KR101323960B1 - Composition of coating material which have rust prevention performance and vibration damping effect as water based and method for manufacturing the same - Google Patents

Abstract

The aqueous antirust and dustproof coating composition prepared according to one embodiment of the present invention may be coated on various equipment and facilities requiring automobiles and rustproofing to achieve excellent antirust performance. In addition, by applying the aqueous anti-corrosion and dust-proof coating composition according to one side of the present invention to the connection with the noise source from which the noise is generated can obtain a noise reduction effect due to vibration damping, does not generate volatile organic substances during application Air pollution can be prevented. Furthermore, due to the aqueous antirust and dustproof coating composition according to one aspect of the present invention, it is possible to provide a film that can sufficiently withstand the stones and other hard foreign matter that bounces while driving the vehicle, thereby diversifying the function of the product Not only that, but also the efficiency of the application process can be greatly increased.

Description

Aqueous anti-corrosion and anti-vibration coating composition and a method of manufacturing the same {COMPOSITION OF COATING MATERIAL WHICH HAVE RUST PREVENTION PERFORMANCE AND VIBRATION DAMPING EFFECT AS WATER BASED AND METHOD FOR MANUFACTURING THE SAME}

Aqueous antirust and antifouling coating compositions and methods for their preparation are disclosed. More specifically, the present invention discloses a coating composition and a method for producing the same, which have excellent anti-corrosion property and dust resistance, and which can prevent air pollution by not generating volatile organic substances.

In general, the control technology related to the vibration of the vehicle affects the ride comfort of the vehicle, and the interest of this is increasing among users of luxury vehicles. In other words, the control technology for the noise and vibration of the car is for quietness and comfort indoors and outdoors, and the interest in the modern society with high quality of life is increasing. Noise reduction due to vibration damping is mainly by attaching a pad to the inside of the vehicle and applying a material mainly containing polyvinyl chloride (PVC) to the outside, but a material using polyvinyl chloride is vulnerable to rust resistance.

Therefore, after the pretreatment of the vehicle body for rust prevention, soundproofing, and dustproof treatment, PVC deadener is applied, 140 ° C heat-drying, middle degree, and top coating, and the dustproof pad is attached to the lower part of the vehicle body after assembly is completed. Since antirust and soundproofing and dustproof treatment are performed by applying antirust wax, volatile organic substances are released into the air due to the cumbersome process and heat drying of the dadner, which causes a problem that adversely affects the environment.

In addition, anti-rust wax has excellent long-term anti-rust performance, but after drying, it forms a film of flexible wax and uses oil-based anti-rust wax, so that the solvent is volatilized during drying. There is a disadvantage that the coating film is easily damaged by the hard foreign matter present in the.

Provided is a coating composition and a method for producing the same, which have excellent anti-corrosion and dust-proof properties, and do not generate volatile organic substances, thereby preventing air pollution.

The aqueous antirust and dustproof coating composition according to an embodiment of the present invention is a material selected from the group consisting of styrene-acryl copolymer, styrene-butadiene copolymer and mixtures thereof, 40 to 75% by weight, thickener 0.1 to 5% by weight %, 0.01 to 1.5% by weight of antifoaming agent, 5 to 20% by weight of inorganic microshell (micro shell), 0.5 to 8% by weight of titanium dioxide, and 1 to 20% by weight of zinc compound.

In the aqueous antirust and dustproof coating composition according to one side of the present invention, the color pigment may further comprise 0.01 to 2% by weight.

In the aqueous antirust and dustproof coating composition according to one aspect of the present invention, the material selected from the group consisting of styrene-acryl copolymer, styrene-butadiene copolymer and mixtures thereof is an emulsion containing 40 to 60% of water. may be in an (emulsion) state.

In the aqueous antirust and dustproof coating composition according to one side of the present invention, the thickener may be in the form of clay.

In the aqueous antirust and dustproof coating composition according to one side of the present invention, the inorganic microshell may be a porous material.

