KR100706302B1 - Composition for blocking off harmful gas from furniture and timber - Google Patents

Abstract

The present invention relates to a blocker of harmful substances in furniture and building materials, gelatin 5.0-8.0 (w / v)%, pectin 0.5-1.0 (w / v)%, potassium silicate 0.3-1.5 (w / v)%, CMC 0.1-2.0 (w / v)%, PVA 0.2-0.5 (w / v)%, nitric acid (HNO ₃ ) 0.05-0.5 (w / v)% and water.

The blocking agent according to the present invention forms a barrier on the surface of various furniture and building materials including wood, gypsum board, leather, and prevents harmful substances such as formaldehyde and volatile organic compounds from being released into the air. By improving the quality, you can prevent symptoms of sick house syndrome, such as allergies, headaches, nausea, and respiratory problems. Hazardous substance blocking agent of the present invention is characterized by a natural substance such as gelatin, pectin as a main ingredient, less harmful to the human body, and low-cost and semi-permanent effect. In addition, since it is transparent and does not damage the gloss of the surface, it can be used for raw materials of furniture and building materials as well as already manufactured products, and has a fast drying speed and can be easily used by anyone without special technology.

Block harmful substances, block odor, prevent sick house syndrome, volatile organic compounds, formaldehyde, gelatin, pectin, potassium silicate.

Description

Composition for blocking off harmful gas from furniture and timber}

1 is a schematic diagram of a system for implementing a small chamber method.

The present invention relates to a harmful substance blocking agent of furniture and building materials.

Many of the materials used in furniture manufacturing and construction are made of wood cut pieces, shredded pieces, etc., using plates made by adding synthetic resin adhesive, pressing, and molding to release volatile organic compounds contained in the adhesive into the air. Even in the case of using wood or leather, chemicals are processed for preservation, so harmful substances such as formaldehyde are released into the air. Volatile organic compounds released into the air can contaminate indoor air and cause symptoms such as allergies, eye or skin itching, headaches and nausea with an unpleasant odor. Especially in the case of new buildings, indoor air pollution caused by formaldehyde or volatile organic compounds emitted from various building materials is serious, and many of the tenants experience the above symptoms.

As the severity of indoor air pollution is known, various methods for preventing it have been proposed. For example, Korean Patent Publication No. 10-0383123 catalyst composition and deodorization method using the same provided a method of removing odor components using a catalyst composition containing a phosphate of a tetravalent metal, a hydroxide of a divalent metal and a photocatalyst, Patent No. 10-0421707 deodorizing and antimicrobial compositions provided moldings having a deodorizing and antimicrobial effect made from thermoplastic resins containing oxides or hydroxides of alkaline earth metals, hydrous silicic acid and cationic surfactants. The new house syndrome preventive agent and its manufacturing method provided a new house syndrome preventive agent containing a dilute solution of conifer extract, mineral powder consisting of celite, gadolinite, and samar sky, and deep granite powder. -0591783 Finishing material for building interior materials that emits negative ions and gives off fragrance Water and its manufacturing method provided a method for removing harmful substances and purifying indoor air by using a finish composition consisting of mica, guinea pig, onion peel, bamboo charcoal, liquid pine needles, methyl alcohol, and the like. The coating composition for wallpaper coating No. 0591515 provides a method for removing toxic substances, including formalin, using a composition consisting of natural inorganic materials and binders, such as ocher, charcoal, jade, ganban stone, mica, ceramic, shell.

However, the above methods are effective by adsorbing harmful substances or removing them through chemical reactions, and use the method of placing moldings at appropriate places in the room or installing them on the walls or floors of the room. However, when the amount of surface emission is large, the effect of removing harmful substances is not only decreased, but the effect is not maintained continuously after construction, and there is a limitation in that it is not possible to remove harmful substances generated in furniture other than walls or floors of the room. There is.

