JP2008174627A - Method of and apparatus for manufacturing rubbery polymer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce an equipment expense and a production cost by enhancing operability and decreasing manufacturing processes and manufacturing apparatuses in a method for manufacturing a rubbery polymer by adding a coagulant solution to a cement-like polymer solution thereby coagulating a rubbery polymer component. <P>SOLUTION: The manufacturing method of a rubbery polymer comprises a step for feeding a cement-like rubber solution and a first coagulant solution to a pump with crushing functions while coagulating the rubbery polymer component by bringing the rubber solution into contact with the first coagulant solution before the pump with crushing functions and a step for obtaining a crumb slurry containing a crumb-like rubbery polymer by crushing the coagulated rubbery polymer component inside the pump with crushing functions, where a second coagulant solution is fed directly to the inside of the pump with crushing functions when the coagulated rubbery polymer component is crushed inside the pump with crushing functions. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for producing a rubber-like polymer by adding a coagulation liquid to a cement-like rubber solution and coagulating a rubber-like polymer component, and a production apparatus used in this production method.

  In the step of producing a rubber-like polymer from a cement-like rubber solution obtained by solution polymerization, for example, as shown in FIG. 4, a cement-like rubber solution and a coagulation liquid are supplied to a large coagulation tank 110. Then, the rubber-like polymer component is solidified and the solvent is recovered through the coagulation / solvent recovery tanks 114, 116, 118 to obtain a crumb-like rubber-like polymer. Thereafter, the liquid containing the crumb-like rubber-like polymer is conveyed to a drying means with a pump or the like to obtain a dry rubber-like polymer.

  However, in the process of producing a rubber-like polymer as shown in FIG. 4, since a large coagulation tank 110 was required, the operation was complicated, the operability was poor, and a large installation space was required. Equipment costs and manufacturing costs were increased.

  In order to solve this problem, for example, in Patent Document 1, in a method for producing a rubbery polymer by adding a coagulating liquid to a polymer latex obtained by emulsion polymerization, as shown in FIG. A method is disclosed in which a polymer latex and a coagulating liquid are brought into contact with each other by using the attached pump 210 to coagulate the rubbery polymer component. In this document, the crumb slurry containing the rubber-like polymer component solidified by the pump 210 with a crushing function is then stirred in a tank 212 having a mixer 211 with a stirring / crushing function, whereby the rubber-like polymer component Promotes the coagulation. For example, when the technique of Patent Document 1 is applied to a cement-like rubber solution, as shown in FIG. 5, the solidified rubber-like polymer component is added using solvent recovery tanks 214, 216, and 218. By recovering the solvent and then transporting it to a drying means, a dry rubbery polymer can be obtained.

  However, the method disclosed in Patent Document 1 is a method for producing a rubber-like polymer from a polymer latex obtained by emulsion polymerization. Further, in this document, a pump 210 having a crushing function and Although the installation space can be reduced by using the tank 212 having the mixer 211 with the agitation / crushing function, the operability (for example, the time required for switching the type of the rubbery polymer to be produced, and the cleaning) There was room for improvement in terms of time required.

International Publication No. 2005/095496 Pamphlet

  The present invention was made in view of such a situation, and in a method for producing a rubber-like polymer by adding a coagulating liquid to a cement-like rubber solution and coagulating a rubber-like polymer component, the operability is improved, Moreover, it is an object of the present invention to provide a method and an apparatus for producing a rubber-like polymer that can reduce the production process and equipment, and can reduce the equipment cost and the production cost. In particular, it aims at simplifying the manufacturing process, reducing the coagulating liquid required for manufacturing, and improving operability (reducing the time required for switching the type of rubbery polymer to be produced and the time required for cleaning).

  In the method for producing a rubber-like polymer by adding a coagulation liquid to a cement-like rubber solution and coagulating the rubber-like polymer component, the present inventors use a pump with a crushing function, and the rubber-like polymer When the crumb slurry is obtained by coagulating the components, the timing of adding the coagulating liquid is set to a plurality of times, more specifically, the coagulating liquid is added immediately before supplying the cementitious rubber solution into the pump. And, it was found that the above-mentioned object can be achieved by dividing the rubber-like polymer component into two times when the rubber-like polymer component is crushed inside the pump, and the present invention has been completed.

