KR101554027B1 - Functional paint compositions - Google Patents

Abstract

The present invention relates to a functional coating composition, and more specifically, to a functional coating composition having excellent harmful substance removing ability, deodorant properties, antimicrobial properties, anti-fungal properties, and moisture absorption performance. To the total weight of the functional coating composition, the functional coating composition includes, with respect to the total weight of a coating composition: 20-50 wt% of an acrylic binder; 3-20 wt% of functional materials; 0.5-10 wt% of harmful substance removing agents; 10-25 wt% of pigments; 20-35 wt% of diatomaceous soil; 1-2 wt% of a fluorine coating agent; 0.1-1.0 wt% of biocides; 5-25 wt% of other additives; and water for the remaining part.

Description

FUNCTIONAL PAINT COMPOSITIONS [0001]

TECHNICAL FIELD The present invention relates to a functional coating composition, and more specifically, to a functional coating composition having excellent ability to remove toxic substances, deodorization, antimicrobial activity, antifungal properties, and moisture absorptive and desorptive properties.

Recently, a home or office has been increasing the air tightness of the room for the efficiency of the heating and cooling of the residential space. In such an airtight residential space, natural ventilation is not smooth, dust accumulates in the room, and various bacteria, fungi, mites and the like are proliferated. These are known as factors that cause allergic symptoms such as atopic dermatitis, bronchial asthma and allergic rhinitis.

In addition, volatile organic compounds (VOC) such as formaldehyde, formalin, xylene, toluene and the like which are scattered from various building materials, paints of wall construction, Which is not completely discharged. These volatile organic chemicals (VOCs) cause pain in the body in contact with air, such as the eyes and throat. And, if the humidity control and deodorizing function are not satisfied, molds are likely to occur, and these fungi cause environmental diseases such as rhinitis and asthma.

In addition, since the regulations on the housing construction standards have recently been revised as of May 6, 2013, the criteria for the construction of clean health housing have been expanded from 7 to 9, It is getting tighter.

Korean Patent No. 10-1041123 discloses a multifunctional volatile organic compound adsorption coating composition comprising a water-soluble acrylic resin and a silane compound and a process for producing the same.

Japanese Patent Laid-Open No. 2003-336374 discloses a wall-paint composition comprising bamboo charcoal, a binder and a pigment.

However, most conventional paints have only functionalities, and most of them do not have durability, surface texture and gloss, and workability. Therefore, a paint that satisfies the criteria for building a clean health home while having functionality is required.

SUMMARY OF THE INVENTION The present invention has been devised to solve the problems described above, and it is an object of the present invention to provide a functional coating composition having surface functionalities, antibacterial / antifungal properties, moisture absorptive and desorptive properties, deodorization properties and volatile organic chemical adsorption properties.

The above object of the present invention is attained by a coating composition comprising 20 to 50% by weight of an acrylic binder, 3 to 20% by weight of a functional material, 0.5 to 10% by weight of a harmful substance remover, 10 to 25% by weight of a pigment, 20 to 35% 1 to 2% by weight of a coating agent, 0.1 to 1.0% by weight of an antimicrobial agent, 5 to 25% by weight of other additives, and a residual amount of water.

Preferably, the acrylic binder is a water-dispersed acrylic ester copolymer having a viscosity of from 3,000 to 4,000 cps (25 DEG C).

Preferably, the harmful substance remover may be at least one member selected from the group consisting of urea, amine, ammonium salt and adipic acid dihydrolazide. Particularly preferably, the harmful substance removing agent comprises 0.1 to 5% by weight of urea, 0.1 to 5% ~ 2 wt%, ammonium salt 0.1 ~ 1.5 wt%, and adipic acid dihydrazide 0.1 ~ 1.5 wt%.

Preferably, the functional inorganic material may be at least one selected from the group consisting of ilite, zeolite, elvan, jade, loess, calcium carbonate, and nano silver.

