vanes. This process is also called liquid phase polymerization because the monomer remains in the liquid phase during the polymerization process. In theory, however, the liquid reaction medium is dispersed on the surface of the granulated material, which prevents the polymer from forming into large clumps, but in practice this reactor design still has problems with the formation of large particles that can lead to qualitative degradation (especially Monomer conversion is less than 75%).

U.S. Pat.No. 5254647 is a self-cleaning reactor that is easy to process in the form of a conventional twin screw reactive extruder. This reactor makes it possible to avoid the formation of large lumps through mixing. The washed surface reactor is configured to control the polymerization until a powdery product is obtained close to about 10-20% and the continuous polymerization takes place in a powder bed reactor such as a vertical tank design. . However, while it is possible to prevent the rapid polymerization, the use of two reactors are less economical and the one-stage washed surface reactor has the disadvantage of limiting the processing capacity of the system.

U.S. Pat.No.5484862 discloses an improved liquid, powder layer polymerization process for preparing syndiotactic polymers of aromatic vinyl monomers. The reactor introduces one or more monomers and one or more catalyst systems into a horizontal tank reactor in series for reaction and continuously removes polymerization products therefrom.

PCT International Publication No. 99/10394 discloses a polymer-containing mixture by mixing a catalyst and a first aromatic vinyl monomer in a first reverse mixing reactor under polymerization conditions to polymerize at a conversion rate of 60 to 85%, which is then polymerized. Disclosed is a process for producing a syndiotactic polymer by sending it to one or more other backmixing reactors, which are then contacted with a second aromatic vinyl monomer.

However, in the conventional method for preparing a styrenic polymer having a syndiotactic structure, when the conversion rate is 10% or more, the product produces large particles of 2 mm or more, and a non-flowable product forms a band in the upper part of the reactor, thereby forming a large deposit. Is generated, and there is a disadvantage in that a band is formed in the inner wall due to the clearance between the reactor blades and the inner wall of the reactor. These deposits have monomers and catalysts therein, and as a result, the polymerization does not proceed anymore, which results in a decrease in yield and is difficult to dry. In addition, it has a strong adhesive force and is not easily separated and causes a weakening of the stirring force when repolymerized in an attached state.

Accordingly, the inventors have found that the styrene homopolymer having syndiotactic styrene block having high activity and good molecular weight distribution without sticking to the reactor by increasing the agitation effect of the product while removing deposits on the inner wall regardless of the spacing of the reactor blades or It is early to develop a device that can produce styrene / olefin copolymers.

It is an object of the present invention to provide a device capable of producing styrene homopolymers or styrene / olefin copolymers having syndiotactic styrene blocks with no deposits on the upper or inner walls of the reactor.

Another object of the present invention is to provide a device capable of producing a styrene homopolymer or a styrene / olefin copolymer having a syndiotactic styrene block in powder form having excellent activity and good molecular weight distribution by increasing the stirring effect of the reactant. .

Another object of the present invention is to increase the agitation effect of the reactants by eliminating any deposits on the upper part or the inner wall of the reactor to increase the stirring effect of the styrene homopolymer or styrene / olefin air having a syndiotactic styrene block in powder form with excellent activity and good molecular weight distribution. It is to provide a method by which the coalescence can be prepared.

The above and other objects of the present invention can be achieved by the present invention described below.

Hereinafter, with reference to the accompanying drawings will be described in detail the contents of the present invention.

The apparatus of the present invention for producing styrene homopolymers or styrene / olefin copolymers is formed spirally along the axis of rotation 2 and clocked from the starting point below the axis of rotation, so that deposits can be polymerized without forming deposits on the inner wall and top of the reactor. An inner helical wing 3 wound in the opposite direction, and an outer helical wound clockwise from the lower starting point by a plurality of supports 5 along the axis of rotation adjacent the inner wall of the reactor 1 outward of the inner helical; It consists of a double helical structure consisting of the blade (4), characterized in that a plurality of wipers (7) are attached to the outer spiral blade.

The wiper is assembled to the outer spiral blade (4) by a fixed means (6) at regular intervals, made of a flexible material and rotates in contact with the inner wall of the reactor, so that the reactants are mixed well without attaching to the upper portion of the reactor, It is designed so that the reactants do not adhere to the inner wall of the reactor.

