KR102240607B1 - Insulating paint - Google Patents

Abstract

The present invention relates to an insulation paint which has thermal insulation properties, heat shielding and waterproofing properties, excellent adhesion, and also has little risk of peeling or cracking even after a long period of time after construction, thereby reducing maintenance costs and being environmental friendly by using no organic solvents. According to the present invention, provided is an insulation paint composition containing 35 to 60 parts by weight of an aqueous binder, 5 to 20 parts by weight of an inorganic heat insulation agent, 3 to 15 parts by weight of hollow ceramic beads, 3 to 10 parts by weight of nano hollow fibers, and water.

Description

Insulating paint

The present invention relates to a thermal insulation coating, as well as thermal insulation properties, heat shielding, waterproof properties, excellent adhesion and environmentally friendly properties to a new composition of the thermal insulation coating.

Insulation paint is used in various fields such as various production facilities, heating and cooling equipment, and home appliances, as well as in places where insulation effect is required, such as in various buildings, and does not require a space for forming an insulation layer, so it is not only the main insulation means but also the main insulation. It is also widely used as an auxiliary insulation means to supplement the means such as insulation.

On the other hand, various types of insulation paints are being provided, but as consumers' demands for insulation properties become more demanding, insulation coatings with more excellent insulation properties are required.

In particular, asphalt shingles are often constructed as a roof waterproofing material. As the asphalt shingles are exposed to sunlight for a long time, the adhesive used during asphalt shingles deteriorates, resulting in loss of adhesion. Therefore, in the case of strong winds such as typhoons, the asphalt shingle falls off by the wind and looks ugly, and the asphalt shingle that falls off and rolls around may cause damage to surrounding structures or injury to people.

Korean Patent Registration No. 10-0324305 (2002. 01. 30.) Republic of Korea Patent Registration No. 10-2001-0019064 (2001. 03. 15.)

The present invention has been proposed in view of the above problems, and has excellent thermal insulation properties as well as heat shielding and waterproof properties, and has excellent adhesion, so that there is little risk of peeling or cracking even after a long period of construction, thereby reducing maintenance costs. It is to provide an eco-friendly new composition of thermal insulation paint without the use of organic solvents.

According to a feature of the present invention, characterized in that it comprises 35 to 60 parts by weight of an aqueous binder, 5 to 20 parts by weight of an inorganic heat insulating agent, 3 to 15 parts by weight of hollow ceramic beads, 3 to 10 parts by weight of hollow nanofibers, and water. An insulating coating composition is provided.

According to another feature of the present invention, the aqueous binder includes an acrylic emulsion, an acrylic-silicone emulsion, and a polyurethane emulsion in a weight ratio of 1:1.

According to another feature of the present invention, the inorganic insulating agent includes aluminum oxide, titanium dioxide, calcium carbonate, diatomaceous earth, pearlite, expanded vermiculite, volcanic ash having an average particle size of 20 to 60 μm, and the hollow ceramic beads have an average particle size. Is composed of silica-based fine particles of 15 ~ 60㎛. Insulation coating composition, characterized in that.

The present invention having the above composition has heat shielding and waterproof properties as well as thermal insulation properties, and has excellent adhesion properties. Therefore, when the present invention is used, a high-quality coating film is formed that has heat insulation, heat shielding, and waterproof properties and is less likely to peel off or crack even after a long period of time. Therefore, the maintenance cost is reduced because maintenance is not required frequently compared to the case of using the conventional insulation paint. In addition, since it does not use organic solvents as water-based paints, it is environmentally friendly and harmless to the human body.

The present invention is used not only for interior and exterior walls of buildings, but also for various purposes such as floors such as rooftops and parking lots.In particular, when asphalt shingles are used as roof finishing materials, when applied after asphalt shingles are applied, insulation on asphalt shingles according to the present invention , As a coating film having heat shielding and waterproof properties is formed, the adhesive used during the construction of the asphalt shingle is prevented from deteriorating and loss of adhesion, so the construction condition of the asphalt shingle does not fall off easily and the construction condition is maintained firmly.

Hereinafter, the present invention will be described in more detail through examples.

According to a preferred embodiment of the present invention, an aqueous binder, an inorganic heat insulating agent, ceramic hollow beads, nano hollow fibers, and water are included.

The aqueous binder includes an acrylic emulsion, an acrylic-silicone emulsion, and a polyurethane emulsion, which improves durability, adhesion, flexibility, etc. of the coating film, and improves the waterproof performance by increasing the watertightness of the coating film. In addition, the acrylic-silicone emulsion is a polymerization reaction of a silicone emulsion to an acrylic emulsion, and improves adhesion and weather resistance of a coating film. In addition, the polyurethane emulsion improves the adhesion of the coating film and imparts elasticity to the coating film. Preferably, an acrylic emulsion, an acrylic-silicone emulsion, and a polyurethane emulsion are mixed in a 1:1:1 weight ratio.

