JP2780903B2 - A material excellent in water repellency, corrosion resistance, snow resistance, weather resistance and lubricity and a method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material having excellent water repellency, waterproofness, corrosion resistance, snow accretion resistance, weather resistance and lubricity, and a method for producing the same.

[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]

The object of the present invention is to achieve a molecular weight of 50.
A low molecular weight tetrafluoroethylene resin that is fluorinated to 0 to 20000 and to the end, acrylic silicone resin, acrylic resin,
Polyester resin, epoxy resin, fluorine resin and urethane resin are mixed and dispersed in one or more kinds of mixed resin powders so that the volume fraction is 1 to 70%, and compacted at a pressure of 100 kg / cm ² or more. Thereafter, it can be achieved by sintering the mixed powder at a temperature equal to or lower than 120% of the melting point measured at the absolute temperature and equal to or higher than the heat distortion temperature.

The application range of this material is wide, and it can be widely applied to, for example, outdoor facilities for telecommunications such as antennas that require long-term reliability. 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 fluororesin. In the process of sintering a fluorine resin or the like, the molecular weight is 500
Low molecular weight ethylene tetrafluoride fluorinated to the end at ~ 20,000
By attaching the resin powder so that the area fraction of the surface is 1 to 70%, effects such as water repellency can be concentrated on the surface.

[0007]

In the above, the molecular weight of the ethylene tetrafluoride resin is
The reason for setting the molecular weight to 500 to 20,000 is that if the molecular weight is less than 500, it is difficult to produce tetrafluoroethylene resin particles, and it is not economically attractive.
_This is due to a decrease in the number of the _three groups and a decrease in water repellency. In addition, the fluorination to the terminal is for preventing a bond and a hydrogen bond due to an electric polarity with a water molecule which is a factor of inhibiting properties such as water repellency.

The reason why the pressure at the time of pressing is set to 100 kg / cm ² or more is that molding is difficult at a pressure lower than 100 kg / cm ² .

The reason why the sintering temperature is set to 120% or less of the melting point measured in absolute temperature of the resin and to be equal to or higher than the thermal deformation temperature is that at a temperature of 120% or more of the melting point, the sintered body starts to partially melt and retains its shape. This is because the sintering takes too much time at a temperature lower than the heat deformation temperature and is not economical.

[0010] The reason why a 1-70% the fraction of tetrafluoroethylene resin in the above, in 1% or less not appear the effect of Hatsu aqueous aforementioned resin tetrafluoride ethylene resin in 70% In order to break away from

[0011]

EXAMPLES The structure and effects of the present invention will be specifically described below with reference to examples.

[0012]

Example 1 An ethylene tetrafluoride resin powder having a molecular weight of 8000 and having been fluorinated to the terminal was mixed and dispersed in a fluororesin so that the volume fraction became 20%, followed by compacting at a pressure of 170 kg / cm ^2. And sintering at a temperature of 563 K, which is between 603 K of the melting point of the fluorine resin and 412 K of the heat deformation temperature.

When a contact angle was measured by dropping a water drop on the sintered material, it showed a value of 159 degrees, indicating excellent water repellency. In addition, this sample was measured with a sunshine weather meter.
After irradiating with ultraviolet light for 00 hours (corresponding to outdoor exposure for 5 years), the contact angle was measured to show a value of 156 °, indicating that it had excellent weather resistance (FIG. 1).

Since this sample has water repellency,
Corrosion, snow accretion, etc. that occur through 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.

[0015]

Example 2 Ethylene tetrafluoride resin powder having a molecular weight of 8000 and having been fluorinated to the terminal was mixed and dispersed in an acrylic silicon resin powder so that the volume fraction became 40%, and compacted at a pressure of 180 kg / cm ^2. After that, when a water drop was dropped on the material sintered at 573K and the contact angle was measured, it showed a value of 164 degrees, indicating excellent water repellency. As in the case of Example 1, this sample was irradiated with ultraviolet rays for 1000 hours using a sunshine weather meter, and the contact angle was measured. The result showed a value of 161 °, indicating that the sample had excellent weather resistance. Was done.

