JP2022186162A - Method for preparing monomer mixture liquid and monomer mixture facility - Google Patents

Abstract

To provide a method for preparing a monomer mixture liquid and a monomer mixture facility which can prevent blockage of a common piping part by preventing accumulation of a monomer in the common piping part, and can obtain a predetermined monomer mixture liquid.SOLUTION: A method for preparing a monomer mixture liquid is a method for supplying each of two or more monomer components to a monomer mixture tank through a supply pipe, and preparing a monomer mixture liquid. When making each of the two or more monomer components flow into a common piping part having a plurality of inflow ports for making each of the two or more monomer components flow in the middle of one pipe communicating with the monomer mixture tank out of the supply pipe, the method for preparing the monomer mixture liquid makes the monomer having the highest Q value out of the two or more monomer components flow as a final monomer fluid with the longest distance of flowing in the common piping part in all the monomer components.SELECTED DRAWING: Figure 1B

Description

TECHNICAL FIELD The present invention relates to a method for preparing a mixed monomer solution and a monomer mixing facility.

It is common practice to produce polymers by reacting monomers (see Patent Documents 1 and 2).

Patent Literature 1 discloses that in a continuous polymerization method in which a mixture of monomers of two or more components is used for polymerization, unpolymerized monomers are recovered and returned to a monomer preparation section.

Patent Literature 2 discloses a chemical reaction apparatus having a micromixer that mixes two or more raw material liquids and supplies the mixture to a reaction tank. A micromixer is a plurality of pipes for introducing two or more kinds of raw material liquids, each of which has a micro-order diameter. It has a mixing section that mixes the two liquids together, and a fine lead-out line that is a single conduit that leads out the mixed liquid from the mixing section and has a micro-order diameter.

Japanese Patent Application Laid-Open No. 2003-292503 Japanese Patent Application Laid-Open No. 2007-307440

Various investigations have been made on polymerization conditions and the like in the polymerization. However, almost no studies have been made on methods for preparing a monomer mixture containing two or more monomers. In particular, in a polymerization reaction using two or more monomers, each monomer may be individually supplied to the polymerization tank, but each monomer may be uniformly mixed in a monomer mixing tank and used as a monomer mixture for polymerization. leads to stability of the polymerization reaction and stability of quality.

On the other hand, on an industrial scale, each monomer (contained liquid) is supplied to a monomer mixing tank through a pipe when preparing these monomer mixed liquids. In this case, although depending on the type of monomer, there is a risk that the monomer remaining in the pipe or on the wall of the pipe will polymerize, hindering the smooth supply of the monomer to the monomer mixing tank. In particular, when a highly polymerizable monomer is used, the above problems are likely to occur.

In addition, when the monomer stays, a difference occurs in the component concentration of the monomer mixed liquid. As a result, there is a possibility that a desired polymer cannot be obtained in a polymerization reaction that requires strict control. Furthermore, the polymer precipitated on the inner wall of the pipe may be mixed during the production of different lots or different types, which may cause unexpected reactions or make it impossible to obtain the desired polymer.

Therefore, the present invention provides a method for preparing a mixed monomer solution and a monomer mixing facility that can prevent clogging of the common pipe portion by preventing stagnation of the monomer in the common pipe portion and obtain a predetermined monomer mixed solution. intended to provide

One aspect of the present invention for achieving the above object is a method for preparing a monomer mixed solution by supplying each of two or more monomers to a monomer mixing tank through supply pipes to prepare a monomer mixed solution. In this method for preparing a mixed monomer solution, a common pipe having a plurality of inlets through which the monomers of the two or more components are introduced into each of the two or more components in the middle of one of the supply pipes communicating with the monomer mixing tank. When each of the two or more monomers is passed through the part, the monomer with the highest Q value among the two or more monomers is used as the last monomer fluid, and the common piping part is used among all the monomer components. Make the flowing distance the longest and let it flow.

Another aspect of the present invention for achieving the above object is a monomer mixing facility for mixing two or more monomer components to obtain a monomer mixture. The monomer mixing equipment includes a plurality of monomer storage tanks for storing two or more monomers for each component, a monomer mixing tank for mixing the two or more monomers, and the two or more components from each of the monomer storage tanks. to the monomer mixing tank, and a switching unit for switching supply and stop of supply of each of the two or more monomers via the supply pipe. The supply pipe includes a common pipe part having an inlet for allowing each of the two or more monomers to flow in each of the two or more components in the middle of one pipe communicating with the monomer mixing tank, and the monomer having the highest Q value is introduced. The length of the passage between one inflow port and the tip of the common pipe portion communicating with the monomer mixing tank is the length of the passage between the tip of the common pipe portion and another inflow port for inflowing other monomers. longer than Then, the switching unit causes the monomer having the highest Q value to flow to the common piping unit last.

According to the present invention, it is possible to prevent clogging of the common pipe by preventing the monomers from staying in the common pipe, thereby obtaining a desired monomer mixture.

1 is a schematic configuration diagram showing a polymerization facility having a monomer mixing facility according to an embodiment; FIG. It is an explanatory view explaining operation of monomer mixing equipment concerning an embodiment. It is explanatory drawing explaining other operation|movement of the monomer mixing installation which concerns on embodiment. FIG. 2 is a schematic configuration diagram showing a polymerization facility having a monomer mixing facility according to Modification 1; FIG. 10 is an explanatory diagram for explaining the operation of the monomer mixing facility according to Modification 1; FIG. 10 is a schematic configuration diagram showing a polymerization facility having a monomer mixing facility according to Modification 2; FIG. 11 is an explanatory diagram for explaining the operation of the monomer mixing facility according to Modification 2;

Hereinafter, embodiments of the present invention will be described with reference to the attached drawings. Note that the following description does not limit the technical scope or the meaning of terms described in the claims.

FIG. 1A is a schematic configuration diagram showing a polymerization facility having a monomer mixing facility 10 according to an embodiment. As shown in the figure, the polymerization equipment includes a monomer mixing equipment 10 for mixing two or more monomer components to obtain a monomer mixture, a polymerization initiator tank 80 for storing a polymerization initiator, and a monomer mixture and a polymerization initiator. and a polymerization tank 90 for performing a polymerization reaction. In FIG. 1A, the monomer mixing equipment 10 is enclosed by the dashed-two dotted line. The monomer mixed solution is supplied to the polymerization tank 90 by opening the control valve 71 . A polymerization initiator is supplied to polymerization vessel 90 by opening valve 81 . By opening the valve 91, the polymer obtained by the polymerization reaction is supplied to equipment for the next process (not shown). The monomer mixing equipment 10 is not limited to being installed in a specific polymerization equipment, and can be installed in various forms of polymerization equipment.

Generally speaking, the monomer mixing facility 10 includes a plurality of (three in the illustrated example) monomer storage tanks 30, 40 for storing two or more (three in the illustrated example) monomers 31, 41, 51 for each component, 50, a monomer mixing tank 70 for mixing the three component monomers 31, 41 and 51, and the three component monomers 31, 41 and 51 are supplied to the monomer mixing tank 70 from each of the monomer storage tanks 30, 40 and 50. and switching units 32 , 42 and 52 for switching supply and stop of supply of the three monomers 31 , 41 and 51 through the supply pipe 100 . The supply pipe 100 includes a common pipe portion 130 having inlets 131, 132, and 133 for inflowing the three components of the monomers 31, 41, and 51, respectively, in the middle of one pipe 120 communicating with the monomer mixing tank 70. contains. The length of the passage between one inlet 133 into which the monomer 51 with the highest Q value flows and the tip 120a of the common pipe section 130 communicating with the monomer mixing tank 70 is the length of the other flow into which the other monomers 31 and 41 flow. It is longer than the passage length between the inlets 131, 132 and the tip 120a of the common pipe section 130. Then, the monomer mixing equipment 10 can finally flow the monomer 51 having the highest Q value to the common piping section 130 by the switching sections 32 , 42 , and 52 .