In the aqueous antirust and dustproof coating composition according to one side of the present invention, the zinc compound may be zinc oxide or zinc phosphate.

According to another embodiment of the present invention, a method for preparing an aqueous antirust and dustproof coating composition may include 40 to 75 wt% of a material selected from the group consisting of styrene-acryl copolymers, styrene-butadiene copolymers, and mixtures thereof, and a thickener 0.1. Preparing a first mixture by mixing 5 wt% to 0.01 wt% to 1.5 wt% of an antifoaming agent, and preparing a second mixture by adding 5 to 20 wt% of an inorganic microshell to the first mixture. And adding 0.5 to 8% by weight of titanium dioxide and 1 to 20% by weight of zinc compound to the second mixture to prepare a third mixture.

In the method for preparing an aqueous antirust and dustproof coating composition according to one side of the present invention, the method may further include preparing a fourth mixture by adding 0.01 to 2% by weight of a color pigment to the third mixture.

In the method for preparing an aqueous antirust / dustproof coating composition according to one aspect of the present invention, the forming of the first mixture, the forming of the second mixture, and the forming of the third mixture may include 10 to 35. It may be carried out in the temperature range of ℃.

In the method for producing an aqueous antirust and dustproof coating composition according to one aspect of the present invention, the material selected from the group consisting of styrene-acrylic copolymer, styrene-butadiene copolymer, and mixtures thereof is 40 to 60% of water. It may be in an emulsion state contained.

In the preparation method of the aqueous antirust and dustproof coating composition according to one side of the present invention, the thickener may be in the form of clay.

In the method for preparing an aqueous antirust and dustproof coating composition according to one side of the present invention, the inorganic material microshell may be a porous material.

In the method for preparing an aqueous antirust and dustproof coating composition according to one side of the present invention, the zinc compound may be zinc oxide or zinc phosphate.

The aqueous antirust and dustproof coating composition prepared according to one embodiment of the present invention may be coated on various equipment and facilities requiring automobiles and rustproofing to achieve excellent antirust performance.

In addition, by applying the aqueous anti-corrosion and dust-proof coating composition according to one side of the present invention to the connection with the noise source from which the noise is generated can obtain a noise reduction effect due to vibration damping, does not generate volatile organic substances during application Air pollution can be prevented.

Furthermore, the aqueous antirust and dustproof coating composition according to one side of the present invention can provide a film that can sufficiently withstand the stones and other hard foreign matters that bounce off while driving the vehicle, thereby protecting the workpiece from impacts, etc. Not only can the product's functions be diversified, it can also greatly increase the efficiency of the application process.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may unnecessarily obscure the subject matter of the present invention. In addition, the terms described below are established in consideration of the functions of the present invention, and these may vary depending on the intention of the manufacturer or custom in the industry, and the definition should be based on the contents throughout the specification.

The present invention relates to a waterborne rust-proof and dust-proof coating composition and a method for manufacturing the same that can be obtained by coating a variety of equipment that requires rust prevention, such as automobiles and steel structures at the same time.

The aqueous antirust and dustproof coating composition according to an embodiment of the present invention is a material selected from the group consisting of styrene-acryl copolymer, styrene-butadiene copolymer and mixtures thereof, 40 to 75% by weight, thickener 0.1 to 5% by weight %, 0.01 to 1.5% by weight of antifoaming agent, 5 to 20% by weight of inorganic microshell (micro shell), 0.5 to 8% by weight of titanium dioxide, and 1 to 20% by weight of zinc compound.

The styrene-acrylic copolymer, styrene-butadiene copolymer, and mixtures thereof may be in an emulsion state containing 40 to 60% of water. The styrene-acrylic copolymer, styrene-butadiene copolymer and mixtures thereof may serve as a binder in compositions requiring rust resistance.

