JP2011111591A - Surface coating agent - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a surface coating agent usable both for a glass surface and a coated film, and having good durability. <P>SOLUTION: The surface coating agent is obtained by preparing a mixture containing 21-24 wt.% fluororesin, 13-15 wt.% silicone resin, 6-8 wt.% silicone oil, 20-29 wt.% inorganic powder, 31-33 wt.% hydrocarbon-based and/or petroleum-based solvent, 5-8 wt.% total of a surfactant and water, and 0-1 wt.% wax, the total being 100 wt.%, heating the resulting mixture, evaporating 20-35% of water and a low boiling point component containing the hydrocarbon-based and/or petroleum-based solvent from the mixture to prepare a main agent, cooling the main agent, and adding and mixing a fixing agent to the cooled main agent, the amount of the fixing agent being 0.5-1.5 wt.% of the main agent. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a surface coating agent used for glass surfaces and coating films.

  There exists a thing of patent document 1 as a surface coating agent which can be used for both glass surfaces and coating films, such as a vehicle.

This conventional surface coating agent is manufactured through the following steps.
First, a commercially available aqueous coating agent and an oil-based coating agent are mixed, and in 100% by weight, the fluororesin is 25 to 30% by weight, the silicone resin is 5 to 12% by weight, the silicone oil is 1 to 5% by weight, inorganic powder 20 to 29% by weight, hydrocarbon solvent and / or petroleum solvent 15 to 30% by weight, surfactant and water 3 to 10% by weight and wax 0 to 1% by weight.
Then, the mixture is heated to evaporate a predetermined amount of water and low-boiling components containing hydrocarbon solvent and / or petroleum solvent contained in the mixture to adjust the main agent.
Finally, the main agent is cooled, and a fixing agent is added to and mixed with the main agent after cooling to obtain a surface coating agent.

JP 2008-050470 A

Although the conventional surface coating agent has an advantage that it does not give a glare even when used on a glass surface, there is a problem that the coating is easily peeled off and the effect is not sustained.
Then, this invention makes it a subject to provide the surface coating agent which can be used for both a glass surface and a coating film, and has favorable durability.

In order to solve the above problems, the present inventor has completed a surface coating agent obtained through the following steps as a result of intensive studies.
That is, first, in 100% by weight, the fluorine resin is 21 to 24% by weight, the silicone resin is 13 to 15% by weight, the silicone oil is 6 to 8% by weight, the inorganic powder is 20 to 29% by weight, the hydrocarbon solvent and A mixture containing 31 to 33% by weight of a petroleum solvent, 5 to 8% by weight of a surfactant and water, and 0 to 1% by weight of a wax is prepared.
Such a mixture is easily obtained by mixing a commercially available aqueous coating agent and an oily coating agent.
Next, this mixture is heated, and low-boiling components containing water and hydrocarbon solvent and / or petroleum solvent contained in the mixture are evaporated by 20 to 35% of the weight of the mixture to adjust the main agent.
Finally, the main agent is cooled, and the fixing agent is added to and mixed with the main agent after cooling by 0.5 to 1.5% by weight of the main agent to obtain a surface coating agent.

The fixing agent preferably contains at least one of organosilane, alkoxysilane, alkoxysiloxane, and silicone emulsion.
The surface coating agent may further contain at least one auxiliary agent selected from a salt damage inhibitor, an antistatic agent and an ultraviolet ray preventing agent.

  This surface coating agent can be used for both glass surfaces and coating films, and maintains the advantage of the above conventional coating agent that it does not give glare even when used on a glass surface, while the hardness when applied is conventional. Therefore, the coating is difficult to peel off and the durability is good.

The surface coating agent concerning embodiment of this invention can be manufactured by the following 1st process-4th process, for example.
First, as a first step, a water-based coating agent and an oil-based coating agent are stirred and mixed to prepare a mixture.
Next, as a second step, these mixtures are heated to evaporate a predetermined amount of low-boiling components containing water and hydrocarbon-based solvents and / or petroleum-based solvents, thereby obtaining a main agent.
Further, as the third step, the main agent obtained in the second step is cooled.
Finally, as a fourth step, the surface coating agent of the embodiment is obtained by adding and mixing a predetermined amount of the fixing agent to the main agent that has been cooled to lower the temperature.