The Q value of the monomer will be described later, but the Q value is a general parameter representing the easiness of radical polymerization. The Q value is a measure indicating that the lower the Q value, the more likely radical polymerization occurs, and the higher the Q value, the less likely radical polymerization occurs.

The configuration of the monomer mixing facility 10 according to the embodiment will be described in detail below. For convenience of explanation, the three component monomers 31, 41, and 51 are referred to as "first monomer 31," "second monomer 41," and "third monomer 51," respectively. The "first", "second", and "third" prefixes attached to each member refer to the member for the first monomer 31, the member for the second monomer 41, and the member for the third monomer 51, respectively. It represents that it is a member. The three monomer storage tanks 30, 40, 50 are also collectively referred to as "monomer storage tanks".

The monomer storage tanks include a first monomer storage tank 30 that stores the first monomer 31, a second monomer storage tank 40 that stores the second monomer 41, a third monomer storage tank 50 that stores the third monomer 51, have The first monomer storage tank 30 has a first pump 33 and a first pipe 35 . The second monomer storage tank 40 has a second pump 43 and a second pipe 45 . The third monomer storage tank 50 has a third pump 53 and a third pipe 55 .

The monomer mixing equipment 10 has one pipe 120 communicating with the monomer mixing tank 70 . One pipe 120 has a first inlet 131 , a second inlet 132 and a third inlet 133 . The first monomer storage tank 30 is connected to the first inlet 131 via the first pipe 35 . The first monomer 31 flows through the first pipe 35 from the first inlet 131 into the first pipe 120 and is supplied to the monomer mixing tank 70 . The second monomer storage tank 40 is connected to the second inlet 132 via the second pipe 45 . The second monomer 41 flows through the second pipe 45 from the second inlet 132 into the first pipe 120 and is supplied to the monomer mixing tank 70 . The third monomer storage tank 50 is connected to the third inlet 133 via the third pipe 55 . The third monomer 51 flows through the third pipe 55 from the third inlet 133 into the first pipe 120 and is supplied to the monomer mixing tank 70 .

The supply pipe 100 of the monomer mixing equipment 10 is composed of a plurality of pipes. The supply pipe 100 includes first to third pipes 35, 45, 55, one pipe 120, and the like. As described above, one pipe 120 has a first inlet 131 for the first monomer 31, a second inlet 132 for the second monomer 41, and a third inlet 133 for the third monomer 51. have The supply pipe 100 includes a common pipe portion 130 having first to third inlets 131 , 132 , 133 in the middle of one pipe 120 . More specifically, as shown by the thick line in FIG. 1A, the common pipe section 130 is one of the pipes 120, from the tip 120a communicating with the monomer mixing tank 70, the first to third inlets 131, 132, 133 is defined as the piping portion of the range including at least. In the illustrated example, the common pipe portion 130 is a pipe portion extending from the tip 120 a to the third inlet 133 .

One pipe 120 has a valve 140 at its end. The valve 140 is used for purging the common piping section 130 and the like with an inert gas such as nitrogen gas during periodic maintenance of the polymerization equipment. A detachable sealing flange may be connected to the end instead of the valve 140 . During periodic maintenance of the polymerization equipment, the sealing flange can be removed and a gas introduction line or the like can be connected.

The passage length between the third inlet 133 and the tip 120a is longer than the passage length between the second inlet 132 and the tip 120a. The passage length between the second inlet 132 and the tip 120a is longer than the passage length between the first inlet 131 and the tip 120a. Here, the “path length” is equal to the distance that each of the three component monomers 31 , 41 , 51 flows through the common piping section 130 . Depending on the layout of the equipment and piping included in the monomer mixing facility 10, the linear separation between the third inlet 133 and the monomer mixing tank 70 may be such that the first and second inlets 132, 133 and monomer mixing There are also cases where it is shorter than the straight separation distance with the bath 70 . Aisle length is the actual length of the pipe laid out.

Each of the first monomer 31, the second monomer 41, and the third monomer 51 flows between the first inlet 131 and the tip 120a of the common pipe portion 130. As shown in FIG. Each of the second monomer 41 and the third monomer 51 can flow between the second inlet 132 and the first inlet 131 of the common pipe portion 130 . Only the third monomer 51 can flow between the third inlet 133 and the second inlet 132 of the common pipe part 130 .

The first monomer 31, the second monomer 41, and the third monomer 51 have different Q values. In this embodiment, the third monomer 51 has the highest Q value, the second monomer 41 has the second highest Q value, and the first monomer 31 has the lowest Q value. Therefore, the passage length between the third inlet 133 (corresponding to one inlet) through which the third monomer 51 having the highest Q value flows and the tip 120a of the common pipe section 130 is From the passage length between the first and second inlets 131, 132 (corresponding to other inlets) for inflowing the monomers 31, 41 (corresponding to other monomers) and the tip 120a of the common pipe section 130 too long.

It is preferable that the common pipe portion 130 is inclined downward toward the monomer mixing tank 70 by 1/200 or more. This is to prevent the first to third monomers 31 , 41 , 51 from staying in the common pipe section 130 . The pipe portion in the range from the end where the valve 140 is arranged to the third inlet 133 of the one pipe 120 is also inclined downward from the above end toward the third inlet 133 by 1/200 or more. is preferred. This is because the third monomer 51 is not allowed to stay in the piping portion toward the end.

The switching units 32, 42, 52 are composed of, for example, first to third valves whose opening and closing are controlled. The first valve 32 is arranged in the first pipe 35 . When the first valve 32 is opened, the first monomer 31 in the first monomer storage tank 30 flows through the common pipe section 130 from the first inlet 131 and is supplied to the monomer mixing tank 70 . When the first valve 32 is closed, the supply of the first monomer 31 to the monomer mixing tank 70 is stopped. The second valve 42 is arranged on the second pipe 45 . When the second valve 42 is opened, the second monomer 41 in the second monomer storage tank 40 flows through the common pipe section 130 from the second inlet 132 and is supplied to the monomer mixing tank 70 . When the second valve 42 is closed, the supply of the second monomer 41 to the monomer mixing tank 70 is stopped. The third valve 52 is arranged on the third pipe 55 . When the third valve 52 is opened, the third monomer 51 in the third monomer storage tank 50 flows through the common pipe section 130 from the third inlet 133 and is supplied to the monomer mixing tank 70 . When the third valve 52 is closed, the supply of the third monomer 51 to the monomer mixing tank 70 is stopped.

The monomer mixing equipment 10 is configured to flow the third monomer 51 having the highest Q value to the common piping section 130 last by means of the first to third valves 32 , 42 , 52 . The first to third valves 32, 42, 52 are composed of, for example, pneumatically operated control valves. The controller 150 outputs opening/closing control signals to the first to third valves 32, 42, 52, respectively. The first to third valves 32, 42, 52 may be manually operated to allow the third monomer 51 having the highest Q value to flow to the common piping section 130 last.

(About Q value)
The Q value (also called “Alfrey-Pryce Q value”) is an index of the electron density of the double bond as an index representing the degree of conjugation between the double bond of the radically polymerizable monomer and its substituent. value, in 1948 T. Alfrey and C.I. C. Price, where the Q value is experimentally determined for a number of monomers, taking styrene as a reference (Q=1.0).