The apparatus of the present invention for producing styrene homopolymers or styrene / olefin copolymers comprises an inner helical blade 3 spirally formed along the axis of rotation 2 and adjacent the inner wall of the reactor 1 outwardly of the inner spiral. It consists of a double helical structure consisting of an outer helical wing 4 provided by a plurality of supports 5 along the axis of rotation, and a plurality of wipers 7 are attached to the outer helical wing.

The apparatus of the present invention can polymerize without forming deposits on the inner wall and top of the reactor. The inner helical blade 3 is a structure wound in a counterclockwise direction spirally along the rotation axis 2, the outer helical wing 4 is a plurality of supports (5) along the axis of rotation adjacent to the inner wall of the reactor (1) It is a structure wound clockwise from the starting point of the lower part.

The wiper is assembled to the outer spiral blade (4) by a fixed means (6) at regular intervals, made of a flexible material and rotates in contact with the inner wall of the reactor, so that the reactants are mixed well without attaching to the upper portion of the reactor, It is designed so that the reactants do not adhere to the inner wall of the reactor.

1 is a schematic internal perspective view of a reactor according to the present invention having a stirring blade structure capable of producing a styrene polymer or copolymer without forming deposits on the inner wall and the top of the polymerization reactor. FIG. 2 is a schematic plan view from above of the reactor of FIG.

The apparatus of the present invention can be applied to vertical or horizontal cylindrical reactors. More preferred is a vertical reactor. The reactor bottom may use a cone shape or a round bottom shape.

The stirring vanes are of double helical shape, the inner spiral vanes 3 attached to the axis of rotation 2 are wound counterclockwise from the lower starting point, and the outer outer spiral vanes 4 are outside the lower starting point. Because it is wound clockwise, when the rotating shaft 2 rotates clockwise, the inner helical blade 3 raises the reactant to the upper part of the reactor, and the outer helical blade 4 lowers the reactant to the lower part of the reactor for uniform agitation. To induce.

The rotating shaft 2 is controlled by a rotational motor (not shown), which can be easily implemented by those skilled in the art.

The outer helical blades 4 are supported by rods 5 fixed at regular intervals along the axis of rotation 2.

A plurality of scrapers are attached to the outer spiral blade 4, which is composed of fastening means 6 and wipers 7. The fixing means serves to fix the wiper, and may be any fastening means such as a bolt that can sufficiently fix the wiper regardless of its shape and size. The fixing means may be a metal such as stainless steel or a material such as tetrafluoroethylene resin (Teflon).

The wiper 7 has a function of gently scraping the reactor wall, the thickness, shape, size and the like can be adjusted appropriately, preferably bent in contact with the inner wall of the reactor. The wiper 7 may be a material that is easy to replace, flexible, and has a low surface tension and is hard to adhere to foreign matters. Preferred is tetrafluoroethylene resin (Teflon).

As the axis of rotation 2 rotates, the reactants rise to the upper wall of the reactor in the form of volcanoes, and a flexible scraper attached to the outer helical wing 4 at the top of the reactor so that the reactants do not stop, Scrape down the reaction. The number of revolutions of the inner spiral blade 3 and the outer spiral blade 4 is designed to be the same, and can be adjusted according to the reactor length.

Since the wiper is flexible, the friction with the reactor wall can be flexibly adjusted, so that the wiper can scratch the reactor wall very easily. The spacing between the outer helical blade and the reactor inner wall is preferably maintained at 3 cm or less. Preferably it maintains the space | interval about 1-2 cm.

In the present invention, styrene homopolymers and styrene / olefin copolymers having syndiotactic styrene blocks are prepared by feeding a styrene monomer, an olefin monomer, a catalyst, and a promoter to the reactor in the presence of an inert organic solvent.

The structure of the styrene monomer used in the present invention may be represented by the following general formulas (A) and (B).

In Formula (A), J ₁ is a hydrogen atom; Halogen atom; Or a substituent including at least one carbon atom, oxygen atom, silicon atom, phosphorus atom, sulfur atom, serenium or tin atom, and when m is 2 or 3, each may independently have a different substituent.

