KR102397381B1 - Composition with air purification function - Google Patents

Abstract

The present invention relates to a composition having an air purification function, characterized in that the water contains calcium chloride, copper chloride, and iron salt, pH 4.0 to 8.0, and high liquid stability in which no precipitate is formed at 0 to 80 °C.

Description

Composition with air purification function {COMPOSITION WITH AIR PURIFICATION FUNCTION}

The present invention relates to a composition having an air purification function, and more particularly, to a composition having an air purification function capable of purifying air by removing volatile organic compounds and odors in the air.

The environment we live in is polluted with volatile organic compounds (VOCs; hereinafter referred to as 'VOCs') and various bacteria and fungi.

The volatile organic compounds (VOCs) include benzene, toluene, xylene, etc., which are highly toxic and can cause mutations and cancer even in very small amounts.

In particular, benzene is a carcinogen and a substance that causes leukemia and lymphoma. Toluene and xylene, when inhaled habitually, are known to not only damage the kidneys and liver, but also cause brain dysfunction (MOBachmann and JE). Myers, Soc Sci Med 40, 245, 1995) Environmentally friendly regulations on these substances these days are in the case of the United States and Japan, the "Pollutant Release and Transfer Register (PRTR)" system is implemented to discharge, move, and register environmental pollutants in their country. In the European Union, it is managed through the REACH system, which has been applied since 2004, and in Korea, volatile organic compounds are managed through related laws and regulations. Countermeasures against this are still insufficient.

In addition, air pollution caused by bacteria and mold causes a lot of discomfort by generating bad odors from clothes and interior products that are frequently used in real life.

In addition, the sick house syndrome, which has been continuously reported in the media recently, causes serious harm to not only adults but also children with weak physical resistance by dissipating harmful substances such as volatile organic compounds from building materials such as wallpaper, furniture, and flooring, thereby lowering indoor air quality. are giving

Therefore, in recent years, public interest in improving air quality is increasing, and this social atmosphere requires environmentally friendly products that are comfortable and harmless to the human body not only for the surrounding living environment but also for daily necessities.

Various methods have been proposed to treat odors caused by volatile organic compounds and bacteria, but post-treatment methods by photocatalytic reaction and adsorption have been proposed and utilized. Representative materials include titanium dioxide as a photocatalytic material, and activated carbon and charcoal as adsorption materials. Titanium dioxide is easy and stable to manufacture among the photocatalysts studied so far, and is the most used photocatalyst, and activated carbon shows a high adsorption amount of organic matter.

As a prior art for purifying the air, as disclosed in Korean Patent Publication No. 2011-0073072, a titanium dioxide photocatalyst is irradiated with an electron beam to modify the surface of the photocatalyst to remove volatile organic compounds with increased light absorption and photoactivity under visible light A catalyst is disclosed, and Korean Patent Publication No. 2011-0072844 discloses a method for removing volatile organic compounds using carbon fibers. However, the titanium dioxide photocatalyst has a low organic material adsorption rate, and the activated carbon takes too long to purify the air, so it is difficult to actually see a great effect.

Therefore, there is an urgent need to develop a composition capable of effectively removing volatile organic compounds in the air and rapidly removing odors and the causes of odors.

The present invention was invented to solve the problems of the prior art as described above, and provides a composition having a high stability and high air purification function to remove the root cause of bad odor, and to have an air purification function capable of suppressing the inhabitation of various bacteria aim to do

Another object of the present invention is to provide a composition having an air purifying function capable of imparting an air purifying function to wallpaper and textile products.

Another object of the present invention is to provide a method for preparing a composition having an air purifying function.

The present invention provides a composition having an air purification function, characterized in that water contains calcium chloride, copper chloride, and iron salt, pH 4.0 to 8.0, and high liquid stability in which no precipitate is formed at 0 to 80 °C.

In addition, it provides a composition having an air purification function, characterized in that the water contains 1 to 9% by weight of calcium chloride, 0.1 to 9% by weight of copper chloride, and 0.1 to 3% by weight of iron salt.

