JP2008050470A - Method for producing surface-coating agent, surface-coating agent and apparatus for producing surface-coating agent - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a surface-coating agent having excellent durability and applicable to both a glass surface and a coating film without giving glaring feeling even by applying to a glass surface, and provide a method for producing the surface-coating agent and a production apparatus for the surface-coating agent. <P>SOLUTION: The method for producing a surface-coating agent comprises a main agent preparation step to heat a mixture of an aqueous coating agent and an oily coating agent containing 0-1 wt.% wax in the mixture, and evaporate a prescribed amount of a low-boiling component containing water and a hydrocarbon solvent and/or petroleum solvent from the mixture to obtain the main agent, a cooling step to cool the main agent prepared by the main agent preparation step, and a fixing agent addition step to add and mix a fixing agent to the main agent cooled by the cooling step. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a surface coating agent for protecting the surface of automobiles, aircraft and ships, plastics, rubber products and the like from rainwater and contaminants, a method for producing the same, and a device for producing the same. The present invention relates to a surface coating agent that can be used for both films, a manufacturing method thereof, and a manufacturing apparatus thereof. In the present invention, the aqueous coating agent refers to a protective agent such as a wax agent, a coating agent, a polishing agent, a water repellent agent, a surface coating agent or the like using water as a solvent or a dispersion medium. In addition, the oil-based coating agent is a wax agent, a coating agent, a polishing agent, a water repellent agent, a surface coating agent, etc. using a hydrocarbon solvent and / or a petroleum solvent as a solvent or a dispersion medium, etc. Say no protective agent.

  Many wax agents and coating agents used for protecting painted surfaces of vehicles have been developed and sold. The wax agent is a paint surface polishing agent mainly composed of waxes such as carnauba wax and montan wax and silicones such as silicone oil. Yes. In addition, aqueous liquid waxes are also commercially available.

  Some waxes and coating agents have a water repellency improved by blending a silicone resin and a fluororesin to protect the coating film from rainwater and the like. However, when a wax or a coating agent blended with a silicone resin or the like is used, it has been pointed out that the moisture adhering to the formed film remains as spherical water droplets, and the entrained dirt remains. For this reason, as a solution to this problem, a protective water repellent for coating film surfaces has been developed in which paraffin wax having a melting point of 40 ° C. or higher, fluorinated alkyl ester oligomer and silicone oil are mixed and dissolved in a solvent. (For example, refer to Patent Document 1).

Water repellents for automobile glass have also been developed. Conventional water repellents for glass composed of alkylpolysiloxanes, inorganic acids, and aqueous solvents cause raindrops to adhere to the glass surface when driving at low speeds, causing poor visibility. A water repellent for glass in which at least one of an alkyl group-containing polyorganosiloxane having a specific structure, a fluororesin, and a paraffin wax is added to a water repellent composition comprising a polysiloxane, an acidity adjusting agent, and an aqueous solvent for dissolving them. It has been proposed (for example, see Patent Document 2).
Japanese Patent No. 3262536 WO98 / 59012

  Conventional waxes and coating agents including the techniques described in Patent Document 1 and Patent Document 2 are used in accordance with their properties. Generally, the wax and coating agent for the coating film surface use waxes or petroleum-based solvents, and when this is applied to the glass surface, a feeling of glare occurs on the glass surface. For this reason, most of the wax and coating agent for the coating surface cannot be used on the glass surface. Among the waxes and coating agents, water-based waxes for both coating and glass are also commercially available, but the period during which the effect can be maintained is short. From these things, development of the coating agent which can be used for both a coating film and glass and can maintain an effect for a long period of time is awaited. Furthermore, it is needless to say that these coating agents can be used for members other than coating films and glass, such as plastics and rubber products, and can protect them from contaminants.

  An object of the present invention is to provide a surface coating agent that can be used on both a glass surface and a coating film without giving glare even when used on a glass surface, a method for producing the surface coating agent, and a surface coating. An agent manufacturing apparatus is provided.