In the present invention, by using a natural raw material as the main material to provide a harmful material blocking of furniture and building materials short drying time, harmless to the human body and effective semi-permanent, by improving the quality of indoor air, allergy, headache, nausea, eyes or skin of To prevent symptoms of sick house syndrome such as stinging.

The present invention relates to a harmful substance blocker of furniture and building materials, gelatin, pectin, potassium silicate, CMC (Carboxymethylcellulose), PVA (Polyvinylalcohol), nitric acid (HNO ₃ ), water.

Gelatin contained in the harmful substance blocking agent of the present invention is an inducible protein obtained by hot water treatment of collagen, a natural protein constituting animal skins, tendons, cartilage, etc., and when dissolved in hot water, it forms a sol and forms a gel at room temperature. There is a characteristic. In the present invention, it is added to assist the formation of the barrier film by giving viscosity to the blocker, and the small amount of gelatin is not effective because the effect is small, the gelation is too fast if the added amount is too large, 5-8 (w / v) Add in% concentration range. In the present invention, (w / v)% means the number of g contained per 100 ml of solution.

Pectin is a type of polysaccharide that binds to cells and is present between plant cell membranes and promotes jelly when the fruit is ripe. It is used to make jams, jelly, and grass. In the present invention, it helps to form a gel at room temperature, and condensation reaction with lignin and cellulose of wood to form a mesh to strengthen the barrier film, if the addition amount of pectin is too high gelation is too fast in the present invention 0.5-1.0 Add in (w / v)% concentration range.

Potassium silicate is a generic term for compounds in which SiO ₂ and K ₂ O are bonded in various proportions. In the present invention, liquid potassium silicate containing 7.9 (w / v)% K ₂ O and 20.0 (w / v)% SiO ₂ is used. Use as a material. Potassium silicate in the present invention controls the curing state of the blocker and prevents the progress of the gel at room temperature and prevents decay. Adds in the range of 0.3-1.5 (w / v)% concentration.

CMC (Carboxymethylcellulose) increases the viscosity of the blocker, maintains the dispersion state and serves to block the pores of the blocker. If the amount is large, the viscosity is strong and coating and spraying are difficult, so in the present invention, it is added within the concentration range of 0.1-2.0 (w / v)%.

PVA (Polyvinylalcohol) is a polymer in the form of a white powder, so it has a property of melting in hot water can be prepared an aqueous solution. In the present invention, the PVA aqueous solution is prepared and added, the PVA aqueous solution is viscous and adhesive, has excellent permeability and storage properties, and the polymer film produced after drying is colorless, transparent, excellent in tensile and abrasion resistance, and blocks gas. There is this. Therefore, the barrier agent penetrates well into the material and forms a rigid membrane, which serves to semi-permanently prevent the release of harmful gases into the air.

Nitric acid (HNO ₃ ) is a strong acid has the property of decomposing to light, in the present invention is added in small amounts to help the dispersion state of the blocker and prevent corruption.

The hazardous substance blocking agent of the present invention is used after coating, spraying or depositing materials on furniture and building materials, or by spraying and spraying on already manufactured products. The harmful substance blocking agent of the present invention penetrates the furniture and building materials to form a protective film of a solid network structure, and serves to physically block the harmful substances from being released into the air. The harmful substance blocking agent of the present invention does not damage the gloss even when applied to a transparent and glossy product, and forms a blocking film when dried at room temperature for 1-2 hours after applying or spraying the blocking agent. The exterior including the front of a general furniture is coated with a coating for color and gloss, so when applying it to a manufactured furniture, it is preferentially applied and sprayed on the exposed part of the material such as the back or the inside of the furniture. Is more effective.

Hazardous substance blocking agent of the present invention by mixing gelatin and pectin, Carboxymethylcellulose (CMC) in 50-60 ℃ distilled water and removing bubbles to prepare a gelatin and pectin mixed solution, distilled water in PVA (Polyvinylalcohol) solution dissolved in 100 ℃ distilled water After diluting the diluted potassium silicate solution, gelatin and CMC mixed solution is mixed and distilled water and nitric acid (HNO ₃ ) is added. The final concentration is gelatin 5.0-8.0 (w / v)%, pectin 0.5-1.0 ( w / v)%, potassium silicate 0.3-1.5 (w / v)%, CMC 0.1-2.0 (w / v)%, PVA 0.2-0.5 (w / v)%, nitric acid (HNO ₃ ) 0.05-0.5 (w / v)%.

