Method for preparing monomer mixture and monomer mixing equipment

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]

[0001] The present invention relates to a method for preparing a monomer mixture and a monomer mixing facility. [Background technology]

[0002] It is common to produce a polymer by reacting monomers (see Patent Document 1 and Patent Document 2).

[0003] Patent Document 1 discloses that in a continuous polymerization method in which a monomer mixture of two or more components is used for polymerization, unpolymerized monomers are recovered and returned to a monomer preparation section.

[0004] Patent Document 2 discloses a chemical reaction device having a micromixer that mixes two or more kinds of raw material liquids and supplies the mixed liquid to a reaction tank. The micromixer has a plurality of pipes that respectively introduce two or more kinds of raw material liquids, fine inlet paths having a pipe diameter on the order of microns, a mixing section that mixes the raw material liquids by joining the fine inlet paths so that the raw material liquids join together, and a single pipe that discharges the mixed liquid from the mixing section, and a fine outlet path having a pipe diameter on the order of microns. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2003-292503 A [Patent Document 2] JP 2007-307440 A Summary of the Invention [Problem to be solved by the invention]

[0006] Various polymerization conditions in polymerization, etc. have been studied. However, there has been little study on methods for preparing a monomer mixture containing two or more components. In particular, in a polymerization reaction using two or more components of monomers, each monomer may be supplied to the polymerization tank separately. However, once the monomers are uniformly mixed in a monomer mixing tank and used for polymerization as a monomer mixture, it leads to the stability of the polymerization reaction and the stability of the quality.

[0007] On the other hand, on an industrial scale, when preparing these monomer mixtures, each monomer (containing liquid) is supplied to the monomer mixing tank through pipes. In this case, although it depends on the type of monomer, there is a risk that the monomers staying in the pipes or on the pipe walls polymerize, hindering the smooth supply of the monomers to the monomer mixing tank. In particular, when using monomers with high polymerizability, the above problems are likely to occur.

[0008] In addition, due to the retention of the monomers, differences occur in the component concentrations of the monomer mixture, etc. As a result, in a polymerization reaction that requires strict control, there is a risk that a predetermined polymer cannot be obtained. Furthermore, there is also a risk that the polymers deposited on the inner walls of the pipes, etc. are mixed during the production of other lots or other varieties, causing unexpected reactions or preventing the obtainment of a predetermined polymer.

[0009] Therefore, an object of the present invention is to provide a method for preparing a monomer mixture and monomer mixing equipment that can prevent blockage of a common piping section by preventing retention of monomers in the common piping section and can obtain a predetermined monomer mixture.

Means for Solving the Problems

[0010] One aspect of the present invention for achieving the above object is a method for preparing a monomer mixture solution, in which each of two or more monomers is supplied through a supply pipe to a monomer mixing tank to prepare a monomer mixture solution. In this method for preparing a monomer mixture solution, when each of the two or more monomers is flowed through a common pipe portion having a plurality of inlets for flowing each of the two or more monomers into the monomer mixing tank through one pipe communicating with the monomer mixing tank, Flow the monomers of the other component after finishing flowing the monomers of one component in order, Among the two or more monomers, the monomer having the highest Q value is Flow last used as the last monomer fluid and is flowed through the longest distance in the common pipe portion among all monomer components.

[0011] Another aspect of the present invention for achieving the above object is a monomer mixing facility for mixing two or more monomers to obtain a monomer mixture solution. The monomer mixing facility includes a plurality of monomer storage tanks for storing each of the two or more monomers separately, 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, and a switching unit for switching the supply and supply stop of each of the two or more monomers through the supply pipe. The supply pipe includes a common pipe portion having inlets for flowing each of the two or more monomers into the monomer mixing tank separately, and the passage length between one inlet for flowing the monomer having the highest Q value and the tip of the common pipe portion communicating with the monomer mixing tank is longer than the passage length between the other inlets for flowing other monomers and the tip of the common pipe portion. And by the switching unit, Flow in order through the common piping section so as to start flowing the monomers of the other component after finishing flowing the monomers of one component, and the monomer having the highest Q value is From the one inlet finally flowed through the common pipe portion.

Advantages of the Invention

[0012] According to the present invention, it is possible to prevent blockage of the common pipe portion by preventing retention of the monomers in the common pipe portion, and to obtain a predetermined monomer mixture solution.

Brief Description of the Drawings

[0013]

Figure 1A

Figure 1B

Figure 1C

Figure 2A

Figure 2B

Figure 3A

Figure 3B

Mode for Carrying Out the Invention

[0014] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Note that the following description does not limit the technical scope or the meaning of terms described in the claims.

[0015] 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 facility includes a monomer mixing facility 10 for mixing two or more components of monomers to obtain a monomer mixture, a polymerization initiator tank 80 for storing a polymerization initiator, and a polymerization tank 90 for performing a polymerization reaction using the monomer mixture and the polymerization initiator. In FIG. 1A, the monomer mixing facility 10 is surrounded by a two-dot chain line. The monomer mixture is supplied to the polymerization tank 90 by opening a control valve 71. The polymerization initiator is supplied to the polymerization tank 90 by opening a valve 81. The polymer obtained by the polymerization reaction is supplied to a facility in the next process (not shown) by opening a valve 91. The monomer mixing facility 10 is not limited to being provided in a specific polymerization facility, and can be provided in various forms of polymerization facilities.

[0016] The monomer mixing facility 10 generally includes a plurality (three in the illustrated example) of monomer storage tanks 30, 40, 50 for storing each of two or more components (three components in the illustrated example) of monomers 31, 41, 51, a monomer mixing tank 70 for mixing the three components of monomers 31, 41, 51, a supply pipe 100 for supplying each of the three components of monomers 31, 41, 51 from each of the monomer storage tanks 30, 40, 50 to the monomer mixing tank 70, and switching units 32, 42, 52 for switching the supply and stop of each of the three components of monomers 31, 41, 51 via the supply pipe 100. The supply pipe 100 includes a common pipe portion 130 having inlets 131, 132, 133 for allowing each of the three components of monomers 31, 41, 51 to flow in separately at a point along a single pipe 120 communicating with the monomer mixing tank 70. The passage length between one inlet 133 for allowing the monomer 51 with the highest Q value to flow in and the tip 120a of the common pipe portion 130 communicating with the monomer mixing tank 70 is longer than the passage lengths between the other inlets 131, 132 for allowing the other monomers 31, 41 to flow in and the tip 120a of the common pipe portion 130. And the monomer mixing facility 10 can cause the monomer 51 with the highest Q value to flow into the common pipe portion 130 last by the switching units 32, 42, 52.

[0017] The Q value of the monomer will be described later. The Q value is a general parameter representing the ease of radical polymerization. The Q value is a measure indicating that the lower the value, the easier radical polymerization occurs, and the higher the value, the more difficult radical polymerization occurs.

