KR102487379B1 - Paint composition for freezing prevention and manufucaturing method thereof - Google Patents

Abstract

The present invention relates to a coating composition for anti-icing adhesion, and more particularly, includes polyorganosiloxane rubber, mercapto silane as a curing agent, and any one additive selected from texture additives and water repellent additives. An anti-icing coating composition having excellent durability, physical strength and anti-icing functionality of a coating film formed by applying the anti-icing coating composition to a material and improved adhesion to materials, and its preparation It's about how.

Description

Anti-icing paint composition and its manufacturing method {PAINT COMPOSITION FOR FREEZING PREVENTION AND MANUFUCATURING METHOD THEREOF}

The present invention is a coating composition having an anti-icing function, which includes polyorganosiloxane rubber having anti-icing function, and is applied to a material to have durability, coating strength, and anti-icing prevention of a coating film formed by applying the same to a surface. It relates to a coating composition for anti-icing adhesion capable of improving properties such as performance and a manufacturing method thereof.

When ice or snow accumulates on a power transmission line in the winter, it turns into piping as shown in FIG. 1, and grows in an asymmetrical shape by gravity or wind, and the piping acts like a wing against the wind. When the pibbed wire is subjected to strong wind, a large amplitude of vibration (Galloping) is generated along with resistance, causing a short circuit accident of the power line. It is known that the size of the galloping is determined by various factors such as the distance between towers, the type of wire, the stiffness and tension of the wire support point, the weight of icing, the distribution of icing, and wind change. In addition, damages such as galloping phenomenon as well as bridge phenomenon caused by icing snow or disconnection of wires exceeding the tensile strength of power lines due to icing snow load have been reported.

In case of such damage to the transmission line, there are problems in that a lot of time and money are required for inconvenience and restoration due to a power outage in a wide area. In Korea, there is a history of accidents caused by icing and snow on 345kV ACSR (Aluminum Conductor Steel Reinforced) overhead wires near Baekbokryeong in the Taebaek Mountains during the cold season. Accordingly, an increase in the occurrence of similar damage is expected.

According to data from the American Energy Association in 2011, the direct damage caused by snow icing amounts to 500 million dollars a year. It is known. Snow accretion increases the weight load of transmission lines by up to 130%, causing serious power outages due to excessive design strength due to line sagging and disconnection due to sleet jump of overhead lines.

Various methods are being tried as a way to solve the problem caused by snow accumulation on power transmission lines. A method of removing it directly by a person by using physical snow removal equipment, removing it using specially designed dedicated facilities such as However, it is insufficient to see it as an effective countermeasure because it contains problems such as cost, efficiency, and deterioration in line durability.

In recent studies, electromagnetic methods such as suppressing icing by utilizing heat generation caused by eddy currents and methods of suppressing icing through surface super-repellent coating have been introduced to prevent icing, but in the case of electromagnetic methods, actual power transmission lines When applied to a furnace, it is difficult to apply due to problems such as corona discharge, and in the case of super-water repellent coating, detailed adjustment of materials and process conditions is required, so it is a level that can only be confirmed in a small laboratory. There are limits.

Republic of Korea Patent Publication No. 10-2015-0049976

Considering the above problems, the present invention is a technology that is differentiated from previously developed anti-icing devices or anti-icing paints, and provides physical functionality with improved anti-icing functionality and durability of coatings while being applicable to actual power transmission lines. It is an object of the present invention to provide an anti-icing coating composition in which an additive including mercapto silane is applied to polyorganosiloxane rubber having release property and a method for manufacturing the same.

In order to achieve the above object, the coating composition for anti-icing adhesion of the present invention includes polyorganosiloxane rubber, mercapto silane as a curing agent, and any one additive selected from texture additives and water repellent additives. It is characterized in that it includes.

Based on 100 parts by weight of the anti-icing coating composition, the polyorganosiloxane rubber may be included in 88.9 to 90.0 parts by weight and the mercapto silane may be included in 0.9 to 2.0 parts by weight.

As the texture additive, polymethylsilsesquioxane may be preferably used.

The texture additive may be included in an amount of 8.7 to 9.1 parts by weight based on 100 parts by weight of the anti-icing paint composition.

The water repellent additive may be included in an amount of 4.8 parts by weight to 6.0 parts by weight based on 100 parts by weight of the anti-icing paint composition.

In order to achieve another object of the present invention, a method for preparing a coating composition for anti-icing adhesion includes polyorganosiloxane rubber, mercapto silane as a curing agent, and any one additive selected from texture additives and water repellent additives. Mixing a coating composition for anti-icing adhesion comprising a; may include.