The polyvinylalcohol (PVA) solution is prepared in a concentration of 1-3 (w / v)%, potassium silicate solution 11-17 (w / v)%, and then the potassium silicate solution of volume ratio 1 to the PVA solution of volume ratio 2 Are mixed in small amounts, but the concentration of the potassium silicate solution to be added is high or rapid, or when the PVA solution is added to the potassium silicate solution. It is preferable not to deviate from the said concentration range, and it is preferable to also observe the mixing order. In addition, the gelatin and pectin mixed solution to remove the foam by using ultrasonic vibration after cooling to room temperature after the stirring is completed, if the bubble is left, it is preferable to remove completely because it blocks the formation of the barrier film.

EXAMPLE

[Step 1] Preparation of gelatin and pectin mixed solution

80 g of gelatin powder, 5 g of pectin and 5 g of CMC (Carboxymethylcellulose) were added to 500 mL of 50-60 ° C. distilled water, and the mixture was stirred at 3000 rpm while maintaining a temperature of 50-60 ° C. for 1 hour to completely dissolve the solid phase components, and then cooled to room temperature. Bubbles were completely removed by ultrasonic vibration to prepare a gelatin and pectin mixed solution.

[Step 2] Preparation of PVA (Polyvinylalcohol) Solution

2 g of PVA was added to 80 mL of 100 ° C. distilled water and heated for 30 minutes to make a gel. Then, distilled water was gradually added and mixed to a volume of 100 mL to prepare a PVA solution.

Example 3 Preparation of Potassium Silicate Solution

Potassium silicate solution was prepared by mixing 25 mL of liquid potassium silicate [containing 7.9 (w / v)% K ₂ O, 20.0 (w / v)% SiO ₂ ] and 25 mL of distilled water.

[Step 4] Preparation of the mixed solution of PVA and potassium silicate

50 mL of potassium silicate solution of Example 3 was slowly added dropwise to 100 mL of the PVA solution of Example 2, and stirred at 3000 rpm for 1 hour to prepare a mixed solution of PVA and potassium silicate in a transparent state.

[Step 5] Preparation of Hazardous Substance Blockers

After mixing the gelatin and pectin mixed solution of Example _{1 with} 150 mL of the mixed solution of PVA and potassium silicate of step 4 and 0.5 g (333 μl) of nitric acid (HNO ₃ ), distilled water was added and mixed so that the total volume was 1 L. Toxic substance blocking agent of the present invention was prepared.

Toxic substance blocking agent prepared according to the embodiment is a yellowish transparent liquid, gelatin 8.0 (w / v)%, pectin 0.5 (w / v)%, potassium silicate 0.7 (w / v)%, CMC 0.5 ( w / v)%, PVA 0.2 (w / v)%, HNO ₃ 0.05 (w / v)% and distilled water.

In order to confirm the effect of the harmful substance blocking agent according to the present invention was tested as follows.

[Test method] Small chamber method

According to the small chamber method of the Korea Air Cleaning Association (SPS-KACA008-138) was tested using the system shown in FIG. Specifically, two samples are placed in a 20 L metallic chamber maintained at a temperature of 25 ° C. and a relative humidity of 50%, and the clean-air supply system is set up so that 167 mL / 1 min. Of air passes through the chamber. Air was collected on days 7, 14, 21 and 28 respectively. The collected air was analyzed for the concentration of formaldehyde using HPLC, and the concentration of total volatile organic compounds (TVOC) was measured by GC / MS and TD system.