In particular, the styrene-acryl copolymer is a copolymer of styrene monomer and acrylate, and may exhibit various properties depending on the content of the styrene monomer and acrylate. Styrene-acrylic copolymers can be used for paper, additives, and various adhesives.The glass transition temperature (Tg) is around room temperature, and it acts as a binder in aqueous rustproof / dustproof coating compositions. Sound insulation effect can be improved.

Thickeners are substances that increase the viscosity of the composition and may be in the form of clays. Thickening agent has the advantage of effectively obtaining thixotropy nature in the aqueous rust-preventing and dust-proof coating composition according to one side of the present invention, may also help to prevent the settling of the following inorganic materials. In addition, thixotropy nature may allow the undried coating to remain intact when the finished composition is applied to the subject.

Defoamers are substances that remove harmful bubbles or prevent foaming, and may be silicone based aqueous defoamers. Such antifoaming agents are compatible with styrene-acrylic copolymers in an emulsion state containing water.

Here, compatibility is when two or more substances are mixed with each other in the form of dissolution or dispersion, and no phenomenon such as separation, precipitation, or recrystallization occurs, and they can exhibit a desired function by physical or chemical action between the substances. it means. The antifoaming agent's desired function in one aspect of the present invention can be to dissipate or suppress bubbles in a liquid phase within a relatively fast time to form a continuous film without bubbles.

The inorganic microshell may be a porous material, and may play a role of insulation, condensation prevention, and shock absorption. Microshell is an inorganic material that is ignited by volcanic eruption igneous rock is formed by pulverizing the fine particles and then foamed at a high temperature by a specific heat treatment method, the size of the particles may vary depending on the application.

In the aqueous antirust and dustproof coating composition according to the aspect of the present invention, the microshell may exhibit shock absorption and vibration damping performance, and may increase the volume of material per unit mass compared to other inorganic materials because of its light weight due to porosity. have. In addition, the microshell is an inorganic material obtained by pulverizing the igneous rock produced by volcanic eruption by precision particles and then foamed at a high temperature by a specific heat treatment method, the size of the particles may vary depending on the use, one side of the present invention The average particle size of the microshell at can be around 45 μm.

Titanium dioxide serves to increase the whiteness of the paint, and zinc compounds have a higher tendency to ionize than iron, and thus, can provide excellent anti-rusting properties for iron-based alloys or metal coatings of the alloy. In one aspect of the invention the zinc compound may be zinc oxide or zinc phosphate.

In addition, when a color is required in the aqueous antirust / dustproof coating composition according to one side of the present invention, a desired color pigment may be further included. The color pigments used may be previously dispersed as fine particles in an aqueous atmosphere, and thus do not separate or settle even during long-term storage, and may not be changed in the liquid state even after being mixed with the binder used in the present invention.

Hereinafter, a method of preparing an aqueous antirust and dustproof coating composition according to another embodiment of the present invention will be described.

The method for producing an aqueous antirust and dustproof coating composition according to one aspect of the present invention includes a styrene-acryl copolymer, a styrene-butadiene copolymer, and a mixture selected from the group consisting of 40 to 75 wt% of a thickener, and 0.1 to a thickener. Preparing a first mixture by mixing 5 wt% and 0.01 to 1.5 wt% of an antifoaming agent, and preparing a second mixture by adding 5 to 20 wt% of an inorganic microshell to the first mixture. And adding 0.5 to 8% by weight of titanium dioxide, and 1 to 20% by weight of zinc compound to the second mixture to prepare a third mixture.

In addition, when color is required in the aqueous antirust and dustproof coating composition, the method may further include preparing a fourth mixture by adding 0.01 to 2% by weight of a desired color pigment.

First, 40 to 75% by weight of a material selected from the group consisting of styrene-acrylic copolymers, styrene-butadiene copolymers and mixtures thereof is placed in a container, where 0.1 to 5% by weight of a thickener in the form of clay and 0.01 to 1.5 antifoaming agents are added thereto. The first mixture can be prepared by mixing the wt%. This mixing process is a homogeneous dispersion form, not dissolving each other, so that it should be made according to the conditions described later to sufficiently eliminate thixotropy and bubbles generated in the subsequent mixing step.