In Formula (B), J ₁ is the same as defined in Formula (A), J ₂ is a substituent consisting of C ₂ to ₁₀ having at least one unsaturated bond, m is an integer from 1 to 3, n Is 1 or 2, and when m is 2 or more and n is 2, each may independently have a different substituent.

Specific examples of the compounds having the structural formula (A) include alkyl styrene, halogenated styrene, halogen substituted alkyl styrene, alkoxy styrene, vinyl biphenyl, vinylphenylnaphthalene, vinylphenylanthracene, vinylphenylpyrene, trialkylsilylvinylbiphenyl, trialkyl Stenibiphenyl, alkylsilyl styrene, carboxymethyl styrene, alkyl ester styrene, vinyl benzene sulfonic acid ester, vinyl benzyl dialkoxy phosphide and the like.

Examples of the alkyl styrene include styrene, methyl styrene, ethyl styrene, butyl styrene, para-methyl styrene, para-tertiary-butyl styrene, and dimethyl styrene. Halogenated styrene includes chlorostyrene, bromostyrene, and fluorostyrene. Examples of the halogen-substituted alkyl styrene include chloromethyl styrene, bromomethyl styrene, and fluoromethyl styrene. Examples of the alkoxy styrene include methoxy styrene, ethoxy styrene, and butoxy styrene. -Vinylbiphenyl, 3-vinylbiphenyl, 2-vinylbiphenyl, and the like, and examples of vinylphenylnaphthalene include 1- (4-vinylbiphenylnaphthalene), 2- (4-vinylbiphenylnaphthalene), and 1- ( 3-vinyl biphenyl naphthalene), 2- (3-vinyl biphenyl naphthalene), 1- (2-vinyl biphenyl naphthalene), and the like, and examples of vinylphenyl anthracene include 1- (4-vinylphenyl) anthracene and 2- (4-vinylphenyl) anthracene, 9- (4-vinylphenyl) anthracene, 1- (3-vinylphenyl) anthracene, 9- (3-vinylphenyl) anthracene, 1- (2-vinylphenyl) anthracene, and the like. As vinylphenylpyrene, 1- (4-vinylphenyl) pyrene, 2- (4 -Vinylphenyl) pyrene, 1- (3-vinylphenyl) pyrene, 2- (3-vinylphenyl) pyrene, 1- (2-vinylphenyl) pyrene, 2- (2-vinylphenyl) pyrene, and the like. Examples of the alkyl silyl vinyl biphenyl include 4-vinyl-4-trimethylsilyl biphenyl, and the alkyl silyl styrene includes p-trimethylsilyl styrene, m-trimethylsilyl styrene, o-trimethylsilyl styrene, and p-triethyl silyl styrene. , m-triethylsilyl styrene, o-triethylsilyl styrene and the like.

Specific examples of the compounds having the structural formula (B) include divinylbenzene such as p-divinylbenzene, m-divinylbenzene and the like; Trivinylbenzene; And aryl styrene such as p-aryl styrene, m-aryl styrene and the like.

The catalyst used in the present invention is not limited as long as it is a catalyst composed of a material previously known to produce a styrenic polymer having high syndiotacticity. In general, it is a metallocene catalyst composed of a Group 4 metal compound on the periodic table. Preferably, it is a titanium compound. More detailed chemically reactive information is described in US patent applications 08/844109 and 08/844110.

In the present invention, the metallocene catalyst is used together with the promoter. Cocatalysts are organometallic compounds already known in the art, such as alkylaluminum oxane or alkyl aluminum compounds.

Representative examples of the alkylaluminum oxane include methylaluminum oxane (MAO) and modified methylaluminium oxane (MAMAO), and the aluminum aluminum oxane includes aluminum having a unit represented by the following formula (C). There are oxanes, and these include chain-shaped aluminum oxanes represented by the following general formula (D) and cyclic aluminum oxanes represented by the following general formula (E).

In the formulas (C), (D) and (E), R ₁ is an alkyl group having ₁ to ₆ and q is an integer of 0 to 100.

Alkyl aluminum compounds used as other promoters include trimethyl aluminum, triethyl aluminum, dimethylaluminum chloride, diethylaluminum chloride, triisobutylaluminum, diisobutylaluminum chloride, tri (n-butyl) aluminum and tri (n- Propyl) aluminum and triisopropyl aluminum. Preference is given to using triisobutyl aluminum.