Preferably, the other additives may be at least one selected from the group consisting of a thickener, a preservative, a cryoprotectant, a dispersant, a defoamer, and a nonionic emulsifier.

INDUSTRIAL APPLICABILITY The functional coating composition of the present invention can remove acetaldehyde and is excellent in deodorizing property, can purify indoor air, and can suppress the propagation of bacteria and fungi, thereby providing a comfortable living environment. In addition, the present invention is excellent in moisture absorptive and desorptive properties and can improve the service life of the coating material because no foreign substance is applied to the surface.

Unless defined otherwise, all technical terms used in the present invention have the following definitions and are consistent with the meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Also, preferred methods or samples are described in this specification, but similar or equivalent ones are also included in the scope of the present invention. The contents of all publications referred to herein are incorporated herein by reference. The term " drug " is used in reference to a reference amount, level, value, number, frequency, percentage, dimension, size, amount, weight, or length of 30, 25, 20, 25, 10, 9, 8, 7, 6, Level, value, number, frequency, percentage, dimension, size, quantity, weight or length of a sample,

Throughout this specification, the words " comprising " and " comprising ", unless the context clearly requires otherwise, include the steps or components, or groups of steps or elements, And that they are not excluded.

The present invention relates to a coating composition comprising 20 to 50% by weight of an acrylic binder, 3 to 20% by weight of a functional material, 0.5 to 10% by weight of a harmful substance remover, 10 to 25% by weight of a pigment, 20 to 35% 1 to 2% by weight of a fluorine coating agent, 0.1 to 1.0% by weight of an antimicrobial agent, 5 to 25% by weight of other additives, and a residual amount of water (preferably 5 to 30% by weight).

The binder in the above may preferably be an acrylic binder. The acrylic binder may be a water-soluble acrylic binder, preferably an aqueous acrylic ester copolymer (solid content 47 to 49% by weight). Preferably, the acrylic binder has a viscosity of 3,000 to 4,000 cps (25 DEG C). The acrylic binder has a very low content of volatile organic substances, hardly releases harmful substances, and has almost no odor. The binder is preferably 20 to 50% by weight based on the total weight of the coating composition. When the amount is less than 20% by weight, the viscosity is low and the adhesive strength is low. When the amount is more than 50% by weight, the viscosity is excessively high and workability is deteriorated.

The functional material may be at least one selected from the group consisting of ilite, jade, calcium carbonate, loess, zeolite, elvan, and nano silver. The functional material may be contained in an amount of 3 to 20% by weight based on the total weight of the coating composition. If it is less than 3% by weight, it is difficult to exhibit a desired function, and when it exceeds 20% by weight, it affects the viscosity of the paint itself, thereby deteriorating the workability.

Illite (illite) above is a mica-group minerals belonging to the monoclinic system, the general formula _{(K, H 3 O) (} Al, Mg, Fe) 2 (Si, Al) 4 O 10 [(OH) 2, (H 2 O)]. The daily light component emits a large amount of far-infrared rays and anions at room temperature to deodorize the odor of the room air, absorbs and removes volatile organic chemicals, and has antibacterial properties. The zeolite has a humidity control function, that is, a function of controlling the humidity by absorbing moisture contained in the indoor air.

In the above, ilite and zeolite may be calcined at 800 to 1200 DEG C for finely pulverized particles having a size of 2 to 18 mu m. The oxide may be made of _{SiO 2, Al 2 O 3,} Fe 2 O 3, CaO 3, MgO, Ig-loss. The calcium carbonate is used for improving the hiding power and controlling the film thickness, and functions as an extender pigment and improves storage stability, saturation and plasticity. The nano silver silver particles having a particle size of 5 to 500 nm may be used, and when the coating composition contains 0.1 to 1% by weight, an excellent antibacterial effect can be imparted.

According to one embodiment of the present invention, the functional material may include 5.0 to 6% by weight of calcium carbonate, 1 to 2% by weight of jade and 2 to 3% by weight of ilite.