In addition, there is provided a composition having an air purification function, characterized in that the composition further contains a crosslinking agent.

In addition, the crosslinking agent provides a composition having an air purification function, characterized in that 10 to 20 parts by weight is included in 100 parts by weight of water.

In addition, the present invention is a raw material mixing step of adding 1 to 9% by weight of calcium chloride, 0.1 to 9% by weight of copper chloride, 0.1 to 3% by weight of iron salt in water to water; A catalyst mixing step of further adding a catalyst, a pH adjuster, and a sequestering agent to the mixed composition; A reaction step of reacting the catalyst-mixed composition at 40-80° C. for 90-150 minutes; It provides a method for producing a composition having an air purification function, characterized in that it comprises a cooling step of cooling the reaction-completed composition.

In addition, the composition has a pH of 4.0 to 8.0, and provides a method for producing a composition having an air purification function, characterized in that stability is improved at 0 to 80° C. without the formation of a precipitate.

As described above, the composition having an air purification function according to the present invention is a composition formed of an inorganic material, and has excellent effects in air purification function and deodorization while preventing precipitation due to high stability of the composition.

In addition, the composition having an air purifying function of the present invention has an effect of removing the root cause of bad odor and inhibiting the inhabitation of various bacteria.

In addition, when used in wallpaper and textile products, it is a composition that can impart air purification and deodorization properties to the product, and has an effect suitable for wallpaper and textile products.

1 is a process diagram of a method for manufacturing a composition having an air purification function according to the present invention.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that in the drawings, the same components or parts are denoted by the same reference numerals as possible. In describing the present invention, detailed descriptions of related known functions or configurations are omitted so as not to obscure the gist of the present invention.

As used herein, the terms 'about', 'substantially' and the like are used in a sense at or close to the numerical value when the manufacturing and material tolerances inherent in the stated meaning are presented, and serve to enhance the understanding of the present invention. To help, precise or absolute figures are used to prevent unfair use by unconscionable infringers of the stated disclosure.

The present invention is a composition having an air purification function containing calcium chloride, copper chloride, and iron salt in water, including a raw material mixing step, a catalyst mixing step, a reaction step, and a cooling step as shown in FIG. is manufactured

The composition having an air purifying function of the present invention contains 1 to 9% by weight of calcium chloride, 1 to 9% by weight of copper chloride, and 0.1 to 3% by weight of iron salt. , iron salt is added.

As the copper chloride, monovalent copper (I) chloride, divalent copper chloride, etc. can be used, and it is preferable to use divalent copper (II) chloride.

The calcium chloride and copper chloride may be hydrated to increase the solubility of water.

When the calcium chloride, copper chloride, and iron salt are added below the above content range, the air purification performance and deodorizing function may decrease. Precipitation may occur.

In addition, when the content of copper chloride is high, the air purification function and deodorization function increase, but yellowing may occur in the composition or sheet paper containing the composition, so it is necessary to control the content according to the place of use and purpose of use, and 2% by weight or less It would be preferable to use

The chlorinated substances, which are the composition having the air purification function, are Mcl ₂ (M is a transition metal such as Ca, Cu, Fe), which is the active ingredient of Multi metal sol, and decomposes volatile organic compounds (VOCs) and harmful substances in the air through oxidation. It has a mechanism of sterilization by acting directly on harmful bacteria, decomposing cell membranes, and interfering with the electron transport system of harmful bacteria.

That is, the Mcl ₂ dissolves the cell membrane of harmful bacteria and acts with the enzymes in the cell to block the metabolic function of nutrients, that is, the inflow and discharge of nutrients, and the respiratory function of harmful bacteria to prevent intracellular APT (adenosine triphosphate, adenosine triphosphate) By inhibiting the production, it destroys the growth arrest and regeneration ability and kills harmful bacteria.