That is, according to the present invention,
By bringing the cement-like rubber solution and the first coagulating liquid into contact with each other in front of the pump with a crushing function, the rubber solution and the first coagulating liquid have the crushing function while coagulating the rubber-like polymer component. Supplying the pump;
A step of obtaining a crumb slurry containing a crumb-like rubber polymer by crushing the solidified rubber-like polymer component inside the pump with a crushing function, and a method for producing a rubber-like polymer,
When crushing the rubber-like polymer component solidified inside the pump with crushing function, a second coagulation liquid is further directly supplied to the inside of the pump with crushing function. A manufacturing method is provided.

  In the present invention, since the solidification of the rubbery polymer component is performed using a pump with a crushing function, a conventionally used coagulation apparatus consisting of a large tank is no longer required, so that the number of manufacturing processes and equipment can be reduced. It is possible to reduce the equipment cost and the manufacturing cost. In addition, in the present invention, when the rubber-like polymer component is crushed inside the pump, the second coagulating liquid is directly supplied to the inside of the pump, thereby precipitating and coagulating the rubber-like polymer component. It can be promoted, and the unsolidified content in the resulting crumb slurry can be reduced. That is, the solidification of the rubbery polymer component can be almost completely advanced. Further, by separating the coagulation liquid into the first coagulation liquid and the second coagulation liquid, the rubbery polymer component can be efficiently coagulated, and the amount of coagulation liquid required for the production of the rubbery polymer (that is, The total amount of the first coagulating liquid and the second coagulating liquid) can be reduced.

  The pump with a crushing function is a pump having a function of crushing the crumb slurry obtained by bringing the cement-like rubber solution into contact with the coagulating liquid to coagulate the rubbery polymer. Good. Moreover, what is equipped with the rotary blade which has a function which discharges the said crumb slurry outside a pump is preferable.

  In the present invention, for example, when a pump equipped with the rotor blade is used, it is preferable that the cement-like rubber solution and the coagulation liquid are brought into contact with each other and supplied to the rotor blade before the flow direction. By doing in this way, it becomes possible to solidify a rubber-like polymer before a flow direction with respect to a rotary blade, and to crush the rubber-like polymer obtained by solidification with a rotary blade.

  In the present invention, it is preferable that the second coagulating liquid is supplied into the pump from the side opposite to the flow direction of the rubber solution and the first coagulating liquid into the pump with the crushing function.

  The effect of using the second coagulation liquid by supplying the second coagulation liquid from the opposite side to the flow direction of the rubber solution and the first coagulation liquid in the pump with the crushing function, that is, The effect of promoting the precipitation and solidification of the rubber-like polymer component is increased.

In the present invention, preferably, the pump with the crushing function is disposed inside the pump casing,
A first wing for crushing the solidified rubbery polymer component;
A second wing provided on an outer periphery of the first wing;
A through hole is formed between the first blade and the second blade for discharging the rubber-like polymer component crushed by the first blade from the first blade toward the second blade. And a fixed frame.

  In the present invention, it is preferable to supply the second coagulating liquid between the pump casing and the fixed frame.

  The first blade and the second blade are rotatable rotor blades, and have functions of crushing the rubber-like polymer component and discharging the obtained crumb slurry to the outside of the pump. In the present invention, together with the first wing, the discharge wing of the pump can be improved by providing the second wing on the outer periphery of the first wing via a fixed frame. It becomes possible to effectively prevent clogging of the combined components.

The first blade is a rotary blade installed on the inner side of the fixed frame and mainly intended to crush the solidified rubbery polymer component.
The second blade is provided on the outer periphery of the first blade through a fixed frame, disperses the rubber-like polymer crushed by the first blade, and the rubber-like polymer is removed from the pump together with the serum. It is a rotor blade whose main purpose is to discharge. In the present invention, it is preferable to supply the second coagulating liquid between the pump casing and the fixed frame, that is, in the rotation region of the second blade. With the two blades, the second coagulated liquid can be sufficiently stirred with respect to the serum containing the solvent and the uncoagulated component, and the precipitation and coagulation of the rubbery polymer component can be promoted.