  As a result of intensive studies to solve the above problems, the present inventors have found that a surface coating agent exhibiting desired characteristics can be obtained by the production method as described below, and have completed the present invention. . That is, the method for producing a surface coating agent of the present invention is a mixture of an aqueous coating agent and an oily coating agent, and a mixture having a wax content of 0 to 1% by weight is heated to be contained in the mixture. A main agent adjusting step for obtaining a main agent by evaporating a predetermined amount of low-boiling components containing water and hydrocarbon solvents and / or petroleum solvents; a cooling step for cooling the main agent obtained in the main agent adjusting step; And a fixing agent adding step of adding and mixing a fixing agent to the main agent.

  In addition to the above-described structure, the method for producing a surface coating agent of the present invention includes at least a fluororesin, silicone resin, silicone oil, inorganic powder, hydrocarbon-based mixture after mixing the aqueous coating agent and the oily coating agent. It contains a solvent and / or petroleum solvent, a surfactant and water.

  Further, in the method for producing a surface coating agent of the present invention, in addition to the above configuration, the mixture after mixing the aqueous coating agent and the oily coating agent has a fluororesin of 25 to 30% by weight and a silicone resin of 5 to 12% by weight. %, Silicone oil 1-5%, inorganic powder 30-37%, hydrocarbon solvent and / or petroleum solvent 15-30%, surfactant and water 3-10%, wax Is 0 to 1% by weight, and the amount of the low boiling point component containing water and hydrocarbon solvent and / or petroleum solvent evaporated in the main agent preparation step is 20 to 35% by weight of the mixture weight. And

  In addition to the above structure, the method for producing a surface coating agent of the present invention is characterized in that the fixing agent contains at least one of organosilane, alkoxysilane, alkoxysiloxane, and silicone emulsion.

  In addition to the above-described structure, the method for producing a surface coating agent of the present invention further includes at least one auxiliary agent selected from a salt damage inhibitor, an antistatic agent, and an ultraviolet inhibitor, and the auxiliary agent is a hydrocarbon-based agent. When a solvent and / or petroleum solvent is contained, the auxiliary agent is added to and mixed with the mixture of the aqueous coating agent and the oily coating agent, and the auxiliary agent does not contain a hydrocarbon solvent and / or a petroleum solvent. In some cases, the auxiliary agent is added in the fixing agent adding step.

  The present invention also provides a surface coating agent obtained by any one of the methods described above.

  The apparatus for producing a surface coating agent of the present invention comprises a raw material adjusting device for stirring and mixing the water-based coating agent and the oil-based coating agent, a mixture of the water-based coating agent and the oil-based coating agent, and water and water contained in the mixture. A main agent adjusting device for obtaining a main agent by evaporating a predetermined amount of a low boiling point component containing a hydrocarbon solvent and / or a petroleum solvent, water, hydrocarbon solvent and / or petroleum solvent discharged from the main agent adjusting device. A low boiling point component recovery device for recovering the low boiling point component, a cooling device for cooling the main agent discharged from the main agent adjusting device, a fixing agent adding device for adding and mixing the fixing agent to the cooled main agent, and the low Recover the cleaning liquid that has washed the main agent adjusting apparatus using low boiling point components including water and hydrocarbon-based solvent and / or petroleum-based solvent recovered by the boiling-point component recovery apparatus. A cleaning liquid recovery device that separates a low-boiling component containing a hydrofluoric solvent and / or a petroleum solvent and a residue, and a low-boiling component containing water and a hydrocarbon solvent and / or a petroleum solvent separated by the cleaning liquid recovery device Including a low-boiling component return line for returning the residue to the low-boiling component recovery device, and a residue transport line for sending the residue separated by the cleaning liquid recovery device to the raw material adjusting device.

  The surface coating agent obtained by the method for producing a surface coating agent of the present invention can be used on both the glass surface and the coating film without giving a feeling of glaring even when used on the glass surface, and is excellent in durability.