The Q values of typical monomers are given in J. Am. Brandrup, E. H. Immergut, E. A. Grulke, "Polymer Handbook", (USA), 4th ed., John Wiley & Sons Inc., 1999, p. II/181 to II/319, etc., which can be referred to.

In addition, the Q value is described in Document 1 (M. Fineman et al., Journal of Polymer Science, Vol. 5, p269, John Wiley & Sons Inc., 1950) and Document 2 (revised polymer synthesis Chemistry, pp. 111-116, Takayuki Otsu, Kagaku Dojin, 1992).

The Q values of representative monomers are shown in Table 1 below.

(Operation of the monomer mixing facility 10 of the embodiment)
FIG. 1B is an explanatory diagram illustrating the operation of the monomer mixing facility 10 according to the embodiment.

As shown in FIG. 1B, the Q value of the first monomer 31 is Qa, the Q value of the second monomer 41 is Qb, and the Q value of the third monomer 51 is Qc. The Q value satisfies Qa<Qb<Qc, and the Q value of the third monomer 51 is the highest. The passage length between the first inlet 131 and the tip 120a of the common pipe portion 130, that is, the distance through which the first monomer 31 flows through the common pipe portion 130 is La. The distance over which the third monomer 51 flows through the portion 130 is Lb, and the distance over which the third monomer 51 flows through the common piping portion 130 is Lc. The value of the distance is La<Lb<Lc, and the distance over which the third monomer 51 flows through the common pipe section 130 is the longest.

When the first to third monomers 31, 41, 51 are respectively supplied to the monomer mixing tank 70 through the supply pipe 100 to prepare the monomer mixture, the first to third monomers 31, 41, 51 Each of them is flowed to the common pipe portion 130 of the supply pipe 100 and supplied to the monomer mixing tank 70 in the following manner.

FIG. 1B shows a time chart showing opening and closing of the first to third valves 32, 42, 52. As shown in FIG. First, the first valve 32 for the first monomer 31 with the lowest Q value Qa is opened. The first monomer 31 in the first monomer storage tank 30 flows through the common pipe section 130 from the first inlet 131 and is supplied to the monomer mixing tank 70 . When a predetermined amount of the first monomer 31 is supplied to the monomer mixing tank 70, the first valve 32 is closed and the supply of the first monomer 31 is stopped. The distance over which the first monomer 31 flows through the common pipe portion 130 is the shortest La.

Next, the second valve 42 for the second monomer 41 having a Q value of Qb (Qa<Qb) is opened. The second monomer 41 in the second monomer storage tank 40 flows through the common pipe section 130 from the second inlet 132 and is supplied to the monomer mixing tank 70 . When a predetermined amount of the second monomer 41 is supplied to the monomer mixing tank 70 , the second valve 42 is closed to stop the supply of the second monomer 41 . The distance over which the second monomer 41 flows through the common pipe portion 130 is Lb (La<Lb).

Finally, the third valve 52 for the third monomer 51 with the highest Q value Qc (Qa<Qb<Qc) is opened. The third monomer 51 in the third monomer storage tank 50 flows through the common pipe section 130 from the third inlet 133 and is supplied to the monomer mixing tank 70 . When the predetermined amount of the third monomer 51 is supplied to the monomer mixing tank 70, the third valve 52 is closed to stop the supply of the third monomer 51. The distance over which the third monomer 51 flows through the common pipe portion 130 is the longest Lc (La<Lb<Lc).

As described above, when each of the first to third monomers 31, 41, 51 is flowed through the common pipe portion 130, the third monomer 51 with the highest Q value is the last, and the third monomer with the highest Q value is added last. The distance Lc over which the monomer 51 flows through the common pipe portion 130 is maximized.

In addition, when the first to third monomers 31, 41, 51 are respectively flowed through the common piping section 130, the order in which the Q value increases from the lowest value (the first monomer 31, the second monomer 41, the third monomer 51 order).

Furthermore, when each of the first to third monomers 31, 41, 51 is flowed through the common piping section 130, the order in which the Q value increases from the lowest value to the highest value (the first monomer 31, the second monomer 41, the third In the order of the monomer 51), the distance flowing through the common pipe portion 130 is increased (La<Lb<Lc).

By determining the size of the monomer component to be flowed last and the distance of flow through the common pipe section 130 based on the Q value, even when using a monomer that readily undergoes radical polymerization (having a low Q value), the most radial By supplying the third monomer 51 that is less likely to be polymerized, the first and second monomers 31 and 41 that are more likely to be radically polymerized do not remain in the pipe or on the wall of the pipe. As a result of being able to reduce the polymerization of the stagnant monomers, blockage of the common pipe portion 130 can be prevented, and smooth supply of the first to third monomers 31, 41, 51 to the monomer mixing tank 70 can be ensured. Since the monomer does not stagnate, a predetermined monomer mixture can be obtained without causing a difference in component concentration of the monomer mixture. As a result, a desired polymer can be obtained in a polymerization reaction that requires strict control. Furthermore, the polymer precipitated on the inner wall of the pipe does not mix in the production of different lots or different types, and the desired polymer can be obtained.

Some polymerization equipment has a form in which each of a plurality of monomers is individually introduced directly into the polymerization tank 90 . In this form, a valve for controlling the flow rate is required for each monomer line of each of the plurality of monomers. On the other hand, in this embodiment, a plurality of monomers are mixed in the monomer mixing tank 70 to prepare a monomer mixture, and then the monomer mixture is introduced into the polymerization tank 90 . In this form, one control valve 71 may be arranged. Moreover, since it is only necessary to manage the opening/closing control of one control valve 71, the control itself is easy, which contributes to a more stable polymerization reaction and higher quality stability.

As described above, in the method for preparing the monomer mixed solution of the present embodiment, each of the three components, monomers 31, 41, and 51, is placed on the way of one pipe 120 of the supply pipes 100 that communicates with the monomer mixing tank 70. When the three component monomers 31, 41, and 51 are respectively flowed into the common piping section 130 having a plurality of inlets 131, 132, and 133 for each flow, the Q value of the three component monomers 31, 41, and 51 is The highest third monomer 51 is used as the last monomer fluid, and the distance Lc flowing through the common pipe section 130 is the longest among all the monomer components. With this configuration, blockage of the common pipe portion 130 can be prevented by preventing retention of the monomers in the common pipe portion 130, and a predetermined monomer mixture can be obtained.

In addition, when the first to third monomers 31, 41, 51 are respectively flowed through the common piping section 130, the order in which the Q value increases from the lowest value (the first monomer 31, the second monomer 41, the third monomer 51 order). With this configuration, by supplying the monomer having a low Q value, that is, the monomer that is likely to undergo radical polymerization, to the monomer mixing tank 70 first, the monomer that is likely to undergo radical polymerization will not remain in the common pipe section 130. be able to. As a result, clogging of the common pipe portion 130 can be further prevented, and a higher quality monomer mixture can be obtained.

In addition, when the first to third monomers 31, 41, 51 are respectively flowed through the common piping section 130, the order in which the Q value increases from the lowest value (the first monomer 31, the second monomer 41, the third monomer 51), the distance flowing through the common pipe portion 130 is increased. With this configuration, a monomer having a low Q value, ie, a monomer that undergoes radical polymerization, is less likely to remain in the common pipe portion 130 due to a monomer that is less likely to undergo radial polymerization, which is subsequently supplied. As a result, clogging of the common pipe portion 130 can be further prevented, and a higher quality monomer mixture can be obtained.