  Moreover, in the pump with the crushing function, by forming a fixed frame between the first blade and the second blade, the rubber-like polymer component crushed to a certain size by the first blade, Since it can be further crushed by the fixing frame, the rubber-like polymer component can be sufficiently crushed, and the rubber-like polymer component can be appropriately sized to be discharged out of the pump. . In addition, a through hole for discharging from the first blade to the second blade is formed in the fixed frame, and the size of the rubbery polymer component obtained by crushing is adjusted by adjusting the size of the through hole. Can be controlled.

  The present invention further includes a step of discharging the crumb slurry from the crushing function pump and separating the rubber-like polymer and the solvent / coagulated liquid contained in the discharged crumb slurry with a screen. It is preferable.

  According to the present invention, by using the pump with the crushing function, it is possible to promote the precipitation and solidification of the rubber-like polymer component, thereby reducing the unsolidified content in the obtained crumb slurry. . Therefore, even when the crumb slurry discharged from the crushing function pump is directly supplied to the screen and the rubber-like polymer and the solvent / coagulated liquid are separated by the screen, it is caused by the precipitation of the uncoagulated content. This has the effect that clogging of the screen is unlikely to occur. In particular, the crumb slurry discharged from the pump with the crushing function is directly supplied to the screen, and by adopting a process of separating the rubber-like polymer and the solvent / coagulated liquid by the screen, the operability is improved, and The manufacturing process can be simplified.

Moreover, according to the present invention,
A cement feeding means for feeding a cement-like rubber solution;
First coagulating liquid feeding means for feeding a first coagulating liquid for coagulating the rubbery polymer component in the rubber solution;
A rubber-like weight having a crushing function pump having a suction port configured so that the rubber solution and the first coagulating liquid respectively sent by the cement feeding means and the first coagulating liquid feeding means are brought into contact with each other immediately before the inlet. A united manufacturing device,
The pump with crushing function is provided with a rubber-like polymer production apparatus provided with second coagulating liquid supply means for supplying the second coagulating liquid directly into the pump.

  In the production apparatus of the present invention, the pump with the crushing function is not particularly limited. For example, a pump with a crushing function used in the production method of the present invention described above can be used.

  According to the present invention, in the method for producing a rubber-like polymer, the rubber-like polymer component is solidified using a pump with a crushing function, so that a large-sized coagulation tank that has been conventionally used is not required, and thus a production process. In addition, it is possible to reduce the number of manufacturing equipment, and to reduce the equipment cost and the manufacturing cost. Moreover, according to the present invention, the rubber-like polymer component is coagulated by bringing the cement-like rubber solution and the first coagulating liquid into contact with each other in front of the pump with a crushing function. A configuration is adopted in which the second coagulation liquid is directly supplied into the pump while the liquid is crushed inside the pump. Therefore, precipitation and solidification of the rubber-like polymer component in the pump can be promoted, and the unsolidified content in the obtained crumb slurry can be reduced. And as a result, further simplification of the manufacturing process, reduction of the coagulating liquid required for manufacturing and further improvement of operability (especially shortening of the switching time when switching the type of rubbery polymer to be produced, Shortening of the cleaning time).

Hereinafter, the present invention will be described based on embodiments shown in the drawings.
FIG. 1 is a schematic view of an apparatus for producing a rubbery polymer according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a main part of a pump with a crushing function according to an embodiment of the present invention,
FIG. 3 is a cross-sectional view of the main part of the pump with a crushing function along the line III-III in FIG.
4 and 5 are schematic views of an apparatus for producing a rubbery polymer according to a conventional example.

  As shown in FIG. 1, the apparatus for producing a rubber-like polymer according to an embodiment of the present invention includes a pump 10 with a crushing function, a screen 12, a hold-up tank 14, and solvent recovery tanks 16 and 18. .

  First, the pump 10 with a crushing function will be described with reference to FIGS. 2 and 3. 2 is a cross-sectional view of the main part of the pump 10 with a crushing function, and FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2, that is, a cross-sectional view in a direction rotated by 90 ° about the line III-III. (In FIGS. 2 and 3, the second coagulating liquid transport pipe 40 and the discharge port 42 are arranged at positions rotated by 90 ° about the III-III line).