The harmful substance removing agent may be at least one selected from the group consisting of Urea, Amines, Ammonium Salt and Adipic Acid Dihydrazide (ADH). The harmful substance removing agent is preferably 0.5 to 10% by weight based on the total weight of the coating composition. When the harmful substance removing agent is contained in an amount of less than 0.5% by weight, it is difficult to remove the volatile organic compound, and when it exceeds 10% by weight, the manufacturing cost increases.

The harmful substances include formaldehyde, volatile organic chemicals (VOC), and the like. Volatile organic chemicals can be benzene, toluene, xylene and heavy metals such as lead, chromium, arsenic and cadmium. The harmful substance removing agent can purify indoor air by not only adsorbing but also removing harmful substances. According to one embodiment of the present invention, the harmful substance removing agent may contain 0.1 to 5% by weight of urea, 0.1 to 2% by weight of amine, 0.1 to 1.5% by weight of ammonium salt and 0.1 to 1.5% by weight of adipic acid dihydrazide %.

The pigment may be a pigment generally used in the coating composition. Preferably, titanium can be used. The pigment may comprise 10 to 25% by weight based on the total weight of the coating composition.

The coating composition of the present invention is characterized by containing diatomaceous earth. In the present invention, diatomaceous earth is included to impart a harmful substance adsorbing property and a deodorizing property, and the moisture absorptive and desorptive property is improved. In the present invention, a high quality diatomaceous earth containing silicon dioxide as a main component can be used. The diatomaceous earth preferably comprises 20 to 35% by weight based on the total weight of the coating composition. When the diatomaceous earth is less than 20% by weight, the adsorptivity and the deodorization performance are low. When the diatomite is more than 35% by weight, adhesion performance to the wall surface may be deteriorated.

The fluorine coating agent can lower the surface tension and form a smooth coating film so as not to bury foreign substances, and can block the absorption of water. As a result, it is possible to impart gloss to the surface of the paint after application and to improve durability. The fluorine-containing coating agent is preferably 1 to 2% by weight based on the total weight of the coating composition. The fluorine coating agent may be a fluorochemical acrylate polymer.

The antimicrobial agent is not particularly limited as long as it is an antimicrobial agent usually used in a coating composition. The antimicrobial agent is preferably used in an amount of 0.1 to 1.0% by weight based on the total weight of the coating composition. Preferably, the antimicrobial agent is methyl-N-benzimidazol-2-ylcarbamate, 2-n-octyl-4-isothiazolin- -octyl-4-isothiazolin-3-one), or a mixture thereof.

As the other additives, at least one selected from the group consisting of a thickener, a preservative, a cryoprotectant, a dispersant, a defoaming agent, and a nonionic emulsifier may be used. Other additives may be used in an amount of 5 to 25% by weight based on the total weight of the coating composition. The antifoaming agent may be a mineral oil type, a silicone type or other type in order to smoothly remove bubbles generated when mixing water and powder. The thickener is used for increasing the viscosity to prevent precipitation of the ceramic, and a cellulose thickener or an acrylic thickener may be used. The dispersant may be added in order to uniformly disperse the additive material mixed in the process of manufacturing the paint without separating.

The coating composition of the present invention may further comprise rosin. The rosin may be included in an amount of 0.5 to 1% by weight based on the total weight of the coating composition. By using rosin as an additional binder, the ability to adsorb harmful substances can be improved and the antimicrobial activity can be enhanced.

Hereinafter, the present invention will be described in more detail with reference to examples and comparative examples. However, the present invention is not limited to the examples.