(Other operations of the monomer mixing facility 10 of the embodiment)
FIG. 1C is an explanatory diagram illustrating another operation of the monomer mixing facility 10 according to the embodiment.

FIG. 1C shows a time chart showing opening and closing of the first to third valves 32, 42, 52. As shown in FIG. In another operation, unlike the operation described above, first, the second valve 42 for the second monomer 41 whose Q value is Qb (Qa<Qb) is opened. When a predetermined amount of the second monomer 41 is supplied to the monomer mixing tank 70 , the second valve 42 is closed to stop the supply of the second monomer 41 . The distance over which the second monomer 41 flows through the common pipe portion 130 is Lb.

Next, the first valve 32 for the first monomer 31 having the lowest Q value Qa is opened. When a predetermined amount of the first monomer 31 is supplied to the monomer mixing tank 70, the first valve 32 is closed and the supply of the first monomer 31 is stopped. The distance over which the first monomer 31 flows through the common pipe portion 130 is the shortest La (La<Lb).

Finally, the third valve 52 for the third monomer 51 with the highest Q value Qc (Qa<Qb<Qc) is opened. When the predetermined amount of the third monomer 51 is supplied to the monomer mixing tank 70, the third valve 52 is closed to stop the supply of the third monomer 51. The distance over which the third monomer 51 flows through the common pipe portion 130 is the longest Lc (La<Lb<Lc).

Also in other operations, when each of the three component monomers 31, 41, and 51 is made to flow through the common pipe portion 130, the third monomer 51, which has the highest Q value among the three component monomers 31, 41, and 51, is the last. As a monomer fluid, it is flowed with the longest distance Lc flowing through the common pipe section 130 among all the monomer components. With this configuration, blockage of the common pipe portion 130 can be prevented by preventing retention of the monomers in the common pipe portion 130, and a predetermined monomer mixture can be obtained.

(Modification 1)
FIG. 2A is a schematic configuration diagram showing a polymerization facility having a monomer mixing facility 11 according to Modification 1. FIG. The same reference numerals are given to members that are common to the embodiment, and a part of the description thereof will be omitted.

The monomer mixing facility 11 of Modification 1 is different from the monomer mixing facility 10 of the embodiment in that the solvent 61 can flow through the common piping section 230 . For convenience of explanation, the prefix "fourth" attached to each member indicates that it is a member for the solvent 61 .

The monomer mixing facility 11 of Modification 1 includes a solvent storage tank 60 that stores a solvent 61 in addition to the monomer storage tanks (the first monomer storage tank 30, the second monomer storage tank 40, and the third monomer storage tank 50). have. The solvent reservoir 60 has a fourth pump 63 and a fourth pipe 65 .

The monomer mixing equipment 11 has one pipe 220 communicating with the monomer mixing tank 70 . One pipe 220 has a first inlet 231 , a second inlet 232 , a third inlet 233 and a fourth inlet 234 . The first monomer storage tank 30 is connected to the first inlet 231 via the first pipe 35 . The first monomer 31 flows through the first pipe 35 from the first inlet 231 into the first pipe 220 and is supplied to the monomer mixing tank 70 . The second monomer storage tank 40 is connected to the second inlet 232 via the second pipe 45 . The second monomer 41 flows through the second pipe 45 from the second inlet 232 into the first pipe 220 and is supplied to the monomer mixing tank 70 . The third monomer storage tank 50 is connected to the third inlet 233 via the third pipe 55 . The third monomer 51 flows through the third pipe 55 from the third inlet 233 into the first pipe 220 and is supplied to the monomer mixing tank 70 . The solvent reservoir 60 is connected to the fourth inlet 234 via the fourth pipe 65 . The solvent 61 flows through the fourth pipe 65 from the fourth inlet 234 into the first pipe 220 and is supplied to the monomer mixing tank 70 .

The supply pipe 100 includes a common pipe portion 230 having first to fourth inlets 231 , 232 , 233 , 234 in the middle of one pipe 220 . As shown by a thick line in FIG. 2A, the common piping part 230 is one of the pipes 220 that extends from the tip 120a communicating with the monomer mixing tank 70 to the first to fourth inlets 231, 232, 233, and 234. It is defined as a section of piping that includes at least In the illustrated example, the common pipe portion 230 is a pipe portion extending from the tip 120 a to the fourth inlet 234 .

The passage length between the fourth inlet 234 and the tip 120a is longer than the passage length between the third inlet 233 and the tip 120a. The passage length between the third inlet 233 and the tip 120a is longer than the passage length between the second inlet 232 and the tip 120a. The passage length between the second inlet 232 and the tip 120a is longer than the passage length between the first inlet 231 and the tip 120a.

Each of the first monomer 31, the second monomer 41, the third monomer 51, and the solvent 61 flows between the first inlet 231 and the tip 120a of the common pipe portion 230. As shown in FIG. Each of the second monomer 41 , the third monomer 51 , and the solvent 61 can flow between the second inlet 232 and the first inlet 231 of the common pipe section 230 . The third monomer 51 and the solvent 61 can flow between the third inlet 233 and the second inlet 232 of the common pipe section 230 . Only the solvent 61 can flow between the fourth inlet 234 and the third inlet 233 of the common pipe part 230 .

Similar to the embodiment, the first monomer 31, the second monomer 41, and the third monomer 51 have different Q values, with the third monomer 51 having the highest Q value, followed by the second monomer 41 having the highest Q value. , the Q value of the first monomer 31 is the lowest. Therefore, the passage length between the third inlet 233 (corresponding to one inlet) through which the third monomer 51 having the highest Q value flows and the tip 120a of the common pipe section 230 is From the passage length between the first and second inlets 231, 232 (corresponding to other inlets) for inflowing the monomers 31, 41 (corresponding to other monomers) and the tip 120a of the common pipe section 230 too long. In Modified Example 1, the passage length between the fourth inlet 234 through which the solvent 61 is introduced and the tip 120a of the common pipe portion 230 is equal to that of the third inlet 233 through which the third monomer 51 having the highest Q value is introduced. It is longer than the passage length between the tip 120a of the common pipe portion 230 and the tip 120a.

In addition to the first to third valves 32, 42, and 52 as switching units, the monomer mixing equipment 11 of Modification 1 includes a solvent switching unit that switches between supplying and stopping the supply of the solvent 61 via the supply pipe 100. have The solvent switching unit is composed of, for example, a fourth valve 62 that is controlled to open and close. The fourth valve 62 is arranged on the fourth pipe 65 . When the fourth valve 62 is opened, the solvent 61 in the solvent storage tank 60 flows through the common pipe section 230 from the fourth inlet 234 and is supplied to the monomer mixing tank 70 . When the fourth valve 62 is closed, the supply of the solvent 61 to the monomer mixing tank 70 is stopped.

The monomer mixing equipment 11 of Modification 1 is configured so that the first to fourth valves 32 , 42 , 52 , 62 allow the solvent 61 to finally flow to the common piping section 230 . The fourth valve 62 is also composed of, for example, a pneumatically actuated control valve. The controller 150 outputs opening/closing control signals to the first to fourth valves 32, 42, 52, 62, respectively. The first to fourth valves 32 , 42 , 52 , 62 may be manually operated to allow the solvent 61 to flow to the common piping section 230 last.

(Operation of the monomer mixing equipment 11 of Modification 1)
FIG. 2B is an explanatory diagram for explaining the operation of the monomer mixing facility 11 according to Modification 1. As shown in FIG.