  As shown in FIGS. 2 and 3, the crushing function pump 10 has a pump casing 20 having a suction port 22 and a circular rotating body 24 having a first blade 26 and a second blade 28 mounted rotatably. It is. The rotating body 24 is rotationally driven together with the first blade 26 and the second blade 28 by a motor (not shown) connected to the rotating shaft 30. Further, a stator (fixed frame) 32 is disposed between the first blade 26 and the second blade 28 so as to cover the first blade 26.

  A plurality of the first blades 26 and the second blades 28 are provided on the rotating body 24. By rotating together with the rotating body 24, fluid is sucked from the suction port 22, and crumbs contained in the fluid are pulverized and dispersed. The crushed crumb can be discharged together with the fluid from the discharge port 42 (see the dotted line portion in FIG. 2 and FIG. 3).

  The first blade 26 is a rotary blade for crushing crumbs contained in the fluid sucked from the suction port 22. The first blade 26 may have a structure capable of pulverizing the crumb, but the shear rate (share rate) applied to the crushed crumb is preferably 200 [1 / s] or more, more preferably 250. ˜600 [1 / s].

  The second blade 28 is a rotary blade for dispersing and discharging the crumb crushed by the first blade 26. The second blade 28 only needs to have a structure that can disperse and discharge the crushed crumb, and is not particularly limited. However, the crumb is clogged in the gap between the stator 32 and the pump casing 20. It is preferable that the structure does not occur. That is, it is preferable that the second blades 28 have a structure that allows the crumbs discharged between the stator 32 and the pump casing 20 to be almost completely dispersed by rotating. In addition, as will be described later, the second blade 28 sufficiently stirs the second coagulated liquid supplied from the second coagulated liquid transport pipe 40 and the solvent serum so as to leave the uncoagulated component remaining in the solvent serum. There is also an effect of reducing the above.

  In the present embodiment, since the second blade 28 is formed on the outer peripheral side of the first blade 26 together with the first blade 26, the discharge head of the pump can be increased to 10 m or more, preferably 12 m or more. It is possible to effectively prevent clogging of the rubber-like polymer component.

  The stator 32 is disposed between the first blade 26 and the second blade 28 so as to cover the first blade 26. The stator 32 has a suction hole 32 a on the suction port 22 side and a side surface portion. A through hole 32b is provided. The suction hole 32 a is a through hole for sending the fluid sucked from the suction hole 22 toward the first blade 26. On the other hand, the through-hole 32b is a through-hole for discharging the crumbs crushed by the first blade 26 and having a size below a certain level from the first blade 26 toward the second blade 28. That is, the inside of the pump 10 is divided into an inner portion and an outer portion of the stator 32 through the through hole 32b, and the first blades 26 are rotatably disposed in the inner portion. The second wing 28 is rotatably disposed on the outer portion. Although not shown in the drawings, the stator 32 has a plurality of through holes 32b on the side surface thereof.

  In the present embodiment, by adjusting the shape and size of the through hole 32b of the stator 32, the size of the crumb to be discharged can be controlled, and the shape and size of the through hole 32b are not particularly limited. For example, the maximum width of the crumbs crushed by the first blade 26 and discharged toward the second blade 28 is adjusted to be about 3 to 20 mm. If the through-holes 32b are too small, the time required for crushing the crumb tends to be long, and the productivity tends to decrease.

  The suction port 22 is provided with an adapter 34 having a first coagulating liquid transport pipe 38 and a cement transport pipe 36 formed in the middle thereof. The first coagulating liquid transport pipe 38 is coagulating liquid feeding means into which the first coagulating liquid is fed. The cement transport pipe 36 is a cement feeding means for feeding a cement-like rubber solution. For example, the cement-like rubber solution polymerized in the polymerization tank can be directly conveyed to the suction port 22 of the pump 10. .

  In the present embodiment, the cement-like rubber solution and the first coagulating liquid are separately supplied to the suction port 22 via the cement transporting pipe 36 and the first coagulating liquid transporting pipe 38, respectively. The solution and the first coagulating liquid are brought into contact with each other before the flow direction of the first blade 26. For this reason, the rubber-like polymer coagulates in the vicinity of the first blade 26, and the solidified rubber-like polymer is crushed and dispersed by the plurality of first blades 26 arranged inside the stator 32. After the size is reached, the air is discharged to the second blade 28 side through the through hole 32b of the stator 32.