  The surface coating agent of the present invention can be produced by the following production method. As a first step, an aqueous coating agent and an oily coating agent are mixed with stirring. As the second step, these mixtures are heated to evaporate a predetermined amount of low-boiling components including water and hydrocarbon solvents and / or petroleum solvents contained in the mixture. The first and second steps are steps for adjusting the main agent, whereby the main agent can be obtained. Further, as the third step, the main agent obtained in the second step is cooled. Thereafter, as a fourth step, the surface coating agent of the present invention can be obtained by adding and mixing a predetermined amount of the fixing agent to the main agent whose temperature has been lowered. The first step and the second step do not necessarily need to be clearly distinguished, and the water-based coating agent and the oil-based coating agent are simultaneously heated while being stirred and mixed, and a predetermined amount of water and hydrocarbon solvent and / or petroleum. Low boiling point components including the system solvent may be evaporated. The surface coating agent of the present invention can be obtained by deleting the second and third steps and adding a fixing agent to the mixture of the oil-based coating agent and the aqueous coating agent obtained in the first step. When applied to a glass surface, some glare remains.

  As the oil-based coating agent that can be used for the production of the surface coating agent of the present invention, it is possible to use a conventional oil-based coating agent, but it is preferable that the content of wax is small, and no wax is contained. It is more preferable. The same applies to the aqueous coating agent. When the wax is contained, dust in the air tends to adhere after the surface coating agent of the present invention is applied to the coating film. Here, the wax means natural wax such as carnauba wax and montan wax, synthetic wax, and a mixture thereof. As described above, the coating agent referred to here includes a wax agent, a coating agent, a polishing agent, a water repellent agent, a surface coating agent, and the like.

  As the oil-based coating agent, an oil-based coating agent containing a fluororesin, silicone resin, silicone oil, inorganic powder, hydrocarbon solvent and / or petroleum solvent can be used. In particular, inorganic powder containing zirconia can be preferably used. Addition of zirconia increases the strength of the coating. As the aqueous coating agent, an aqueous coating agent containing a fluororesin, a silicone resin, an inorganic powder, a surfactant, and water can be used. The inorganic powder mentioned here includes ceramics. In addition, the oil-based coating agent does not necessarily need to use one kind of oil-based coating agent, and it is needless to say that a mixture of several kinds of oil-based coating agents may be used. The same applies to the aqueous coating agent.

  The composition ratio of the mixture after the first step is preferably the ratio shown in Table 1. Furthermore, in the first step, it is more preferable to add and mix organic powder. The organic powder is preferably a fine fluororesin powder and Teflon (registered trademark) powder, and the addition amount is 0.1 to 0.3 with respect to the mixture 100 of the oil-based coating agent and the aqueous coating agent in a weight ratio. It is preferable that

  The removal amount of the low-boiling components containing water and hydrocarbon solvent and / or petroleum solvent in the second step is preferably 20 to 35% by weight of the mixture, more preferably 30 to 35% by weight. preferable. By adjusting in this way, the surface coating agent of the present invention becomes creamy and does not have a high viscosity and is easy to handle. Furthermore, by adjusting to this range, phase separation does not occur even when stored for a long time. The heating operation in the second step of evaporating the low-boiling components containing water and hydrocarbon solvent and / or petroleum solvent contained in the mixture may be under atmospheric pressure or under reduced pressure.

  The method for cooling the main agent in the third step is not particularly limited and can be performed using a heat exchanger or the like. The cooling temperature is preferably 50 ° C. or lower.

  An organosilane can be used for the fixing agent used in the fourth step. In addition, alkoxysilanes, alkoxysiloxanes, silicone emulsions, and mixtures thereof can also be used. The addition ratio of the fixing agent to the main agent is preferably 0.5 to 1.5 with respect to the main agent 100 in terms of weight ratio, and more preferably 1.0 to 1.2 with respect to the main agent 100.

  Further, the surface coating agent of the present invention may further contain known salt damage prevention agents, antistatic agents, and ultraviolet ray prevention agents as auxiliary agents. These may be any one kind, two kinds or three kinds. The operation of adding the auxiliary agent can be basically performed in the fourth step. However, when the auxiliary agent contains a hydrocarbon solvent and / or a petroleum solvent, it is added and mixed in the first step. In the second step, the hydrocarbon solvent and / or petroleum solvent contained in the auxiliary agent is removed. Thus, even when the surface coating agent of the present invention is applied to the glass surface, no glaring sensation is produced. It is preferable that the addition ratio of an auxiliary agent is 0.2-2.0 with respect to the main ingredient 100 by weight ratio.