The material selected from the group consisting of styrene-acrylic copolymers, styrene-butadiene copolymers and mixtures thereof may be in an emulsion state containing 40 to 60% of water, and the thickener may be ammonium-treated in clay form.

The process of preparing the first mixture may be performed for 10 to 60 minutes at a rotational speed of 500 to 1500 rpm in a temperature range of 10 to 35 ℃. These process conditions give a homogeneous liquid first mixture.

Thereafter, the second mixture may be prepared by adding 5-20% by weight of the microshell, which is a porous lightweight inorganic material, little by little into the first mixture until the bubbles disappear. At this time, the process of preparing the second mixture may be performed for 10 to 30 minutes at a rotation speed of 500 ~ 1500 rpm in the temperature range of 10 ~ 35 ℃. As in the process of preparing the first mixture, these process conditions result in a homogeneous liquid second mixture.

Thereafter, 0.5 to 8% by weight of titanium dioxide, and 1 to 20% by weight of zinc compound may be added to the second mixture in order, followed by mixing until uniformly dispersed, to prepare a third mixture. In this case, the zinc compound may be zinc oxide or zinc phosphate. In addition, the process of preparing the third mixture may be performed for 5 to 30 minutes at a rotation speed of 500 ~ 1500 rpm in the temperature range of 10 ~ 35 ℃. As with the process for preparing the first mixture, these process conditions allow for obtaining a homogeneous liquid third mixture.

The titanium dioxide and zinc compounds should be added after the microshell is added to the first mixture to prepare the second mixture. The reason is that if the microshell is added later than the titanium dioxide and zinc compound, the volume increases momentarily and it is difficult to mix, so that the microshell is put before the titanium dioxide and zinc compound to keep the liquid mixture stable. Can be. When the mixing is continued after completion of the third mixing process, a sudden change occurs, such as a rapid increase in the viscosity of the liquid phase of the composition, so that the agitation must be terminated when a specific gravity and viscosity determined according to the composition are obtained.

Subsequently, when a color is required in the aqueous antirust and dustproof coating composition, a fourth mixture may be prepared by adding 0.01 to 2% by weight of a desired color pigment.

After all, in the production method of the aqueous antirust and dustproof coating composition according to one side of the present invention by performing a mixing process for a specific time at a rotational speed of 500 ~ 1500 rpm in a temperature range of 10 ~ 35 ℃ A rustproof and dustproof coating composition can be manufactured.

In addition, after applying the aqueous anti-corrosion and dust-proof coating composition prepared as described above to the required area, when fast drying is required, such as in the PVC Dadner coating process, a temperature range of 60 ~ 80 ℃ much lower than conventional 140 ℃ Significant energy savings can also be achieved by heating and drying for 0.5 to 1 hour at.

Example

The amount of the mixed raw material is shown in Table 1 below, the amount of each component to be mixed is expressed in weight (g), the amount of the mixture is representative of many experiments.

Constituent Weight (g) Styrene-acrylic copolymer 150.0 Thickeners in the form of clay 0.4 Antifoam 1.7 Instant corrosion inhibitor 2.1 Micro shell 20.8 Titanium dioxide 12.5 Zinc oxide 10.4 Zinc phosphate 10.4

The instant corrosion inhibitors used in Table 1 are intended to prevent stains in the process of evaporation and drying of moisture before the composition is applied to form a complete coating. Instant corrosion inhibitors are broadly divided into those with and without trace nitrites, and both with and without nitrite can be used.

As a result of testing the sample prepared with the composition, the result shown in Table 2 was obtained.

Test Items Quality requirements result Solids 50% or more 61% Drying time Should be within 2 hours About 50 minutes Wear resistance 18kg or more at 500㎛ coating thickness 51 Impact resistance No crack or peeling off when the weight weighing 500 g is dropped at a drop distance of 30 cm Good Flexibility No crack or peeling Good

As described above, the present invention has obtained good results such as corrosion resistance, water resistance, wear resistance, flex resistance, impact resistance, and the like.