[0018] Hereinafter, the configuration of the monomer mixing facility 10 according to the embodiment will be described in detail. For convenience of explanation, each of the three monomers 31, 41, and 51 is referred to as the "first monomer 31", the "second monomer 41", and the "third monomer 51". The prefixes "first", "second", and "third" attached to each member indicate that they are members for the first monomer 31, the second monomer 41, and the third monomer 51, respectively. The three monomer storage tanks 30, 40, and 50 are also collectively referred to as the "monomer storage tank".

[0019] The monomer storage tank includes a first monomer storage tank 30 that stores the first monomer 31, a second monomer storage tank 40 that stores the second monomer 41, and a third monomer storage tank 50 that stores the third monomer 51. The first monomer storage tank 30 includes a first pump 33 and a first pipe 35. The second monomer storage tank 40 includes a second pump 43 and a second pipe 45. The third monomer storage tank 50 includes a third pump 53 and a third pipe 55.

[0020] The monomer mixing equipment 10 has a single pipe 120 communicating with the monomer mixing tank 70. The single 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 from the first inlet 131 into the single pipe 120 through the first pipe 35 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 from the second inlet 132 into the single pipe 120 through the second pipe 45 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 from the third inlet 133 into the single pipe 120 through the third pipe 55 and is supplied to the monomer mixing tank 70.

[0021] The supply pipe 100 of the monomer mixing equipment 10 is composed of a plurality of pipes. The supply pipe 100 includes the first to third pipes 35, 45, 55, and the single pipe 120, etc. As described above, the single pipe 120 has a first inlet 131 for flowing in the first monomer 31, a second inlet 132 for flowing in the second monomer 41, and a third inlet 133 for flowing in the third monomer 51. The supply pipe 100 includes a common pipe portion 130 having the first to third inlets 131, 132, 133 on the way of the single pipe 120. More specifically, as shown by the thick line in FIG. 1A, the common pipe portion 130 is defined as a pipe portion in the single pipe 120 including at least the first to third inlets 131, 132, 133 from the tip 120a communicating with the monomer mixing tank 70. In the illustrated example, the common pipe portion 130 is a pipe portion in the range from the tip 120a to the third inlet 133.

[0022] For one pipe 120, a valve 140 is arranged at the end. The valve 140 is used to purge the common pipe section 130 and the like with an inert gas such as nitrogen gas during regular maintenance of the polymerization equipment. Note that instead of the valve 140, a detachable sealing flange may be connected to the end. During regular maintenance of the polymerization equipment and the like, the sealing flange can be removed, and a gas introduction line or the like can be connected by piping.

[0023] 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 "passage length" is equal to the distance that each of the three-component monomers 31, 41, and 51 flows through the common pipe section 130. Depending on the layout of the equipment and piping included in the monomer mixing equipment 10, there may be a case where the linear separation distance between the third inlet 133 and the monomer mixing tank 70 is shorter than the linear separation distances between the first and second inlets 132, 133 and the monomer mixing tank 70. The passage length is the actual length of the laid-out piping.

[0024] Between the first inlet 131 and the tip 120a in the common pipe section 130, each of the first monomer 31, the second monomer 41, and the third monomer 51 flows. Between the second inlet 132 and the first inlet 131 in the common pipe section 130, each of the second monomer 41 and the third monomer 51 can flow. Only the third monomer 51 can flow between the third inlet 133 and the second inlet 132 in the common pipe section 130.

[0025] The Q values of the first monomer 31, the second monomer 41, and the third monomer 51 are different. In this embodiment, it is assumed that the Q value of the third monomer 51 is the highest, followed by the Q value of the second monomer 41, and the Q value of the first monomer 31 is the lowest. Therefore, the passage length between the third inlet 133 (corresponding to one inlet) for introducing the third monomer 51 with the highest Q value and the tip 120a of the common piping section 130 is longer than the passage lengths between the first and second inlets 131 and 132 (corresponding to other inlets) for introducing the first and second monomers 31 and 41 (corresponding to other monomers) and the tip 120a of the common piping section 130.

[0026] The common piping section 130 preferably slopes downward at 1 / 200 or more toward the monomer mixing tank 70. This is to prevent the first to third monomers 31, 41, and 51 from staying in the common piping section 130. The piping portion in the range from the end of the single pipe 120 where the valve 140 is disposed to the third inlet 133 also preferably slopes downward at 1 / 200 or more from the above-mentioned end toward the third inlet 133. This is to prevent the third monomer 51 from staying in the piping portion toward the above-mentioned end.

[0027] The switching units 32, 42, and 52 are composed of, for example, first to third valves that are open / closed 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 in 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 in 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.

[0028] The monomer mixing facility 10 is configured such that the third monomer 51 with the highest Q value is made to flow into the common pipe section 130 last by the first to third valves 32, 42, and 52. The first to third valves 32, 42, and 52 are composed of, for example, control valves actuated by air pressure. The controller 150 outputs an open / closed control signal to each of the first to third valves 32, 42, and 52. The first to third valves 32, 42, and 52 may be manually operated so that the third monomer 51 with the highest Q value flows into the common pipe section 130 last.

[0029] (Regarding the Q value) The Q value (also called the "Alfrey-Price Q value") is an index representing the degree of conjugation between the double bond of a radically polymerizable monomer and its substituent, and together with the e value, which is an index of the electron density of the double bond, it was proposed by T. Alfrey and C. C. Price in 1948. With styrene as the reference (Q = 1.0), the Q values of many monomers have been experimentally determined.

[0030] The Q values of typical monomers are summarized in "Polymer Handbook" by J. Brandrup, E. H. Immergut, and E. A. Grulke (USA), 4th Edition, John Wiley & Sons Inc, 1999, pp. II / 181 - II / 319, etc., and can be referred to.

[0031] Also, the Q value may be derived by the methods described in Document 1 (M. Fineman et al., Journal of Polymer Science, Volume 5, p269, John Wiley & Sons Inc, 1950) and Document 2 (Revised Chemistry of Polymer Synthesis, pp. 111 - 116, written by Takayuki Otsu, Kagaku Dojin, 1992).

[0032] The Q values of typical monomers are shown in Table 1 below.

[0033]

Table 1

[0034] (Operation of the monomer mixing equipment 10 of the embodiment) FIG. 1B is an explanatory diagram for explaining the operation of the monomer mixing equipment 10 according to the embodiment.

[0035] 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 values of the Q values are Qa < Qb < Qc, and the Q value of the third monomer 51 is the highest. Also, the passage length between the first inlet 131 of the common pipe portion 130 and the tip 120a, that is, the distance that the first monomer 31 flows through the common pipe portion 130 is La. Similarly, the distance that the second monomer 41 flows through the common pipe portion 130 is Lb, and the distance that the third monomer 51 flows through the common pipe portion 130 is Lc. The values of the distances are La < Lb < Lc, and the distance that the third monomer 51 flows through the common pipe portion 130 is the longest.