In addition, Mcl ₂ is a strong reactive substance and fundamentally removes harmful gas components by decomposing or changing the neutral odor components into odorless compounds through chemical reactions such as oxidation, reduction and neutralization with basic odor components and neutral odor components. will do

[Ammonia decomposition mechanism]

2NH ₃ +H ₂ +Mcl ₂ → 2NH ₄ cl(ammonium chloride)+M

Mcl ₂ is a metal with a very high electronegativity and causes a reduction reaction to generate hydrogen (H) from water molecules _in the air _. to remove odors.

[Formaldehyde Decomposition Mechanism]

HCHO(formaldehyde)+Mcl ₂ → HCO- ₃ (Bicarbonate)+M+H ₂ ↑

Mcl ₂ causes a reduction reaction to generate hydrogen (H) from water molecules in the air. At this time, it reacts with formaldehyde gas, which is a neutral odor, and is converted into bicarbonate (bicarbonate), a harmless component, and decomposes HCHO (formaldehyde) do

In the raw material mixing step, glycine may be further added as a buffering agent to increase reaction stability in the reaction step.

When adding the glycine, it will be preferable to add 0.5 to 2 parts by weight to 100 parts by weight of water.

In addition, when the composition having an air purification function of the present invention is manufactured for textile products, a crosslinking agent may be added in the raw material mixing step to increase the binding force between the textile product and the composition having an air purification function.

The crosslinking agent may use a silane-based crosslinking agent, and it is preferable to use Glycidoxy propyl trimethoxy silane.

10 to 20 parts by weight of the crosslinking agent may be included in 100 parts by weight of water.

The catalyst mixing step is a step of further adding a catalyst, a pH adjusting agent, and a sequestering agent to the composition in which the raw materials are mixed.

In the catalyst mixing step, imidazole as a catalyst, formic acid as a pH adjusting agent, and EDTA-2Na dihydrate as a sequestering agent may be used.

It will be preferable to add 0.3 to 2 parts by weight of the catalyst, the pH adjusting agent, and the sequestering agent to 100 parts by weight of water, respectively.

The reaction step is a step of reacting the composition in which the raw material and the catalyst are mixed at 40 to 80 ° C. for 90 to 150 minutes. It is important to continuously stir the composition during the reaction so that the composition can react stably.

The cooling step is a step of leaving the reaction-completed composition at room temperature or cooling it under a low temperature.

After the cooling step, it will be possible to carry out an inspection step of dropping sodium hydroxide and checking through the amount of precipitate produced.

It is preferable that the composition having an air purification function of the present invention prepared as described above has a pH of 4.0 to 8.0. If the pH of the composition having an air purification function of the present invention is less than 4.0 or exceeds 8.0, precipitation may occur. can

As described above, the composition having an air purification function according to the present invention can be diluted in water and sprayed on a toilet or washbasin, etc., and an air purification function is imparted by coating, immersion, etc. on wallpaper or sheet paper or advertisement paper attached to the outside. It can be applied in various ways to all products that require deodorizing and air purification functions, such as pet toilet pads and toilet sand.

As described above, the composition having an air purifying function of the present invention can impart an air purifying function to a product by various methods such as dipping, coating, and spraying. It can be applied to the product by diluting it to 1 to 5% by weight, immersing it in a pickup rate of 50 to 100%, and then heat-treating it at a high temperature. will be able to do

Hereinafter, examples of a method for preparing a composition having an air purification function according to the present invention are shown, but the present invention is not limited to the examples.

▣ Measurement method

For all evaluations, the evaluation composition is added to water to prepare a 3ows% dilution, and a nonwoven fabric having a basis weight of 150 gsm made of 100% polyester fiber is immersed in the dilution solution, and then heat-dried sheet paper at 180° C. for 100 seconds as a sample. evaluated.

When a control is required, a non-woven fabric having a basis weight of 150 gsm of 100% polyester fiber that has not been treated with any kind was used as a control, and the evaluation was performed in a test environment of 20 ° C. and 65% R.H. humidity.

1. Deodorization evaluation

* Measured by the method specified in the SEK mark textile product certification standards.

