JP2002179980A - Celluose based resin coating composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coating composition which can absorb nitrogen oxides and sulfur oxides and shield injurious electro-magnetic waves and, in addition, solve the problem of refuse disposal at a stroke. SOLUTION: The coating composition is obtained by uniformly incorporating a powdered charcoal into a cellulose based resin coating composition and may comprise at least one additive to be selected from an iron powder and a powdered iron compound, and the powdered charcoal is preferably at least one kind to be selected from a rice bran charcoal, a coconut husk charcoal, a food leftover charcoal, a magnetic card charcoal, a charcoal, and a bamboo charcoal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a cellulose-based resin as a main component, to which pulverized coal and additives such as iron compounds and iron powder are blended, which is mainly used for painting of building materials and housing. Coating composition to be used.

[0002]

2. Description of the Related Art Conventionally, there has been a problem that air pollution caused by nitrogen oxides and sulfur oxides contained in exhaust gas of automobiles and the effect of electromagnetic waves generated from electronic devices and mobile phones on human bodies and living environments. On the other hand, so-called garbage problems such as household garbage, construction waste, industrial waste, and medical waste generated from densely populated areas have emerged.

[0003]

The inventor of the present invention focused on the above-mentioned problems and conducted intensive studies. As a result, the above-mentioned various organic wastes were subjected to high-temperature treatment and carbonized. It has been found that the charcoal possesses excellent properties of purification, and furthermore, the charcoal and the conventional charcoal or bamboo charcoal are uniformly mixed with a cellulose-based resin paint having a property of being biodegradable without pollution, so that these charcoal are possessed. It has been found that it is supported on a cellulose resin while effectively retaining the above-mentioned function. The object of the present invention is the above-mentioned various charcoal, iron,
An iron compound or the like is blended into a cellulose resin paint to absorb the nitrogen oxides and sulfur oxides, shield harmful electromagnetic waves, and solve dust problems at once. The purpose is to provide the composition to the world.

[0004]

According to the present invention, there is provided a coating composition comprising a cellulose resin paint and powdery charcoal uniformly mixed therein. 1).

[0005] In order to solve the above-mentioned problems, the present invention provides a method in which powdered charcoal and at least one additive selected from iron powder and powdered iron compound are uniformly blended in a cellulose resin paint. (Claim 2)

In order to solve the above-mentioned problems, the present invention preferably provides the coating composition, wherein the cellulose resin is cellulose acetate (claim 3).

[0007] In order to solve the above-mentioned problems, the present invention provides the above-mentioned pulverized coal which is at least one selected from rice bran coal, coconut shell charcoal, food residue coal, magnetic card charcoal, charcoal, and bamboo charcoal. It is preferable that the above-mentioned coating composition is characterized by the following (claim 4).

[0008] In order to solve the above-mentioned problems, the present invention relates to a method for producing a mixture of at least one selected from the group consisting of N-methylpyrrolidone / methanol / dichloromethane, methylene chloride / methyl alcohol and ethyl acetate. Preferably, the coating composition according to claim 1 or 2 is provided (claim 5).

[0009]

In the coating composition according to the present invention, powdered charcoal is uniformly mixed with the cellulose resin paint as described above. Uniformly applied. It is considered that the deodorizing and purifying action and the negative ion effect of the pulverized coal carried on the applied resin layer contribute to indoor air purification and fatigue recovery. Cellulose acetate, which is a cellulose resin, is obtained by acetylating cellulose, which is a natural polymer, with acetic anhydride, is also a raw material for acetate fibers, is extremely safe without toxicity, and has biodegradable properties. It is a resin that is environmentally friendly.

[0010] It has been found that iron compounds, such as iron chloride, mixed with the above-mentioned pulverized coal have an excellent adsorption effect on nitrogen oxides and sulfur oxides. This is considered to be because iron chloride forms a complex with ammonia and mercaptan. It has also been confirmed that charcoal has an effect of shielding electromagnetic waves in the range of 10 Hz to 1 GHz. By combining these additives in combination, a composite and synergistic effect can be obtained.