In the present invention, the ratio of the aluminum to the Group 4 transition metal in the metallocene catalyst component, that is, the molar ratio of aluminum to the transition metal (for example, titanium, zirconium, and hafnium) in the alkyl aluminum oxane component is from 1: 1 to 1000: 1. More preferably, the range of 10: 1 to 500: 1 is good.

In the present invention, the molar ratio of alkylaluminum: transition metal in the catalyst component is in the range of 1: 1 to 10000: 1, preferably in the range of 10: 1 to 5000: 1, and more preferably 10: 1 to 1000: 1 Has a range of.

Inert organic solvents are preferably hexane, heptane, kerosine, decane, benzene, toluene, xylene, chlorobenzene, and the like, and aromatic solvents such as benzene, toluene and xylene are more preferred.

In the present invention, the polymerization temperature for polymerizing the styrene monomer is preferably in the range of 0 to 140 ° C, more preferably in the range of 30 to 100 ° C.

The production process of the present invention can be applied to the production of all polymers polymerizable with the above catalyst system in addition to the styrene-based polymer, and is particularly effective for all polymerization processes through the process of changing the state from solution, slurry to solid powder.

The manufacturing process of the present invention can be more clearly understood by the following examples, the following examples are merely illustrative purposes of the present invention and are not intended to limit the scope of the invention.

Example 1

The autoclave reactor with a capacity of 1 liter is 105 mm in diameter, the stirring blades are double helix, the outer spiral blade is 101 mm in diameter, and the outer wing and the inner wall of the reactor are 2 cm. The outer helical wing has seven scrapers attached, and the wiper is 0.5 mm thick, 35 mm wide and 3.5 cm long. The spiral blade was rotated one and a half about the axis of rotation. The temperature of the reactor was maintained at 70 ℃ before the polymerization reaction, and 200 cc of purified styrene monomer was injected. Then, 36 mmol (based on aluminum) of triisobutyl aluminum and 4.5 mmol (modified on aluminum) of modified methylaluminoxane were added thereto, stirred for 20 minutes, and then 45 μmol (based on Ti) of a metallocene catalyst. Was supplied. The metallocene catalyst consists of Cp * Ti [OC6H4C (CH3) 2C6H4O] 3TiCp * as disclosed in US patent applications 08/844109 and 08/844110. The reaction was stirred at 400 rpm and reacted for 2 hours in a well mixed state. A small amount of methanol was then added to terminate the polymerization, and the resulting mixture was washed with a large amount of methanol added with hydrochloric acid and then filtered. The styrenic polymer prepared by the above process did not adhere to the reactor inner wall at all. The physical properties of the styrene polymer thus obtained are shown in Table 1.

Comparative Example

In Example 1, the diameter of the outer spiral blade of the stirring blade was 104 mm (5 mm interval), and the same reactor was used except that there was no scraper, and the polymerization conditions were the same. As a result of the polymerization, a polymer band having a width of 2 cm and a deposit having a thickness of 3 mm or more were formed on the inner wall of the reactor. Table 1 shows that the styrene polymer prepared by the above process was washed and dried under the same conditions as in Example.

Example Polymer total yield (g) Reactor upper layer deposition amount (g) Reactor wall thickness (g) % Conversion Weight average molecular weight Molecular weight distribution Example 1 110 0 0 62 338,000 2.2 Comparative Example 1 112 23 10 62 369,000 2.3