2. VOC removal evaluation

(1) Formaldehyde removal evaluation

* Measured by the gas detection tube method, 20 μg/mL of formaldehyde (HCHO) was injected into a 1000 mL container and measured

- Test environment: temperature 20 ℃, humidity 65 % R.H.

- Removal rate (%) = [(Blank gas concentration-Sample gas concentration)/Blank gas concentration]X100

(2) Evaluation of removal of other volatile organic compounds

* Measured by GC (gas chromatography) method, put a 10 cm X 5 cm sample in a 500 ml Erlenmeyer flask, add a volatile organic compound whose initial concentration was adjusted, seal it, and then sample in a syringe 2 hours later, followed by GC measurement. Measure the concentration of volatile organic compounds

3. Antimicrobial evaluation

* Antimicrobial evaluation was evaluated by measuring the bacteriostatic reduction rate after incubating Staphylococcus aureus (ATCC 6538) and Klebsiella pneumoniae (ATCC 4352) for 6 hours, 12 hours, and 18 hours.

▣ Manufacture of composition with air purification function

Examples 1-3

In the raw material mixing step, calcium chloride, copper chloride, and iron salt were added to water as shown in Table 1 according to Examples, and 12 parts by weight of glycidoxy propyl trimethoxy silane was added to 100 parts by weight of water as a crosslinking agent.

Calcium chloride hydrate was used for the calcium chloride, and divalent copper (II) chloride hydrate was used for copper chloride.

In the catalyst mixing step, imidazole as a catalyst, formic acid as a pH adjuster, and EDTA-2Na dihydrate as a sequestering agent were further added to the composition in which the raw materials were mixed in the catalyst mixing step, and 0.8 parts by weight was added to 100 parts by weight of water, respectively.

In the reaction step, the reaction was carried out while stirring at 60° C. for 120 minutes, and the composition having an air purification function of the present invention was prepared as a cooling step in which the reaction was completed and left at room temperature. The pH of the prepared composition is shown in Table 1.

division Preparation Example 1 Preparation Example 2 Preparation 3 Calcium Chloride (wt%) 7 10 15 Cupric chloride dihydrate (wt%) One 3 9 Iron salt (wt%) 0.1 One 4 composition pH 7.0 7.3 7.5

▣ Stability evaluation test of composition with air purification function

The composition having the air purifying function prepared above was stored in a thermostat at a set temperature for 7 days and then visually observed to confirm the condition of the precipitate and shown in Table 2. (X: no precipitate, ○: precipitate)

Temperature (℃) Preparation Example 1 Preparation Example 2 Preparation 3 -One X X ○ 30 X X X 40 X X X 50 X X ○ 60 X X ○ 70 X X ○ 80 X X ○ 90 X ○ ○

As shown in Table 2, in the case of Examples 1 and 2, no precipitate was generated in the temperature range of 0 to 80 ° C., but in Example 3, the precipitate was generated at less than 0 ° C. or at 50 ° C. or higher. Calcium chloride, copper chloride, iron salt It can be seen that the stability of the composition is improved when each silver is contained in the range of 1 to 9% by weight of calcium chloride dihydrate, 0.1 to 9% by weight of copper chloride, and 0.1 to 3% by weight of iron salt.

▣ Deodorization Evaluation Experiment

The deodorization properties of the composition having an air purification function of Example 2 having excellent liquid stability among the Examples prepared above were evaluated and shown in Table 3.

division Initial (ppm) After 2 hours (ppm) Decrease rate (%) hydrogen sulfide gas Example 2 4.0 ≤0.08 98 control 4.0 3.8 5 pyridine gas Example 2 12 ≤1.0 91 control 12 6.9 42.5 ammonia gas Example 2 100 4.3 95 control 100 72 28 acetic acid gas Example 2 30 2.4 92 control 30 20 33 trimethylamine gas Example 2 28 0.5 98 control 28 24 14 isovaleric acid gas Example 2 98% decrease after 2 hours indole gas Example 2 95% reduction after 2 hours nonnal gas Example 2 94% reduction after 2 hours

As shown in Table 3, in the composition having an air purification function of the present invention, hydrogen sulfide gas and trimethylamine gas exhibit a 99% reduction rate, and pyridine gas, ammonia gas, acetic acid gas, isovaleric acid gas, indole gas, and Nonenal gas are all 90 % or more, it can be seen that the deodorization property is very excellent.

