JP2758806B2 - Method for producing a material having excellent water repellency, corrosion resistance, snow resistance, weather resistance and lubricity - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention, water repellency, water resistance, corrosion resistance,耐着snow resistance, a process for the <br/> manufacturing weather resistance and lubricity both excellent material.

[0002]

2. Description of the Related Art If materials having excellent water repellency, waterproofness, corrosion resistance, snow resistance and lubricity are developed, antennas, cables, steel towers, jigs for civil engineering machines, and jigs for electronic equipment which are hard to snow are hard to snow. A wide range of applications such as equipment cases are possible. Therefore, attempts have been made to develop a material having these characteristics. However, the conventional technique has the following disadvantages. That is, there is a method in which the contact angle is increased until the contact angle approaches 180 degrees, and as a result, water resistance is expected.This method is based on the wet plating technique (`` Chemistry '' Vol. 46, No. 7). No. 1991, p. 477)
Therefore, this treatment can be applied only to an object to which a wet plating treatment can be applied. On the other hand, solid Teflon and the like have insufficient water repellency, and it is difficult to ensure water repellency, waterproofness, corrosion resistance, snow resistance, weather resistance and lubricity that can withstand harsh environments. There has been a long-awaited need for a new coating material, a method for producing the same, and a new coating method.

[0003]

As described above, in the prior art, a material satisfying all of water repellency, waterproofness, corrosion resistance, snow accretion resistance and lubricity has not been obtained.

[0004] It is an object of the present invention to provide a material which satisfies the above-mentioned prior art, and which satisfies all of the above-mentioned characteristics, and a method of manufacturing the same.

[0005]

SUMMARY OF THE INVENTION The object of the present invention is to provide a fluorinated graphite powder having an unbound fluorine content of 3% by weight or less and a particle diameter of 8 μm or less by using an acrylic silicon resin, an acrylic resin, a polyester resin, an epoxy resin, After uniformly mixing and dispersing so that the volume fraction is 1 to 70% in one or more kinds of fluororesin and urethane resin, 100K
g / cm ² or higher, sintering at a temperature of 120% or less of the melting point of the resin measured at the absolute temperature and higher than the heat deformation temperature, and uniformly mixing and dispersing graphite fluoride powder can do.

[0006] The application range of this material is wide, and for example, it can be widely applied to telecommunication outdoor facilities and the like that require long-term reliability. Further, in the above, the corrosion resistance and lubricity can be further enhanced by replacing the inside of the resin sintered body with a sintered body such as a fluorine resin.

In the process of heating a fluorine resin or the like, the unbound fluorine content is 3% by weight or less and the particle diameter is 8%.
μm or less fluorinated graphite powder with a surface area fraction of 1
By adhering so as to be 70%, effects such as water repellency and lubricity can be concentrated on the surface.

[0008]

In the above, the content of unbonded fluorine in the fluorinated graphite is set to 3% by weight or less because of the bond caused by the electric polarity with water molecules and the hydrogen and hydrogen, which hinder the properties such as water repellency. This is to prevent binding. Here, the reason why the particle size is set to 8 μm or less is that if the particle size is larger than 8 μm, the specific surface area showing water repellency becomes small, and the effects such as water repellency are reduced. Further, the fraction of graphite fluoride is 1 to 70.
% Is less than 1%, the effect of water repellency does not appear,
If the content is 70% or more, graphite fluoride is separated from the resin. The reason why the pressure at the time of pressurization is 100 kg / cm ² or more is that molding is difficult at a pressure lower than this.
The reason why the sintering temperature was set to 120% or less of the melting point of the resin and the heat deformation temperature or more was that at a temperature of 120% or more of the melting point, the sintered body began to partially melt, and it became difficult to maintain the shape. At a temperature below the deformation temperature, sintering takes too much time and is not economical.

In addition, one or more kinds of mixed resin powder of acrylic silicone resin, acrylic resin, polyester resin, epoxy resin, fluorine resin and urethane resin are mixed at 100 kg / cm.
After being compacted with a pressure of ² or less, the resin was heated to a temperature of 120% or less of the melting point measured in absolute temperature, and the surface was heated to a temperature of 120% or less during or after heating at a temperature higher than the heat distortion temperature. In this state, graphite fluoride having a non-bonded fluorine content of 3% or less and a particle diameter of 8 μm or less is uniformly adhered to the surface of the resin so as to have an area fraction of 1 to 70%. The effect of can be obtained,
In this case, the adhesion temperature of the graphite fluoride powder was set to a temperature equal to or higher than the melting point and equal to or higher than 120% of the melting point. At a temperature equal to or higher than 120% of the melting point, it is difficult to keep only the surface in a molten state. Is inevitable, and
At a temperature lower than the melting point, the adhesion of the graphite fluoride powder to the sample surface becomes insufficient.

[0010]

EXAMPLES The material of the present invention and the method for producing the same will be specifically described below with reference to examples.

