KR20230044685A - water paint for deck wood and painting method of deck wood using it - Google Patents

Abstract

The present invention relates to a water-based paint for deck wood to provide stain resistance and durability, and a deck wood painting method using the same. According to the present invention, the water-based paint for deck wood comprises water, coloring pigment, inorganic extender, a film forming agent, preservative, an antibacterial agent, a thickener, and a binder. The binder includes 25 to 34 wt% of acrylic emulsion, 15 to 24 wt% of water-dispersed urethane, and 7 to 13 wt% of inorganic nanoceramics with respect to the total composition of the paint. Accordingly, the water-based paint for deck wood provides excellent water resistance, is unlikely to cause peeling of a paint layer, and has excellent durability and abrasion resistance.

Description

Water-based paint for deck wood providing stain resistance and durability and a painting method for deck wood using the same {water paint for deck wood and painting method of deck wood using it}

The present invention relates to a water-based paint for deck wood, which is environmentally friendly and provides stain resistance and durability so that the flexibility and strength of the paint film, heat resistance, stain resistance and flame retardancy are excellent compared to oil-based paint, and a deck using the same It is about the painting method of wood.

Acrylic resin is a polymer with excellent physical properties such as transparency, durability, heat resistance, oxidation resistance, and adhesiveness, and is one of the most commonly used polymer resins.

It is widely used in various fields of the manufacturing industry, such as paints, inks, adhesives, coating agents for various films, and pressure-sensitive adhesives.

As for binders used for wood, oil based oils and alkyd resins have been generally used so far, and water based binders have rarely been used.

The wood binder currently used in Korea is an oil-based binder and contains a large amount of petroleum solvent, which causes air pollution by volatilization during painting work, high fire risk and odor, causing many problems to the health and safety of workers. cause.

Therefore, there is an increasing demand for the development of water-based binders for wood to solve various problems of oil-based binders applied to wood.

As a related technology, "Aqueous inorganic binder containing liquid silicate salt and coating composition using the same" (Korean Patent Publication No. 10-2000-0067313, Patent Document 1) is stabilized by adding a certain amount of liquid silicate to an acidic salt aqueous solution. A technology that is environmentally friendly due to not using an organic solvent and provides flame retardancy when applied to wood has been disclosed.

In addition, "Natural Water-Based Paint Composition and Manufacturing Method Thereof" (Korean Patent Registration No. 10-1254579, Patent Document 2) discloses a composition of a paint composition using non-toxic ceramics and a water-soluble organic binder as raw materials.

On the other hand, in the "paint composition for top coating of wood" (Korean Patent Publication No. 10-1726936, Patent Document 3), which enables easy work by shortening the curing time and enhances the strength of wood after curing, water, acrylic Compositions including copolymers, urethane resins, solvents, and the like are also disclosed.

By the way, the acrylic emulsion binder can increase the strength and durability of the coating film, but at a temperature of about 60 to 70 ° C., the strength of the coating film is somewhat weakened, and there is a problem of contamination resistance to which foreign substances and fine dust adhere.

In addition, in the case of various inorganic materials used to increase heat resistance, contamination resistance, etc., there is a problem in that a choking phenomenon occurs quickly when an excessive amount is added.

In particular, the deck rod system is not located in a private living area, but is used by a large number of people such as trails, hiking trails, waterside parks, etc. It should be high, and the drying rate after painting is required more quickly, so it is more necessary to develop a paint suitable for painting deck wood applied to a deck rod system.

KR 10-2000-0067313 (2000.11.15) KR 10-1254579 (2013.04.09) KR 10-1726936 (2017.04.07)

The water-based paint for deck wood providing stain resistance and durability of the present invention and the painting method for deck wood using the same are intended to solve the problems that occur in the prior art, and have excellent water resistance and easily drop off the paint layer. It is not, and it is intended to provide a water-based paint for deck wood having excellent durability and excellent wear resistance.

In order to solve the above problems, the water-based paint for deck wood providing stain resistance and durability of the present invention is composed of water, color pigment, inorganic extender pigment, film forming agent, preservative, antibacterial agent, thickener and binder. , The binder is characterized in that 25 to 34% by weight of acrylic emulsion, 15 to 24% by weight of water-dispersed urethane, and 7 to 13% by weight of inorganic nanoceramic are mixed in the total composition of the paint.