  The method of using the surface coating agent of the present invention is basically the same as the conventional oil-based coating agent or aqueous coating agent. Since the surface coating agent of the present invention has creamy properties, the surface coating agent is applied to the object using a cloth, sponge, etc., as in the case of conventional oil-based coating agents or aqueous coating agents, and the surface after application is What is necessary is just to wipe off the surplus surface coating agent in the state which became a little white. Furthermore, when applying the surface coating agent, if a small water droplet is adhered to the surface of the object by spraying or the like and applied in this state, the amount of surface coating agent used is suppressed and the application of the surface coating agent is suppressed. It becomes easier. In addition, the surface coating agent of the present invention can be overcoated. In particular, when the surface coating agent is applied once and then applied for a second time after the time has elapsed, the film thickness of the surface coating agent is increased. In addition, the coating film itself becomes hard and the effects of antifouling property, rust prevention property, water repellency and the like can be maintained for a longer period of time. Similarly, if the third application is performed after the second application, the effect can be maintained for a long time.

  The surface coating agent of the present invention as described above can be used for coating films of automobiles, aircraft and ships, glass, plastics, rubber products and the like, and protects these surfaces from rainwater and pollutants. The surface coating agent of the present invention was applied to a coating film, etc., and the antifouling property, rust prevention property, and water repellency durability were examined, and it was confirmed that these performances hardly changed even after half a year or more. . Further, since the surface coating agent of the present invention has a low content of low-boiling components such as hydrocarbon solvents and / or petroleum solvents, it does not give a feeling of glare even when applied to a glass surface. Further, since it does not contain wax or is contained in a very small amount, even if it passes for a long period of time, dust in the air does not adhere and the coating surface is not soiled.

  In order to industrially produce the surface coating agent of the present invention, the production equipment shown in FIG. 1 can be used. FIG. 1 is a process flow diagram showing a schematic configuration of a surface coating agent continuous production facility 1 as one embodiment of the present invention. The surface coating agent continuous production apparatus 1 according to the present invention is composed mainly of a raw material adjusting device 2, a main agent adjusting device 3, a fixing agent adding device 4, a low boiling point component recovering device 5, and a cleaning liquid recovering device 6. The raw material adjusting device 2 has a raw material adjusting tank 11 and receives and stirs and mixes the oily coating agent and the aqueous coating agent supplied from the oily coating agent supply device 12 and the aqueous coating agent supply device 13. The oil-based coating agent supply device 12 includes a storage tank 14 with a stirrer and a fixed amount supply pump 15, and the aqueous coating agent supply device 13 similarly includes a storage tank 16 with a stirrer and a constant amount supply pump 17. Each coating agent is quantitatively supplied to the raw material adjusting tank 11. The mixture stirred and mixed in the raw material adjusting tank 11 is quantitatively supplied to the main agent adjusting device 3 by the raw material supply pump 18 connected to the raw material adjusting tank 11. A heat exchanger 19 is provided at the discharge portion of the raw material supply pump 18, and the mixture discharged from the raw material adjustment tank 11 exchanges heat with the main agent discharged from the main agent adjustment tank 20 and is preheated to the main agent adjustment tank 20. Sent. In addition, although the oil-based coating agent supply device 12 and the water-based coating agent supply device 13 each show one case here, it is possible to increase the number according to the types of the oil-based coating agent and the water-based coating agent. Of course.

  The raw material supply pump 18 for feeding the mixture to the main agent adjustment tank 20 is not particularly limited as long as it is a pump capable of quantitative supply, and a pump suitable for the viscosity of the mixture can be used. Examples of pumps that can be easily supplied in a constant amount include piston pumps, diaphragm pumps, gear pumps, plunger pumps, and screw pumps, and these can be suitably used. The heat exchanger 19 provided in the discharge part of the raw material supply pump 18 is not limited to a specific type as long as it is a partition wall type heat exchanger, and a multi-tube heat exchanger or the like can be used. Here, an example is shown in which a heat exchanger is used to directly heat-exchange the mixture and the main agent, but heat exchange may be performed with another heat medium interposed.