[0036] When preparing a monomer mixture by supplying each of the first to third monomers 31, 41, and 51 to a monomer mixing tank 70 via a supply pipe 100, each of the first to third monomers 31, 41, and 51 is caused to flow into a common pipe portion 130 of the supply pipe 100 as follows and is supplied to the monomer mixing tank 70.

[0037] FIG. 1B shows a time chart indicating the opening and closing of the first to third valves 32, 42, and 52. First, the first valve 32 for the first monomer 31, which has the lowest Q value Qa, is opened. The first monomer 31 in the first monomer storage tank 30 flows from the first inlet 131 through the common pipe portion 130 and is supplied to the monomer mixing tank 70. When a predetermined specified amount of the first monomer 31 has been 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 that the first monomer 31 flows through the common pipe portion 130 is the shortest La.

[0038] Next, the second valve 42 for the second monomer 41, whose Q value is Qb (Qa < Qb), is opened. The second monomer 41 in the second monomer storage tank 40 flows from the second inlet 132 through the common pipe portion 130 and is supplied to the monomer mixing tank 70. When a predetermined specified amount of the second monomer 41 has been supplied to the monomer mixing tank 70, the second valve 42 is closed and the supply of the second monomer 41 is stopped. The distance that the second monomer 41 flows through the common pipe portion 130 is Lb (La < Lb).

[0039] Finally, the third valve 52 for the third monomer 51, whose Q value is the highest Qc (Qa < Qb < Qc), is opened. The third monomer 51 in the third monomer storage tank 50 flows from the third inlet 133 through the common pipe portion 130 and is supplied to the monomer mixing tank 70. When a predetermined specified amount of the third monomer 51 has been supplied to the monomer mixing tank 70, the third valve 52 is closed and the supply of the third monomer 51 is stopped. The distance that the third monomer 51 flows through the common pipe portion 130 is the longest Lc (La < Lb < Lc).

[0040] As described above, when flowing the first to third monomers 31, 41, and 51 through the common piping section 130, the third monomer 51 with the highest Q value is flowed last, and the distance Lc that the third monomer 51 with the highest Q value flows through the common piping section 130 is made the longest.

[0041] Also, when flowing the first to third monomers 31, 41, and 51 through the common piping section 130, they are flowed in the order from the lowest Q value to the highest Q value (in the order of the first monomer 31, the second monomer 41, and the third monomer 51).

[0042] Furthermore, when flowing the first to third monomers 31, 41, and 51 through the common piping section 130, the distance that the common piping section 130 is flowed through is made longer in the order from the lowest Q value to the highest Q value (in the order of the first monomer 31, the second monomer 41, and the third monomer 51) (La < Lb < Lc).

[0043] By determining the monomer component to be flowed last and the magnitude of the distance flowing through the common piping section 130 based on the Q value, even when using a monomer (with a low Q value) that is likely to cause radical polymerization, by supplying the third monomer 51 that is least likely to cause radical polymerization last, the first and second monomers 31 and 41 that are more likely to cause radical polymerization in the pipe or on the pipe wall do not remain. As a result, the polymerization of the retained monomer can be reduced, the blockage of the common piping section 130 can be prevented, and the smooth supply of the first to third monomers 31, 41, and 51 to the monomer mixing tank 70 can be ensured. Since the monomer does not stay, there is no difference in the component concentration, etc. of the monomer mixture, and a predetermined monomer mixture can be obtained. As a result, in a polymerization reaction that requires strict control, a predetermined polymer can be obtained. Furthermore, the polymer deposited on the wall surface, etc. inside the pipe does not get mixed in during the production of another lot or another variety, and a predetermined polymer can be obtained.

[0044] Among polymerization apparatuses, there is a form in which each of a plurality of monomers is directly introduced into the polymerization tank 90 individually. In this form, a valve for controlling the flow rate is required for each monomer line of the plurality of monomers. On the other hand, in the present 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. Further, since the opening / closing control of one control valve 71 may be managed, the control itself is easy and can contribute to a more stable polymerization reaction and higher quality stability.

[0045] As described above, in the method for preparing a monomer mixture of the present embodiment, when each of the three-component monomers 31, 41, and 51 flows into a common pipe portion 130 having a plurality of inlets 131, 132, and 133 for flowing each of the three-component monomers 31, 41, and 51 into a single pipe 120 communicating with the monomer mixing tank 70 in the supply pipe 100 for each component, among the three-component monomers 31, 41, and 51, the third monomer 51 having the highest Q value is used as the last monomer fluid, and the distance Lc flowing through the common pipe portion 130 is made the longest among all monomer components. With this configuration, it is possible to prevent clogging of the common pipe portion 130 by preventing the retention of monomers in the common pipe portion 130, and a predetermined monomer mixture can be obtained.

[0046] Further, when each of the first to third monomers 31, 41, and 51 flows through the common pipe portion 130, they are made to flow in the order of increasing Q value (in the order of the first monomer 31, the second monomer 41, and the third monomer 51). With this configuration, by supplying the monomers to the monomer mixing tank 70 first from the monomers having a low Q value, that is, the monomers in which radical polymerization is likely to occur, it is possible to prevent more monomers in which radical polymerization is likely to occur from remaining in the common pipe portion 130. As a result, clogging of the common pipe portion 130 can be further prevented, and a higher quality monomer mixture can be obtained.

[0047] Also, when flowing the first to third monomers 31, 41, and 51 through the common piping section 130, the distance that the common piping section 130 is flowed through is increased in the order in which the Q value changes from a low value to a high value (in the order of the first monomer 31, the second monomer 41, and the third monomer 51). With this configuration, a monomer with a low Q value, that is, a monomer in which radical polymerization is likely to occur, is less likely to remain in the common piping section 130 due to the monomers that are less likely to undergo radical polymerization and are supplied later. As a result, blockage of the common piping section 130 can be further prevented, and a higher-quality monomer mixture can be obtained.

[0048] (Other operations of the monomer mixing facility 10 of the embodiment) FIG. 1C is an explanatory diagram for explaining other operations of the monomer mixing facility 10 according to the embodiment.

[0049] FIG. 1C shows a time chart indicating the opening and closing of the first to third valves 32, 42, and 52. In other operations, different from the above-described operations, first, the second valve 42 for the second monomer 41 with a Q value of Qb (Qa < Qb) is opened. When a predetermined specified amount of the second monomer 41 is supplied to the monomer mixing tank 70, the second valve 42 is closed, and the supply of the second monomer 41 is stopped. The distance that the second monomer 41 flows through the common piping section 130 is Lb.

[0050] Next, the first valve 32 for the first monomer 31 with the lowest Q value of Qa is opened. When a predetermined specified 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 that the first monomer 31 flows through the common piping section 130 is the shortest La (La < Lb).