As shown in FIG. 2B, the Q values of the first to third monomers 31, 41, and 51 satisfy Qa<Qb<Qc, and the Q value of the third monomer 51 is the highest, as in the embodiment. Further, the distances over which the first to third monomers 31, 41, and 51 flow through the common pipe portion 230 are La<Lb<Lc as in the embodiment, and the distance over which the third monomer 51 flows through the common pipe portion 230. is the longest. The passage length between the fourth inlet 234 and the tip 120a of the common pipe portion 230, that is, the distance through which the solvent 61 flows through the common pipe portion 230 is Ld, and the distance through which the third monomer 51 flows through the common pipe portion 230 is Lc. long (Lc<Ld). Therefore, among the first to third monomers 31, 41, 51 and the solvent 61, the distance through which the solvent 61 flows through the common pipe section 230 is the longest.

When the monomer mixture is prepared by supplying the first to third monomers 31, 41, 51 and the solvent 61 to the monomer mixing tank 70 through the supply pipe 100, the first to third monomers 31, 41 , 51 and the solvent 61 are flown through the common pipe portion 230 of the supply pipe 100 and supplied to the monomer mixing tank 70 in the following manner.

FIG. 2B shows a time chart showing opening and closing of the first to fourth valves 32, 42, 52, 62. As shown in FIG. Regarding the first to third monomers 31, 41, 51, as in the embodiment, the first monomer 31 having the lowest Q value Qa is supplied first, and then the Q value is Qb (Qa<Qb ) is supplied, and then the third monomer 51 having the highest Q value Qc (Qa<Qb<Qc) is supplied. The distances flowing through the common pipe section 230 are longer in the order of the first monomer 31, the second monomer 41, and the third monomer 51 (La<Lb<Lc).

Finally, the fourth valve 62 for solvent 61 is opened. The solvent 61 in the solvent storage tank 60 flows through the common pipe section 230 from the fourth inlet 234 and is supplied to the monomer mixing tank 70 . When the predetermined amount of solvent 61 is supplied to the monomer mixing tank 70, the fourth valve 62 is closed to stop the supply of the solvent 61. The distance over which the solvent 61 flows through the common pipe section 230 is the longest Ld (La<Lb<Lc<Ld).

As described above, when each of the first to third monomers 31, 41, 51 and the solvent 61 is flowed through the common piping section 230, the third monomer 51 with the highest Q value and the solvent 61 among the solvents 61 (" The solvent 61 (the "one fluid") flows last, and the distance Ld over which the solvent 61 (the "one fluid" described above) flows through the common pipe section 230 is the longest. Regarding the three-component monomers 31, 41, and 51, as in the embodiment, the third monomer 51 having the highest Q value is used as the last monomer fluid, and the distance flowing through the common pipe section 230 among all the monomer components is Lc is made the longest to flow.

Also, as in the embodiment, when the first to third monomers 31, 41, and 51 are respectively flowed through the common piping section 230, the order in which the Q value increases from the lowest value (the first monomer 31, the second the monomer 41 and the third monomer 51 in that order).

Furthermore, as in the embodiment, when each of the first to third monomers 31, 41, 51 is passed through the common pipe section 230, the order in which the Q value increases from the lowest value (the first monomer 31, the The second monomer 41 and the third monomer 51 in this order) are flowed over a longer distance through the common pipe section 230 (La<Lb<Lc).

The last monomer component among the first to third monomers 31, 41 and 51 is determined based on the Q value, and the solvent 61 is flowed after the third monomer 51 having the highest Q value is flowed. Furthermore, the distance Ld over which the solvent 61 flows through the common pipe section 230 is made the longest. As in the embodiment, even when a monomer that readily undergoes radical polymerization (having a low Q value) is used, by finally supplying the solvent 61, the first to third monomers 31 , 41 and 51 do not remain. As a result of being able to reduce the polymerization of the stagnant monomers, blockage of the common pipe section 230 can be prevented, and smooth supply of the first to third monomers 31, 41, 51 to the monomer mixing tank 70 can be ensured. Since the monomer does not stagnate, a predetermined monomer mixture can be obtained without causing a difference in component concentration of the monomer mixture. As a result, a desired polymer can be obtained in a polymerization reaction that requires strict control. Furthermore, the polymer precipitated on the inner wall of the pipe does not mix in the production of different lots or different types, and the desired polymer can be obtained.

(Modification 2)
FIG. 3A is a schematic configuration diagram showing a polymerization facility having a monomer mixing facility 12 according to Modification 2. FIG. The same reference numerals are given to members that are common to the embodiment and Modification 1, and a part of the description thereof is omitted.

The monomer mixing equipment 12 of Modification 2 is modified in that the order in which the third monomer 51 having the highest Q value and the solvent 61 flow and the distance Lc through which the third monomer 51 flows in the common pipe section 330 is the longest. It is different from the monomer mixing equipment 11 of 1.

The monomer mixing equipment 12 of Modification 2 has one pipe 320 communicating with the monomer mixing tank 70 . One pipe 320 has a first inlet 331 , a second inlet 332 , a third inlet 333 and a fourth inlet 334 . The first monomer storage tank 30 is connected to the first inlet 331 via the first pipe 35 . The second monomer storage tank 40 is connected to the second inlet 332 via the second pipe 45 . The third monomer storage tank 50 is connected to the third inlet 333 via the third pipe 55 . The solvent reservoir 60 is connected to the fourth inlet 334 via the fourth pipe 65 .

The supply pipe 100 includes a common pipe portion 330 having first to fourth inlets 331 , 332 , 333 , 334 in the middle of one pipe 320 . As shown by a thick line in FIG. 3A , the common pipe section 330 includes first to fourth inlets 331, 332, 333, and 334 from a tip 120a of one pipe 320 that communicates with the monomer mixing tank 70. It is defined as a section of piping that includes at least In the illustrated example, the common pipe portion 330 is a pipe portion extending from the tip 120 a to the third inlet 333 .

The passage length between the third inlet 333 and the tip 120a is longer than the passage length between the fourth inlet 334 and the tip 120a. The passage length between the fourth inlet 334 and the tip 120a is longer than the passage length between the second inlet 332 and the tip 120a. The passage length between the second inlet 332 and the tip 120a is longer than the passage length between the first inlet 331 and the tip 120a.

The first monomer 31 , the second monomer 41 , the third monomer 51 , and the solvent 61 each flow between the first inlet 331 and the tip 120 a of the common pipe section 330 . Each of the second monomer 41 , the third monomer 51 , and the solvent 61 can flow between the second inlet 332 and the first inlet 331 of the common pipe section 330 . The solvent 61 and the third monomer 51 can flow between the fourth inlet 334 and the second inlet 332 of the common pipe section 330 . Only the third monomer 51 can flow between the third inlet 333 and the fourth inlet 334 of the common pipe part 330 .

As in Modification 1, the first monomer 31, the second monomer 41, and the third monomer 51 have different Q values. The third monomer 51 has the highest Q value, and the second monomer 41 has the second highest Q value. high, and the Q value of the first monomer 31 is assumed to be the lowest. Therefore, the passage length between the third inlet 333 (corresponding to one inlet) through which the third monomer 51 having the highest Q value flows and the tip 120a of the common pipe section 330 is From the passage length between the first and second inlets 331, 332 (corresponding to other inlets) for inflowing the monomers 31, 41 (corresponding to other monomers) and the tip 120a of the common pipe section 330 too long. In Modified Example 2, the length of the passage between the third inlet 333 through which the third monomer 51 having the highest Q value flows and the tip 120a of the common pipe portion 330 is the length of the fourth inlet 334 through which the solvent 61 flows. It is longer than the passage length between the tip 120 a of the common pipe portion 330 .