  In the present embodiment, as shown in FIG. 2, a second coagulating liquid transport pipe 40 is formed in the pump 10. The second coagulating liquid transport pipe 40 is a coagulating liquid feeding means for feeding the second coagulating liquid, and is configured such that the second coagulating liquid is directly supplied into the pump 10. In the present embodiment, as shown in FIG. 2, the second coagulating liquid is supplied directly between the stator 32 and the pump casing 20, that is, in a region where the second blade 28 is rotatably arranged. It has become a structure.

  By supplying the second coagulated liquid from the second coagulated liquid transport pipe 40 in this way, the second blade 28 is applied to the rubber-like polymer discharged to the second blade 28 side and the serum containing uncoagulated components. Thus, the second coagulation liquid can be sufficiently stirred and mixed. As a result, the precipitation and solidification of the rubber-like polymer component can be promoted, and the unsolidified content in the serum can be reduced. Then, the crumb slurry that has been sufficiently stirred and mixed with the second coagulating liquid and reduced in the uncoagulated content is discharged from the discharge port 42.

  The cement-like rubber solution supplied from the cement transport pipe 36 is not particularly limited. For example, an acrylonitrile-butadiene copolymer rubber (NBR) solution, a maleated NBR solution, a hydrogenated NBR solution, a malein using acetone as a solvent. Examples thereof include a hydrogenated NBR solution and the like. The polymer concentration in the cement is usually 3 to 25% by weight, preferably 10 to 20% by weight. If the polymer concentration in the cement is too low, the amount of the first and second coagulating liquids used for coagulation increases and the production cost may increase. On the other hand, if it is too high, clogging may occur in the pump 10.

  Further, as the first coagulating liquid and the second coagulating liquid supplied from the first coagulating liquid transport pipe 38 and the second coagulating liquid transport pipe 40, for example, water, methanol, ethanol or the like is preferably used. When using acetone as water, water is more preferably used. When water is used as the coagulation liquid, it may be supplied as steam. Further, as the first coagulating liquid and the second coagulating liquid, different coagulating liquids may be used, but it is preferable to use the same coagulating liquid.

  The total supply amount of the first coagulating liquid and the second coagulating liquid is preferably 100 to 2000 parts by weight, more preferably 100 to 600 parts by weight with respect to 100 parts by weight of the cement-like rubber solution. If the total supply amount of the first coagulating liquid and the second coagulating liquid is too small, the rubber polymer may be insufficiently coagulated and the pump 10 may be clogged. On the other hand, if the amount is too large, the production cost becomes high, resulting in poor productivity.

  Further, the ratio of the first coagulating liquid and the second coagulating liquid is preferably 1: 1 to 1:20, more preferably 1: 1 when [first coagulating liquid: second coagulating liquid] is used. ~ 1: 5. If the ratio of the first coagulating liquid is too small, the rubber-like polymer may not be sufficiently coagulated and clogging may occur in the pump 10. On the other hand, if the ratio of the second coagulating liquid is too small, the amount of uncoagulated remaining in the obtained crumb slurry increases, and similarly, clogging may occur in the pump 10.

  The crumb slurry discharged from the discharge port 42 of the pump 10 is separated by the screen 12 into a crumb-like rubber polymer, a recovered solvent and a coagulating liquid. Although it does not specifically limit as the screen 12, For example, a wedge screen etc. are used. Moreover, what is necessary is just to set suitably the opening of the screen to be used according to the size of the rubber polymer obtained.

  In the present embodiment, since the unsolidified content in the crumb slurry obtained by the pump 10 is reduced, the problem of clogging in the screen due to the influence of the unsolidified content remaining in the crumb slurry is effectively solved. be able to. Therefore, the process of supplying the crumb slurry obtained by the pump 10 directly to the screen 12 can be adopted, whereby the manufacturing process can be simplified and the productivity can be improved. On the other hand, if an unsolidified component remains in the crumb slurry, a problem arises in that the screen is clogged due to the deposited unsolidified component.

  The rubber-like polymer separated by the screen 12 is recovered by the solvent recovery tanks 16 and 18 via the hold-up tank 14 and the residual solvent contained in the rubber polymer is removed. In this embodiment, since the coagulability of the resulting crumb-like rubbery polymer is good (because coagulation is sufficiently accelerated), the time required for solvent recovery performed using the solvent recovery tanks 16 and 18 is reduced. It can be shortened, and this can also improve productivity.