[0051] Finally, the third valve 52 for the third monomer 51 with the highest Q value of Qc (Qa < Qb < Qc) is opened. When a predetermined specified amount of the third monomer 51 is supplied to the monomer mixing tank 70, the third valve 52 is closed, and the supply of the third monomer 51 is stopped. The distance that the third monomer 51 flows through the common piping section 130 is the longest Lc (La < Lb < Lc).

[0052] In other operations as well, when each of the three-component monomers 31, 41, and 51 flows through the common piping section 130, among the three-component monomers 31, 41, and 51, the third monomer 51 with the highest Q value is used as the last monomer fluid, and the distance Lc flowing through the common piping section 130 is made the longest among all monomer components. With this configuration, blockage of the common piping section 130 can be prevented by preventing the retention of monomers in the common piping section 130, and a predetermined monomer mixture can be obtained.

[0053] (Modification 1) FIG. 2A is a schematic configuration diagram showing a polymerization facility having the monomer mixing facility 11 according to Modification 1. Members common to the embodiment are denoted by the same reference numerals, and the description thereof is partially omitted.

[0054] The monomer mixing facility 11 of Modification 1 is different from the monomer mixing facility 10 of the embodiment in that a 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.

[0055] The monomer mixing facility 11 of Modification 1 has a solvent storage tank 60 for storing the 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). The solvent storage tank 60 includes a fourth pump 63 and a fourth pipe 65.

[0056] The monomer mixing equipment 11 has a pipe 220 communicating with the monomer mixing tank 70. The 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 a first pipe 35. The first monomer 31 flows from the first inlet 231 through the first pipe 35 into the 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 a second pipe 45. The second monomer 41 flows from the second inlet 232 through the second pipe 45 into the 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 a third pipe 55. The third monomer 51 flows from the third inlet 233 through the third pipe 55 into the pipe 220 and is supplied to the monomer mixing tank 70. The solvent storage tank 60 is connected to the fourth inlet 234 via a fourth pipe 65. The solvent 61 flows from the fourth inlet 234 through the fourth pipe 65 into the pipe 220 and is supplied to the monomer mixing tank 70.

[0057] The supply pipe 100 includes a common pipe portion 230 having first to fourth inlets 231, 232, 233, and 234 on the way of the pipe 220. As shown by the thick line in FIG. 2A, the common pipe portion 230 is defined as a pipe portion in the pipe 220 including at least the first to fourth inlets 231, 232, 233, and 234 from the tip 120a communicating with the monomer mixing tank 70. In the illustrated example, the common pipe portion 230 is a pipe portion in the range from the tip 120a to the fourth inlet 234.

[0058] 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.

[0059] Among the common piping section 230, between the first inlet 231 and the tip 120a, the first monomer 31, the second monomer 41, the third monomer 51, and the solvent 61 each flow. Among the common piping section 230, between the second inlet 232 and the first inlet 231, the second monomer 41, the third monomer 51, and the solvent 61 can each flow. Among the common piping section 230, between the third inlet 233 and the second inlet 232, the third monomer 51 and the solvent 61 can flow. Among the common piping section 230, between the fourth inlet 234 and the third inlet 233, only the solvent 61 can flow.

[0060] Similar to the embodiment, the first monomer 31, the second monomer 41, and the third monomer 51 have different Q values, and it is assumed that the Q value of the third monomer 51 is the highest, followed by the Q value of the second monomer 41, and the Q value of the first monomer 31 is the lowest. Therefore, the passage length between the third inlet 233 (corresponding to one inlet) for introducing the third monomer 51 with the highest Q value and the tip 120a of the common piping section 230 is longer than the passage lengths between the first and second inlets 231, 232 (corresponding to other inlets) for introducing the first and second monomers 31, 41 (corresponding to other monomers) and the tip 120a of the common piping section 230. In Modification 1, the passage length between the fourth inlet 234 for introducing the solvent 61 and the tip 120a of the common piping section 230 is longer than the passage length between the third inlet 233 for introducing the third monomer 51 with the highest Q value and the tip 120a of the common piping section 230.

[0061] The monomer mixing equipment 11 of Modification 1 has, in addition to the first to third valves 32, 42, 52 as switching parts, a switching part for the solvent that switches the supply and stop of the solvent 61 via the supply pipe 100. The switching part for the solvent is composed of, for example, a fourth valve 62 that is open / closed controlled. The fourth valve 62 is arranged in the fourth pipe 65. When the fourth valve 62 is opened, the solvent 61 in the solvent storage tank 60 flows through the common piping 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.

[0062] The monomer mixing equipment 11 of Modification Example 1 is configured such that the solvent 61 flows into the common piping section 230 last through the first to fourth valves 32, 42, 52, and 62. The fourth valve 62 is also composed of a control valve actuated by, for example, air pressure. The controller 150 outputs an opening / closing control signal to each of the first to fourth valves 32, 42, 52, and 62. The first to fourth valves 32, 42, 52, and 62 may be manually operated so that the solvent 61 flows into the common piping section 230 last.

[0063] (Operation of the monomer mixing equipment 11 of Modification Example 1) FIG. 2B is an explanatory diagram for explaining the operation of the monomer mixing equipment 11 according to Modification Example 1.

[0064] As shown in FIG. 2B, the Q values of the first to third monomers 31, 41, and 51 are Qa < Qb < Qc, similar to the embodiment, and the Q value of the third monomer 51 is the highest. Also, the distances that the first to third monomers 31, 41, and 51 flow through the common piping section 230 are La < Lb < Lc, similar to the embodiment, and the distance that the third monomer 51 flows through the common piping section 230 is the longest. The passage length between the fourth inlet 234 of the common piping section 230 and the tip 120a, that is, the distance that the solvent 61 flows through the common piping section 230, is Ld, which is longer than the distance Lc that the third monomer 51 flows through the common piping section 230 (Lc < Ld). Therefore, among the first to third monomers 31, 41, 51 and the solvent 61, the distance that the solvent 61 flows through the common piping section 230 is the longest.

[0065] When preparing a monomer mixture by supplying each of the first to third monomers 31, 41, 51 and the solvent 61 to the monomer mixing tank 70 via the supply piping 100, each of the first to third monomers 31, 41, 51 and the solvent 61 is caused to flow into the common piping section 230 of the supply piping 100 and supplied to the monomer mixing tank 70 as follows.

[0066] FIG. 2B shows a time chart indicating the opening and closing of the first to fourth valves 32, 42, 52, and 62. For the first to third monomers 31, 41, 51, as in the embodiment, the first monomer 31 having the lowest Q value Qa is first supplied, then the second monomer 41 having a Q value of Qb (Qa < Qb) is supplied, and then the third monomer 51 having the highest Q value Qc (Qa < Qb < Qc) is supplied. The distance flowing through the common piping section 230 is long in the order of the first monomer 31, the second monomer 41, and the third monomer 51 (La < Lb < Lc).