In the present invention, the moisture drying time was measured in units of 10 minutes after 30 minutes have elapsed, and most of the curing drying was completed within 24 minutes at 20 to 25 ° C. and a relative humidity of 50% or less. Confirmed.

In addition, the viscosity was investigated in the liquid phase dispersed in water, not in a dry state, and after three days by applying the liquid to the specimen to investigate the corrosion resistance, water resistance, wear resistance, flex resistance, impact resistance and the like.

Corrosion resistance is to know the performance to protect the metals from rust. It was evaluated by the salt spray test according to ASTM B-117, and the dry film thickness did not occur within 1000 hours in the range of 300 ~ 500 ㎛. It has been found to meet the requirements as a sustainable antirust coating.

In addition, the water resistance was confirmed that the iron test piece coated with a dry film thickness in the range of 300 ~ 500 ㎛ immersed in distilled water for 10 days and then rusted or peeled off, but confirmed that the condition is good.

Wear resistance is to evaluate the performance of the composition is applied to the lower part of the vehicle, the wheel housing, etc., to prevent the damage of the electrodeposited coating of the vehicle, such as sand or stones of small size springs up during the driving of the vehicle. The nut having an outer diameter of 7 mm was continuously dropped, but the total weight of the dropped nut was continuously measured until the coating was damaged, and wear resistance was evaluated based on the value.

Flex resistance is to check whether the film is maintained without cracking or peeling when bending the finished iron test piece, and to know whether the film is damaged when the actual coated steel sheet is deformed by external impact or force. The test was carried out through a mandrel of 20 mm. In addition, impact resistance dropped 500 g of the weight to the test piece in which the film was completed at the height of 30 cm, and there was no abnormality, such as a crack and peeling, even in deformation of an iron plate.

As a result of examining the thermal properties, it was confirmed that the glass transition temperature (Tg) was near room temperature. The higher the content of the filling material, the higher the glass transition temperature. Among the thermal properties of the polymer used in the mixing process, a polymer having a glass transition temperature near room temperature is known to have the best noise reduction effect due to vibration damping.

In addition, the vibration damping effect is influenced by the thickness ratio of the coated film and the iron plate which is the conductor. In the present invention, the loss factorfmf was measured by SAE J1637 by applying 1500 μm, which is approximately twice the thickness of the iron plate, to obtain a value of 0.04. . It was confirmed that the vibration damping effect was very excellent when compared to the value of 0.0006 iron specimen without any coating.

In addition, when the glass transition temperature was high, cracking occurred in the impact and flexibility test at room temperature.

Table 3 below shows the viscosity measurements.

Item Test Methods result Viscosity (cps) 25 ° C, Brookfield 7000 ~ 12000 cps

Viscosity is one of the most important properties in the painting process. The higher the viscosity, the worse the flowability and the uniform coating. In particular, in the coating process by the spraying method, the spraying is not performed when the viscosity is high. In the present invention was measured using a Brookfield's rotary viscometer and the viscosity was measured at 25 ℃. Spindles were measured using three to five spindles, ie, high viscosity 5 times, low viscosity 3 times, and most samples had a rotational speed of 20 rpm. As a result, the higher the content of the inorganic material used as the filling material, the higher the viscosity, and the higher the content of the solid material as a whole it can be seen that increases.

In addition, the salt spray test was performed to confirm the rust prevention performance, the salt spray test was applied to the material and dried for 3 days and then sprayed 5% of the brine in a confined space continuously to test whether rust is generated within 1000 hours No rust was found to be excellent.