In the above configuration, the color pigment is included in 7 to 11% by weight of the total composition, the inorganic extender pigment is included in 3 to 11% by weight of the total composition of the paint, and the film forming agent is included in the total composition of the paint 1.5 to 3% by weight, the preservative is included in 0.1 to 0.5% by weight of the total composition of the paint, the antibacterial agent is included in 0.2 to 1% by weight of the total composition of the paint, and the thickener is included in the total composition of the paint It is characterized in that it contains 1 to 3% by weight.

In the above configuration, it is composed of a particle size of 80 to 100 neck (目), characterized in that it further comprises 40 to 80 parts by weight of silica sand based on 100 parts by weight of the paint.

The coating method for deck wood using a water-based paint for deck wood that provides stain resistance and durability of the present invention is a transparent urethane water-based binder having a solid content of 12 to 13% by weight when newly painted on unpainted deck wood. A pre-treatment step of removing and washing foreign substances on the surface of the wood when painting the surface of the wood and performing repair painting on the deck wood that has been previously painted; A first painting step of painting the paint on the surface of the pretreated deck timber; It is configured to include; a second painting step of painting the paint after 2 hours or more after the first painting.

In the above configuration, an additional painting step of applying the paint of claim 3 between the pretreatment step and the first painting step and drying it for 3 hours or more to impart abrasion resistance is further included to fix the coating layer including silica sand, It is characterized in that made to alleviate the irregularities of.

According to the present invention, there is provided a water-based paint for deck wood, which has excellent water resistance, does not easily drop off the paint layer, has excellent durability, and has excellent abrasion resistance.

1 is a table showing the physical properties of the paint of Example 1;
Figure 2 is a schematic cross-sectional view showing an example of a coating method for imparting wear resistance to the bottom surface.

The present invention is composed of water, color pigment, inorganic extender pigment, film forming agent, preservative, antibacterial agent, thickener and binder, wherein the binder is 25 to 34% by weight of the acrylic emulsion, 15 to 24% by weight of the total paint composition % of water-dispersed urethane and 7 to 13% by weight of inorganic nano-ceramic.

This is differentiated from the use of acrylic binders as binders for conventional water-based paints for construction. The hybrid binder, which is a mixture of acrylic emulsion, water-dispersible urethane, and inorganic nano-ceramic, improves the durability, water resistance and stain resistance of paints, and improves the flexibility of the paint film. and strength, heat resistance, and flame retardancy are improved.

Acrylic emulsion serves to increase the strength and durability of the coating film.

However, at a temperature of 60 to 70 ° C., the strength of the coating film is somewhat weakened, and foreign matter and fine dust are adhered to and contaminated.

Water-dispersed urethane has high coating strength at a relatively high temperature, flexibility, and non-adhesive properties such as foreign substances.

On the other hand, the inorganic nano-ceramic increases the strength of the coating film and imparts heat resistance, flame retardancy and contamination resistance.

However, when an excessive amount of inorganic nano-ceramic is added, choking occurs quickly.

In view of this, 25 to 34% by weight of acrylic emulsion is included, 15 to 24% by weight of water-dispersed urethane, and 7 to 13% by weight of inorganic nano-ceramic are included based on the total composition of the paint.

If the amount of inorganic nanoceramic is less than 7% by weight, the effect of enhancing the strength of the coating film, heat resistance, flame retardancy, and stain resistance is insufficient, and if it exceeds 13% by weight, choking occurs quickly.

If the water-dispersed urethane is less than 15% by weight, non-tackiness and flexibility are deteriorated, and it is preferable to add 15% by weight or more, but there is no difference in weather resistance from acrylic emulsion.

Any one of nano colloidyl silicate silica sol, nano aluminum silicate, nano sodium silicate, nano potassium silicate, and nano alumina powder may be selected as the inorganic nano ceramic.

Various organic and inorganic pigments may be used as the color pigment, and pigments such as iron oxide red, iron oxide black, and carbon black, which do not contain harmful heavy metals, may be used for brown.

These color pigments are preferably included in an amount of 7 to 11% by weight of the total composition of the composition.

Inorganic extender pigments can be used as raw materials such as talc, calcium carbonate, aluminum nitride, alumina, etc., and are preferably included in 7 to 11% by weight of the total composition of the paint.