[0067] Finally, the fourth valve 62 for the solvent 61 is opened. The solvent 61 in the solvent storage tank 60 flows through the common piping section 230 from the fourth inlet 234 and is supplied to the monomer mixing tank 70. When a predetermined regulated amount of the solvent 61 is supplied to the monomer mixing tank 70, the fourth valve 62 is closed and the supply of the solvent 61 is stopped. The distance that the solvent 61 flows through the common piping section 230 is the longest Ld (La < Lb < Lc < Ld).

[0068] As described above, when flowing the first to third monomers 31, 41, 51 and the solvent 61 through the common piping section 230, the solvent 61 (referred to as "one fluid") among the third monomer 51 and the solvent 61 having the highest Q value is flowed last, and the distance Ld that the solvent 61 (the above "one fluid") flows through the common piping section 230 is made the longest. For the three-component monomers 31, 41, 51, as in the embodiment, the third monomer 51 having the highest Q value is used as the last monomer fluid, and the distance Lc that flows through the common piping section 230 is made the longest among all the monomer components.

[0069] Also, as in the embodiment, when flowing the first to third monomers 31, 41, 51 through the common piping section 230, they are flowed in the order of increasing Q value (in the order of the first monomer 31, the second monomer 41, and the third monomer 51).

[0070] Furthermore, similar to the embodiment, when flowing the first to third monomers 31, 41, and 51 through the common pipe portion 230, the distance that the common pipe portion 230 is flowed through is increased in the order in which the Q value changes from a low value to a high value (in the order of the first monomer 31, the second monomer 41, and the third monomer 51) (La < Lb < Lc).

[0071] Based on the Q value, the monomer component to be flowed last among the first to third monomers 31, 41, and 51 is determined, and after flowing the third monomer 51 with the highest Q value, the solvent 61 is flowed. Furthermore, the distance Ld that the solvent 61 flows through the common pipe portion 230 is made the longest. Similar to the embodiment, even when using a monomer (low Q value) in which radical polymerization is likely to occur, by supplying the solvent 61 last, the first to third monomers 31, 41, and 51 do not remain in the pipe or on the pipe wall. As a result, polymerization of the remaining monomer can be reduced, clogging of the common pipe portion 230 can be prevented, and smooth supply of the first to third monomers 31, 41, and 51 to the monomer mixing tank 70 can be ensured. Since the monomers do not remain, differences do not occur in the component concentration etc. of the monomer mixture, and a predetermined monomer mixture can be obtained. As a result, in a polymerization reaction that requires strict control, a predetermined polymer can be obtained. Furthermore, a situation where the polymer deposited on the wall surface etc. inside the pipe is mixed during the production of another lot or another product type does not occur, and a predetermined polymer can be obtained.

[0072] (Modification 2) FIG. 3A is a schematic configuration diagram showing a polymerization facility having the monomer mixing facility 12 according to Modification 2. Members common to the embodiment and Modification 1 are denoted by the same reference numerals, and the description thereof is partially omitted.

[0073] The monomer mixing facility 12 of Modification 2 differs from the monomer mixing facility 11 of Modification 1 in that the order of flowing the third monomer 51 with the highest Q value and the solvent 61, and the distance Lc that the third monomer 51 flows through the common pipe portion 330 is made the longest.

[0074] The monomer mixing equipment 12 of Modification Example 2 has a single pipe 320 communicating with the monomer mixing tank 70. The single 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 storage tank 60 is connected to the fourth inlet 334 via the fourth pipe 65.

[0075] The supply pipe 100 includes a common pipe portion 330 having first to fourth inlets 331, 332, 333, and 334 on the way of the single pipe 320. As shown by the thick line in FIG. 3A, the common pipe portion 330 is defined as a pipe portion in a range including at least the first to fourth inlets 331, 332, 333, and 334 of the single pipe 320 from the tip 120a communicating with the monomer mixing tank 70. In the illustrated example, the common pipe portion 330 is a pipe portion in the range from the tip 120a to the third inlet 333.

[0076] 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.

[0077] Between the first inlet 331 and the tip 120a in the common pipe portion 330, the first monomer 31, the second monomer 41, the third monomer 51, and the solvent 61 each flow. Between the second inlet 332 and the first inlet 331 in the common pipe portion 330, the second monomer 41, the third monomer 51, and the solvent 61 can each flow. Between the fourth inlet 334 and the second inlet 332 in the common pipe portion 330, the solvent 61 and the third monomer 51 can flow. Between the third inlet 333 and the fourth inlet 334 in the common pipe portion 330, only the third monomer 51 can flow.

[0078] Similar to Modification Example 1, the first monomer 31, the second monomer 41, and the third monomer 51 have different Q values, and it is assumed that the Q value of the third monomer 51 is the highest, followed by the Q value of the second monomer 41, and the Q value of the first monomer 31 is the lowest. Therefore, the passage length between the third inlet 333 (corresponding to one inlet) for introducing the third monomer 51 with the highest Q value and the tip 120a of the common piping section 330 is longer than the passage lengths between the first and second inlets 331 and 332 (corresponding to other inlets) for introducing the first and second monomers 31 and 41 (corresponding to other monomers) and the tip 120a of the common piping section 330. In Modification Example 2, the passage length between the third inlet 333 for introducing the third monomer 51 with the highest Q value and the tip 120a of the common piping section 330 is longer than the passage length between the fourth inlet 334 for introducing the solvent 61 and the tip 120a of the common piping section 330.

[0079] (Operation of the monomer mixing equipment 12 of Modification Example 2) FIG. 3B is an explanatory diagram for explaining the operation of the monomer mixing equipment 12 according to Modification Example 2.

[0080] As shown in FIG. 3B, the Q values of the first to third monomers 31, 41, and 51 are Qa < Qb < Qc, and the Q value of the third monomer 51 is the highest, similar to Modification Example 1. Also, the distances that the first to third monomers 31, 41, and 51 flow through the common piping section 330 are La < Lb < Lc, and the distance that the third monomer 51 flows through the common piping section 330 is the longest, similar to Modification Example 1. The passage length between the third inlet 333 and the tip 120a of the common piping section 330, that is, the distance that the third monomer 51 flows through the common piping section 330, is Lc, which is longer than the distance Ld that the solvent 61 flows through the common piping section 330 (Ld < Lc). Therefore, among the first to third monomers 31, 41, 51 and the solvent 61, the distance that the third monomer 51 flows through the common piping section 330 is the longest.

[0081] When preparing a monomer mixture by supplying each of the first to third monomers 31, 41, 51 and the solvent 61 to the monomer mixing tank 70 via the supply pipe 100, each of the first to third monomers 31, 41, 51 and the solvent 61 is flowed into the common pipe portion 330 of the supply pipe 100 as follows and supplied to the monomer mixing tank 70.