In the method for producing an anti-icing coating composition of the present invention, based on 100 parts by weight of the anti-icing coating composition, the polyorganosiloxane rubber is 88.9 to 90.0 parts by weight, and the mercapto silane is It may be included in 0.9 to 2.0 parts by weight.

As the texture additive, polymethylsilsesquioxane may be preferably used.

The texture additive may be included in an amount of 8.7 to 9.1 parts by weight based on 100 parts by weight of the anti-icing paint composition.

The water repellent additive may be included in an amount of 4.8 parts by weight to 6.0 parts by weight based on 100 parts by weight of the anti-icing paint composition.

100 parts by weight of the anti-icing coating composition means that the sum of the total anti-icing coating composition is 100 parts by weight.

The anti-icing coating composition of the present invention is a coating composition that realizes anti-icing functionality, and can improve the adhesion to the material coated with the polyorganosiloxane rubber (Polyorganosiloxane Rubber) having excellent release properties and the curability of the paint. By including mercapto silane as a curing agent, physical strength such as durability and strength of the coating film, which are pointed out as disadvantages of general rubber coating films, is improved, and icing through early anti-icing performance, accelerated weather resistance, and outdoor exposure test There is an effect of improving adhesion prevention function.

In addition, since the adhesion to the material is improved, the secondary primer coating is omitted, and the anti-icing function is maintained for a long time with only single painting, so the efficiency of the painting process of the anti-icing coating composition can be improved.

1 is a photograph showing the state of piping occurring on a power transmission line.
Figure 2 is a chemical structural formula of mercapto silane (Mercapto silane).
Figure 3 is a schematic diagram showing the state in which the coating composition for anti-icing adhesion of the present invention is applied to the ACSR surface.
Figure 4 is a load-displacement curve of each coating film for anti-icing coating composition prepared according to the examples and the control group of the present invention.
Figure 5 is a schematic diagram showing a method for evaluating the anti-icing performance of a specimen formed with a coating film with a coating composition for ice-adhered ice using an ice adhesion tester.
6 is a graph showing accelerated weather resistance in the anti-icing coating composition prepared according to Example 3 and the control group of the present invention.
Figure 7 is a graph showing the anti-icing performance during outdoor exposure in the anti-icing coating composition prepared according to Example 3 and the control group of the present invention.
8 is a graph showing the anti-icing performance of the anti-icing coating composition prepared according to Examples 3 and 4 of the present invention and the control group.

Terms such as "consists of", "includes", or "added" used in this specification should not be construed as necessarily including all of the various elements described in the specification, and some of them are not included. It may not be, and should be construed as being able to further include additional components.

The anti-icing coating composition of the present invention includes polyorganosiloxane rubber, a curing agent, and additives.

The polyorganosiloxane rubber is a silicone-based resin having low surface tension and excellent releasability, and imparts anti-icing performance in paint compositions. However, the polyorganosiloxane rubber is less compatible than acrylic resins, alkyd resins, epoxy resins, etc., which are widely used as general paint resins, and has low adhesion to the material of the coated product on which the paint composition is painted. , the physical strength is low.

Therefore, the coating composition for anti-icing adhesion is a curing agent capable of chemically crosslinking the polyorganosiloxane rubber to improve adhesion to the material, curability of the paint, and strength of the coating, and the chemical structural formula shown in FIG. 2 Add mercapto silane (Mercapto silane) represented by

Based on 100 parts by weight of the total anti-icing coating composition, the polyorganosiloxane rubber is included in 84.6 to 90.9 parts by weight.

The mercapto silane may be added in a ratio of polyorganosiloxane rubber and mercapto silane in a mass ratio of 44.5: 1, and based on 100 parts by weight of the total anti-icing coating composition, the mercapto silane includes 0.9 to 2.0 parts by weight it is desirable

If the polyorganosiloxane rubber is less than 84.6 parts by weight based on 100 parts by weight of the total anti-icing coating composition, the strength and durability of the coating film formed of the anti-icing coating composition as well as the anti-icing property may be reduced, and the polyorganosiloxane If the rubber is 90.9 parts by weight or more, the content of mercapto silane added as a curing agent in the anti-icing coating composition is relatively reduced, resulting in a decrease in physical properties such as durability of the coating composition, as well as adhesion to materials Since this deterioration can easily peel off the coating film and cause problems in the anti-icing function, it is preferable to satisfy the content range suggested above.

Additives of various components are added to improve additional performance in addition to anti-icing performance in the coating composition for anti-icing adhesion, and any one selected from texture additives and water-repellent additives may be used as the additive.

As the texture additive, polymethylsilsesquioxane is preferably used as it can change the surface energy of the coating film formed by painting the anti-icing coating composition to improve release properties.