(Operation of the monomer mixing equipment 12 of Modification 2)
FIG. 3B is an explanatory diagram for explaining the operation of the monomer mixing facility 12 according to Modification 2. As shown in FIG.

As shown in FIG. 3B, the Q values of the first to third monomers 31, 41, and 51 satisfy Qa<Qb<Qc, and the Q value of the third monomer 51 is the highest, as in the first modification. Further, the distances over which the first to third monomers 31, 41, and 51 flow through the common pipe portion 330 are La<Lb<Lc, and the third monomer 51 flows through the common pipe portion 330, as in Modification 1. Longest distance. The path length between the third inlet 333 and the tip 120a of the common pipe portion 330, that is, the distance through which the third monomer 51 flows through the common pipe portion 330 is Lc, and the distance through which the solvent 61 flows through the common pipe portion 330 is Ld. long (Ld<Lc). Therefore, among the first to third monomers 31 , 41 , 51 and the solvent 61 , the third monomer 51 flows the longest in the common pipe section 330 .

When the monomer mixture is prepared by supplying the first to third monomers 31, 41, 51 and the solvent 61 to the monomer mixing tank 70 through the supply pipe 100, the first to third monomers 31, 41 , 51 and the solvent 61 are flowed through the common pipe portion 330 of the supply pipe 100 and supplied to the monomer mixing tank 70 in the following manner.

FIG. 3B shows a time chart showing opening and closing of the first to fourth valves 32, 42, 52, 62. As shown in FIG. Regarding the first and second monomers 31 and 41, as in Modification 1, the first monomer 31 having the lowest Q value Qa is supplied first, and then the Q value is Qb (Qa<Qb). A second monomer 41 is supplied.

Next, the fourth valve 62 for solvent 61 is opened. The solvent 61 in the solvent storage tank 60 flows through the common pipe section 330 from the fourth inlet 334 and is supplied to the monomer mixing tank 70 . When the predetermined amount of solvent 61 is supplied to the monomer mixing tank 70, the fourth valve 62 is closed to stop the supply of the solvent 61. The distance Ld over which the solvent 61 flows through the common pipe portion 330 is longer than the distance over which the first and second monomers 31 and 41 flow through the common pipe portion 330 (La<Lb<Ld).

Finally, the third valve 52 for the third monomer 51 with the highest Q value Qc (Qa<Qb<Qc) is opened. The third monomer 51 in the third monomer storage tank 50 flows through the common pipe section 330 from the third inlet 333 and is supplied to the monomer mixing tank 70 . When the predetermined amount of the third monomer 51 is supplied to the monomer mixing tank 70, the third valve 52 is closed to stop the supply of the third monomer 51. The distance over which the third monomer 51 flows through the common pipe section 330 is the longest Lc (La<Lb<Ld<Lc).

As described above, when each of the first to third monomers 31, 41, 51 and the solvent 61 is passed through the common pipe section 330, the third monomer 51 among the third monomer 51 and the solvent 61 having the highest Q value (referred to as “one fluid”) is flowed last, and the third monomer 51 (“one fluid” described above) is flowed with the longest distance Lc flowing through the common pipe section 330 . Regarding the three-component monomers 31, 41, and 51, as in the embodiment and modification 1, the third monomer 51 having the highest Q value is used as the final monomer fluid, and the common piping part is used among all the monomer components. The distance Lc flowing through 330 is made the longest.

Also, as in the embodiment and modification 1, when each of the first to third monomers 31, 41, and 51 is flowed through the common pipe section 330, the order in which the Q value increases from the lowest value to the highest value (the first monomer 31, second monomer 41, and third monomer 51).

Furthermore, as in the embodiment and modification 1, when each of the first to third monomers 31, 41, and 51 is allowed to flow through the common pipe section 330, the order in which the Q value increases from low to high (first The monomer 31, the second monomer 41, and the third monomer 51 in this order) are flowed over a longer distance through the common pipe section 330 (La<Lb<Lc).

Based on the Q value, the last monomer component among the first to third monomers 31, 41, 51 is determined, and after the solvent 61 is flowed, the third monomer 51 having the highest Q value is flowed. Furthermore, the distance Lc over which the third monomer 51 flows through the common pipe portion 330 is made the longest. As in the embodiment and modification 1, even when a monomer (having a low Q value) that readily undergoes radical polymerization is used, by finally supplying the third monomer 51 that is relatively unlikely to undergo radial polymerization, the piping The first and second monomers 31 and 41 that are more susceptible to radical polymerization do not remain inside or on the pipe walls. As a result of being able to reduce the polymerization of the stagnant monomers, blockage of the common pipe section 330 can be prevented, and smooth supply of the first to third monomers 31, 41, 51 to the monomer mixing tank 70 can be ensured. Since the monomer does not stagnate, a predetermined monomer mixture can be obtained without causing a difference in component concentration of the monomer mixture. As a result, a desired polymer can be obtained in a polymerization reaction that requires strict control. Furthermore, the polymer precipitated on the inner wall of the pipe does not mix in the production of different lots or different types, and the desired polymer can be obtained.

In Modified Example 2, the third monomer 51 is flowed after the solvent 61 is flowed. Clogging can be prevented without any trouble, and a predetermined monomer mixture can be obtained without any trouble.

(Other modifications)
Although the method for preparing the monomer mixed liquid by mixing the three components of monomers 31, 41, 51 and the monomer mixing equipment 10, 11, 12 have been described, the present invention is not limited to this case. INDUSTRIAL APPLICABILITY The present invention can be applied to a method for preparing a mixed monomer solution and a monomer mixing facility for mixing two component monomers or mixing four or more component monomers. When determining the supply order of the monomers and the distance through which the monomers flow through the common pipe based on the Q value, the present invention can also be applied to a method of preparing a mixed monomer solution and a monomer mixing facility in which four or more monomers are mixed.

(Examples of products, monomers, and solvents)
The above-described method for preparing a mixed monomer solution and the monomer mixing equipment that embodies the method are not limited to the preparation of a mixed monomer solution for manufacturing a specific product. can be applied to obtain a monomer mixture of The product, monomer, and solvent are described below by way of example.

[Product example]
Examples of products manufactured using such a monomer mixture include Epocross (registered trademark) series manufactured by Nippon Shokubai Co., Ltd. (e.g., K-2010E, K-2020E, K-2030E, WS-0300 , WS-500, WS-700, etc.).

[Type of monomer]
A radical polymerizable monomer is mentioned as a kind of a monomer (monomer). Specifically, for example, α-olefin compounds, conjugated diene compounds, halogen-containing α,β-unsaturated aliphatic hydrocarbon compounds, vinyl ester monomers, vinyl ether monomers, aliphatic (meth)acrylates, alicyclic monomers (alicyclic monomers having a ring structure), hydroxyl group-containing (meth)acrylates, aromatic monomers, carboxy group-containing monomers, silicon atom-containing monomers, fluorine atom-containing monomers, nitrogen atom-containing monomers, and epoxy group-containing monomers.

These monomers may be used alone or in combination of two or more.

(α-olefin compound)
Examples of α-olefins include ethylene, propylene, 1-butene, isobutene, 1-pentene, 1-hexene, 3-methyl-1-butene, 3,3-dimethyl-1-butene, 4-methyl-1- pentene, 1-octene, 1-decene, 1-dodecene and the like.

(Conjugated diene compound)
Examples of conjugated diene compounds include butadiene, isoprene, 2,3-dimethylbutadiene, 2-methyl-3-ethylbutadiene, 1,3-pentadiene, 3-methyl-1,3-pentadiene, 2-ethyl-1, 3-pentadiene, 1,3-hexadiene, 2-methyl-1,3-hexadiene, 3,4-dimethyl-1,3-hexadiene, 1,3-heptadiene, 3-methyl-1,3-heptadiene, 1, 3-octadiene, cyclopentadiene, chloroprene and the like.