Here, the first step and the second step do not necessarily need to be clearly distinguished. While stirring and mixing the aqueous coating agent and the oily coating agent, they are heated at the same time, and a predetermined amount of water and a hydrocarbon solvent and Alternatively, low boiling components including petroleum solvents may be evaporated.
In addition, a 2nd, 3rd process is abbreviate | omitted, and a fixed surface coating agent is obtained by adding the fixing agent of a 4th process to the mixture of the oil-based coating agent and aqueous coating agent obtained at the 1st process. Can do. However, when such a surface coating agent is applied to a glass surface, a slight sensation of glare remains, and the performance is greatly inferior to that of a surface glazing agent having a low glare sensation such as the surface coating agent of the embodiment.

Examples of the oil-based coating agent used in the production of the surface coating agent according to the embodiment include a commercially available oil-based coating agent. However, it is preferable that the content of wax is small, and it is more preferable that no wax is included.
Similarly, the aqueous coating agent may be commercially available, and preferably contains a small amount of wax, and more preferably contains no wax.
This is because if 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, a silicone resin, a silicone oil, an inorganic powder, a hydrocarbon solvent and / or a petroleum solvent can be used.
In particular, inorganic powder containing zirconia can be preferably used. This is because the strength of the coating is increased by adding zirconia to the surface coating agent.
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 referred to here includes ceramics.
Moreover, the oil-based coating agent does not necessarily need to use one type of oil-based coating agent, and may be a mixture of several types of oil-based coating agents. Similarly, several types of water-based coating agents may be mixed.

The mixture after the first step is 21 to 24% by weight of fluororesin, 13 to 15% by weight of silicone resin, 6 to 8% by weight of silicone oil, and 20 to 29% by weight of inorganic powder in 100% by weight (preferably 23 to 27% by weight), 31 to 33% by weight of hydrocarbon solvent and / or petroleum solvent, 5 to 8% by weight of surfactant and water, and 0 to 1% by weight of wax. .
In addition, the adjustment method of this mixture is not limited to mixing an oil-based coating agent and an aqueous coating agent as described above, and in short, it is only necessary to have such a composition as a result of mixing a plurality of materials.

  In the first step, it is preferable to further add and mix organic powder. The organic powder is preferably a fine fluororesin powder or a Teflon (registered trademark) powder, and the addition amount is 0.1 to 0.00 by weight with respect to the mixture 100 of the oil-based coating agent and the aqueous coating agent. 3 is preferred.

The removal amount of the low boiling point components including water and hydrocarbon solvent and / or petroleum solvent in the second step is 20 to 35% by weight of the mixture, and preferably 30 to 35% by weight.
By adjusting the main agent in this way, the surface coating agent of the embodiment becomes creamy and does not have a high viscosity and is easy to handle.
Further, by adjusting the composition within this range, phase separation does not occur even when stored for a long time. The heating operation in the second step 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, for example, a heat exchanger. Here, the cooling temperature is preferably 50 ° C. or lower, particularly 35 ° 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 sticking agent to the main agent is preferably 0.5 to 1.5 with respect to the main agent 100 in weight ratio, and more preferably 1.0 to 1.2 with respect to the main agent 100 in weight ratio.

Further, the surface coating agent of the embodiment 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 addition of the auxiliary agent is 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. The hydrocarbon solvent and / or petroleum solvent contained in the auxiliary agent is removed by heating in the process.
Thus, the feeling of glare when the surface coating agent of the embodiment is applied to the glass surface is suppressed.
The addition ratio of the auxiliary agent is preferably 0.2 to 2.0 with respect to the main agent 100 in weight ratio, and more preferably 0.5 to 1.0 with respect to the main agent 100 in weight ratio. preferable.

The configuration of the surface coating agent of the embodiment is as described above, and the method of using this surface coating agent is basically the same as that of a conventional oil-based coating agent or aqueous coating agent.
Since the surface coating agent of the embodiment has a cream-like property, the surface coating agent is applied to an object using a cloth or a sponge in the same manner as a conventional oil-based coating agent or aqueous coating agent, and then applied to the surface. What is necessary is just to wipe off the surplus surface coating agent in the state which became white a little.
Furthermore, when applying a surface coating agent, if a small water droplet is attached 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 coating of the surface coating agent is easier. Become.
In addition, the surface coating agent of the embodiment can be overcoated, and when a second application is performed after a lapse of time from the first application of the surface coating agent, the film thickness of the surface coating agent is increased. In addition, the hardness of the coating itself is increased, and the effects such as antifouling property, rust resistance and water repellency 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.
It should be noted that the surface coating agent of the embodiment has a high hardness, and therefore the coating is difficult to peel off and the durability is good, as seen in the examples described later.

