KR101036607B1 - An emit restrainer of noxious matter using a natural substance and a method of thereof - Google Patents

Abstract

PURPOSE: A surface release inhibitor is provided to suppress the release of harmful materials and to ensure easy coating, fast drying time at room temperature, and environment-friendly property using natural materials harmless to the human body. CONSTITUTION: A surface release inhibitor of harmful materials includes the steps of: putting starch and hydroxypropyl methylcellulose into distilled water, and heating and stirring the mixture to obtain a transparent gel; and after the mixing is proceed until the room temperature achieves, adding sodium phosphate as a dispersing agent lithium, lithium silicate, polydimethylsiloxane, and boric acid, and stirring the mixture at 50~60 °C and 300 rpm for 3 hours; and filling distilled water so that a final concentration is 5.0~10.0 weight% of starch, 0.1~0.50 weight% of hydroxypropylmethylcellulose, 0.5~1.0 weight% of sodium phosphate, 5.0~10 weight% of lithium silicate, 0.5~1.0 weight% of polymethylsiloxane, 0.1~0.5 weight% of boric acid, and the remaining amount of water.

Description

An emit restrainer of noxious matter using a natural substance and a method of conjugate

The present invention relates to a surface release inhibitor of harmful substances, and more particularly, to prevent indoor air pollution by blocking the release of harmful substances such as toluene and formaldehyde to the outside from the surface of substrates such as paint, wallpaper, and wood. It relates to a surface release inhibitor of harmful substances using natural substances which can be reduced.

Recently, as indoor and outdoor air pollution increases the risk of the human body in various forms such as sick house syndrome, volatile organic compounds (VOCs) such as formaldehyde, toluene and acetaldehyde generated indoors are fundamentally removed. Most of the development of coating technology is developed mainly in developed countries, and in Korea, most of them are still dependent on imports.

So far, its own technology is very weak in Korea, and products applicable to ultraviolet light and visible light are coming out, but the effect is insignificant in weak interiors and weak light.

 In addition, the conventional methods are used to sinter Cu, Fe, Mg, or nitrogen or sulfur in order to exhibit an efficient effect in indoor visible light in synthesizing the photocatalyst, or to sinter at a high temperature of 500 ° C. In addition, it takes a lot of time and cost to manufacture, and in particular, in the mass production process, the process of making the particles into fine nano-molecules is introduced, which causes many difficulties. The reality is that the effect is quite halved.

 In particular, in the manufacturing process of plywood or leather using a synthetic resin adhesive, a large number of volatile organic compounds such as toluene and formaldehyde are released into the air, causing memory loss, allergies, headaches and cancer. As the dangers of indoor air are highlighted, various methods for solving them are proposed. For example, in the deodorizing and antimicrobial composition of the Republic of Korea Patent Publication No. 10-0421707 provided a method of having a deodorizing and antimicrobial effect by using an alkali metal oxide and cationic surfactant, Patent No. 10-0478178 in the new house syndrome. In the preventive agent and method of preparing the same, a diluent of conifer extract, minerals consisting of celite, gadolinite, and samarite, and a new house syndrome preventive agent containing acute granite powder were provided, and in Korean Patent Publication No. 10-0591515, The coating composition provided a method for removing toxic substances by using natural inorganic materials such as ocher, charcoal, jade, ganban stone, mica, and ceramics.

However, the above methods are mainly used to remove harmful substances through photoreaction or chemical adsorption, and there is a problem in that the effect is greatly deteriorated when there is a large amount of harmful substances emitted in a space without light or emitted. In addition, in the case of the noxious substance blocking agent of furniture and building materials No. 10-2006-010864, there is a problem that the coating process is difficult and the effect is not continuously exerted after construction, such as the performance of the coating surface is greatly degraded over time. Therefore, the coating process is easy and the development of technology that can continuously suppress the release of harmful substances is required.

The present invention is to solve the problems of the prior art as described above, by forming a dense coating by coating the surface of the substrate to discharge various harmful substances such as toluene, formaldehyde, etc. to suppress the release of harmful substances to the outside Not only that, but the purpose is to provide an environmentally friendly surface release inhibitor of harmful substances and a method of manufacturing the same by using a natural material as a main raw material is fast drying time and harmless to the human body even at room temperature.

The present invention to achieve the object of the present invention as described above;

By weight starch 5-10%, hydroxypropyl methycellulose 0.1-0.5%, sodium phosphate 0.5-1%, lithium silicate 5-10%, polydimethylsiloxane 0.5-1%, boric acid 0.1- Provide a surface release inhibitor of a hazardous substance, comprising 0.5%, remaining water.