The film formation agent is used for the purpose of forming a uniform surface film, and may be composed of a high boiling point alcoholic solvent such as 2,2,4-trimethyl-1,3-pentanediol isobutyrate (Texanol), and the entire paint It is preferable to include 1.5 to 5% by weight of the composition.

The preservative serves to secure storage stability at room temperature, and is preferably included in an amount of 0.1 to 1% by weight of the total composition of the paint.

The antibacterial agent is added to impart anti-fungal performance and may be composed of azo-based or imidazole-based additives, etc., and is preferably included in an amount of 0.2 to 1% by weight of the total composition of the paint.

The thickener serves to prevent flow by increasing the viscosity of the paint composition, and a thickener such as a cellulose-based thickener may be used, and it is preferably included in 1 to 3% by weight of the total composition of the paint.

The antifoaming agent is for forming an even coating film by suppressing bubbles in the subject, and may be used in polysiloxane-based mixtures, silicone-based, and the like.

In addition, since the wood for the floor used in the deck requires more wear resistance, particles for imparting wear resistance may be added to the paint.

Particles for this include silica sand or polyethylene wax powder.

More preferably, it consists of a particle size of 80 to 100 neck, and 40 to 80 parts by weight of silica sand based on 100 parts by weight of the paint is suitable.

In the method of painting by including silica sand particles, first, silica sand particles are mixed with paint and applied to form a wear-resistant coating film, and then a paint without silica sand is applied to fix the silica sand layer, and the unevenness of the silica sand is alleviated to achieve wear resistance and slippage. It can further enhance the prevention function.

A method of coating the paint having the above configuration will be described as follows.

1. Preprocessing step

In the case of new painting on unpainted deck wood, a transparent acrylic emulsion having a solid content of 12 to 13% by weight and a urethane aqueous binder are applied to the surface of the deck wood as a primer.

Painting is carried out using a brush or roller, the amount required is about 0.2kg/㎡, and the re-coating time is set at 2 hours.

When performing repair painting on deck wood that has been previously painted, remove foreign substances on the wood surface and wash it.

2. 1st painting step

The paint is firstly painted on the surface of the pretreated deck wood.

Painting is carried out using a brush, roller, or spray, and the required amount is about 0.2 kg/㎡, and the re-coating time is set at 2 hours.

3. 2nd painting step

After 3 hours or more after the first coating, the second coating is applied.

Painting is carried out using a brush, roller, or spray, and the required amount is about 0.2 kg/㎡, and the re-coating time is set at 2 hours.

In the above configuration, 40 to 80 parts by weight of silica sand (80 to 100 目 size) is mixed with 100 parts by weight of the paint as described above for the part that needs to have higher abrasion resistance, preferably the part to be used as a flooring material, An additional painting step of painting between the pretreatment step and the first painting step may further proceed.

In the case of additional painting, a brush or roller is also used, and the required amount is about 0.3 kg/㎡, and the re-coating time is set at 2 hours.

Figure 2 shows a cross section of painting according to the application of this method as a conceptual diagram.

As can be seen from the drawing, a pre-treatment coating layer (2) coated with a transparent urethane water-based binder is formed on the top of the wood (1), and an additional coating layer (3) according to the coating of a paint containing silica sand particles (6) is formed thereon ) can be seen to be formed.

In addition, a primary coating layer 4 and a secondary coating layer 5 are formed on the top thereof by primary and secondary coating.

In this way, the additional coating of coating the silica sand-containing paint to impart wear resistance between the pretreatment step and the first coating first forms an additional coating layer (3), which is an abrasion resistant coating, on the pretreated wood surface, and then By forming the first coating layer 4 and the second coating layer 5, which are coating films by the first and second coating, the silica sand particles 6 are fixed and the unevenness of the silica sand particles 6 is alleviated to improve abrasion resistance and sliding It is to enable the prevention function to be maintained for a long time.

Hereinafter, embodiments of the present invention will be described.