[0011]

Example 1 A graphite fluoride powder having an unbound fluorine content of 2% by weight and a particle diameter of 7 μm was mixed and dispersed in a fluorine resin so that the volume fraction was 30%, and the pressure was 150 kg / cm ² . 603K melting point and thermal deformation temperature of 412
Sintering was performed at 573K, a temperature between K.

When a contact angle was measured by dropping a water drop on the above-mentioned sintered material, it showed a value of 161 °, indicating excellent water repellency. The sample was exposed to ultraviolet light (equivalent to outdoor exposure for 5 years) for 1000 hours using a sunshine weather meter, and the contact angle was measured. The result showed a value of 158 degrees, indicating that the sample had excellent weather resistance. Was done.

[0013] Since this sample has water repellency, it is possible in principle to avoid corrosion, snow accretion, etc. caused by the adhesion of water. In addition, the surface of this sample was
When rubbed with No. Emery Paper, it became clear that the material had lubricity without causing fine irregularities on the surface due to its slipperiness.

[0014]

Example 2 A graphite fluoride powder having an unbound fluorine content of 2% by weight and a particle diameter of 6 μm was mixed and dispersed in an acrylic silicon resin so as to have a volume fraction of 20%.
After compacting at a pressure of g / cm ² , sintering was performed at 593K. A drop of water was dropped on this sintered sample and the contact angle was measured.
It showed a value of 9 degrees and showed excellent water repellency. Further, in the same manner as in Example 1, this sample was irradiated with ultraviolet rays for 1000 hours using a sunshine weather meter, and the contact angle was measured. As a result, the sample showed a value of 153 degrees, indicating that it had excellent weather resistance. Was known.

Since this sample has water repellency, corrosion, snow accretion, etc. caused by the adhesion of water can be avoided in principle. Further, when this sample was rubbed with No. 600 emery paper, it became clear that the sample had lubricity without causing fine irregularities on the surface due to its slipperiness.

[0016]

Example 3 Fluorinated graphite powder having an unbound fluorine content of 3% by weight and a particle diameter of 8 μm or less was mixed and dispersed in a polyester resin so that the volume fraction became 60%, and 200 K
After compacting at a pressure of g / cm ² , sintering was performed at 583K. A drop of water was dropped on this sample and the contact angle was measured.
The value of degree was shown, and excellent water repellency was shown. In addition, when the contact angle was measured after irradiating this sample with ultraviolet rays for 1000 hours using a sunshine weather meter in the same manner as in Example 1, the sample showed a value of 164 degrees, indicating that it had excellent weather resistance. Was known.

Since this sample has water repellency, it is possible in principle to avoid corrosion, snow accretion, etc. caused by the adhesion of water. In addition, the surface of this sample was
When rubbed with No. Emery Paper, it became clear that the material had lubricity without causing fine irregularities on the surface due to its slipperiness.

[0018]

Example 4 After compacting an acrylic silicon resin powder at a pressure of 200 kg / cm ^2, a graphite fluoride powder having an unbonded fluorine content of 3% by weight or less and a particle diameter of 8 μm or less was added to the acrylic silicon resin. The mixture was covered with a mixed powder mixed and dispersed so as to have a volume fraction of 40%. Then 150Kg / cm ²
And then sintered at 573K. A drop of water was dropped on this sintered body and the contact angle was measured.
The value of degree was shown, and excellent water repellency was shown. The sample was irradiated with ultraviolet rays for 1000 hours with a sunshine weather meter in the same manner as in Example 1, and the contact angle was measured. It was known that.

Since this sample has water repellency, it is possible in principle to avoid corrosion, snow accretion, etc. caused by the adhesion of water. In addition, the surface of this sample was
When rubbed with No. Emery Paper, it became clear that the material had lubricity without causing fine irregularities on the surface due to its slipperiness.

[0020]

REFERENCE EXAMPLE 1 Acrylic silicone resin powder was compacted at a pressure of 200 kg / cm ² , and graphite fluoride powder having an unbonded fluorine content of 3% by weight or less and a particle diameter of 8 μm or less was obtained by area fraction. The surface of the green compact was sprinkled so as to have a concentration of 60% and sintered at a temperature of 573K. When the contact angle was measured by dropping a water drop on the sintered body, it showed a value of 166 degrees, indicating excellent water repellency. The sample was irradiated with ultraviolet rays for 1000 hours with a sunshine weather meter in the same manner as in Example 1, and the contact angle was measured. It was known that. Since this sample has water repellency, it can in principle avoid corrosion, snow accretion, and the like caused by the adhesion of water.

[0021]

Comparative Example 1 Acrylic silicone resin powder was compacted at a pressure of 200 kg / cm ² and then sintered at a temperature of 573K. When a water drop was dropped on the sintered body and the contact angle was measured, it showed a value of 65 degrees. The contact angle of this sample was measured after irradiating it with ultraviolet rays for 1000 hours using a sunshine weather meter in the same manner as in Example 1, and the result showed a value of 45 degrees.
From this result, it can be seen that this sample is inferior in both water repellency and weather resistance to the sample of the present invention found in each of the above Examples. Furthermore, when the surface of this sample was rubbed with No. 600 emery paper, it became clear that fine irregularities were generated on the surface and the lubricity was inferior to the sample of the present invention.