Example 2: Ethylene / Styrene Copolymerization

The reaction temperature was maintained at 70 ° C. in the same 1 liter autoclave type reactor as in Example 1, and purified tristyrene (200 mL) was treated with triisobutyl aluminum (1 mmol) to remove impurities such as moisture. After a certain period of time, a cocatalyst, MAO (10 mmol), was added, and then the same catalyst (50 μmol) as in Example 1 was injected, and 4 Kg / cm 2 of ethylene was injected to carry out polymerization. After polymerization for about 1 hour, a small amount of methanol was added to terminate the polymerization, and the obtained mixture was poured into a large amount of methanol added with hydrochloric acid to obtain a polymer, washed with water and methanol, and then vacuum dried for several hours. The polymer (52 g) thus obtained is dissolved in boiling THF to dissolve the copolymers, thereby obtaining 36 g of the polymer. This THF melt contains 62 mol% of styrene and shows melting points at 84 ° C, 241 ° C and 264 ° C. In general, the microstructure of ethylene / styrene copolymers is known to be determined using 13 C NMR (Macromolecules, 13, 849, (1980)). Peaks of 41.83, 44.08, 45.2, and 145.79 ppm appear when two or more neighboring styrene repeat units have syndiotactic conformation with each other, especially the 41.83, 45.2 and 145.72 ppm peaks resulting from the SSS sequence. This is also shown in tick polystyrene. The copolymer of the present invention showed a characteristic peak of syndiotactic polystyrene in the portion dissolved in boiling THF, and based on this, it was found that syndiotactic polystyrene blocks exist in the ethylene / styrene copolymer. In addition, the ethylene / styrene copolymer prepared by the above process did not adhere to the reactor inner wall at all.

As a result, it was confirmed that the above process can provide an advantage that no deposits are formed on the inner wall of the reactor during homopolymerization of syndiotactic polystyrene and copolymerization with other polymerizable monomers such as olefins.

According to the present invention, a styrene polymer prepared by supplying homopolymerization of styrene monomers, copolymerization of styrene / olefins, terpolymer copolymerization with other polymerizable olefins, a metallocene catalyst and a promoter to the reactor is attached to the reactor inner wall or upper layer. There is no effect of the invention that can provide a method for producing a syndiotactic styrene polymer having excellent activity, excellent stereoregularity and good molecular weight distribution by increasing the stirring effect of the product.

All simple modifications and variations of the present invention fall within the scope of the present invention, and the specific scope of the present invention will be apparent from the appended claims.

1 is a schematic internal perspective view of a reactor according to the present invention having a stirring blade structure capable of producing a styrene polymer or copolymer without forming deposits on the inner wall and the top of the polymerization reactor.

FIG. 2 is a schematic plan view from above of the reactor of FIG.

Brief description of symbols in the drawings

1 reactor 2 rotation axis

3: inner spiral wing 4: outer spiral wing

5: rod 6: fixing means

7: wiper

Claims (7)

An inner helical blade 3 spirally formed along the axis of rotation 2 of the reactor and wound counterclockwise from a starting point below the axis of rotation, so that deposits can be polymerized without forming deposits on the inner wall and the top of the reactor, and the inner spiral A double helical structure consisting of an outer helical blade 4 wound clockwise from a lower starting point by a plurality of supports 5 along an axis of rotation adjacent the inner wall of the reactor 1 outward of And a plurality of wipers (7) attached to the outer helical blades for producing a styrene homopolymer or styrene / olefin copolymer. The method of claim 1, wherein the wiper is assembled to the outer spiral blade (4) by a fixing means (6) at regular intervals, made of a flexible material and rotated in contact with the inner wall of the reactor, so that the reactant is not attached to the upper layer of the reactor A device for producing a styrene homopolymer or a styrene / olefin copolymer, characterized in that it is mixed well and without reactants attached to the inner wall of the reactor. The apparatus of claim 1, wherein the spacing between the outer helical wing and the reactor inner wall is maintained at 3 cm or less. 4. The apparatus of claim 3 wherein the spacing between the outer helical blades and the inner wall of the reactor is maintained in the range of 1-2 cm. The device of claim 2, wherein the wiper is made of tetrafluoroethylene resin. The device for producing a styrene homopolymer or a styrene / olefin copolymer according to claim 1, wherein 3 to 10 wipers are provided per rotation of the rotary shaft. Supplying a styrene monomer, an olefin monomer, a catalyst, and a promoter in the presence of an inert organic solvent to a reactor equipped with any one of claims 1 to 6; And As the axis of rotation 2 rotates, the reactant rises to the upper wall of the reactor in the form of a volcano, and a flexible scraper attached to the outer helical wing 4 at the top of the reactor so that the reaction does not stop, Scraping the reaction down; A process for producing a styrene homopolymer or styrene / olefin copolymer having syndiotactic styrene blocks, characterized in that it comprises a step.