There are two types of charcoal: black charcoal and white charcoal. Black charcoal is obtained by carbonizing relatively soft wood such as oak or oak at 400 to 700 degrees and cooling it in a kiln. On the other hand, white charcoal, especially Bincho charcoal, is obtained by carbonizing a hard Ubamegashi tree at 1000 degrees and quenching it outside the kiln. It has been found that white coal has a uniform quality, conducts electricity, blocks electromagnetic waves, purifies water and air, and has excellent negative ion effects such as forest effects.

Activated carbon used for toxic gas protective masks, deodorants, etc. is obtained by heating charcoal with superheated steam or by intensely carbonizing wood powder that has absorbed a chemical such as zinc chloride. Very good adsorption, adsorption and sorption. In addition, when carbonizing organic materials such as rice bran, coconut shell, food residues, and magnetic cards, it was found that porous and active carbon similar to activated carbon could be obtained by heating with shielding or restricting air. In the present invention, the above-mentioned porous and highly active charcoal is blended singly or in combination thereof, thereby achieving the intended purpose.

[0013]

Next, an embodiment of the present invention will be described. That is, the coating composition according to the embodiment of the present invention is obtained by uniformly dispersing pulverized coal and other additives in a solution containing a non-toxic and non-polluting cellulosic resin as a main component. As the cellulose resin used here, it is preferable to use cellulose acetate. Cellulose acetate is obtained by acetic acid-purifying linter or high α pulp for acetate with acetic anhydride to obtain triacetate cellulose, and then aging to form secondary acetyl cellulose.
Cellulose acetate is also used as a raw material for cupra, a semi-synthetic fiber, and includes triacetate, diacetate, and 2.5-acetate in between depending on the acetic acid content.

The cellulose acetate used in the embodiment of the present invention has different solubility in a solvent depending on the degree of acetylation. In general, 2.5 acetate can dissolve secondary acetylcellulose flakes in acetone at 50 ° C. In contrast, triacetate is
Dissolve in a 90/10 mixed solvent of methylene chloride / methanol. In the embodiment of the present invention, any of the above-mentioned solvents can be used, and further, N / methylpyrrolidone / methanol / dichloromethane is used as 10/10 /
It is preferable to use powdered charcoal mixed with 75% by weight of a mixed solvent of 5% by weight of cellulose acetate in a mixed solvent of 75% by weight. However, the solvent is not limited to the above-mentioned solvent, and the use of another solvent is optional.

The ratio of the base obtained by dissolving the pulverized charcoal / cellulose acetate in a solvent is about 1/5, and the spray method
The ratio can be adjusted by changing the ratio appropriately according to the viscosity by a brushing method or a dipping method. Additives such as iron and iron compounds are added in an amount of 5 to 5% based on the total weight.
With 10% as a guide, it can be appropriately adjusted in consideration of the adhesion of the coating film to the object to be coated.

Needless to say, charcoal and bamboo charcoal powders can be used as the pulverized charcoal.
It is preferable to grind and use coconut shell charcoal, food residue charcoal, and magnetic card charcoal in order to solve the so-called dust problem. Among them, rice bran charcoal and coconut husk charcoal have a particularly effective negative ion effect. In addition, food residue charcoal is coffee, tea,
Includes okara, bread, juice pomace, fruit, rice, garbage, etc. The above-mentioned various garbage and wood are classified by type, or those obtained by high heat treatment in a mixed state and carbonized are finely pulverized by a jet airflow system, and have a particle size of about 5 to 30 μm. Is particularly preferred. In addition to the compounding agents, a dispersant, a colorant, a stabilizer, a viscosity modifier, and the like may be added.

Next, an experiment was conducted on the adsorption effect of various types of pulverized coal used as a raw material of the present invention. NH ₄ ⁺ -
^{_{N, NO 3 - -N, NO}} 2 - -N, each substance of ^{PO 4} 3- -P will be described based on the graph the results of experiments on aging to be adsorbed. 1 to 4 show prepaid card charcoal and ticket charcoal, rice bran charcoal and iron powder 10 which are magnetic card charcoal.
Tables and graphs show changes over time in which the above-mentioned substances are adsorbed on rice bran charcoal and charcoal added by weight% respectively. _NH ⁴ + _-N ^said, NO 3 - ^-N, NO
₂ ^- _-N, initial solution of ^{PO 4} 3- -P concentration 3 mg / l
The concentration after the addition of the various charcoal is measured by a spectrophotometer and the change with time of the concentration is graphed. It can be estimated that the adsorption performance is also large.