As shown in Table 1 below, raw materials were mixed and mixed in a mixer for 3 hours to prepare a paint.

composition Formulation (% by weight) note acrylic emulsion 30 water dispersion urethane 20 Inorganic nano ceramics 10 Nanosilicate, liquid silicate system coloring pigment 9 iron oxide red, carbon black Inorganic extender pigment 4 Talc, Calcium Carbonate film forming agent 2.5 Texanol antiseptic 0.2 antibacterial 0.3 Azo, imidazole thickener 2 Cellulose-based antifoam 0.2 silicon based Other additives 0.8 water 21 Sum 100

The physical properties of the paint prepared in Example 1 are shown in FIG.

100 parts by weight of the paint was prepared, silica sand having a particle size of 80 was weighed, and 60 parts by weight was prepared and mixed to prepare a paint.

In order to compare with the above example, the paint of the comparative example was prepared by preparing and mixing raw materials with the composition shown in Table 2 below.

composition Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 acrylic emulsion 26 39 30 43 40 40 water dispersion urethane 18 16 14 12 10 10 Inorganic nano ceramics 10 10 10 10 6 14 coloring pigment 9 9 9 9 9 9 Inorganic extender pigment 4 4 4 4 4 4 film forming agent 2.5 2.5 2.5 2.5 2.5 2.5 antiseptic 0.2 0.2 0.2 0.2 0.2 0.2 antibacterial 0.3 0.3 0.3 0.3 0.3 0.3 thickener 2 2 2 2 2 2 antifoam 0.2 0.2 0.2 0.2 0.2 0.2 Other additives 0.8 0.8 0.8 0.8 0.8 0.8 water 27 16 27 16 25 17 Sum 100 100 100 100 100 100

Experiments were conducted on the prepared examples and comparative examples as follows.

<Experimental Example 1> Water resistance test

The examples and comparative examples prepared on wood were painted with a brush, dried at room temperature for 3 days, and then immersed in water for 7 days. Table 3 shows.

division Expansion of the coating film discoloration Example 1 X X Example 2 X X Comparative Example 1 △ X Comparative Example 2 X △ Comparative Example 3 △ △ Comparative Example 4 △ △ Comparative Example 5 ○ ○ Comparative Example 6 △ △

(X: No swelling, no change in color, △: Medium, ○: Swelling a lot, color change a lot)

As shown in Table 3, it was found that the examples did not swell or change color, whereas the comparative examples did not swell or discolor.

<Experimental Example 2> Non-adhesion test

After painting the paint of Examples and Comparative Examples on wood twice, drying it at room temperature for 3 days, putting it in a drying furnace, placing soft toilet paper on the painted surface of the wood, pressing it with a 1kg weight and fixing it, and then raising the temperature to 150 ° C. It is shown in Table 4 by checking whether it does not stick or not.

division Whether the toilet paper is dripping Example 1 ○ Example 2 ○ Comparative Example 1 △ Comparative Example 2 X Comparative Example 3 △ Comparative Example 4 △ Comparative Example 5 X Comparative Example 6 △

(X: not falling, △: slightly falling, ○: falling well)

As shown in Table 4, it can be seen that the paints of the examples do not adhere well to foreign substances compared to the comparative examples.

<Experimental Example 3> Crack measurement experiment according to temperature change

The paints of Examples and Comparative Examples were painted on wood, dried at room temperature for 3 days, and then the wood was stored in an oven set at 60 ° C and a freezer set at minus 15 ° C 5 times for one day each, then taken out and cracked on the painted surface. Whether or not this occurred was visually measured and shown in Table 5.

division cracks in the paintwork Example 1 X Example 2 X Comparative Example 1 X Comparative Example 2 △ Comparative Example 3 △ Comparative Example 4 △ Comparative Example 5 ○ Comparative Example 6 △

(X: No cracks, △: Slight cracks, ○: Severe cracks)

As shown in Table 5, the paints of the examples did not crack due to temperature change compared to the comparative examples.

<Experimental Example 4> Comparative wear test

The paints of Examples and Comparative Examples were first coated on the steel specimen by spraying, dried at 60 ° C for 30 minutes, then second coated, then dried again at 60 ° C for 30 minutes, and then the tester was rotated at 70 rpm with a load of 1 kg. By rotating 2,000 times at a speed, the amount of rubbed surface was measured and shown in Table 6 below.

In Example 3, the paint was applied by using the paint of Example 2 for the first coating and the paint of Example 1 for the second coating.