The starch used in the inhibitor for releasing harmful substances of the present invention is a mixture of amylose and amylopectin, which is a polysaccharide formed by long condensation of numerous D-glucose (glucose). The molecular weight is 50,000 to 200,000, and the specific gravity is about 1.65. When the starch is poured with hot water or heated with water, the starch particles expand to form a viscous liquid, or glue. When macromolecules are formed by condensation reaction of glucose, more than 5% can inhibit the release of harmful substances. However, if it exceeds 10%, the efficacy is no longer expected. % In this specification represents weight%.

In addition, the lithium silicate solution is solidified when hot and cooled to about 25 ° C., and becomes a transparent and stable liquid again within several hours, dried at room temperature to prevent corrosion of the coating surface and strong water resistance. Add to form densely. The content was optimally tested in the above range.

In addition, sodium phosphate is added in order to prevent the precipitation of starch in the coating solution over time, and if the amount is too large, the durability of the surface after coating is weakened, so it is added in the concentration range of 0.1-0.5%.

Polydimethylsiloxane (Polydimethylsiloxane) does not affect the performance and in the present invention is added in small amounts in the concentration range of 0.1 to 0.5% to add a gloss function on the surface after coating.

Hydroxypropyl methylcellulose (Sydroxypropyl methylCellulose) swells in water to form a mucous suspension, such as a transparent opal, insoluble in alcohol or ethanol. Hygroscopic, pH is 5.0-8.0. The heating and cooling change from the sol to the gel. A small amount is added to form a dense coating film by increasing the viscosity on the surface of the substrate during coating to speed up the drying time and improve the adhesion in the coating film formation process.

Boric acid is a white crystal that dissolves well in water. The solution is acidic and has a bactericidal effect. In the present invention, a small amount is added to prevent corruption of the coating solution to prevent the performance of the harmful substance release inhibitor from decreasing.

Hazardous substance release inhibitor according to the present invention is used by spraying on the surface of plywood, wallpaper, furniture, sofa, etc., can be installed even when the humidity in the air is high, the coating can be formed even within 50% moisture content. After coating, it does not affect the surface of the substrate, such as color change, and is mainly coated on the rough wood surface such as the lower part of the drawer, the cutting part, the back part of the furniture and the inner surface of the drawer without coating film on the surface of the substrate installed indoors. Performance.

In the present invention, starch and hydroxypropyl methyl cellulose are added to distilled water, and the temperature is raised to 100 ° C., and then stirred at 300 rpm, and gelated until it becomes completely transparent. Then, the mixture is stirred until room temperature and sodium phosphate is a dispersant. And lithium silicate, polydimethylsiloxane, and boric acid were added and stirred at 300 rpm for 3 hours or more at a temperature of 50 to 60 ° C. and filled with distilled water. The final concentration was 5.0 to 10.0% of starch and 0.1 to 0.50% of hydroxypropyl methylcellulose. Sodium phosphate 0.5-1.0% lithium silicate 5.0-10%, polymethylsiloxane 0.5-1.0%, boric acid 0.1-0.5% and the rest of the water to provide a method for producing a surface release inhibitor.

Hazardous substance release inhibitor on the surface of the substrate according to the present invention can block the contamination of indoor air by harmful substances even in a space without light, and is particularly effective for improving the indoor air quality of new apartments. It does not affect the surface of the substrate after coating, and it has excellent durability and does not cause secondary environmental problems in the coating process because distilled water is used as a solvent. In addition, it can be applied to various materials such as furniture, sofa, as well as indoor wallpaper, and its utilization is very high. In addition, it is possible to prevent symptoms of sick house syndrome such as allergies, headaches, memory loss due to indoor air pollution, which are recently highlighted, and can greatly contribute to improving indoor air quality of new apartments.

Hereinafter, the present invention will be described in more detail with reference to preferred embodiments. The following examples are provided to assist the understanding of the present invention and to explain what can be carried out by those skilled in the art, but the present invention is not limited thereto.

Example 1 Preparation of Starch Mixed Solution

500 g of distilled water was added to the container, and the temperature was raised to 100 ° C., followed by 80 g of starch and 0.5 g of hydroxypropyl methylcellulose as an adhesive. The gel was gelatinized to a completely transparent state while stirring at 300 rpm, and then 1.0 g of sodium phosphate as a dispersant was added while stirring until reaching a room temperature.

Example 2 Preparation of Lithium Silicate Mixture

50 g of lithium silicate was added slowly to the above solution in small portions, and then 1 g of polymethylsiloxane and 1 g of boric acid were added thereto, followed by stirring at 300 rpm at a temperature of 50 to 60 ° C. for at least 3 hours and finally filling with 1000 g of distilled water. Material release inhibitors were prepared.