  The main agent adjusting device 3 has a main agent adjusting tank 20 composed of an external heating type stirring tank. The main agent adjusting tank 20 heats the mixture sent from the raw material adjusting apparatus 2 and evaporates low-boiling components including water and hydrocarbon solvents and / or petroleum solvents contained in the mixture. Since the external heating means of the main agent adjustment tank 20 is not limited to a specific method, it may be heated by a heater. Further, a jacket may be provided in the stirring tank, and a heated heat medium may be circulated and heated. Further, instead of the external heating method, a heating coil and a heater may be provided inside the stirring tank.

  The main agent adjustment tank 20 includes a gas line 21 connected to the low boiling point component recovery device 5 at the top of the tank. As a result, the low boiling point component containing water and hydrocarbon solvent and / or petroleum solvent heated in the main agent adjusting tank 20 is led to the low boiling point component recovery device 5 through the gas line 21. A mixture obtained by removing a part of the low-boiling components including water and hydrocarbon solvent and / or petroleum solvent in the main agent adjusting tank 20, that is, the main agent is sent to the heat exchanger 19 via the main agent feed pump 22, After the temperature is lowered by heat exchange with the mixture, the mixture is sent to the cooler 23. The cooler 23 is for cooling the main agent, and a partition wall type exchanger can be used. The main agent whose temperature has been lowered to 50 ° C. or lower is sent to the fixing agent adding device 4. The main agent liquid feed pump 22 is not particularly limited as long as it is a pump that can supply a fixed amount similarly to the raw material supply pump 18, and a pump suitable for the viscosity of the main agent can be used. Examples of pumps that can be easily supplied in a constant amount include piston pumps, diaphragm pumps, gear pumps, plunger pumps, and screw pumps, and these can be suitably used.

  The fixing agent adding device 4 includes a stirring tank 25, a surface coating agent dispensing pump 26 for feeding the surface coating agent to the product storage tank, and a fixed agent constant supply device 27. The base agent and the fixing agent sent from the fixing agent quantitative supply device 27 are mixed by stirring to produce a surface coating agent. Since the surface coating agent has a cream-like property, the surface coating agent dispensing pump 26 is preferably a pump capable of feeding a fluid having a high viscosity. The sticking agent quantitative supply device 27 includes a storage tank 28 for storing the sticking agent and a fixed quantity supply pump 29 for feeding the sticking agent in a fixed amount, and supplies the sticking agent to the stirring tank 25 in a fixed amount. The type of the metering supply pump 29 for supplying the fixing agent in a fixed amount is not particularly limited, but a plunger pump can be suitably used because the viscosity of the fixing agent is relatively low and the supply amount is small.

  The low boiling point component recovery device 5 cools and condenses the low boiling point component containing water and hydrocarbon solvent and / or petroleum solvent discharged from the main agent adjustment tank 20 and recovers them. The recovered low-boiling components including water and hydrocarbon-based solvent and / or petroleum-based solvent are stored in the storage tank 32 and are sent to the main agent adjustment tank 20 by the low-boiling component supply pump 33 as necessary. Used for 20 washings. Further, the low-boiling component containing water and hydrocarbon solvent and / or petroleum solvent used for cleaning the main agent adjusting tank 20 is low in the cleaning liquid recovery device 6 including water and hydrocarbon solvent and / or petroleum solvent. The low boiling point component which is separated into the boiling point component and the residue and contains water and hydrocarbon solvent and / or petroleum solvent is returned to the storage tank 32 through the low boiling point component return line 35. For this reason, on the upstream side of the cooler 31, a three-way valve 36 for switching between the gas line 21 communicating with the main agent adjusting tank 20 and the low boiling point component returning line 35 communicating with the cleaning liquid recovery tank 41 is provided. .