Test Example 1 HDF Small Chamber Test

Six identical high density fiber boards (HDFs) of 165 mm x 165 mm x 20 mm were prepared, and two were classified into a control group and four were divided into test groups. The test group was applied to the pesticide blocker according to the embodiment with a brush and dried for 2 hours at 25 ℃, 50% relative humidity conditions, the control group was not treated separately. Formaldehyde and total volatile organic compound (TVOC) concentrations were measured for each sample, and the results of 2 control groups and 4 test groups were averaged for each group, and are shown in Table 1 and Table 2. .

Test Example 2 Small Chamber Test for PB

Prepare 6 sheets of the same PB (Particle board) of 165mm × 165mm × 30mm, and measure the concentration of formaldehyde and total volatile organic compound (TVOC) according to the test method for each sample in the same manner as in Test Example 1. And the average of each group is shown in Table 3 and Table 4.

Test Example 3 Small Chamber Test for Synthetic Leather

Prepare 6 sheets of the same domestic synthetic leather of 165mm × 165mm size, and measure the concentration of formaldehyde and total volatile organic compound (TVOC) for 7 days according to the test method for each sample in the same manner as in Test Example 1. And the average of each group is shown in Table 5 and Table 6.

Test Example 4 Small Chamber Test on Gypsum Board

Prepare 6 sheets of the same domestic gypsum board of 165mm × 165mm size and measure the concentration of formaldehyde and total volatile organic compound (TVOC) for 7 days according to the test method in the same manner as in Test Example 1 The average of each group is shown in Table 7 and Table 8.

Test Example 5 Field Test

To measure the concentration of volatile organic compounds such as formaldehyde, benzene, toluene, ethylbenzene, styrene and total volatile organic compounds (TVOC) in the indoor air of the new school library, and as a hazardous material blocking agent After the barrier film was made on the bookshelf and desk of the library, the concentration change was measured. The results are shown in Table 9.

[Table 1] TVOC Concentration Released from Domestic HDF

Elapsed time Control group (mg / ㎡h) Test group (mg / ㎡h) Reduction Rate (%)  1 day 0.531 0.014 97.36  3 days 0.353 0.011 96.88  7 days 0.190 0.004 97.89 14 days 0.083 0.003 96.39 21st 0.077 0.003 96.10 28 days 0.055 0.002 96.36

[Table 2] Formaldehyde Concentration Released from Domestic HDF

Elapsed time Control group (mg / ㎡h) Test group (mg / ㎡h) Reduction Rate (%)  1 day 0.723 0.108 85.06  3 days 0.721 0.104 85.58  7 days 0.740 0.096 87.03 14 days 0.745 0.100 86.58 21st 0.732 0.048 79.78 28 days 0.451 0.030 93.35

TABLE 3 TVOC Concentrations Released from Imported PB

Elapsed time Control group (mg / ㎡h) Test group (mg / ㎡h) Reduction Rate (%)  1 day 0.118 0.021 82.20  3 days 0.129 0.013 89.92  7 days 0.123 0.016 86.99 14 days 0.143 0.021 85.31 21st 0.156 0.027 82.69 28 days 0.151 0.020 86.75

Table 4 Formaldehyde Concentration Released from Imported PB

Elapsed time Control group (mg / ㎡h) Test group (mg / ㎡h) Reduction Rate (%)  1 day 0.060 0.003 95.00  3 days 0.079 0.008 89.87  7 days 0.046 0.004 91.30 14 days 0.048 0.012 75.00 21st 0.061 0.008 86.89 28 days 0.023 0.005 78.26

[Table 5] TVOC Concentration Released from Korean Synthetic Leather

Elapsed time Control group (mg / ㎡h) Test group (mg / ㎡h) Reduction Rate (%) 1 day 0.701 0.043 93.87 3 days 0.695 0.039 94.39 7 days 0.735 0.041 94.42

[Table 6] Formaldehyde Concentration Released from Domestic Synthetic Leather

Elapsed time Control group (mg / ㎡h) Test group (mg / ㎡h) Reduction Rate (%) 1 day 0.012 0.001 91.67 3 days 0.026 0.003 88.46 7 days 0.025 0.002 92.01

