KR20060005924A - The aqueous coating composition - Google Patents

Abstract

The present invention relates to a water-soluble coating composition, and more particularly, in a conventional coating composition, using a hydrophilic resin as a resin component, and containing a predetermined amount of phytoncide, which is a natural substance obtained from a plant, the physical properties are equivalent to those of a conventional coating composition. While maintaining the above, since the continuous deodorization and antimicrobial effect is efficiently carried out relates to a water-soluble coating composition that can be applied to all living spaces, such as building materials, the interior of the vehicle, the windowless interior.

Hydrophilic Resin, Phytoncide, Water Soluble, Paint

Description

The aqueous coating composition

The present invention relates to a water-soluble coating composition, and more particularly, in a conventional coating composition, using a hydrophilic resin as a resin component, and containing a predetermined amount of phytoncide, which is a natural substance obtained from a plant, the physical properties are equivalent to those of a conventional coating composition. While maintaining the above, since the continuous deodorization and antimicrobial effect is efficiently carried out relates to a water-soluble coating composition that can be applied to all living spaces, such as building materials, the interior of the vehicle, the windowless interior.

Recently, the importance of In door Air Quality (IAQ) in indoor space, called 'Sick House Syndrome', has emerged as a topic of new environmental issues at home and abroad. The interior space is limited and occupies more than 80% of human life, but there is a limit to the lack of environmental regulation and awareness. Indoor air is contaminated by various volatile organic compounds (VOCs) produced by building materials and artificial facilities, such as building materials and paints, which are used in the construction of new and old buildings. As the polluted air continues to circulate, its concentration is rapidly increasing. As an alternative, periodic ventilation is important, but above all, more active methods such as elimination, replacement or improvement of sources are required.

As a general method, studies on photocatalyst compositions having the removal of harmful substances and the antibacterial effect using light and various products containing such photocatalyst compositions [Korea Patent Publication No. 2001-100052, Korea Patent Publication No. 2003-85108, Korea Patent registration No. 3954264] is more active than ever. However, these catalysts have been pointed out that the reaction is performed only under limited conditions in which light, i.e., ultraviolet light, is present, so that the reaction is not formed in a dark room or in the absence of light, and thus the effect of the catalyst cannot be obtained.

With these shortcomings, a new 'air catalyst' has recently been proposed as a new alternative to decompose harmful substances and to carry out antimicrobial activities by oxidation of oxygen and water in the air, with or without light. Titanium phosphate compound, which is the main component of the air catalyst, is milder than titanium photocatalyst, which is the main component, and has little oxidative degradation performance against solids. Recently, it is a material suitable for removing volatile organic compounds such as formaldehyde emitted from building materials and indoors. However, since the air catalyst of the titanium phosphate compound is not uniformly applied to the substrate, the durability of the reaction is lowered, so there is an effect on instant deodorization, but there is an effective limit to sterilization, antibacterial, etc. requiring a continuous reaction. In addition, the photocatalyst and the air catalyst are formed by performing a reaction using a chemical material, there is a problem that is not natural friendly.

Thus, the present inventors made an effort to develop a water-soluble coating composition expressing a continuous effect regardless of the reaction conditions, using environmentally friendly materials as described above. As a result, a hydrophilic resin is used as a resin component in a conventional water-soluble coating composition, and a certain amount of phytoncide obtained from a plant is contained, so that the physical properties are kept equal to or higher than the existing coating composition, and the shielding odor emitted by the paint itself is continuously maintained. It was found that the antimicrobial effect and to complete the present invention.

Accordingly, an object of the present invention is to provide an environmentally friendly water-soluble paint composition and a paint containing the same, which perform a continuous deodorizing and antibacterial action.

The present invention is a water-soluble coating composition comprising a hydrophilic resin and a dispersant for aqueous dispersion, 15 to 30% by weight of the hydrophilic resin, 0.1 to 8% by weight of phytoncide, and titanium dioxide, kaolin, aluminum silicate, heavy calcium and talc The characteristic is in the water-soluble coating composition which consists of 60-80 weight% of 1 type, or 2 or more types of inorganic fillers chosen from powder.

When explaining the invention in more detail as follows.

The present invention relates to a water-soluble coating composition that continuously expresses the deodorizing and antimicrobial effects without the restriction of specific conditions. Conventional water-soluble coating compositions have been prepared by using various chemical components or by adding a catalytic material in order to perform the antibacterial action and masking of the odor due to the resin component itself or the mixed chemical components. However, these chemicals are not harmful to humans because they have the above effects by chemical reactions. Furthermore, since they require specific conditions in the reaction, there are limitations in the expression of effects. On the other hand, the water-soluble coating composition of the present invention contains a certain amount of phytoncide, which is a component secreted for the defense purpose of the plant, can continuously express the deodorizing and antibacterial effect without performing the reaction, and also in the last production of water-soluble coating There are no special constraints as it can be prepared by a simple process of adding to it. Moreover, the water-soluble coating composition of this invention shortens a drying time using hydrophilic resin as a resin component, and also adds the effect at the time of construction.

Referring to the configuration of the water-soluble coating composition used in the present invention in more detail as follows.