  Thereafter, the solvent-recovered rubber polymer is subjected to a drying process, for example, discharged in the form of flakes, introduced into a baler, compressed, made into an appropriate size, and made into a product (bale).

  In the method for producing a rubber-like polymer according to this embodiment, the coagulation apparatus comprising a large-sized coagulation tank that has been conventionally used is unnecessary by coagulating the rubber-like polymer component using the pump 10 having a crushing function. Therefore, it is possible to reduce the manufacturing process and the manufacturing equipment, and it is possible to reduce the equipment cost and the manufacturing cost.

  In this embodiment, when the rubber polymer component is coagulated in the pump 10 with a crushing function, first, the first coagulating liquid supplied from the first coagulating liquid transport pipe 38 at the suction port 22 of the pump 10. Then, the second coagulating liquid is directly supplied into the pump 10 from the second coagulating liquid transport pipe 40. Therefore, the precipitation and solidification of the rubber-like polymer component in the pump 10 can be promoted, and the unsolidified content in the obtained crumb slurry can be reduced. As a result, it is possible to further simplify the manufacturing process and further improve the operability (especially shortening the switching time when switching the type of rubbery polymer to be produced, and shortening the cleaning time). Become. Furthermore, in this embodiment, the rubber-like polymer component can be efficiently coagulated by dividing the coagulation liquid into the first coagulation liquid and the second coagulation liquid, and the coagulation liquid required for the production of the rubber-like polymer can be reduced. The amount (that is, the total amount of the first coagulating liquid and the second coagulating liquid) can be reduced.

  The present invention is not limited to the above-described embodiment, and can be variously modified within the scope of the present invention.

  For example, in the above-described embodiment, an example in which only one second coagulating liquid transport pipe 40 for supplying the second coagulating liquid is formed in the pump 10 is shown. However, a plurality of second coagulating liquid transport pipes 40 are installed. However, the second coagulating liquid may be supplied from each pipe 40.

  In the above-described embodiment, the process of supplying the crumb slurry discharged from the pump 10 to the screen 12 is exemplified. However, the solvent is recovered by the solvent recovery tanks 16 and 18 via the holdup tank 14 without passing through the screen 12. You may employ | adopt the process collect | recovered.

  In the above-described embodiment, a method in which the cement-like rubber solution and the first coagulating liquid are separately fed into the pump 10 with a crushing function is illustrated. However, the cement-like rubber solution and the first coagulating liquid are exemplified. Can be put into the pump 10 with a crushing function in a state of being mixed in advance.

  Hereinafter, although this invention is demonstrated based on a more detailed Example, this invention is not limited to these Examples.

Example 1
First, a 13 wt% acetone solution of hydrogenated NBR (hydrogenated acrylonitrile-butadiene rubber) was prepared as a cement-like rubber solution.

  Next, using a acetone solution of hydrogenated NBR and water as the first coagulating liquid and the second coagulating liquid, production of hydrogenated NBR is performed by a production apparatus having the crushing function pump 10 shown in FIGS. Went.

In the present embodiment, as the pump 10 with a crushing function, an Inline Mixer (model 275LS manufactured by Silverson Co., Ltd.), as shown in FIGS. The blade 38 was formed, and the second coagulating liquid transport pipe 40 was formed so that water as the second coagulating liquid could be directly supplied into the pump. The first coagulating liquid and the second coagulating liquid were respectively supplied at a ratio of 100 parts by weight of the first coagulating liquid and 500 parts by weight of the second coagulating liquid with respect to 100 parts by weight of the cement-like rubber solution. The pump rotation speed was 3000 rpm, the flow rate was 1.1 m ³ / h, the temperature was 3 ° C., and the discharge head was 16 m.

In this embodiment, the solidification of the rubber polymer in the crumb slurry discharged from the pump discharge port (solidification in the pump), and the state of clogging of the rubber polymer in the pump (rubber in the pump) And the presence or absence of pump overload (pump overload) in the case of continuous operation for 2 hours. The results are shown in Table 1.
In addition, about the coagulation property in a pump, the case where there was no adhesion of crumbs etc. and was disperse | distributing was made favorable. Regarding the clogging of the rubber in the pump, the case where clogging did not occur inside the pump and the discharge port was considered good.