The texture additive is included in an amount of 8.7 to 9.1 parts by weight based on 100 parts by weight of the anti-icing coating composition.

When the texture additive is included in less than 8.7 parts by weight based on 100 parts by weight of the total anti-icing coating composition, the original function of the texture additive in the coating composition is not fulfilled in a small amount, and the release property is lowered, so that the anti-icing coating composition is painted. Problems such as cracks may occur on the surface of the formed coating film, and when the amount exceeds 9.1 parts by weight based on 100 parts by weight of the total anti-icing coating composition, the release property improvement effect is no longer improved in proportion to the content. It is preferably included in the content range.

The water-repellent additive is an additive for improving the initial anti-icing function of a coating film formed by painting the anti-icing coating composition, and serves to prevent initial freezing by imparting water-repellent performance to the anti-icing coating composition, and is a siloxane-based water repellent ( Siloxane hydrophobing agent) is preferably used.

The water repellent additive may be included in an amount of 4.8 parts by weight to 6.0 parts by weight based on 100 parts by weight of the anti-icing coating composition, preferably 4.8 parts by weight based on 100 parts by weight.

An anti-icing coating composition having a composition and content including polyorganosiloxane rubber as described above, mercapto silane as a curing agent, and any one additive selected from texture additives and water repellent additives The final coating composition for anti-icing adhesion is prepared by mixing evenly using a stirrer, and the prepared coating composition for anti-icing adhesion is applied to the surface of wire components such as ACSR (Aluminum Conductor Steel Reinforced) made of aluminum as shown in FIG. Paint to form a coating film.

Here, a coating method known to those skilled in the art in the art to which the present invention pertains is used as a method of coating the surface of the product to be treated, such as electric wire components, and is not particularly limited.

Hereinafter, the anti-icing coating composition of the present invention will be described in detail based on examples, and these examples can be implemented in various different forms by those skilled in the art as an example. It is not limited to the embodiment described in

Table 1 shows the components of the anti-icing coating composition according to the embodiment of the present invention, and the composition and content shown in Table 1 were prepared by mixing the main agent and various additives so that they were sufficiently and uniformly mixed. The unit of content of the components described herein is parts by weight.

division Example 1 Example 2 Example 3 Example 4 control group subject Polyorganosiloxane rubber 90.9 90.0 88.9 84.6 0 RTV-11 0 0 0 0 99.5 additive texture additive 9.1 9.1 9.1 8.7 0 water repellent additive 0 0 0 4.8 0 curing agent mercapto silane 0 0.9 2.0 1.9 0 tin catalyst 0 0 0 0 0.5 Sum 100.0 100.0 100.0 100.0 100.0

In Table 1, RTV-11 is a commercially available industrial waterproof rubber, which is room temperature vulcanizing silicon rubber, which is one of liquid silicone rubber (LSR), and the texture additive is polymethylsilsesqui Polymethylsilsesquioxane was used, and a siloxane hydrophobing agent was used as a water repellent additive. In the control group for comparison with the examples, a tin catalyst was used instead of mercapto silane as a curing agent. used

In order to evaluate the physical properties of the anti-icing coating composition prepared with the components and contents of the above examples and the control group, the coating composition for anti-icing adhesion of the examples and control groups shown in Table 1 is coated on an aluminum substrate to form a coating film. Formed to prepare a specimen and evaluated the physical properties in the following experimental example.

Experimental Example 1 evaluates the durability and strength of the coating film, and changes in load on the coating film of the specimen based on ASTM E2546 using NHT ³ , a nanoindentation tester capable of measuring the mechanical properties of the coating film The degree of displacement was evaluated to evaluate the durability and strength of the coating film, and the results are shown in Table 2 and FIG. 4 below.

division Example 1 Example 2 Example 3 control group Strength (MPa) 2.924 3.440 4.141 1.627

As shown in Table 2, the coating film strength of the anti-icing coating composition of Examples 1 to 3 and the control group was the highest at 4.141 MPa in Example 3, whereas the control group was 1.627 MPa in Example 1. It was found that the strength of the coating film of Example 3 was significantly lower than that of Example 3.

4 is a load-displacement curve according to Examples 1 to 3 and the anti-icing coating composition of the control group. In FIG. 4, it can be seen that the coating film composed of the control coating composition has a lower strength of the coating film than the rest of Examples 1 to 3, and the anti-icing coating composition according to the embodiment of the present invention improves the strength and durability of the coating film. improvement can be seen.