[Table 7] TVOC Concentration Released from Domestic Gypsum Boards

Elapsed time Control group (mg / ㎡h) Test group (mg / ㎡h) Reduction Rate (%) 1 day 0.384 0.073 80.98 3 days 0.310 0.054 82.58 7 days 0.109 0.021 80.73

[Table 8] Formaldehyde Concentration Released from Domestic Gypsum Boards

Elapsed time Control group (mg / ㎡h) Test group (mg / ㎡h) Reduction Rate (%) 1 day 0.010 0.003 70.00 3 days 0.007 0.001 85.71 7 days 0.005 0.001 80.00

As a result of the test on the HDF, PB, synthetic leather, gypsum board used as furniture and building materials as described above, as shown in Table 1 to Table 8, the test group to which the harmful substance blocking agent of the present invention is applied as compared to the control group The total volatile organic compounds released and the concentrations of formaldehyde decreased significantly, with a decrease of 75.00-97.89%. Therefore, it was confirmed that the harmful substance blocking agent of the present invention has the effect of blocking harmful substances such as formaldehyde and total volatile organic compounds emitted from furniture and building materials.

[Table 9] Concentrations of Volatile Organic Compounds in Stretched Libraries (㎍ / ㎥)

Reference value Before using blockers After using blocker % Reduction Formaldehyde  210 233.0 57.8 75.2 Benzen   30    1.76   0.50 71.6 Toluene 1000  213.84  55.94 73.8 Ethylbenzene  360    6.79   1.77 73.9 Styrene  300    2.42 - 99.9 Xylene  700   29.81   7.31 75.5 TVOC -  581.90 158.92 72.7

In Table 9, the standard values refer to the recommended standard values of pollutants in accordance with the Indoor Air Quality Control Act, etc., as amended on December 30, 2006. As can be seen from Table 9, although the concentration of formaldehyde in the volatile organic compounds in the air of the new library exceeded the standard value, after applying the harmful substance blocking agent of the present invention to the bookshelf and desk of the new school library to form a barrier film The concentrations of formaldehyde, benzene, toluene, ethylbenzene, styrene and total volatile organic compounds in the indoor air were significantly reduced, resulting in lower formaldehyde concentrations.

From the above results, it was confirmed that the harmful substance blocking agent of the present invention has an effect of blocking the release of volatile organic compounds into the air from furniture and building materials, and after the construction of the blocking agent of the present invention, the unpleasant characteristic of new furniture Odor, eye and skin tingling and nausea were significantly reduced. Hazardous substance blocking agent of the present invention was transparent even after drying it did not damage the gloss even when applied to a glossy product, it was easy to use because it forms a barrier film in a simple process waiting for 2 hours after application or spraying.

Hazardous substance blocking agent according to the present invention forms a barrier on furniture and building materials to prevent the release of volatile organic compounds into the air, thereby improving the quality of the indoor air, such as allergy syndrome, headache, nausea, respiratory disease Symptoms can be prevented. Hazardous substance blocking agent of the present invention is characterized by a natural substance such as gelatin, pectin as a main ingredient, less harmful to the human body, and low-cost and semi-permanent effect. In addition, since it is transparent and does not damage the gloss of the surface, it can be used not only for furniture such as wood, leather, gypsum board, or building materials, but also for already manufactured furniture, and can be used for easy drying methods such as coating and spraying. .

Claims (5)

delete Gelatin 5.0-8.0 (w / v)%, pectin 0.5-1.0 (w / v)%, potassium silicate 0.3-1.5 (w / v)%, CMC 0.1-2.0 (w / v)%, PVA 0.2-0.5 ( Hazardous material blockers for furniture or building materials containing w / v)%, 0.05-0.5 (w / v)% nitric acid and water. delete Households formed with a barrier film using the harmful substance blocking agent of claim 2. A building material in which a barrier film is formed by using the hazardous substance blocking agent of claim 2.

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