Preferably, this aqueous binder is included in 35 to 60 parts by weight based on the total 100 parts by weight. If the aqueous binder is contained less than the above level, the coatability and adhesion of the paint decrease, and if it is contained more than the above level, the content of other components is relatively reduced, and other physical properties such as thermal insulation properties of the coating film are excessively reduced, which is not preferable. .

The inorganic heat insulating agent is for improving the heat insulation and heat shielding properties of the coating film, and aluminum oxide, titanium dioxide, calcium carbonate, diatomaceous earth, pearlite, expanded vermiculite, and volcanic ash are used.

Aluminum oxide (alumina) has excellent thermal insulation and heat shielding properties with strong chemical properties against acids or alkalis. And titanium dioxide (Titanium Oxide) has excellent hiding power as well as heat insulation and heat shielding properties along with acid and alkali resistance. Calcium carbonate is a flame-retardant filler, and a VOC reducing agent protects the human body by efficiently deodorizing or removing volatile organic compounds (VOC), formaldehyde, acetaldehyde, and odors emitted from building materials, and affects any climatic conditions. It can be used with confidence because it does not have any effect. In addition, diatomaceous earth is excellent in adsorption and insulation of harmful substances, and pearlite is a material having excellent insulation and heat shielding properties. Volcanic ash is heat-resistant and porous, so it has thermal insulation.

When considering the dispersion characteristics and smoothness of the coating film, the inorganic heat insulating agent is preferably used having an average particle size of 20 to 60 μm, and is included in an amount of 5 to 20 parts by weight based on 100 parts by weight. If the content of the inorganic heat insulator is less than the above level, it does not have the required level of heat insulation, and if it is contained more than the above level, the coating property of the paint is excessively deteriorated. These inorganic insulating agents also function as extender pigments.

On the other hand, hollow ceramic beads are silica-based fine particles that are hollow and hollow inside, and are selected from the group consisting of borosilicate glass, aluminosilicate, and silicate.

Hollow ceramic beads have excellent thermal insulation characteristics because they have low thermal conductivity due to the hollow formed inside. Preferably, those having an average particle size of 15 to 60 µm are used, and in such a range, a coating film having high smoothness can be formed. These hollow ceramic beads are preferably included in 3 to 15 parts by weight based on the total 100 parts by weight. As the hollow ceramic beads are made of silica-based fine particles, the surface of the hollow ceramic beads has light reflectivity, and thus the light shielding properties are also expected to be improved by the hollow ceramic beads.

And the nano-hollow fiber is manufactured by electrospinning so that a hollow is formed in the center, and the nano-fiber refers to a fiber having a fiber diameter of 1,000 nm or less, more preferably 500 nm or less. The nano-hollow fiber is made of a thermoplastic resin such as polyester, and the internal hollow improves the thermal insulation properties of the coating film, increases the crosslinking density of the coating film, and reduces the width of change in shrinkage and expansion of the coating film, thereby preventing cracks in the coating film It also functions to prevent.

These nano-hollow fibers are pulverized to have a predetermined aspect ratio, that is, to have a predetermined length is used. Preferably, 3 to 10 parts by weight are added to the total 100 parts by weight, but if it is contained less than the above level, it is difficult to expect the effect of the nano hollow fibers, and if it is contained more than the above level, the workability of the paint due to excessive viscosity increase This can drop significantly.

The colored pigment is to impart color to the coating film, and is contained in 5 to 20 parts by weight based on 100 parts by weight. When the content of the coloring pigment is less than the above level, there is a problem that sufficient color expression is difficult, and when it exceeds 20 parts by weight, an increase in viscosity is caused, which is not preferable because there is a high possibility that workability may be significantly deteriorated.

In addition, in the present invention, water and other additive components commonly used in the manufacture of paints may be further included. Examples of the additives include coating aids, wetting agents, dispersing agents, antifoaming agents, anti-settling agents, coating smoothing agents, and sunscreen agents. Since these additives are not intended to exhibit a desired function, their usage is not particularly limited, and can be used in an appropriate amount if necessary.

The present invention having the above composition can be used for various purposes such as waterproofing the rooftop or parking lot floor as well as the inner wall and the building, and the paint according to the present invention is applied and a top coat is applied thereon if necessary. The present invention has heat insulation, heat shielding, and waterproof properties, and is excellent in adhesion, so that there is little risk of peeling or cracking even after a long period of time after construction, so that maintenance cost is reduced compared to the case of using a conventional insulating paint. In addition, since it does not use organic solvents as water-based paints, it is environmentally friendly and harmless to the human body.