Since this sample has water repellency,
Corrosion, snow accretion, etc. that occur through the adhesion of water can be avoided in principle. Also, when the surface of this sample was rubbed with No. 600 emery paper, due to its slipperiness,
It became clear that the material had lubricity without causing fine irregularities on the surface.

[0017]

Example 3 Ethylene tetrafluoride resin powder having a molecular weight of 8000 and fluorinated to the end was mixed and dispersed in a polyester resin powder so that the volume fraction became 60%, and compacted at a pressure of 200 kg / cm ² . Then, it was sintered at 583K. A drop of water was dropped on this sample, and the contact angle was measured. The result showed a value of 167 degrees, indicating excellent water repellency. In addition, when the sample was irradiated with ultraviolet rays for 1000 hours using a sunshine weather meter in the same manner as in Example 1, the contact angle was measured, and the value was 164 degrees, indicating that the sample had excellent weather resistance. It was known.

Since this sample has water repellency,
Corrosion, snow accretion, etc. that occur through the adhesion of water can be avoided in principle. Also, when the surface of this sample was rubbed with No. 600 emery paper, due to its slipperiness,
It became clear that the material had lubricity without causing fine irregularities on the surface.

[0019]

Example 4 After the acrylic silicon resin powder was compacted at a pressure of 200 kg / cm ² , the molded body was fluorinated to the end with a molecular weight of 8000, and ethylene tetrafluoride resin powder was volumetrically mixed in the acrylic silicon resin powder. The mixture was covered with a mixed powder mixed and dispersed so that the fraction became 60%, and then compacted with a pressure of 200 kg / cm ² , and the composite molded body was sintered at 588 K. A drop of water was dropped on the obtained sintered body to measure the contact angle.17
The value was 1 degree, indicating excellent water repellency. Further, when 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, the sample showed a value of 168 °, indicating that it had excellent weather resistance.

Since this sample has water repellency,
Corrosion, snow accretion, etc. that occur through the adhesion of water can be avoided in principle. Further, when the surface of 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.

[0021]

Example 5 An acrylic silicon resin powder was compacted at a pressure of 200 kg / cm ² , and then, on the surface of the compact, a fluorinated ethylene resin powder having a molecular weight of 8,000 and fluorinated to the terminal was obtained.
It was dusted to 30% and sintered at a temperature of 553K.
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 of this sample was measured after irradiation with ultraviolet rays for 1000 hours using a sunshine weather meter in the same manner as in Example 1, it showed a value of 158 degrees, indicating that the sample had excellent weather resistance. Was. Since this sample has water repellency, it is possible in principle to avoid corrosion, snow accretion, etc. caused by the adhesion of water.

[0022]

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. A drop of water was dropped on this sintered body, and the contact angle was measured. 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, a value of 51 ° was shown.

From these results, it can be seen that the present sample is inferior in both water repellency and weather resistance to the sample of the present invention. Further, when the surface of this sample was rubbed with No. 600 emery paper, it was found that fine irregularities were generated on the surface and the lubricity was poor as compared with the sample of the present invention.

[0024]

Comparative Example 2 Teflon resin powder was compacted under a pressure of 250 kg / cm ² and then sintered at a temperature of 630 K. A drop of water was dropped on the sintered body, and the contact angle was measured. In addition, when the contact angle was measured after irradiating this sample with ultraviolet rays for 1000 hours with a sunshine weather meter,
It showed a value of 96 degrees. Therefore, it is understood that the water repellency of this sample is lower than that of the sample of the present invention.

[0025]

As described above, by using the material and the manufacturing method of the present invention, the problems of the prior art can be solved, and the water repellency, corrosion resistance, snow resistance, and weather resistance can be solved. A material excellent in both lubricity and lubricity and a production method thereof can be provided.