Hazardous substance release inhibitors of the present invention as described above form a dense coating to exhibit a continuous effect, even in the absence of light conditions or a large amount of emission of harmful substances to form a blocking film on the surface of the emission substrate harmful such as formaldehyde, toluene Inherently blocking external emissions from the substrate surface of the material has a great effect on the improvement of indoor air quality.

Hazardous substance release inhibitor prepared by the present invention was measured as in the following test example, using the same uncoated specimen as a control group Small Chamber Method (SPS-KACA008-138) standard of the Korea Air Cleaning Association and indoor air of new apartment Performance tests were conducted by quality measurement.

[ Test Example  1] Domestic MDF  Comparison of emission amount according to temperature change after coating MDF

Four identical MDFs of 165 mm x 165 mm x 20 mm were prepared, two of which were control groups and two of the test groups.

The test group was coated with a spray for toxic substance release inhibitor according to the embodiment and dried for 2 hours at 25 ℃, 50% relative humidity conditions, the control group was not coated. Each sample was measured for formaldehyde concentration and total volatile organic compound (TVOC) concentration according to the small chamber test method, and the release inhibitor performance was tested by comparing the results of the control group and the test group.

        25 ℃ HCHO (ug / m3) 35 ℃ HCHO (ug / m3) Control group  Test group Control group  Test group 2529.1 1137.2 3455.8 1770.2         25 ° C VOC (mg / m2h) 35 ° C VOC (mg / m2h) Control group  Test group Control group Test group 2.7 0.69 3.15 1.54

As described above, it can be seen that the harmful substance release inhibitor of the present invention inhibits the release of harmful substances of formaldehyde and volatile organic compounds.

[Test Example 2] Before and after coating in domestic MDF domestic HDF 4.5T

Formaldehyde and TVOC Emission Changes

Elapsed date
TVOC (mg / m2h) HCHO (mg / m2h) Control group Test group Control group Test group Day 1 0.531 0.018 0.723 0.243 Day 3 0.353 0.04 0.721 0.225 Day 7 0.19 0.009 0.74 0.161 Day 14 0.083 0.008 0.745 0.174 Day 21 0.077 0.008 0.732 0.21

[ Test Example  3] Malaysia PB  18T acid resistant HDF  At 4.5T Before and after coating

Formaldehyde and TVOC Emission Changes

Elapsed date          TVOC (mg / m2h) HCHO (mg / m2h) Blank Coat1 Blank Coat1 Day 1 0.108 0.017 0.049 0.006 Day 3 0.112 0.019 0.051 0.006 Day 7 0.131 0.037 0.053 0.016 Day 14 0.139 0.044 0.059 0.02 Day 21 0.143 0.04 0.061 0.021

In Test Examples 2 and 3 it can be seen that the coating of the present invention inhibits the release of formaldehyde and volatile organic compounds which are harmful substances.

[ Test Example  4] Of new public housing  Performance comparison after construction of hazardous substance release inhibitor

HCHO (㎍ / ㎥) TVOC (㎍ / ㎥) Before construction After construction Before construction After construction 233.0 57.8 581.9 158.9 75.2% decrease 72.7% decrease

As can be seen in the above test example, the coating of the surface release inhibitor of the hazardous substance of the present invention can suppress the release of formaldehyde and volatile organic compounds.

Claims (2)

As a harmful substance release inhibitor on the surface of the substrate,
Contains 5.0-10.0% by weight starch, 0.1-0.50% hydroxypropyl methylcellulose, 0.5-1.0% sodium phosphate 5.0-10% lithium silicate, 0.5-1.0% polymethylsiloxane, 0.1-0.5% boric acid and the remaining water Hazardous substance release inhibitor on the surface of the substrate. As a method for producing a harmful substance release inhibitor on the surface of a substrate, add starch and hydroxypropyl methyl cellulose to distilled water, raise the temperature to 100 ° C., and stir at 300 rpm to gel until it becomes transparent, and then stir until normal temperature. And dispersant sodium phosphate, lithium silicate, polydimethylsiloxane and boric acid were added and stirred at 300rpm for more than 3 hours at a temperature of 50 ~ 60 ℃ and filled with distilled water to make starch 5.0 ~ 10.0% by weight, hydroxypropyl methylcellulose 0.1 to 0.50%, sodium phosphate 0.5 to 1.0% lithium silicate 5.0 to 10%, polymethylsiloxane 0.5 to 1.0%, boric acid 0.1 to 0.5% and the rest of the water to produce a method for inhibiting the release of harmful substances on the substrate surface .