[0022]

Comparative Example 2 Teflon resin powder was compacted at a pressure of 250 kg / cm ² and then sintered at a temperature of 633K. When a water drop was dropped on the sintered body and the contact angle was measured, it showed a value of 110 degrees. The contact angle was measured after irradiating this sample with ultraviolet rays using a sunshine weather meter.
It showed a value of 104 degrees. From this result, it can be seen that this sample is less water repellent than the sample of the present invention.

Table 1 shows the results of measurement of the initial contact angle and the contact angle after irradiation with ultraviolet rays for each of the above-mentioned Examples and Comparative Examples.

[0024]

[Table 1]

[0025]

As described above, the method of manufacturing the material of the present invention solves the problems of the prior art and provides water repellency, corrosion resistance, snow resistance, and weather resistance. it is possible to provide a manufacturing method of a material excellent in gender and lubricity both.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI C08L 33/00 C08L 33/00 63/00 63/00 Z 67/02 67/02 75/04 75/04 // C08L 101 / 00 C08L 101/00 B29K 105: 16 (58) Fields investigated (Int. Cl. ⁶ , DB name) C08L 27/12-27/24 C08L 33/00-33/26 C08L 63/00-63/10 C08L 67/00-67/08 C08L 75/00-75 / 16,101 / 00 C09D 127/12-127/24 C09D 133/00-133/26 C09D 163/00-163/10 C09D 167/00-167/08 C09D 175/00-175 / 16,201 / 00 B32B 27/18

Claims (4)

(57) [Claims] 1. A fluorinated graphite powder having an unbound fluorine content of not more than 3% by weight and a particle diameter of not more than 8 μm is prepared by adding one of acrylic silicone resin, acrylic resin, polyester resin, epoxy resin, fluorine resin and urethane resin. After uniformly mixing and dispersing so that the volume fraction becomes 1 to 70% in the mixed resin of plural types, the resin is pressurized at a pressure of 100 kg / cm ² or more, and 120% or less of a melting point measured at an absolute temperature of the resin. , a thermal deformation temperature or higher and sintered, water repellency, characterized in that to uniformly mixed dispersing the fluoride graphite powder,
A method for producing a material having excellent corrosion resistance, snow resistance, weather resistance and lubricity. 2. An acrylic silicone resin, an acrylic resin, a polyester resin, an epoxy resin, a fluorine resin, or a mixture of a plurality of urethane resins, wherein the unbound fluorine content is 3% by weight or less and the particle diameter is 8 μm or less. A volume fraction of 1 to 70 in a fluorinated graphite powder in one or more mixed resins of acrylic silicone resin, acrylic resin, polyester resin, epoxy resin, fluorine resin and urethane resin
Method of manufacturing% become so uniformly crawling, characterized in that it covered a mixed resin obtained by mixing an aqueous, corrosion resistance,耐着snow resistance, excellent weather resistance and lubricating material. 3. A resin powder of one or more of an acrylic silicone resin, an acrylic resin, a polyester resin, an epoxy resin, a fluorine resin and a urethane resin is pressed at a pressure of 100 kg / cm ² or more, and the absolute temperature of the resin is determined. Is sintered at a temperature of not more than 120% of the melting point measured in the above step and not less than the heat deformation temperature. The sintered body is made of acrylic graphite powder having an unbound fluorine content of not more than 3% by weight and a particle diameter of not more than 8 μm. After covering with a mixed powder of silicon resin, acrylic resin, polyester resin, epoxy resin, fluorine resin and urethane resin mixed with one or more kinds of mixed resin so that the volume fraction is 1 to 70%, 100Kg / cm ² or more pressurized with pressure, further, the melting point of a mixed resin thereof or less, evenly mixed dispersed in the sample outside side the fluoride graphite powder by sintering at a deformation temperature or higher A method for producing a material having excellent water repellency, corrosion resistance, snow accretion resistance, weather resistance, and lubricity. 4. A resin powder of one or more of an acrylic silicone resin, an acrylic resin, a polyester resin, an epoxy resin, a fluorine resin and a urethane resin is pressed at a pressure of 100 kg / cm ² or less, and the absolute temperature of the resin is determined. The unbonded fluorine content on the surface of the resin is 3% with the surface being at or above the melting point and 120% or less of the melting point during or after heating at a temperature of 120% or less of the melting point and the heat distortion temperature or more measured in Step 3.
% Or less, and graphite fluoride having a particle size of 8 μm or less is uniformly adhered so as to have an area fraction of 1 to 70%, and is characterized by water repellency, corrosion resistance, snow resistance, weather resistance and lubrication. Method of manufacturing materials with excellent properties.