In particular, the present invention is suitable for use even when an asphalt shingle is used as a roofing material. After constructing an asphalt shingle and applying the present invention thereon, the top coat is performed. A thermal layer is formed to prevent the adhesive used in the construction of the asphalt shingle from deteriorating and loss of adhesiveness. Therefore, even after a long period of time, the asphalt shingle does not fall off and the constructed state remains firm.

Experimental Example 1 and Comparative Example 1

After adding water and a thickener to the reaction vessel and stirring, dispersing agent, antifoaming agent, and wetting agent are added and stirred, and aluminum oxide, titanium dioxide, calcium carbonate, diatomaceous earth, pearlite, expanded vermiculite, volcanic ash, hollow ceramic beads, and hollow nanofibers are mixed. After the mixture was introduced and sufficiently dispersed at high speed, an acrylic emulsion and an acrylic-silicone emulsion were added and stirred, and then a defoaming agent was added and further stirred to prepare a heat insulating coating composition. The raw material usage ratio was as shown in Table 1 to prepare two types of coating compositions.

Item Experimental Example 1 Comparative Example 1 water 26 29 Thickener 0.3 0.3 Dispersant 0.2 0.2 Antifoam 0.2 0.2 Humectant 0.2 0.2 Leveling agent 0.1 0.1 Aluminum oxide 3 3 Titanium dioxide 2 2 Calcium carbonate 2 3 Diatomaceous earth 3 - Pearlite 3 - Expanded vermiculite 2 - Volcanic ash 2 - Hollow ceramic beads 7 7 Hollow nanofiber 3 - Coloring pigment 5 5 Acrylic emulsion 23 50 Acrylic-silicone emulsion 18 -

<Thermal Conductivity Evaluation>

In order to evaluate the thermal conductivity of the coating film, each coating composition was applied to a thickness of 10 mm, dried, and then the thermal conductivity was measured using a laser flash analyzer. The results are shown in Table 2.

Item Experimental Example 1 Comparative Example 1 Thermal conductivity (W/mㅇk) 0.271 0.348

As can be seen from Table 2, Experimental Example 1 according to the present invention had a much lower thermal conductivity than Comparative Example 1.

<Insulation performance evaluation>

The paint was painted on the surface of the steel plate box of a 30cmX30cmX30cm square box, and the internal and external temperatures were measured for 8 hours during internal heating to conduct a thermal insulation performance test, and the results are shown in Table 3.

Time(hr) 0 2 4 6 8 Box inner temperature (℃) 10.1 20.7 35.8 45.1 50.5
Outside temperature of the box (℃) Experimental Example 1 6.5 11 20 29 33 Comparative Example 1 8.1 17.2 29.8 42.1 47.1

As can be seen from Table 3, it can be seen that Experimental Example 1 according to the present invention has superior thermal insulation performance compared to Comparative Example 1, and in particular, it is found that it exhibits more excellent thermal insulation performance when the internal temperature is high. I can.

<Evaluation of heat shielding performance>

Paint was painted on the steel plate, exposed to sunlight between 1 and 2 pm, when direct sunlight is strong in summer, and then the air temperature and the surface temperature of the coating film were checked. The results are shown in Table 4.

Elapsed time 30 minutes 60 minutes 90 minutes Experimental Example 1 Waiting 32.5 33.0 32.1 surface 32.6 34.7 33.9 Comparative Example 1 Waiting 32.5 33.0 32.1 surface 36.4 40.6 39.2

As can be seen from Table 4, Experimental Example 1 according to the present invention has excellent heat shielding performance compared to Comparative Example 1.

<Adhesion evaluation>

The coating film of Test Example 1 was drawn into 100 grids at 1 mm intervals to measure the degree of peeling. The results are shown in Table 5.

Item Experimental Example 1 Experimental Example 2 Adherence 100/100 100/92

* 100/100 the best ∼ 100/0 the worst attachment condition

As can be seen from Table 5, Experimental Example 1 according to the present invention has significantly superior adhesion compared to Comparative Example 1.

Claims (3)

35 to 60 parts by weight of an aqueous binder;
5 to 20 parts by weight of an inorganic heat insulating agent;
3 to 15 parts by weight of hollow ceramic beads;
3 to 10 parts by weight of hollow nanofibers; And
Including water;
The inorganic insulating agent includes aluminum oxide, titanium dioxide, calcium carbonate, diatomaceous earth, pearlite, expanded vermiculite, and volcanic ash having an average particle size of 20 to 60 μm,
The hollow ceramic beads are at least one selected from the group consisting of borosilicate glass, aluminosilicate, and silicate having an average particle size of 15 to 60 μm.
The method of claim 1,
The aqueous binder is an acrylic emulsion, an acrylic-silicone emulsion, a polyurethane-based emulsion, characterized in that it comprises a 1: 1: 1 weight ratio of the heat insulating coating composition.
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