▣ Volatile organic compound decomposition evaluation test

1. Measurement of Formaldehyde Removal Rate

Formaldehyde removal rate was measured through the control of the composition having an air purifying function prepared above and the deodorization evaluation experiment, and it is shown in Table 4.

time control Example 30 minutes 0% 78% 60 minutes 0% 92% 90 minutes 4% 95% or more 120 minutes 9% 95% or more

As shown in Table 4, it can be seen that the composition having the air purification function of the present invention has a very high formaldehyde removal efficiency compared to the control, and the formaldehyde removal efficiency is 95% or more after 90 minutes.

2. Measurement of removal rate of other volatile organic compounds

The removal rate of volatile organic compounds other than formaldehyde was measured through the control of the composition having an air purification function and the deodorization evaluation experiment prepared above, and it is shown in Table 5.

matter control
(ppb) Example 2
(ppb) 2-Butene 11.5 1.6 Acetonitrile 15.6 2.2 2-Methyl-2-propanol 2.7 0.2 Butanal 0.6 0 2-Butanone 2.7 0.3 Ethyl Acetate 1.5 0.2 Trichloromethane 1.6 0.2 Tetrahydro-Furan 1.1 0.5 2-Cyclopropyl-propane 0.7 0.1 Benzene 0.7 0 1,3,5-Trioxane 13.5 11.1 Methyl-Urea 302.4 0 N,N-Dimethyl-Formamide 8.6 2.5 2,4-Dimethyl-Hexane 2.2 0.5 N,N-Dimethyl-Acetamide 65.2 0.2 o-Xylene 4.0 0.1 Propylene Carbonate 6.2 0 2-Ethyl-1-hexanol 5.2 2.8

As shown in Table 5, it can be seen that the composition having the air purification function of the present invention has a lower concentration of volatile organic compounds than the control, and it can be seen that the composition having the air purification function of the present invention effectively decomposes the volatile organic compounds.

◎ Antibacterial evaluation test

Table 6 shows the antibacterial properties of the composition having an air purifying function of Example 2 having excellent liquid stability among the Examples prepared above.

strain incubation time Example 2 Staphylococcus aureus after 6 hours 77.5% after 12 hours 84.2% after 18 hours 99.9% pneumococcus after 6 hours 62.2% after 12 hours 83.9% after 18 hours 99.9%

As shown in Table 6, the composition having an air purifying function of the present invention shows that 99.9% of Staphylococcus aureus and pneumococcus are eliminated after 18 hours, indicating that the composition has excellent antibacterial properties.

Claims (6)

1 to 9% by weight of calcium chloride, 0.1 to 9% by weight of copper chloride, 0.1 to 3% by weight of iron salt contained in water, pH 4.0 to 8.0, characterized in that the liquid stability is high at 0 to 80 ℃ no precipitate is formed A composition having an air purification function. delete According to claim 1,
A composition having an air purification function, characterized in that the composition further contains a crosslinking agent. 4. The method of claim 3,
The composition having an air purification function, characterized in that 10 to 20 parts by weight of the crosslinking agent is included in 100 parts by weight of water. A raw material mixing step of adding 1 to 9% by weight of calcium chloride, 0.1 to 9% by weight of copper chloride, and 0.1 to 3% by weight of iron salt to water;
A catalyst mixing step of further adding a catalyst, a pH adjuster, and a sequestering agent to the mixed composition;
A reaction step of reacting the catalyst-mixed composition at 40-80° C. for 90-150 minutes;
To prepare a composition having an air purification function, including a cooling step of cooling the reaction-completed composition,
The composition has a pH of 4.0 to 8.0, and a method for producing a composition having an air purification function, characterized in that stability is improved at 0 to 80° C. without the formation of a precipitate. delete

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