(Halogen-Containing α,β-Unsaturated Aliphatic Hydrocarbon Compound)
Examples of halogen-containing α,β-unsaturated aliphatic hydrocarbon compounds include vinyl fluoride, vinyl chloride, vinyl bromide, vinylidene fluoride, vinylidene chloride, vinylidene bromide, and tetrafluoroethylene.

(vinyl ester monomer)
Examples of vinyl ester monomers include vinyl acetate, vinyl propionate, vinyl butyrate, vinyl caproate, vinyl caprylate, vinyl caprate, vinyl laurate, vinyl myristate, vinyl palmitate, vinyl stearate, and vinyl cyclohexanecarboxylate. , vinyl pivalate, vinyl octylate, vinyl monochloroacetate, divinyl adipate, vinyl crotonate, vinyl sorbate, vinyl benzoate, and vinyl cinnamate.

(vinyl ether monomer)
Examples of vinyl ether monomers include methyl vinyl ether, ethyl vinyl ether, n-propyl vinyl ether, isopropyl vinyl ether, n-butyl vinyl ether, isobutyl vinyl ether, tert-butyl vinyl ether, dodecyl vinyl ether, and stearyl vinyl ether.

(Aliphatic (meth)acrylate)
Examples of aliphatic (meth)acrylates include alkyl (meth)acrylates [e.g., methyl (meth)acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, isopropyl (meth)acrylate, n-butyl (meth)acrylate, ) acrylate, isobutyl (meth) acrylate, tert-butyl (meth) acrylate, sec-butyl (meth) acrylate, amyl (meth) acrylate, hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, n-octyl (meth) acrylate ) acrylate, nonyl (meth)acrylate, decyl (meth)acrylate, dodecyl (meth)acrylate, n-lauryl (meth)acrylate, tridecyl (meth)acrylate, stearyl (meth)acrylate, etc. C _1-20 alkyl (meth) acrylate], alkoxyalkyl (meth)acrylate [eg, alkoxyalkyl (meth)acrylate (eg, C _1-12 alkoxy C _1-12 alkyl methacrylate of 2-methoxyethyl (meth)acrylate, etc.)] and the like.

(Monomer having an alicyclic structure)
Monomers having an alicyclic structure include monomers having an alicyclic structure (eg, a cycloalkyl group having 4 to 20 carbon atoms, preferably a cycloalkyl group having 4 to 10 carbon atoms). Specific monomers having an alicyclic structure include, for example, alicyclic (meth)acrylates [e.g., cycloalkyl (meth)acrylates (e.g., _C4-20 cycloalkyl (meth)acrylates such as cyclohexyl (meth)acrylate, , preferably C _4-10 cycloalkyl (meth)acrylate), cycloalkylalkyl (meth)acrylate (e.g. cyclohexylmethyl (meth)acrylate, cyclohexylethyl (meth)acrylate, cyclohexylpropyl (meth)acrylate, 4-methylcyclohexyl C _4-10 cycloalkyl C _1-4 alkyl (meth)acrylates such as methyl (meth)acrylate), bridged cyclic (meth)acrylates (e.g., isobornyl (meth)acrylate, adamantyl (meth)acrylate, etc.)] mentioned.

Monomers having an alicyclic structure have substituents (e.g., alkyl groups such as methyl groups and tert-butyl groups, nitro groups, nitrile groups, alkoxyl groups, acyl groups, sulfone groups, hydroxy groups, halogen atoms, etc.). may have.

(hydroxy group-containing (meth)acrylate)
Examples of hydroxy group-containing (meth)acrylates include hydroxyalkyl (meth)acrylates [e.g., 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, 2- Hydroxy C _2-10 alkyl (meth)acrylates such as hydroxybutyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, preferably C _2-6 alkyl (meth)acrylates, more preferably C _2-4 alkyl (meth)acrylates ) acrylates], (meth)acrylates of polyols having 3 or more hydroxy groups [for example, (meth)acrylates of tri- or hexahydroxy C _3-10 polyols such as glycerin mono(meth)acrylate].

(Aromatic monomer)
Examples of aromatic monomers include styrene monomers [for example, styrene, α-alkylstyrene (for example, α-C _1-4 alkylstyrene such as α-methylstyrene), alkylstyrene (for example, C _1-4 alkylstyrene), halostyrene (e.g., chlorostyrene, etc.), alkoxystyrene (e.g., p-methoxystyrene, etc.)], aromatic (meth)acrylates [e.g., aryl (meth)acrylates (e.g., phenyl (meth) ) C _6-10 aryl (meth)acrylates such as acrylates), aralkyl (meth)acrylates (e.g. C _6-10 aryl C _1-4 alkyl (meth)acrylates such as benzyl (meth)acrylate, phenethyl (meth)acrylate ), aryloxyalkyl methacrylates (eg, C _6-10 aryloxy C _1-4 alkyl methacrylates such as phenoxyethyl methacrylate), and the like].

(Carboxy group-containing monomer)
Carboxy group-containing monomers include, for example, unsaturated monocarboxylic acids (e.g., aliphatic unsaturated monocarboxylic acids such as acrylic acid, methacrylic acid, and crotonic acid), unsaturated dicarboxylic acids and their anhydrides (e.g., maleic acid, aliphatic unsaturated dicarboxylic acids such as fumaric acid, maleic anhydride) and the like.

(Silicon atom-containing monomer)
Silicon atom-containing monomers include, for example, vinyl group-containing silanes [e.g., halosilanes having a vinyl group (e.g., vinyl mono- to trihalosilanes such as vinyltrichlorosilane), alkoxysilanes having a vinyl group [vinylalkoxysilanes (e.g., vinyltrichlorosilane), vinyl mono- to trialkoxysilanes such as methoxysilane, vinyltriethoxysilane, preferably vinyl mono- to tri-C _1-4 alkoxysilanes), vinylalkoxyalkoxysilanes (for example, vinyl mono- to tri-(C)silanes such as vinyltris(β-methoxyethoxy)silane; _1-4 alkoxy C _1-4 alkoxy)silanes, etc.], (meth)acryloyl group-containing silanes [e.g., alkoxysilanes having (meth)acryloyl groups (e.g., γ-(meth)acryloyloxypropyltrimethoxysilane, etc.) (meth)acryloyloxyalkyl mono- to trialkoxysilanes, preferably (meth)acryloyloxy C _2-4 alkyl mono- to tri-C _1-4 alkoxysilanes), trialkylsiloxyalkyl (meth)acrylates (e.g. trimethylsiloxyethyl tri-C _1-4 alkylsiloxy C _2-4 alkyl (meth)acrylates such as (meth)acrylates, etc.] and the like.

(Fluorine atom-containing monomer)
Examples of fluorine atom-containing monomers include fluorine atom-containing acrylic monomers [e.g., fluoroalkyl (meth)acrylates (e.g., trifluoroethyl (meth)acrylate, tetrafluoropropyl (meth)acrylate, octafluoropentyl (meth)acrylate fluoro-C _1-10 alkyl (meth)acrylates, preferably fluoro-C _2-6 alkyl (meth)acrylates, etc.] and the like.