Example  One

As the acrylic binder, 40.13% by weight of a water-dispersed acrylic ester copolymer (solid content 48% by weight), 5.18% by weight of calcium carbonate, 2.36% by weight of uraite, 0.94% by weight of jade, 2.30% by weight of urea, 1.24% by weight of amine, , 1.5% by weight of a fluorine coating agent (PM-4700, manufactured by 3M KOREA), a thickener (Dow Chemical Co., Ltd.), 1.05% by weight of adipic acid dihydrazide, 16.97% by weight of pigment (titanium dioxide), 0.19% by weight of antimicrobial agent, 20.96% (FX-405) 0.38 wt.%, The antifoaming agent (EG) 1.89 wt.%, The dispersing agent (DD-150) 0.47 wt.%, The nonionic emulsifier (NXZ) was mixed with 0.18% by weight of water to make a total amount of 100% by weight to prepare a functional coating composition.

Experimental Example  1 - Evaluation of acetaldehyde removal

The removal efficiency of acetaldehyde of the functional coating composition prepared above was evaluated. The test was analyzed by Korea Ceramic Technology Institute. The test conditions and results are shown in Table 1 below.

Test analysis
Item Test environment Test period Analysis method Analysis Temperature Humidity Adsorption characteristic
evaluation 25 ± 3 ° C 45 ± 5% R.H. 2 weeks Instrument analysis Acetate
Aldehyde
Removal efficiency
25%

As can be seen from the above, the functional coating composition according to the present invention shows excellent acetaldehyde removal efficiency of 25%.

Experimental Example  2 - Antifungal  evaluation

The antifungal property (ASTM G21-09) of the functional coating composition prepared above was evaluated. Fungal strains were Aspergillus niger ATCC9642, Penicillium pinophilum ATCC 11797, Glicladium virens ATCC 9645, Chaetomium globosum ATCC 6205 and Aureobasidium pullurans ATCC 15233. The specimens were prepared at a size of 5 x 5 cm, and then fixed in an agar medium inoculated with the fungal mixed spores. The cells were incubated for 4 weeks in an incubator adjusted to a temperature of 28 ° C and a humidity of 85%. During the incubation period, antifungal effect was measured by confirming the growth of the fungus on the surface of the sample and the formation of the clear zone. The measured results are shown in Table 2 below.

1 week 2 weeks 3 weeks 4 weeks Resistance Jersey
(mm) Resistance Jersey
(mm) Resistance Jersey
(mm) Resistance Jersey
(mm) 0 10 0 8 0 8 0 8

In the above Table 2, the resistance shows 0 to 4 grades (spore formation and mycelial growth) by observing the growth of test pieces, 0 grade is no growth, 1 grade is small growth (less than 10% of the area) Growth (10 to 30% of area), grade 3 is medium growth (30 to 60% of area) and grade 4 is high growth (60% of area). As shown in the table, the functional coating composition according to the present invention has excellent antifungal effect.

Experimental Example  3 - Evaluation of antimicrobial activity

The antimicrobial activity of the functional coating composition prepared above was evaluated by a qualitative test (JIS L 1902: 2008) and a film adhesion method (JIS Z 2801: 2000) for Escherichia coli and Staphylococcus aureus.

- Qualitative examination (JIS L 1902: 2008)

The strains used were Staphylococcus aureus ATCC 6538 and Escherichia coli ATCC 8739. A sample of a size of 28 mm in width × 28 mm was prepared, and the microorganism was cultured in a liquid medium. After diluting the microorganism diluted to about 10 ^{6 to 7} per ml, the mixture was diluted and 1 ml of the microbial solution was added to the agar medium (Nutrient Agar Medium) Inoculated, and smoothed. The sample was placed in a plate-coated flat-plate culture medium, fixed in contact with the medium, and cultured in a 37 ° C incubator for 24 to 48 hours. After confirming that the cultured bacteria were fully grown, the size of the Halo zone (Clear Zone) formed in the periphery was measured to evaluate antimicrobial activity.