  When the cleaning liquid recovery device 6 cleans the main agent adjustment tank 20 with the recovered water and the low-boiling component containing the hydrocarbon-based solvent and / or the petroleum-based solvent, the cleaning liquid discharged is the water, the hydrocarbon-based solvent and / or the petroleum. An apparatus for separating a low-boiling-point component containing a system solvent and a residue, a cleaning liquid recovery tank 41 for heating the cleaning liquid, water discharged from the cleaning liquid recovery tank 41, a hydrocarbon-based solvent and / or a petroleum-based solvent A low-boiling component return line 35 for sending the low-boiling component contained therein to the low-boiling component recovery device 5, a liquid feeding device 42 for feeding the residue to the raw material adjusting tank 11, and a residue transport line 43 are provided. A three-way valve 38 is provided at the outlet of the main agent adjusting tank 20, and by switching the three-way valve 38, the main agent can be sent to the fixing agent adding device 4 or the cleaning liquid can be sent to the cleaning liquid collecting device 6. The cleaning liquid recovery tank 41 is an external heating type stirring tank. The liquid feeding device 42 for feeding the residue to the raw material adjusting tank 11 is preferably a screw pump or a gear pump because the viscosity of the residue is high.

  Since the residue recovered in the cleaning liquid recovery tank 41 has almost the same composition as the main agent, the surface coating agent continuous production apparatus 1 shown in the present embodiment recovers the residue and uses it as a part of the raw material. Thus, the surface coating agent can be efficiently produced without generating waste. Moreover, since the low-boiling-point component containing the collect | recovered water, a hydrocarbon-type solvent, and / or a petroleum-type solvent is used for the washing | cleaning of the main ingredient adjustment tank 20, it is not necessary to prepare the solvent for washing | cleaning newly. Further, since no separate cleaning solvent is used, there is no concern about contamination with the cleaning solvent.

  It goes without saying that the continuous production apparatus for a surface coating agent shown in the present embodiment is an embodiment of the continuous production apparatus and is not limited to this embodiment. Also in the present embodiment, it is possible to make changes without departing from the spirit of the invention. For example, instead of the three-way valves 36 and 38, a switching valve may be provided in the middle of the line. In this embodiment, although the example which does not add an auxiliary agent was shown, when adding an auxiliary agent, what is necessary is just to add an auxiliary agent addition apparatus. The auxiliary agent addition device can be configured to include a storage tank for storing the auxiliary agent, a pump for quantitatively supplying the auxiliary agent, and a pipe line connecting these with the raw material adjusting tank 11 or the agitation tank 25. In the present embodiment, a continuous surface coating agent manufacturing apparatus is shown, but it goes without saying that a batch type manufacturing apparatus may be used for manufacturing the surface coating agent.

Example 1
The surface coating agent was prepared by the following procedure. Commercially available oily coating agent, aqueous coating agent and organic powder were mixed in the proportions shown in Table 2. Further, 4.4 g of a salt damage inhibitor was added and mixed. 983.2 g of this mixture was heated with stirring under atmospheric pressure to obtain 657 g of the main agent. After cooling the main agent to about 40 ° C., 1.8 g of an antistatic agent, which is an auxiliary agent, 2.3 g of an anti-ultraviolet agent and 0.9 g of a silicone emulsion, 0.4 g of alkoxysilane and alkoxysiloxane, and 2. 6.6 g of a fixing agent containing 2 g was added and mixed to obtain a surface coating agent.

  The performance of this surface coating agent was evaluated as follows. After the glass surface was washed and dried, the surface coating agent produced in Example 1 was applied to the glass surface, and the surplus surface coating agent was wiped off in a state where the surface was slightly white. This procedure is the same as a coating method such as a coating agent generally used conventionally. As a comparative example, a commercially available wax and coating agent were applied to the glass surface in the same manner. This glass was placed at an angle of 90, 100, 110, 120, and 130 degrees with respect to the horizontal plane, water drops were dropped on the glass surface, and the time for the water drops to flow down 50 cm was measured. The results are shown in Table 3. As shown in Table 3, the surface coating agent of the present invention has a faster water drop flow rate and excellent water repellency compared to a commercially available wax, a case where a coating agent is applied, and a case where a coating agent is not applied. It was. Moreover, even if the surface coating agent was applied to the glass surface, there was no glaring feeling.