The water resistance test of Table 4 is a test for confirming the effect on the water of the applied test piece, the composition was applied at room temperature and dried for 3 days, soaked in a suitable size water tank for about half, and left for 240 hours. Phenomena such as the occurrence of rust were confirmed and good results were obtained. In addition, the total weight of the nut was continuously measured until the coating was damaged, and the wear resistance was evaluated through the value, and excellent results were also obtained in the wear resistance test as shown in Table 5.

Item Test Methods result Salt Spray Test ASTM B-117 No more than 1000 hours Water resistance Immerse in distilled water at room temperature No more than 240 hours

As shown in Table 5, abrasion resistance results were obtained.

Item Test Methods result Wear resistance Nut drop from 2m height, total weight of nut dropped 51 kg

The applied aqueous antirust / dustproof / soundproof coating composition prepared according to one side of the present invention has a hard film obtained by evaporation of moisture, so unlike the composition using a conventional solvent, there is almost no content of volatile organic substances discharged into the air. In addition, it is not only environmentally friendly, but also greatly improves the working environment in the manufacturing process. In addition, the applied aqueous antirust / dustproof / soundproof coating composition prepared according to one aspect of the present invention has a glass transition temperature near room temperature, is very effective in compositions for the purpose of rust prevention, and is a relatively large amount used for rust prevention. Despite the inorganic material, it showed very good stability even for a long period of more than 6 months.

As a result, the applied aqueous antirust / dustproof / soundproof coating composition prepared according to one side of the present invention provides two or more functions so that the conventional soundproof / dustproof process and the antirust process can be solved at once, thereby improving the efficiency of the process and The cost required for the application will also be reduced.

Therefore, the present invention can solve the dustproof pad, PVC dadner, the lower part of the vehicle body rust preventive in one process, there is no volatilization of organic substances, it is environmentally friendly and can minimize the human hazard.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood that various modifications and applications are possible. For example, each component specifically shown in the embodiment can be modified. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (13)

70 to 75% by weight of a material selected from the group consisting of styrene-acrylic copolymers, styrene-butadiene copolymers and mixtures thereof, 0.1 to 5% by weight of thickeners in clay form, 0.01 to 1.5% by weight of antifoaming agents, microshells as inorganic materials (micro shell) 5 to 20% by weight, 0.5 to 8% by weight titanium dioxide, and 1 to 10% by weight zinc oxide,
The inorganic microshell is an aqueous antirust and dustproof coating composition is a porous material.
The method of claim 1,
An aqueous antirust and dustproof coating composition further comprising 0.01 to 2% by weight of color pigments.
The method of claim 1,
An aqueous rust-proof and dust-proof coating composition in which the material selected from the group consisting of the styrene-acrylic copolymer, the styrene-butadiene copolymer and mixtures thereof is in an emulsion state containing 40 to 60% by weight of water.
delete delete delete Styrene-acrylic copolymer, styrene-butadiene copolymer and mixtures thereof 70 to 75% by weight of the material selected from the group consisting of 0.1 to 5% by weight of thickeners in the form of clay, defoamer 0.01 to 1.5% by weight of the first mixture Preparing a;
Preparing a second mixture by adding 5 to 20 wt% of an inorganic material (micro shell) to the first mixture; And
Adding 0.5 to 8 wt% of titanium dioxide and 1 to 10 wt% of zinc oxide to the second mixture to prepare a third mixture,
The inorganic microshell is a porous material, a method for producing an aqueous antirust and dustproof coating composition.
The method of claim 7, wherein
A method for producing an aqueous antirust and dustproof coating composition further comprising the step of adding a color pigment 0.01 to 2% by weight to the third mixture to prepare a fourth mixture.
The method of claim 7, wherein
Forming the first mixture, forming the second mixture, and forming the third mixture are performed at a temperature in the range of 10 to 35 ° C.
The method of claim 7, wherein
The styrene-acrylic copolymer, the styrene-butadiene copolymer and a material selected from the group consisting of a mixture of these, the production of an aqueous rust-proof dust-proof coating composition, which is in an emulsion state containing 40 to 60% by weight of water Way.
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