First, the resin component is not particularly limited to a hydrophilic resin having hydrophilic properties and having a short drying time even at room temperature. For example, acrylic resins, epoxy resins, urethane resins, silicone resins and the like can be selected and used.

The hydrophilic resin is preferably used 15 to 30% by weight (based on the solid content), and if the amount is less than 15% by weight, there is a problem in that adhesive strength, washing power and durability are deteriorated. Since the content is lowered, there is a problem in expressing the desired effect.

The present invention has the feature of the technical configuration in the use of phytoncide added in a certain component ratio in order to express a continuous deodorizing and antibacterial effect. Phytoncide is a combination of Phyton (plant) and Greek (Cidet), which means 'plant' and 'killing'. It means 'sterilizing substance secreted by plants'. Leningrad University in 1930 Professor BP Tokin discovered that odorous substances from garlic and onion pines killed protozoa, such as amoeba, typhoid fever, dysentery, and tuberculosis bacteria. It is known. These phytoncides protect themselves from pests, microorganisms, and environmental changes around them, just as there are tools to protect themselves in their own way, such as sharp claws of animals, fast paws, bird wings, hard shells or protective colors of insects. It is a generic term for aromatic antibiotics that are emitted in the air or in the ground for its purpose. The main component is a volatile terpene-based organic compound.

The phytoncide acts as a killer for various pests, germs, molds, bacteria, etc. that threaten itself, and is beneficial to humans. In particular, the phytoncide is naturally absorbed into the human body as a non-chemical synthetic material, and is easily absorbed by humans. It is known to have a number of functions such as antibacterial, deodorant, sedative, and stress relief to selectively kill harmful bacteria, and the effect of phytoncide is only a small part.

The amount of phytoncide released depends on the plant species, climatic conditions and soil conditions. In general, it is known to be abundant in coniferous species, and in particular, cypress has been reported to emit a large amount of phytoncide regardless of season. In the present invention, the phytoncide generated from the cypress is collected and used in a conventional extraction method, and phytoncide commercially available from Envita Co., Ltd. is used.

The phytoncide is used in an amount of 0.1 to 8% by weight (based on solids content), and the amount of the phytoncide is less than 0.1% by weight. It is preferable to maintain the above range because the addition of a large amount may adversely affect the problem of odor.

The water-soluble coating composition of the present invention is aqueous, and is used by mixing 0.1 to 20% by weight (based on solids content) of additives such as dispersants, fillers, thickeners, preservatives, wetting agents, antifoaming agents, pH adjusting agents, and fiber in water as a dispersion medium. , The additive is not particularly limited to conventional components, it is prepared by a conventional method of dispersion mixing using a high speed disperser.

Component content of the additive is 60 to 80% by weight of filler, 2 to 4% by weight of cryoprotectant, 0.1 to 1% by weight of dispersant, 0.1 to 1% by weight of thickener, 0.1 to 1% by weight of preservative, 0.1 to 1% by weight of humectant It is recommended to use about 0.1 to 1% by weight of antifoaming agent, 0.1 to 1% by weight of pH adjuster, 0.01 to 1% by weight of antimicrobial agent and 1 to 6% by weight of fibrin, and when it is out of the above range, it expresses the effect aimed at by this invention. Since it is impossible to maintain the physical properties of the basic water-soluble paint, it is preferable to maintain the above range.

Additives used in the present invention are conventional titanium dioxide, kaolin, aluminum silicate, heavy calcium, talc powder, propenediol, polypropylene sodium, benzisothiazolone, methyl acrylic acid, celluloid, potassium potassium hydroxide, nano silver (nano silver However, the present invention is not limited thereto, and conventional components may be used, and other additives may be added to express other effects without departing from the object of the present invention.

This component is a conventional method of dispersing using a high-speed disperser, first dispersing the dispersant, wetting agent, defoamer, and titanium dioxide in the purified water in a high-speed disperser, and then polished to about 0.1 ~ 0.5 ㎛ in a polisher to purified water Prepare to pour. In addition, after dispersing kaolin, aluminum silicate, heavy calcium carbonate, talc powder, and preservatives using another high speed disperser, the particle size is polished to a maximum of 30 μm in a polishing machine. After dispersing each of the prepared raw materials in a high-speed injector with a rotation speed of 150 ~ 200 rpm / min, and then re-dispersed by mixing the purified water, fiber, pH adjusting agent, the cryoprotectant, pH adjusting agent, hydrophilic resin, thickener, phytoncide Add and disperse. At this time, the pH is adjusted to a pH 8-9, a thickener with a thickening agent to a range in which a conventional coating composition can be formed, and finally, a phytoncide is added to prepare a water-soluble coating composition.

As described above, the water-soluble coating composition according to the present invention contains phytoncide which is a natural material, while maintaining the physical properties equal to or higher than the conventional coating composition while performing deodorization and antibacterial action to continuously shield the odor emitted by the paint itself. Therefore, it is expected to have high utility for indoor construction.

The present invention as described above will be described in more detail based on the following examples, but the present invention is not limited thereto.