Name of sample Escherichia coli Staphylococcus aureus Lower limit (mm) Lower limit (mm) Functional coating composition 3 2

- Film adhesion method (JIS Z 2801: 2000)

The strains used were Staphylococcus aureus ATCC 6538 and Escherichia coli ATCC 8739. A specimen having a square size of 50 ± 2 mm was prepared, and the specimen coated with the functional coating composition was set as Example 1, and the specimen not coated with the functional coating composition was set as Comparative Example 1. The specimens were placed face up on a sterilized plate, 0.5 ml of the prepared stock solution was placed, and the surface of the specimen was covered with a Stomacher film (40 x 40 mm) so that the fungus spreads widely. Plates treated with the specimens were sealed with PARA film and cultured at 35 ° C and 90% humidity for 24 hours. After 24 hours, the culture broth on the surface of the test piece and the film was washed with 10 ml of SCDLP medium (1 ml), and the number of viable cells was measured by measuring the viable cell count by taking 1 ml of washing water.

division CFU / ml Decrease (%) Antibacterial activity (R) Contact initial 24 hours Comparative Example Comparative Example Escherichia coli Comparative Example 1 5.1E + 04 2.8E + 06 - - Example 1 1.0E + 01 99.99% 5.4 Staphylococcus Comparative Example 1 1.0E + 05 1.3E + 06 - - Example 1 1.0E + 01 99.99% 5.1

As can be seen from Tables 3 and 4, the functional coating composition according to the present invention has an excellent antimicrobial effect.

Experimental Example  4 - Deodorizing property  Evaluation (Ammonia)

The deodorizing property of the functional coating composition prepared in Example 1 was evaluated by Korea Institute of Construction & Living Environment Test. In the test, the sheet coated with the functional coating material prepared above was placed in a 5 L-sized reactor in a size of 100 mm x 200 mm (width x length) and sealed. Then, the initial concentration of test gas (NH ₃ ) was injected at 50 μmol / mol and the concentration of the test gas was measured at the initial (0 minute), 30 minute, 60 minute, 90 minute and 120 minute. The concentration of the test gas was measured by KS | 2218: 2009. During the test, the temperature was maintained at 23 ± 5 ° C and the relative humidity was maintained at 50 ± 10%. The test was carried out in the same manner as above for the sheet on which the paint was not coated, and this was regarded as Comparative Example 1. The removal rate of test gas for each hourly period was calculated according to the following equation.

Test gas removal ratio (%) = [(concentration of Comparative Example 1) - (concentration of Example 1)} / (concentration of Comparative Example 1)] x100

The test results are shown in Table 5 below.

Test Items Test result Comparative Example 1 Concentration
(μmol / mol) Example 1 Concentration
(μmol / mol) Deodorization rate (%) Deodorization
exam
ammonia
NH ₃ 0 minutes 50 50 0.0 30 minutes 49 14 71.4 60 minutes 49 12 75.5 90 minutes 49 10 79.6 120 minutes 49 9 81.6

As shown in the above table, the functional coating composition according to the present invention has excellent deodorization performance.

The present invention has been described with reference to the preferred embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

Claims (6)

As a functional coating composition,
A coating composition comprising 20 to 50% by weight of an acrylic binder, 3 to 20% by weight of a functional material, 0.5 to 10% by weight of a harmful substance removing agent, 10 to 25% by weight of pigment, 20 to 35% by weight of diatomaceous earth, 0.1 to 1.0% by weight of antimicrobial agent, 0.5 to 1.0% by weight of pine resin, 5 to 25% by weight of other additives,
Wherein the acrylic binder is a water-dispersed acrylic ester copolymer having a viscosity of from 3,000 to 4,000 cps (25 DEG C)
Wherein the functional material is at least one selected from the group consisting of ilite, zeolite, elvan, jade, loess, calcium carbonate and nano silver,
Wherein the harmful substance remover comprises 0.1 to 5% by weight of the total weight of the coating composition, 0.1 to 2% by weight of an amine, 0.1 to 1.5% by weight of an ammonium salt and 0.1 to 1.5% by weight of adipic acid dihydrazide. Functional coating composition. delete delete delete delete The method according to claim 1,
Wherein the other additive is at least one selected from the group consisting of a thickener, a preservative, a cryoprotectant, a dispersant, a defoaming agent, and a nonionic emulsifier.