Example 2
A hydrogenated NBR was produced in the same manner as in Example 1 except that the supply ratio of the second coagulating liquid to 100 parts by weight of the cement-like rubber polymer was changed to 1000 parts by weight. Evaluation was performed. The results are shown in Table 1.

Example 3
A hydrogenated NBR was produced in the same manner as in Example 1 except that the supply ratio of the second coagulating liquid to 100 parts by weight of the cement-like rubber polymer was changed to 100 parts by weight. Evaluation was performed. The results are shown in Table 1.

Evaluation Table 1 shows the supply ratio of each solution (cement, first and second coagulating liquid), crumb concentration, crumb slurry throughput, polymer production rate, and evaluation results.
From Table 1, in Examples 1-3, when using the manufacturing apparatus which has the pump 10 with a crushing function shown in FIGS. 1-3, when coagulating liquid is divided and supplied to the 1st coagulating liquid and the 2nd coagulating liquid. Has good solidification in the pump, no clogging of the polymer in the pump, and even when continuously operated for 2 hours, the rubber polymer is satisfactorily produced without overloading the pump. It was possible to manufacture.

FIG. 1 is a schematic view of an apparatus for producing a rubbery polymer according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of a main part of a pump with a crushing function according to an embodiment of the present invention. FIG. 3 is a cross-sectional view of the main part of the pump with a crushing function along the line III-III in FIG. FIG. 4 is a schematic view of an apparatus for producing a rubbery polymer according to a conventional example. FIG. 5 is a schematic view of an apparatus for producing a rubbery polymer according to a conventional example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Pump with crushing function 12 ... Screen 14 ... Hold-up tank 16, 18 ... Solvent recovery tank 20 ... Pump casing 22 ... Suction port 24 ... Rotating body 26 ... First blade 28 ... Second blade 30 ... Rotating shaft 32 ... Stator 32a ... Suction hole 32b ... Through hole 36 ... Cement transport pipe 38 ... First coagulated liquid transport pipe 40 ... Second coagulated liquid transport pipe 42 ... Discharge port

Claims (6)

By bringing the cement-like rubber solution and the first coagulating liquid into contact with each other in front of the pump with a crushing function, the rubber solution and the first coagulating liquid have the crushing function while coagulating the rubber-like polymer component. Supplying the pump;
A step of obtaining a crumb slurry containing a crumb-like rubber polymer by crushing the solidified rubber-like polymer component inside the pump with a crushing function, and a method for producing a rubber-like polymer,
When crushing the rubber-like polymer component solidified inside the pump with crushing function, a second coagulation liquid is further directly supplied to the inside of the pump with crushing function. Production method.   2. The rubber-like polymer according to claim 1, wherein the second coagulating liquid is supplied into the pump from the opposite side to the flow direction of the rubber solution and the first coagulating liquid in the pump with the crushing function. Production method. The crushing function pump is inside the pump casing,
A first wing for crushing the solidified rubbery polymer component;
A second wing provided on an outer periphery of the first wing;
A through hole is formed between the first blade and the second blade for discharging the rubber-like polymer component crushed by the first blade from the first blade toward the second blade. The method for producing a rubbery polymer according to claim 1, comprising a fixed frame.   The method for producing a rubber-like polymer according to claim 3, wherein the second coagulating liquid is supplied between the pump casing and the fixed frame.   The said crumb slurry is further discharged from the said pump with a crushing function, and it further has the process of isolate | separating the rubber-like polymer and solvent and coagulating liquid which are contained in the discharged said crumb slurry with a screen. A method for producing a rubbery polymer according to any one of the above. A cement feeding means for feeding a cement-like rubber solution;
First coagulating liquid feeding means for feeding a first coagulating liquid for coagulating the rubbery polymer component in the rubber solution;
A rubber-like weight having a crushing function pump having a suction port configured so that the rubber solution and the first coagulating liquid respectively sent by the cement feeding means and the first coagulating liquid feeding means are brought into contact with each other immediately before the inlet. A united manufacturing device,
The crushing function-equipped pump is a rubber-like polymer manufacturing apparatus provided with second coagulating liquid supply means for supplying the second coagulating liquid directly into the pump.

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