Example  One To  3

The water-soluble paints were prepared using the ingredients and contents shown in Table 1 below.

First, the dispersant, the humectant, the antifoaming agent, and the titanium bag were dispersed for 15 minutes in a high-speed disperser of 1150 to 1200 rpm / min in 10 g of purified water, and then polished to about 0.2 μm in a polishing machine. 13.34 g of purified water was poured into the raw material ground above.

In addition, by using another high speed disperser, kaolin, aluminum silicate, heavy calcium carbonate, talc powder, and preservatives are dispersed at a rotational speed of 1150 to 1200 rpm / min for 20 minutes, and then the particle size is polished to a maximum of 30 μm in a polishing machine. Ready.

After dispersing the prepared raw material for 10 minutes in a high-speed injector at a speed of 150 ~ 200 rpm / min, 10 g of purified water, fiber, pH adjuster (20% aqueous potassium hydroxide solution) was redispersed for 5 minutes.

Next, a cryoprotectant, a pH adjuster, a hydrophilic resin, a thickener, and a phytoncide were added and dispersed at a rotation speed of 450 to 500 rpm / min for 10 minutes. At this time, the thickener was used by mixing with water in a ratio of 1: 1, and after adjusting the viscosity in a suitable range with a pH adjuster pH 8-9, a thickener, and finally added a phytoncide to prepare a water-soluble coating composition.

Classification (g) Example 1 Example 2 Hydrophilic resin Latex 559 ¹⁾ 16 16 Phytoncide 0.3 0.4 Dispersant LF ²⁾ 0.4 0.4 Filling Titanium bag R930 ³⁾ 17 16 china clay 7.3 6.0 Aluminum silicate 5.7 6.0 Heavy Potassium Carbonate 11.35 12 Cryoprotectants Propylene glycol 2 3 antiseptic XL2 ⁴⁾ 0.2 0.2 Humectant SM 134 0.2 0.2 fibrin ER-30M 0.2 0.2 pH regulator Potassium hydroxide 0.04 0.04 Antifoam 760 ⁵⁾ 0.23 0.23 Thickener 8990 ⁶⁾ 0.03 0.03 Nano silver 50 ppm 50 ppm water 32.34 33.34 1): styrene-butylacrylate copolymer 2): sodium polypropylene (BK GIULINI CHEMIE CO., LTD) 3): titanium dioxide 4); Procel XL2 (benzisothiazolone) 5); Silicone antifoam 246 (LUBRIZOL DEUTS CHIAND GMBH CO., LTD) 6); Methacrylic acid (BASF (CHINA) COMPANYLIMITED)

Comparative example

In the same manner as in Example 1, but the conventional water-soluble paint without a phytoncide was set as a comparative example.

Experimental Example

The physical properties and antibacterial and deodorant properties of the coating composition prepared in Example 1 and the coating composition of Comparative Example were measured and shown in the following Table 2.

[Measurement of physical properties]

The coating composition prepared above was coated in a conventional manner to form a coating film, and after baking, the physical properties were measured by the following method.

1) Workability: KS M 5000

2) Dry coating condition: KS M 5000

3) Concealment rate: KS M 6010

4) Gloss: KS M 6010

5) repainting test; KS M 5000

6) Softness: KS M 5000

7) Smell: KS M 6010

8) Antibacterial: SHAKE FLASK METHOD KS M 0146-2003

division Example 1 Comparative example Workability Good Good Concealment 0.92 0.90 Glossy (85。) 9 8 Repainting test Good Good Dry coating state Good Good Softness 50 50 smell Good Severe Antimicrobial activity Initial bacterial count 1.3 × 10 ⁵ 1.3 × 10 ⁵ After 24 hours (Bacteria / mL) <10 5.9 × 10 ⁶ Bacterial Reduction (%) 99.9

As shown in Table 2, Example 1 using the addition of the hydrophilic resin and the phytoncide according to the present invention was confirmed to exhibit the physical properties equivalent to or more than the conventional water-soluble paint, and at the same time exhibits antimicrobial properties and odor shielding power.

 As described above, the water-soluble coating composition containing a hydrophilic resin and a phytoncide in a constant mixing ratio according to the present invention is affinity, while maintaining the physical properties as a conventional water-soluble coating, the smell of the paint itself is not only shielded, but also a forest bath It is expected to increase the role as a paint for interior construction with the antibacterial action as in.

Claims (3)

In the water-soluble coating composition comprising a hydrophilic resin and a dispersant for aqueous dispersion, 15 to 30% by weight of the hydrophilic resin, Phytoncide 0.1-8 wt%, A water-soluble coating composition comprising 60 to 80% by weight of one or two or more inorganic fillers selected from titanium dioxide, kaolin, aluminum silicate, heavy calcium and talc. The water-soluble coating composition according to claim 1, wherein the coating composition comprises 0.1 to 20% by weight of an additive selected from a cryoprotectant, a dispersant, a thickener, a preservative, a wetting agent, an antifoaming agent, a pH adjusting agent, an antibacterial agent and a fiber. . The water-soluble coating composition of claim 2, wherein the antimicrobial agent is nano silver.