The surface coating agent of the embodiment can be used for coatings of automobiles, aircrafts and ships, glass, plastics, rubber products and the like, and is highly versatile, and protects these surfaces from rainwater and contaminants.
In addition, when the inventor applied a surface coating agent to the coating film, etc., and examined the antifouling property, rust resistance, and water repellency durability, it was confirmed that these performances hardly changed even after half a year or more. It was done.
Further, since the surface coating agent of the embodiment 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, dust in the air does not adhere even after a long period of time, and the coating surface does not become dirty.

  Hereinafter, an Example is given and the characteristic of the surface coating agent concerning invention is further clarified.

As an example, fluorine resin is 22% by weight, silicone resin is 14% by weight, silicone oil is 7% by weight, inorganic powder is 20% by weight, hydrocarbon solvent and / or petroleum solvent is 31% by weight, surfactant. And a mixture containing 6% by weight of water, and heating the mixture to evaporate 30% of the weight of the mixture by low-boiling components including water and hydrocarbon solvents and / or petroleum solvents. The surface coating agent was prepared by cooling the main agent, adding 1% by weight of the weight of the main agent to the main agent after cooling, and mixing.
Further, as Comparative Example 1, 25% by weight of fluororesin, 10% by weight of silicone resin, 5% by weight of silicone oil, 30% by weight of inorganic powder, 20% by weight of hydrocarbon solvent and / or petroleum solvent, A mixture containing 10% by weight of a surfactant and water is prepared, and the mixture is heated to evaporate 30% of the weight of the low-boiling components including water and hydrocarbon solvent and / or petroleum solvent contained in the mixture. The surface coating agent described in Patent Document 1 was prepared by adjusting the main agent, cooling the main agent, and adding 1% by weight of the fixing agent to the main agent after cooling and mixing.

(Test 1)
After the glass surface was washed and dried, the surface coating agent of the example 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 a coating agent were applied to the glass surface in the same manner as in Comparative Example 1 above.
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 1.
In this table, Comparative Example 1 is a surface coating agent of Patent Document 1, Comparative Example 2 is a commercially available WAX, Comparative Example 3 is a polymer coating agent “Blis” manufactured by Bliss Japan Ltd., and Comparative Example 4 is a glass manufactured by Linley. Each of the coating agents “Mirax Polishing Coat” is shown.

  As shown in Table 1, the surface coating agent of the example, like the surface coating agent of Patent Document 1, has a faster water drop flow rate and water repellency than the case where a commercially available wax or coating agent is applied. Are better. Moreover, even if the surface coating agent was applied to the glass surface, there was no glaring feeling.

(Test 2)
The surface coating agent of the example and the surface coating agent of Comparative Example 1 were applied to the painted surface of the vehicle under the same conditions, and the hardness was measured over time (every 24 hours).
The results are shown in Table 2. The hardness is represented by the minimum hardness of the pencil core from which the film is peeled off with a commercially available pencil.

  As shown in Table 2, the surface coating agent of the example has higher hardness and better durability than the surface coating agent of Comparative Example 1.

(Test 3)
The surface coating agent of the example was applied to various types of dirt and scratches shown in Table 3 attached to the white 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 3. In addition, for small scratches, a sufficient repair effect was seen.

Claims (3)

In 100% by weight, fluorine resin is 21 to 24% by weight, silicone resin is 13 to 15% by weight, silicone oil is 6 to 8% by weight, inorganic powder is 20 to 29% by weight, hydrocarbon solvent and / or petroleum-based A mixture containing 31 to 33% by weight of a solvent, 5 to 8% by weight of a surfactant and water, and 0 to 1% by weight of a wax was prepared,
This mixture is heated to adjust the main agent by evaporating 20 to 35% of the weight of the mixture including water and hydrocarbon-based solvent and / or petroleum-based solvent contained in the mixture,
Cool this base,
A surface coating agent obtained by adding 0.5 to 1.5% by weight of the weight of the main agent to the main agent after cooling and mixing.   The surface coating agent according to claim 1, wherein the fixing agent contains at least one of organosilane, alkoxysilane, alkoxysiloxane, and silicone emulsion.   The surface coating agent according to claim 1 or 2, further comprising at least one auxiliary agent selected from salt damage inhibitors, antistatic agents, and ultraviolet ray inhibitors.