[Brief description of the drawings]

FIG. 1 is a diagram showing the dependence of the contact angle of a sample of Example 1 on ultraviolet irradiation time.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI C08L 63/00 C08L 63/00 A 67/02 67/02 75/04 75/04 C09D 127/18 C09D 127/18 (58) Field surveyed (Int.Cl. ⁶ , DB name) C08L 27/18 C09D 127/18 C08L 33/00 C08L 63/00 C08L 67/02 C08L 75/04 B29C 67/04 B32B 27/18 B29C 59/00

Claims (6)

(57) [Claims] 1. A low-molecular-weight tetrafluoroethylene resin having a molecular weight of 500 to 20,000 and fluorinated to the terminal, wherein one or more kinds of acrylic silicone resin, acrylic resin, polyester resin, epoxy resin, fluorine resin and urethane resin are used. A material having excellent water repellency, corrosion resistance, snow resistance, weather resistance and lubricity, characterized by being dispersed in a resin mixture of 1 to 70% in volume fraction. 2. A low molecular weight ethylene tetrafluoride resin having a molecular weight of 500 to 20,000 and fluorinated to the terminal, and one or more kinds of acrylic silicone resin, acrylic resin, polyester resin, epoxy resin, fluorine resin and urethane resin. Mixed so that the volume fraction becomes 1 to 70% in the mixed resin powder of
After being dispersed and compacted at a pressure of 100 kg / cm ² or more, the mixed powder is sintered at a temperature of 120% or less of a melting point measured at an absolute temperature and a heat deformation temperature or more. A method for producing a material having excellent corrosion resistance, snow resistance, weather resistance and lubricity. 3. An acrylic silicone resin, an acrylic resin, a polyester resin, an epoxy resin, a fluorine resin and a urethane resin having a molecular weight of 500-2.
Low molecular weight tetrafluoroethylene with 0000 and terminally fluorinated
Resin powder in one or more kinds of mixed resin of acrylic silicone resin, acrylic resin, polyester resin, epoxy resin, fluorine resin and urethane resin by volume fraction of 1 to 70
A material excellent in water repellency, corrosion resistance, snow resistance, weather resistance and lubricity, characterized by being covered with a resin mixed and dispersed in%. 4. A method of compacting one or more mixed resin powders of acrylic silicone resin, acrylic resin, polyester resin, epoxy resin, fluorine resin and urethane resin at a pressure of 100 kg / cm ² or more. Having a molecular weight of 500 to 200
Low molecular weight ethylene tetrafluoride tree fluorinated at 00 and terminated
The volume fraction is 1 to 1 or a mixed resin powder of one or more of acrylic silicone resin, acrylic resin, polyester resin, epoxy resin, fluorine resin and urethane resin.
Cover with powder mixed and dispersed to 70%,
After being compacted at a pressure of 100 kg / cm ² or more, the mixed powder is sintered at a temperature of 120% or less of the melting point measured at the absolute temperature and a heat deformation temperature or more, characterized by water repellency, corrosion resistance,
A method for producing a material having excellent snow resistance, weather resistance and lubricity. 5. The surface of one or more kinds of mixed resins of acrylic silicone resin, acrylic resin, polyester resin, epoxy resin, fluorine resin and urethane resin having a molecular weight
Water repellency, corrosion resistance, characterized by being uniformly adhered to a low molecular weight tetrafluoroethylene resin powder of 500 to 20,000 and fluorinated to the terminal so as to have an area fraction of 1 to 70%.
Materials with excellent snow resistance, weather resistance and lubricity. 6. A method of compacting one or more mixed resin powders of acrylic silicone resin, acrylic resin, polyester resin, epoxy resin, fluorine resin and urethane resin at a pressure of 100 kg / cm ² or more. During or after heating at a temperature equal to or lower than 120% of the melting point measured in absolute temperature and equal to or higher than the heat distortion temperature, only the surface is heated to a temperature equal to or higher than the melting point and equal to or lower than 120% of the melting point. Two
Low molecular weight tetrafluoroethylene with 0000 and terminally fluorinated
A method for producing a material having excellent water repellency, corrosion resistance, snow accretion resistance, weather resistance, and lubricity, characterized by adhering a resin powder in an area fraction of 1 to 70%.