At this time, an oil-based acrylic paint was purchased on the market, and 60 parts by weight of silica sand was added based on 100 parts by weight of the paint during the first coating, and only the paint was painted during the second coating, which was defined as Comparative Example 7.

In addition, an oil-based epoxy paint was purchased on the market, and silica sand was added in an amount of 60 parts by weight based on 100 parts by weight of the paint during the first coating, and only the paint was coated during the second coating, which was defined as Comparative Example 8.

However, Comparative Example 8 was treated with a drying temperature of 100 ° C. according to product characteristics during secondary drying.

division Abrasion amount (unit: g) Example 1 0.086 Example 2 0.063 Example 3 0.051 Comparative Example 1 0.103 Comparative Example 2 0.116 Comparative Example 3 0.993 Comparative Example 4 0.107 Comparative Example 5 0.103 Comparative Example 6 0.114 Comparative Example 7 0.069 Comparative Example 8 0.064

Looking at the experimental results of Examples 1 and 2, it can be seen that the examples have significantly less wear compared to Comparative Examples 1 to 6.

In addition, when comparing Example 3 in which silica sand was added to the coating once and Comparative Examples 7 and 8, it can be seen that Example 3 has a significantly smaller amount of abrasion.

<Experimental Example 5> Stacking test

After painting the paints of Examples and Comparative Examples on wood with a brush, drying at room temperature for 4 hours, the dried wood was stacked vertically and stored at room temperature for 3 days.

Then, the contact parts of the wood were visually observed to determine whether the painted surfaces were sticking to each other, and shown in Table 7 below.

division Degree to which the paint surface sticks Example 1 X Example 2 X Comparative Example 1 △ Comparative Example 2 ○ Comparative Example 3 △ Comparative Example 4 △ Comparative Example 5 ○ Comparative Example 6 △

(X: not sticky, △: slightly sticky, ○: very sticky)

As shown in Table 7, the examples showed that the painted surface did not stick well after drying.

1 : Wood
2: pre-treatment coating layer
3: additional coating layer
4: 1st coating layer
5: 2nd coating layer
6: silica sand particles

Claims (5)

In the water-based paint for deck wood,
It is composed of water, color pigment, inorganic extender pigment, film forming agent, preservative, antibacterial agent, thickener and binder,
Characterized in that the binder is composed of a mixture of 25 to 34% by weight of acrylic emulsion, 15 to 24% by weight of water-dispersed urethane, and 7 to 13% by weight of inorganic nanoceramic of the total composition of the paint,
A water-based paint for deck wood that provides stain resistance and durability.
According to claim 1,
The coloring pigment is contained in 7 to 11% by weight of the total composition,
The inorganic extender pigment is contained in 73 to 11% by weight of the total composition of the paint,
The film forming agent is included in 1.5 to 3% by weight of the total composition of the paint,
The preservative is contained in 0.1 to 1% by weight of the total composition of the paint,
The antimicrobial agent is contained in 0.2 to 1% by weight of the total composition of the paint,
Characterized in that the thickener is contained in 1 to 3% by weight of the total composition of the paint,
A water-based paint for deck wood that provides stain resistance and durability.
According to claim 2,
It consists of a particle size of 80 to 100 neck (目), characterized in that it further comprises 40 to 80 parts by weight of silica sand based on 100 parts by weight of the paint,
A water-based paint for deck wood that provides stain resistance and durability.
In the coating method of deck wood,
In the case of new painting on unpainted deck wood, in case of painting the surface of deck wood with a transparent urethane water-based binder with a solid content of 12 to 13% by weight, and in case of repair painting on deck wood that has been previously painted, the wood surface A pretreatment step of removing foreign substances and washing;
A first painting step of painting the paint of any one of claims 1 to 2 on the surface of the pretreated deck timber;
A second painting step of painting the paint of any one of claims 1 to 2 after 3 hours or more after the first painting; configured to include,
Deck wood painting method using water-based paint for deck wood that provides stain resistance and durability.
According to claim 4,
Between the pretreatment step and the first painting step, an additional painting step of applying the paint of claim 3 and drying it for 3 hours or more to impart abrasion resistance is further included to fix the coating layer including silica sand and alleviate irregularities of the silica sand. characterized in that it consists of
Deck wood painting method using water-based paint for deck wood that provides stain resistance and durability.

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