  The surface coating agent prepared in Example 1 was applied to various types of dirt and scratches shown in Table 4 attached to the car body, and the degree of dirt removal and the degree of wound repair were visually observed. The surface coating agent was applied by impregnating the surface coating agent into a sponge and rubbing it on the soiled portion. As a result, it showed excellent removal performance against the stains shown in Table 4. Moreover, sufficient repair effect was seen for small scratches.

It is a process flow figure showing a schematic structure of continuous manufacture equipment 1 of a surface coating agent as one embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Continuous production equipment of surface coating agent 2 Raw material adjustment apparatus 3 Main agent adjustment apparatus 4 Adhesive agent addition apparatus 5 Low boiling point component recovery apparatus 6 Cleaning liquid recovery apparatus

Claims (7)

A mixture of an aqueous coating agent and an oil-based coating agent, wherein the mixture containing 0 to 1% by weight of wax contained in the mixture is heated, and water, hydrocarbon solvent and / or petroleum solvent contained in the mixture A main agent adjustment step of obtaining a main agent by evaporating a low-boiling component containing a predetermined amount;
A cooling step for cooling the main agent obtained in the main agent adjusting step;
A fixing agent addition step of adding and mixing a fixing agent to the main agent after cooling;
A method for producing a surface coating agent comprising:   The mixture after mixing the water-based coating agent and the oil-based coating agent contains at least a fluorine resin, a silicone resin, a silicone oil, an inorganic powder, a hydrocarbon solvent and / or a petroleum solvent, a surfactant and water. The method for producing a surface coating agent according to claim 1. The mixture after mixing the aqueous coating agent and the oily coating agent is 25 to 30% by weight of fluororesin, 5 to 12% by weight of silicone resin, 1 to 5% by weight of silicone oil, and 30 to 37 inorganic powder. % By weight, hydrocarbon solvent and / or petroleum solvent 15-30% by weight, surfactant and water 3-10% by weight, wax 0-1% by weight,
The amount of low boiling point components including water and hydrocarbon solvent and / or petroleum solvent evaporated in the main agent adjusting step is 20 to 35% by weight of the mixture weight. A method for producing a surface coating agent.   The method for producing a surface coating agent according to any one of claims 1 to 3, wherein the fixing agent contains at least one of organosilane, alkoxysilane, alkoxysiloxane, and silicone emulsion. Further, it contains at least one auxiliary agent selected from salt damage inhibitors, antistatic agents, and ultraviolet light inhibitors,
When the auxiliary agent contains a hydrocarbon solvent and / or a petroleum solvent, the auxiliary agent is added to and mixed with the mixture of the aqueous coating agent and the oily coating agent, and the auxiliary agent is added to the hydrocarbon solvent and / or Alternatively, when a petroleum solvent is not contained, the auxiliary agent is added in the fixing agent adding step. The method for producing a surface coating agent according to any one of claims 1 to 4.   A surface coating agent obtained by the production method according to claim 1. A raw material adjusting device for stirring and mixing the aqueous coating agent and the oily coating agent;
A main agent adjusting device that heats a mixture of the aqueous coating agent and the oil-based coating agent, evaporates a predetermined amount of low boiling point components including water and hydrocarbon solvent and / or petroleum solvent contained in the mixture;
A low boiling point component recovery device for recovering low boiling point components including water and hydrocarbon solvent and / or petroleum solvent discharged from the main agent adjusting device;
A cooling device for cooling the main agent discharged from the main agent adjusting device;
A fixing agent adding device for adding and mixing the fixing agent to the cooled main agent;
The cleaning liquid which has washed the main agent adjusting apparatus using the low boiling point component containing water and hydrocarbon solvent and / or petroleum solvent recovered by the low boiling point component recovery apparatus is recovered, and the cleaning liquid is water and hydrocarbon solvent and / or Or a cleaning liquid recovery device that separates into low-boiling components containing petroleum solvents and residues;
A low-boiling component return line for returning low-boiling components containing water and hydrocarbon solvent and / or petroleum-based solvent separated by the cleaning liquid recovery device to the low-boiling component recovery device;
And a residue transport line for sending the residue separated by the cleaning liquid recovery device to the raw material adjusting device.

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