3 and 4, the magnetic card charcoal
Is NO₃ ⁻It tends to adsorb substances other than -N,
Among them PO₄ ^3--Adsorbs P very well. Against this
And rice bran charcoal is NH₄ ⁺-N, NO₃ ⁻-N, NO
₂ ⁻-N is adsorbed, but PO₄ ^3--P tends to increase
There is. This is because the phosphorus component contained in rice bran charcoal itself
It can be estimated that it was released with the passage of. Also charcoal
Is NH₄ ⁺Adsorb -N. Focusing on the above adsorption performance
For example, to obtain the deodorizing effect of ammonia
To adsorb charcoal and phosphorus components, magnetic card charcoal
To adsorb nitric acid and nitrite, like rice bran charcoal
Selective blending or selective combination of these
In addition, a paint suitable for the intended use can be obtained.

[0019]

Next, typical embodiments will be described. <Example of formulation> Cellulose acetate (degree of acetylation 61) 5% by weight Methanol 10% by weight N-methylpyrrolidone 10% by weight Dichloromethane 75% by weight Powdered charcoal Charcoal (10 to 30μ) 10% by weight Rice bran charcoal (10 to 30μ) 10 weight%

A coating composition having the above formulation was prepared and used as a test paint. The method for producing the composition,
Although not particularly limited, for example, after the powder mixture and other additives are added and uniformly dispersed while stirring the mixed solvent with a disper, a cellulose acetate resin is added, and the mixture is stirred until it is uniformly dispersed. I do.

[0021]

[Test Example] The test paint obtained in the above example was applied to a plate-like object to be coated, and as a result of observing the appearance, the surface state after the application showed a smooth mat state.
As a result of living in a house using the flooring and wall material and monitoring the result, the progress of 1 to 3 months was observed. Tendency was observed. It is presumed that these phenomena are due to the purifying action of adsorbing harmful substances contained in charcoal and the negative ion effect of generating negative ions which act on the human body.

[0022]

The cellulosic resin coating composition according to the present invention, having the above-described constitution, adsorbs nitrogen oxides and sulfur oxides to purify air, and has a deodorizing effect and a negative ion effect. In addition to creating a comfortable living environment, the charcoal generated by garbage disposal is effectively utilized, paying attention to the performance of the charcoal, such as the adsorptive action.

[Brief description of the drawings]

FIG. 1 (a) shows rice to which rice bran charcoal and 10% by weight of iron powder are added
NH in water immersed in either bran charcoal or charcoal₄ ⁺-N concentration
Is a graph showing the change over time in (b).
₄ ^3-It is a graph which shows a time-dependent change of -P density | concentration.

FIG. 2 (a) shows rice to which rice bran charcoal and iron powder 10% by weight are added.
NO in water immersed in either bran charcoal or charcoal₂ ⁻-N concentration
Is a graph showing the change over time in (b), and FIG.
₃ ⁻It is a graph which shows a time-dependent change of -N density | concentration.

FIG. 3 (a) is a graph showing the change over time of the NH ₄ ⁺ -N concentration of water in which either a prepaid card or a ticket is immersed, and (b) is a graph showing the change of the PO ₄ ^3- -P concentration. It is a graph which shows a temporal change.

4 (a), the _NO ² in water were immersed either prepaid cards and tickets - a graph showing the time course of -N concentration, (b), like _NO ³ - -N concentrations with time It is a graph which shows a change.

Claims (5)

[Claims] 1. A coating composition comprising a powdered charcoal uniformly mixed with a cellulose resin paint. 2. A coating composition characterized by uniformly mixing powdered charcoal and at least one additive selected from iron powder and powdered iron compound in a cellulose resin paint. 3. The coating composition according to claim 1, wherein the cellulose resin is cellulose acetate. 4. The coating according to claim 1, wherein the powdery coal is at least one selected from rice bran charcoal, coconut shell charcoal, food residue charcoal, magnetic card charcoal, charcoal, and bamboo charcoal. Composition. 5. The method according to claim 1, wherein the solvent is at least one selected from a mixed solvent of N-methylpyrrolidone / methanol / dichloromethane, a mixed solvent of methylene chloride / methyl alcohol and ethyl acetate. Coating composition.