[0082] FIG. 3B shows a time chart indicating the opening and closing of the first to fourth valves 32, 42, 52, 62. For the first and second monomers 31, 41, similar to the first modification, the first monomer 31 with the lowest Q value Qa is supplied first, and then the second monomer 41 with a Q value of Qb (Qa < Qb) is supplied.

[0083] Next, the fourth valve 62 for the solvent 61 is opened. The solvent 61 in the solvent storage tank 60 flows from the fourth inlet 334 through the common pipe portion 330 and is supplied to the monomer mixing tank 70. When a predetermined specified amount of the solvent 61 is supplied to the monomer mixing tank 70, the fourth valve 62 is closed and the supply of the solvent 61 is stopped. The distance Ld that the solvent 61 flows through the common pipe portion 330 is longer than the distances that the first and second monomers 31, 41 flow through the common pipe portion 330 (La < Lb < Ld).

[0084] 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 from the third inlet 333 through the common pipe portion 330 and is supplied to the monomer mixing tank 70. When a predetermined specified amount of the third monomer 51 is supplied to the monomer mixing tank 70, the third valve 52 is closed and the supply of the third monomer 51 is stopped. The distance that the third monomer 51 flows through the common pipe portion 330 is the longest Lc (La < Lb < Ld < Lc).

[0085] As described above, when flowing the first to third monomers 31, 41, 51 and the solvent 61 through the common piping section 330, the third monomer 51 (referred to as "one fluid") among the third monomer 51 and the solvent 61 having the highest Q value is flowed last, and the distance Lc that the third monomer 51 (the above "one fluid") flows through the common piping section 330 is made the longest. Regarding the three-component monomers 31, 41, 51, similar to the embodiment and Modification 1, the third monomer 51 having the highest Q value is used as the last monomer fluid, and the distance Lc that flows through the common piping section 330 is made the longest among all monomer components.

[0086] Also, similar to the embodiment and Modification 1, when flowing the first to third monomers 31, 41, 51 through the common piping section 330, they are flowed in the order from the lowest Q value to the highest Q value (in the order of the first monomer 31, the second monomer 41, and the third monomer 51).

[0087] Furthermore, similar to the embodiment and Modification 1, when flowing the first to third monomers 31, 41, 51 through the common piping section 330, the distance that the common piping section 330 flows is increased in the order from the lowest Q value to the highest Q value (in the order of the first monomer 31, the second monomer 41, and the third monomer 51) (La < Lb < Lc).

[0088] Based on the Q value, the monomer component to be flowed last among the first to third monomers 31, 41, and 51 is determined, and after flowing the solvent 61, the third monomer 51 with the highest Q value is being flowed. Furthermore, the distance Lc that the third monomer 51 flows through the common piping section 330 is made the longest. Similar to the embodiment and Modification 1, even when using a monomer (low Q value) that is prone to radical polymerization, by supplying the third monomer 51 that is relatively less prone to radical polymerization last, the first and second monomers 31 and 41 that are more prone to radical polymerization do not remain in the piping or on the pipe wall. As a result, polymerization of the retained monomer can be reduced, clogging of the common piping section 330 can be prevented, and smooth supply of the first to third monomers 31, 41, and 51 to the monomer mixing tank 70 can be ensured. Since the monomers do not remain, there are no differences in the component concentrations, etc. of the monomer mixture liquid, and a predetermined monomer mixture liquid can be obtained. As a result, in a polymerization reaction that requires strict control, a predetermined polymer can be obtained. Furthermore, a situation where the polymer deposited on the wall surface, etc. inside the piping is mixed during the production of another lot or another product type does not occur, and a predetermined polymer can be obtained.

[0089] In Modification 2, the third monomer 51 is flowed after flowing the solvent 61. However, when the Q value of the third monomer 51 is sufficiently high and the resonance stability of the substituent is sufficiently high, clogging of the common piping section 330 can be prevented without hindrance, and a predetermined monomer mixture liquid can be obtained without hindrance.

[0090] (Other Modifications) Although the method for preparing a monomer mixture liquid for mixing the three-component monomers 31, 41, and 51 and the monomer mixing facilities 10, 11, and 12 have been described, the present invention is not limited to this case. The present invention can be applied to a method for preparing a monomer mixture liquid for mixing two-component monomers or for mixing four or more-component monomers, and monomer mixing facilities. When determining the supply order of the monomers and the distance flowing through the common piping section based on the Q value, it can also be applied to a method for preparing a monomer mixture liquid for mixing four or more-component monomers and monomer mixing facilities.

[0091] (Examples of Products, Monomers, and Solvents) The method for preparing the monomer mixture described above and the monomer mixing equipment embodying the same are not limited to preparing a monomer mixture for manufacturing a specific product, but can be applied to obtain a monomer mixture for manufacturing various products. Hereinafter, examples of products, monomers, and solvents will be described with examples.

[0092] [Examples of Products] Examples of products manufactured using such a monomer mixture include, for example, the Epocros (registered trademark) series manufactured by Nippon Shokubai Co., Ltd. (e.g., K-2010E, K-2020E, K-2030E, WS-0300, WS-500, WS-700, etc.).

[0093] [Types of Monomers] Examples of the types of monomers (monomers) include radically polymerizable monomers. 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 (monomers having an alicyclic structure), hydroxy group-containing (meth)acrylates, aromatic monomers, carboxy group-containing monomers, silicon atom-containing monomers, fluorine atom-containing monomers, nitrogen atom-containing monomers, epoxy group-containing monomers, etc. can be mentioned.

[0094] These monomers may be used alone or in combination of two or more.

[0095] (α-Olefin Compounds) Examples of α-olefins include, for example, 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, etc.

[0096] (Conjugated Diene Compounds) Examples of the conjugated diene compound 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.

[0097] (Halogen-containing α,β-unsaturated aliphatic hydrocarbon compound) Examples of the halogen-containing α,β-unsaturated aliphatic hydrocarbon compound include vinyl fluoride, vinyl chloride, vinyl bromide, vinylidene fluoride, vinylidene chloride, vinylidene bromide, tetrafluoroethylene, and the like.

[0098] (Vinyl ester monomer) Examples of the vinyl ester monomer include vinyl acetate, vinyl propionate, vinyl butyrate, vinyl caproate, vinyl caprylate, vinyl caprate, vinyl laurate, vinyl myristate, vinyl palmitate, vinyl stearate, vinyl cyclohexanecarboxylate, vinyl pivalate, vinyl octylate, vinyl monochloroacetate, divinyl adipate, vinyl crotonate, vinyl sorbate, vinyl benzoate, vinyl cinnamate, and the like.

[0099] (Vinyl ether monomer) Examples of the vinyl ether monomer 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, stearyl vinyl ether, and the like.

[0100] (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, 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, 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)acrylates], alkoxyalkyl (meth)acrylates [e.g., alkoxyalkyl (meth)acrylate (e.g., C of 2-methoxyethyl (meth)acrylate 1-12 alkoxy C 1-12 alkyl methacrylate, etc.), etc.].