(Nitrogen atom-containing monomer)
Nitrogen atom-containing monomers include, for example, (meth)acrylamide compounds {e.g., (meth)acrylamide, N-substituted (meth)acrylamides [e.g., N-alkyl (meth)acrylamides (e.g., N,N-dimethyl (meth) ) N,N-diC _1-4 alkyl (meth)acrylamide such as acrylamide; substituted aminoalkyl (meth)acrylates [e.g. N,N-diC _1-4 alkylamino C _2-4 alkyl (meth)acrylates such as dimethylaminoethyl (meth)acrylate, diethylaminoethyl (meth)acrylate], etc.}, unsaturated nitrile compounds (eg, acrylonitrile, methacrylonitrile, α-cyano(meth)acrylate, etc.);

(epoxy group-containing monomer)
Examples of epoxy group-containing monomers include epoxy group-containing (meth)acrylates [e.g., glycidyl (meth)acrylate, glycidyloxyalkyl (meth)acrylates (e.g., glycidyloxy C ₂ such as 2-glycidyloxyethyl (meth)acrylate, _-4 alkyl (meth)acrylate)], allyl glycidyl ether, and the like.

(monomer having a functional group)
A monomer having a functional group can also be used as the radically polymerizable monomer. Examples of functional groups include carbonyl groups (or carbonyl group-containing groups such as ketone groups, aldehyde groups, acyl groups, etc.), carboxy groups, acid anhydride groups, acid halide groups, carbonate groups, isocyanate groups, oxazoline groups, oxazolidine group, hydrazino group, epoxy group, amino group, hydroxy group, mercapto group and the like.

A monomer having a functional group may have these functional groups alone or in combination of two or more.

Specific functional group-containing monomers include, for example, carbonyl group-containing monomers, carboxy group-containing monomers, oxazoline group-containing monomers, and hydroxy group-containing monomers.

Examples of carbonyl group-containing monomers include unsaturated aldehydes [e.g., alkenals (e.g., C _3-10 alkenals such as acrolein and methacrolein), (meth)acryloxyalkylalkenals (e.g., acryloxyalkylpropenal, methacryl oxyalkyl propenal), formyl styrene, etc.], unsaturated ketones [e.g., alkenones (e.g., methyl vinyl ketone, ethyl vinyl ketone, vinyl butyl ketone, etc.), (meth)acryloyloxyalkanones (e.g., acetonyl acrylate, acetone Nyl methacrylate, etc.), N-(meth)acryloylaminoalkanones (e.g., diacetone acrylamide, diacetone methacrylamide, etc.), alkanediol (meth)acrylate acetylacetate (e.g., 2-hydroxypropyl acrylate acetylacetate, 2-hydroxy C _2-6 alkanediol (meth)acrylate acetylacetate such as propyl methacrylate acetylacetate, butanediol-1,4-acrylate acetylacetate), acetoacetoxyalkyl (meth)acrylates (e.g. 2-(acetoacetoxy)ethyl acrylate, 2-(acetoacetoxy)ethyl methacrylate)] and the like.

Carboxy group-containing monomers include the monomers exemplified above, such as unsaturated monocarboxylic acids (e.g., aliphatic unsaturated monocarboxylic acids such as acrylic acid, methacrylic acid, and crotonic acid), unsaturated dicarboxylic acids (e.g., maleic acids, aliphatic unsaturated monocarboxylic acids such as fumaric acid), and the like.

Examples of oxazoline group-containing monomers include alkenyloxazolines (for example, C _2-6 alkenyloxazolines such as 2-vinyl-2-oxazoline, 2-isopropenyl-2-oxazoline, preferably vinyl or isopropenyloxazoline), alkenyl- Alkyloxazolines (e.g. 2-vinyl-4-methyl-2-oxazoline, 2-vinyl-5-methyl-2-oxazoline, 2-isopropenyl-4-methyl-2-oxazoline, 2-isopropenyl-5-ethyl -C _2-6 alkenyl-C _1-10 alkyloxazoline such as 2-oxazoline, preferably vinyl or isopropenyl-C _1-4 alkyloxazoline, etc.).

Examples of hydroxy group-containing monomers include the monomers exemplified above (eg, hydroxy group-containing (meth)acrylates).

The above functional group-containing monomers can be used alone or in combination of two or more.

[Solvent type]
The solvent is not particularly limited, and examples include aromatic solvents such as toluene and xylene; alcohol solvents such as methanol, ethanol, isopropyl alcohol and n-butyl alcohol; propylene glycol methyl ether, dipropylene glycol methyl ether, ethyl Ether solvents such as cellosolve and butyl cellosolve; Ester solvents such as ethyl acetate, butyl acetate and cellosolve acetate; Ketone solvents such as acetone, methyl ethyl ketone, methyl isobutyl ketone and diacetone alcohol; Organic solvents such as amide solvents such as dimethylformamide Solvents can be mentioned. Also, an aqueous solvent such as water or a solvent containing water [mixed solvent of water and alcohol (C _1-4 alcohol such as methanol, ethanol, etc.)] may be used.

These solvents may be used alone or in combination of two or more.

10, 11, 12 monomer mixing equipment,
30 first monomer reservoir,
31 first monomer,
32 switching unit (first valve),
33 first pump,
35 first pipe,
40 second monomer reservoir,
41 second monomer,
42 switching unit (second valve),
43 second pump,
45 second pipe,
50 third monomer reservoir,
51 third monomer,
52 switching unit (third valve),
53 third pump,
55 third pipe,
60 solvent reservoir,
61 solvent,
62 solvent switching unit (fourth valve),
63 fourth pump,
65 fourth pipe,
70 monomer mixing tank,
80 polymerization initiator tank,
90 polymerization tank,
100 supply piping,
120, 220, 320 one pipe,
120a the tip of the common pipe,
130, 230, 330 common piping section,
131, 231, 331 first inlet,
132, 232, 332 second inlet,
133, 233, 333 third inlet,
150 controller,
234, 334 Fourth inlet.

Claims (4)

A method for preparing a monomer mixed solution by supplying each of two or more monomers to a monomer mixing tank through a supply pipe to prepare a monomer mixed solution,
Each of the two or more component monomers is supplied to a common pipe section having a plurality of inflow ports for allowing each component of the two or more component monomers to flow into each of the two or more component monomers on the way of one of the supply pipes communicating with the monomer mixing tank. When flowing, the monomer with the highest Q value among the two or more monomers is used as the last monomer fluid, and the distance flowing through the common pipe part is the longest among all the monomer components. , a method for preparing a monomer mixture. 2. The method for preparing a monomer mixed solution according to claim 1, wherein when each of the three or more monomers is passed through the common pipe, the Q values are passed in order from low to high. 3. The method according to claim 1, wherein when each of the three or more monomers is flown through the common pipe, the distance through the common pipe is increased in order of the Q value from low to high. A method for preparing the described monomer mixture. A monomer mixing facility for mixing two or more monomer components to obtain a monomer mixed liquid,
a plurality of monomer storage tanks storing two or more monomers for each component;
a monomer mixing tank for mixing the two or more monomers;
a supply pipe for supplying each of the two or more monomers from each of the monomer storage tanks to the monomer mixing tank;
a switching unit for switching between supplying and stopping supply of each of the two or more monomer components through the supply pipe;
The supply pipe includes a common pipe part having an inlet for allowing each of the two or more monomers to flow in each of the two or more components in the middle of one pipe communicating with the monomer mixing tank, and the monomer having the highest Q value is introduced. The length of the passage between one inflow port and the tip of the common pipe portion communicating with the monomer mixing tank is the length of the passage between the tip of the common pipe portion and the other inflow port for inflowing other monomers. longer than
A monomer mixing facility in which the switching unit causes the monomer having the highest Q value to flow last to the common piping unit.

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