Experimental Example 2 was to confirm the anti-icing performance through accelerated weather resistance and outdoor exposure tests, and to evaluate the degree of aging over time for the coating film made of the anti-icing coating composition of the present invention, the accelerated weather resistance in the room As an accelerated weathering test, a WOM accelerated weathering test was performed, and a natural weathering test was performed. Using Xenon Arc Weather Ometer (Ci3000+, ATLAS Co.) equipment, a WOM accelerated weather resistance test of the coating film was conducted under ISO 16474-2/11341 standard test conditions, and a new change in anti-icing performance was established after 720 hours. It was measured using an ice adhesion tester as shown in FIG. 5 .

As shown in FIG. 5, the ice adhesion tester places a specimen on which an ice column is formed due to the freezing of the surface of the coating film on the upper part of the cooling plate of the ice adhesion tester, and the force measurement part of the ice adhesion tester moves the ice column. The strength was measured when shearing, and the results are shown in FIGS. 6 and 7.

6 is a graph showing accelerated weather resistance in the anti-icing coating composition prepared according to Example 3 and the control group of the present invention. As shown in FIG. 6, the initial anti-icing performance evaluated through the WOM accelerated weathering test was 720 Over time, the control specimens were found to be superior to the Example 3 specimens.

However, as shown in FIG. 7, it was found that the anti-icing performance of the control specimen deteriorated compared to the specimen of Example 3 as time elapsed in the outdoor exposure test. In contrast, the sample of Example 3 was judged not to change significantly from the initial anti-icing performance shown in the WOM accelerated weathering test even after the outdoor exposure time, and it can be seen that excellent anti-icing performance is maintained.

In addition, in the case of the coating film in the control specimen having the anti-icing function including additives without crosslinking functionality, durability including the strength of the coating film due to external environmental factors such as sunlight, ultraviolet rays, heat, moisture, shock, etc. during outdoor exposure was lacking. However, in the case of the coating film of Example 3, gambling peeling, etc. It was confirmed that the property defect did not occur and the anti-icing performance was maintained.

Experimental Example 3 is ice for Example 4, which is an anti-icing coating composition in which a siloxane hydrophobing agent is additionally applied as a water-repellent additive to improve the anti-icing function, Example 3 without adding a water-repellent additive, and the control group. The anti-icing performance of the coating film was evaluated using an ice adhesion tester, and the average value calculated by repeating the measurement twice is shown in FIG. 8 .

As shown in FIG. 8, Example 4, in which the initial water repellency was improved by adding a siloxane hydrophobing agent to the paint composition, showed improved freezing adhesion strength values compared to the control group, and the anti-icing adhesion function was previously tested. It was confirmed that the coating film of Example 3 and the control group was improved.

As described above, the coating composition for anti-icing adhesion of the present invention includes mercapto silane as a curing agent that can improve the adhesion to materials and the curability of paint to polyorganosiloxane rubber, It was confirmed that the durability of the coating film, the strength of the coating film, the anti-icing performance, the anti-icing function through the accelerated weather resistance and the outdoor exposure test, as well as the adhesion to the material are superior to those of the conventional anti-icing functional paint.

Claims (10)

polyorganosiloxane rubber;
Mercapto silane represented by the following chemical formula as a curing agent; and
Including; any one additive selected from texture additives and water repellent additives,
Based on 100 parts by weight of the coating composition for anti-icing adhesion,
88.9 to 90.0 parts by weight of the polyorganosiloxane rubber;
The mercapto silane (Mercapto silane) is 0.9 to 2.0 parts by weight; and
When the additive is a texture additive, polymethylsilsesquioxane (Polymethylsilsesquioxane) is 8.7 to 9.1 parts by weight as the texture additive; anti-icing coating composition comprising a.
[chemical formula]

delete delete delete According to claim 1,
The anti-icing coating composition, characterized in that the water-repellent additive is 4.8 parts by weight based on 100 parts by weight of the anti-icing coating composition. Mixing an anti-icing coating composition comprising polyorganosiloxane rubber, mercapto silane represented by the following formula as a curing agent, and any one additive selected from texture additives and water repellent additives; Including,
Based on 100 parts by weight of the coating composition for anti-icing adhesion,
88.9 to 90.0 parts by weight of the polyorganosiloxane rubber;
The mercapto silane (Mercapto silane) is 0.9 to 2.0 parts by weight; and
When the additive is a texture additive, polymethylsilsesquioxane (Polymethylsilsesquioxane) is 8.7 to 9.1 parts by weight; Method for producing a coating composition for anti-icing, characterized in that it comprises a texture additive.
[chemical formula]

delete delete delete According to claim 6,
The water-repellent additive is a method for producing an anti-icing coating composition, characterized in that 4.8 parts by weight to 6.0 parts by weight based on 100 parts by weight of the anti-icing coating composition.

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