[0101] (Monomer having an alicyclic structure) Examples of monomers having an alicyclic structure include monomers having an alicyclic structure (e.g., a cycloalkyl group having 4 to 20 carbon atoms, preferably a cycloalkyl group having 4 to 10 carbon atoms). Specific examples of monomers having an alicyclic structure include, for example, alicyclic (meth)acrylates [e.g., cycloalkyl (meth)acrylate (e.g., C of cyclohexyl (meth)acrylate 4-20 cycloalkyl (meth)acrylate, preferably C 4-10 cycloalkyl (meth)acrylate), cycloalkylalkyl (meth)acrylate (e.g., cyclohexylmethyl (meth)acrylate, cyclohexylethyl (meth)acrylate, cyclohexylpropyl (meth)acrylate, 4-methylcyclohexylmethyl (meth)acrylate, etc., C 4-10 cycloalkyl C 1-4Examples include alkyl (meth)acrylate), crosslinked cyclic (meth)acrylate (e.g., isobornyl (meth)acrylate, adamantyl (meth)acrylate, etc.).

[0102] Note that the monomer having an alicyclic structure may have a substituent (e.g., an alkyl group such as a methyl group, tert-butyl group, nitro group, nitrile group, alkoxyl group, acyl group, sulfone group, hydroxy group, halogen atom, etc.).

[0103] (Hydroxy group-containing (meth)acrylate) Examples of the hydroxy group-containing (meth)acrylate include hydroxyalkyl (meth)acrylate [e.g., hydroxy C such as 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, etc.], (meth)acrylate of a polyol having 3 or more hydroxy groups [e.g., tri- to hexahydroxy C such as glycerin mono(meth)acrylate, etc.] 2-10 alkyl (meth)acrylate, preferably C 2-6 alkyl (meth)acrylate, more preferably C 2-4 alkyl (meth)acrylate, etc.], (meth)acrylate of a polyol having 3 or more hydroxy groups [e.g., tri- to hexahydroxy C such as glycerin mono(meth)acrylate, etc.] 3-10 Examples of the (meth)acrylate of a polyol include those mentioned above.

[0104] (Aromatic monomer) Examples of the aromatic monomer include styrene-based monomers [e.g., styrene, α-alkylstyrene (e.g., α-methylstyrene, etc. of α-C 1-4 alkylstyrene), alkylstyrene (e.g., C such as vinyltoluene, etc.) 1-4 alkylstyrene), halostyrene (e.g., chlorostyrene, etc.), etc., alkoxystyrene (e.g., p-methoxystyrene, etc.)], aromatic (meth)acrylate [e.g., aryl (meth)acrylate (e.g., C such as phenyl (meth)acrylate, etc.) 6-10Aryl (meth)acrylate), aralkyl (meth)acrylate (e.g., C such as benzyl (meth)acrylate, phenethyl (meth)acrylate, etc.) 6-10 Aryl C 1-4 Alkyl (meth)acrylate), aryloxyalkyl methacrylate (e.g., C such as phenoxyethyl methacrylate, etc.) 6-10 Aryloxy C 1-4 Alkyl methacrylate), etc.] etc. can be mentioned.

[0105] (Carboxy group-containing monomer) Examples of the carboxy group-containing monomer include unsaturated monocarboxylic acids (e.g., aliphatic unsaturated monocarboxylic acids such as acrylic acid, methacrylic acid, crotonic acid, etc.), unsaturated dicarboxylic acids and their anhydrides (e.g., aliphatic unsaturated dicarboxylic acids such as maleic acid, fumaric acid, etc., maleic anhydride).

[0106] (Silicon atom-containing monomer) Examples of the silicon atom-containing monomer include vinyl group-containing silanes [e.g., halosilanes having a vinyl group (e.g., vinyl mono- to trichlorosilanes such as vinyltrichlorosilane), alkoxysilanes having a vinyl group [vinyl alkoxysilanes (e.g., vinyl mono- to trialkoxysilanes such as vinyltrimethoxysilane, vinyltriethoxysilane, preferably vinyl mono- to tri C 1-4 Alkoxysilane), vinylalkoxyalkoxysilanes (e.g., vinyl mono- to tri(C 1-4 Alkoxy C 1-4 Alkoxysilane), etc.) etc.], (meth)acryloyl group-containing silanes [e.g., alkoxysilanes having a (meth)acryloyl group (e.g., (meth)acryloyloxyalkyl mono- to trialkoxysilanes such as γ-(meth)acryloyloxypropyltrimethoxysilane, preferably (meth)acryloyloxy C 2-4 Alkyl mono- to tri C 1-4alkoxysilane), trialkylsiloxyalkyl (meth)acrylate (e.g., triC such as trimethylsiloxyethyl (meth)acrylate) 1-4 alkylsiloxyC 2-4 alkyl (meth)acrylate, etc.] etc. can be mentioned.

[0107] (fluorine atom-containing monomer) Examples of the fluorine atom-containing monomer include, for example, fluorine atom-containing acrylic monomers [e.g., fluoroalkyl (meth)acrylate (e.g., fluoroC such as trifluoroethyl (meth)acrylate, tetrafluoropropyl (meth)acrylate, octafluoropentyl (meth)acrylate) 1-10 alkyl (meth)acrylate, preferably fluoroC 2-6 alkyl (meth)acrylate, etc.] etc. can be mentioned.

[0108] (nitrogen atom-containing monomer) Examples of the nitrogen atom-containing monomer include, for example, (meth)acrylamide-based compounds {e.g., (meth)acrylamide, N-substituted (meth)acrylamide [e.g., N-alkyl (meth)acrylamide (e.g., N,N-dimethyl (meth)acrylamide such as N,N-diC 1-4 alkyl (meth)acrylamide; N,N-dimethylaminopropyl (meth)acrylamide, etc.] etc.}, nitrogen atom-containing (meth)acrylate compounds {e.g., N-substituted aminoalkyl (meth)acrylate [e.g., N,N-diC such as dimethylaminoethyl (meth)acrylate, diethylaminoethyl (meth)acrylate 1-4 alkylaminoC 2-4 alkyl (meth)acrylate]} etc., unsaturated nitrile compounds (e.g., acrylonitrile, methacrylonitrile, α-cyano (meth)acrylate, etc.) etc. can be mentioned.

[0109] (epoxy group-containing monomer) Examples of the epoxy group-containing monomer include epoxy group-containing (meth)acrylate [e.g., glycidyl (meth)acrylate, glycidyloxyalkyl (meth)acrylate (e.g., glycidyloxy C 2-4 alkyl (meth)acrylate such as 2-glycidyloxyethyl (meth)acrylate), allyl glycidyl ether, etc.

[0110] (Monomer having a functional group) In addition, as the radically polymerizable monomer, a monomer having a functional group can also be used. Examples of the functional group include a carbonyl group (or a carbonyl group-containing group such as a ketone group, an aldehyde group, an acyl group, etc.), a carboxy group, an acid anhydride group, an acid halide group, a carbonate group, an isocyanate group, an oxazoline group, an oxazolidine group, a hydrazino group, an epoxy group, an amino group, a hydroxy group, a mercapto group, etc.

[0111] The monomer having a functional group may have these functional groups alone or in combination of two or more.

[0112] Specific examples of the monomer having a functional group include a carbonyl group-containing monomer, a carboxy group-containing monomer, an oxazoline group-containing monomer, a hydroxy group-containing monomer, etc.

[0113] Examples of the carbonyl group-containing monomer include unsaturated aldehyde [e.g., alkenal (e.g., C such as acrolein, methacrolein 3-10(alkenal), (meth)acryloxyalkyl alkenal (e.g., acryloxyalkyl propenal, methacryloxyalkyl propenal), formylstyrene, etc.], unsaturated ketone [e.g., alkenone (e.g., methyl vinyl ketone, ethyl vinyl ketone, vinyl butyl ketone, etc.), (meth)acryloyloxyalkanone (e.g., acetonyl acrylate, acetonyl methacrylate, etc.), N-(meth)acryloylaminoalkanone (e.g., diacetone acrylamide, diacetone methacrylamide, etc.), alkanediol (meth)acrylate acetyl acetate (e.g., 2-hydroxypropyl acrylate acetyl acetate, 2-hydroxypropyl methacrylate acetyl acetate, butanediol-1,4-acrylate acetyl acetate, etc. of C 2-6 alkanediol (meth)acrylate acetyl acetate), acetoacetoxyalkyl (meth)acrylate (e.g., 2-(acetoacetoxy)ethyl acrylate, 2-(acetoacetoxy)ethyl methacrylate), etc.], etc. can be mentioned.

[0114] Examples of the carboxy group-containing monomer include the monomers exemplified above, for example, unsaturated monocarboxylic acids (e.g., aliphatic unsaturated monocarboxylic acids such as acrylic acid, methacrylic acid, crotonic acid, etc.), unsaturated dicarboxylic acids (e.g., aliphatic unsaturated monocarboxylic acids such as maleic acid, fumaric acid, etc.).

[0115] Examples of the oxazoline group-containing monomer include, for example, alkenyloxazoline (e.g., C of 2-vinyl-2-oxazoline, 2-isopropenyl-2-oxazoline, etc. 2-6 alkenyloxazoline, preferably vinyl or isopropenyl oxazoline), alkenyl-alkyl oxazoline (e.g., C of 2-vinyl-4-methyl-2-oxazoline, 2-vinyl-5-methyl-2-oxazoline, 2-isopropenyl-4-methyl-2-oxazoline, 2-isopropenyl-5-ethyl-2-oxazoline, etc. 2-6 alkenyl-C 1-10Alkyloxazoline, preferably vinyl or isopropenyl-C 1-4 Examples include alkyloxazoline and the like).

[0116] Examples of the hydroxy group-containing monomer include the monomers exemplified above (for example, hydroxy group-containing (meth)acrylate).

[0117] The monomers having the above functional groups can be used alone or in combination of two or more.

[0118] [Type of solvent] The solvent is not particularly limited. For example, aromatic solvents such as toluene and xylene; alcohol solvents such as methanol, ethanol, isopropyl alcohol, and n-butyl alcohol; ether solvents such as propylene glycol methyl ether, dipropylene glycol methyl ether, ethyl 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; and amide solvents such as dimethylformamide. Further, aqueous solvents such as water and solvents containing water [mixed solvents of water and alcohol (such as C alcohols such as methanol and ethanol)] can also be used. 1-4 An aqueous solvent such as a mixed solvent of water and alcohol (such as methanol and ethanol) can also be used.

[0119] These solvents can be used alone or in combination of two or more.

Explanation of symbols

[0120] 10, 11, 12 Monomer mixing equipment 30 First monomer storage tank 31 First monomer 32 Switching section (first valve) 33 First pump 35 First pipe 40 Second monomer storage tank 41 Second monomer 42 Switching section (second valve), 43 Second pump, 45 Second pipe, 50 Third monomer storage tank, 51 Third monomer, 52 Switching section (third valve), 53 Third pump, 55 Third pipe, 60 Solvent storage tank, 61 Solvent, 62 Solvent switching section (fourth valve), 63 Fourth pump, 65 Fourth pipe, 70 Monomer mixing tank, 80 Polymerization initiator tank, 90 Polymerization tank, 100 Supply pipe, 120, 220, 320 One pipe, 120a Tip of the common pipe section, 130, 230, 330 Common pipe section, 131, 231, 331 First inlet, 132, 232, 332 Second inlet, 133, 233, 333 Third inlet, 150 Controller, 234, 334 Fourth inlet.

Claims

1. A method for preparing a monomer mixture solution, comprising supplying each of two or more monomers to a monomer mixing tank through a supply pipe to prepare a monomer mixture solution, When flowing each of the two or more monomers through a common pipe portion having a plurality of inlets for flowing each of the two or more monomers into the monomer mixing tank through one pipe communicating with the monomer mixing tank, the monomers are flowed in order such that after flowing one component of the monomer is finished, the other component of the monomer starts to flow, and as the last monomer fluid to flow the monomer having the highest Q value among the two or more monomers, and flowing through the longest distance in the common pipe portion among all monomer components, a method for preparing a monomer mixture solution.

2. When flowing each of three or more monomers through the common pipe portion, flowing in the order from a lower Q value to a higher Q value such that after flowing the monomer having a lower Q value is finished, the monomer having a higher Q value starts to flow, the method for preparing a monomer mixture solution according to claim 1.

3. When flowing each of three or more monomers through the common pipe portion, flowing through a longer distance in the common pipe portion in the order from a lower Q value to a higher Q value, the method for preparing a monomer mixture solution according to claim 1 or claim 2.

4. A monomer mixing facility for mixing two or more monomers to obtain a monomer mixture solution, A plurality of monomer storage tanks for storing each of 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, And a switching unit for switching the supply and supply stop of each of the two or more monomers through the supply pipe. The supply pipe includes a common pipe section having inlets for flowing each of the two or more monomers into the common pipe section at each component along a path of one pipe communicating with the monomer mixing tank, and a path length between one inlet for flowing the monomer with the highest Q value and the tip of the common pipe section communicating with the monomer mixing tank is longer than a path length between another inlet for flowing another monomer and the tip of the common pipe section, A monomer mixing facility that sequentially flows through the common pipe section so that, after flowing one component of the monomer has finished, another component of the monomer begins to flow, and that finally flows the monomer with the highest Q value from the one inlet into the common pipe section by the switching section.

Images