JPH07184984A - Spraying material - Google Patents

Abstract

PURPOSE:To provide a new spraying material which is excellent in adhesiveness and stagnatability on an odoriferous body and has a function to adsorb odoriferous materials in actuality. CONSTITUTION:The ratio of the powder of the calcium phosphate in the spraying material is specified to 1 to 10wt.%, the ratio of a dispersion to 4 to 50wt.% and the ratio of an injecting as to 40 to 90wt.%. The powder of the calcium phosphate is preferably formed of spheroidal porous particles.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel spray material having a deodorizing action and a bactericidal action.

[0002]

2. Description of the Related Art Currently used deodorants include:
There are various types such as adsorption type, masking type and catalyst type.

Among them, activated carbon is widely used as the adsorption type deodorant. Activated carbon is usually used in granular form,
A general method is to put in an air-permeable container and allow an air flow containing the components to be adsorbed to flow through the container for adsorption.

When it is originally used as a deodorant, not limited to activated carbon, it is more convenient to use it in the form of powder having a large surface area effective for adsorption rather than in the form of granules. However, when activated carbon is made into powder, there is a risk that it will scatter and pollute the surroundings, or that it will be dispersed in the air and enter the human body through the mouth and nose, which may be harmful to health.

On the other hand, calcium phosphate has recently begun to be gradually utilized as a deodorant of the same adsorption type, although it is somewhat inferior to activated carbon. First of all, calcium phosphate is superior to activated carbon in that it is harmless to the human body and can adsorb components such as ammonia that are difficult to adsorb with activated carbon, and also microorganisms such as bacteria.

As a manufacturing advantage, the composition can be chemically controlled and the characteristics of the deodorant can be changed, so that granulation and molding can be freely performed. Furthermore, it can be regenerated by firing, and is white in appearance.

[0007]

In the case of calcium phosphate, when it is used as a deodorant, it is preferably used as a powder having a small particle size. However, if the powder itself is easily scattered, it is difficult to concentrate on the target object,
In addition, there are various inconveniences, such as poor retention on the target object, non-uniform spraying, and inconvenience of carrying, and thus it is not easy to use.

An object of the present invention is to provide a novel spray agent which can eliminate the above-mentioned disadvantages of calcium phosphate as a deodorant.

[0009]

In order to achieve the above object, the invention as claimed in claim 1 comprises 1 to 10 weight percent calcium phosphate powder, 4 to 50 weight percent dispersion and 40 to 95 weight percent. Characterized by having a percentage of propellant gas.

[0010]

The spray material according to the present invention having the above-described structure is used by filling it in a container equipped with an on-off valve. That is, as in the conventional use of spray-type insecticides, detergents, fungicides, etc., the container was thoroughly shaken before use to uniformly disperse the calcium phosphate powder in the dispersion liquid. After that, the spray port of the container is directed toward the target object and the button which is the valve body driving member of the on-off valve is pushed.

The object at this time is, for example, a trash box containing raw garbage, a place inside shoes, an armpit, or the like where a bad odor is likely to occur.

Then, the dispersion liquid in which the calcium phosphate is dispersed in the container is jetted from the spray port by the pressure of the jet gas to fly to the target object and adhere thereto. Of the calcium phosphate powder and the dispersion liquid adhering to the target substance, the dispersion liquid such as alcohol and water evaporates directly, and fine calcium phosphate powder remains on the target substance.

The calcium phosphate powder has a very small particle size even if it is attached to a place where it directly contacts the human body, such as in shoes or underarms, or to the human body itself. .

Further, since the average particle size of calcium phosphate is as small as 0.1 to 100 μm (micron) as described later, it enters into the small irregularities on the surface of the object and is stably held on the object. For example, when it adheres to the surface of the human body, it retains good properties on the target so that it cannot be easily removed even if it is manually wiped off.

The calcium phosphate powder adhered to the target material as described above can be mixed with various binding modes and conformations by ionic bond, van der Waals force, or interaction between dipole moments. Adsorb odorous substances such as hydrogen sulfide, trimethylamine, or methyl mercaptan, and pathogenic or antigenic fine particles such as viruses, prokaryotic cells, fungi, and pollen.

Further, the surface of calcium phosphate has a so-called wettability, in other words, it has a good hydrophilicity, so that it has an action of adsorbing water. This water adsorption action is achieved by forming calcium phosphate powder into spherical porous particles, as described below,
The so-called capillary action is added to further increase.

[0017]

EXAMPLES The spray material according to the present invention is constructed as described above, and each constituent element will be described below.

Calcium phosphate is a molar ratio of calcium and phosphorus (Ca / P ratio) of 1.0 to 2.0, preferably 1.3 to.
1.8, more preferably 1.5 to 1.67 is used. If it deviates from this molar ratio, the characteristics of calcium phosphate as a deodorant will be lost and it will be unsuitable. By the way, one with a molar ratio of 1.5 is called tricalcium phosphate, 1.67.
The one is called apatite.

The average particle size of calcium phosphate is 0.1 to 10
The one used is 0 micron, preferably 1 to 50 micron. When the average particle size of calcium phosphate is 0.1 micron or less, the calcium phosphate powder precipitates in the dispersion liquid after standing for a long time to form a hard agglomerate and the redispersibility deteriorates.
This is because if the average particle size exceeds 100 microns, the nozzle holes will be easily clogged.

The calcium phosphate powder preferably has a specific surface area of 1 to 100 m ² / g. This is because if the specific surface area is 1 m ² / g or less, the adsorption capacity becomes too low, and if it is 100 m ² / g or more, the particles become too small and unsuitable as a spray material.

The particle form is preferably spherical porous particles. By making the particle shape spherical, the fluidity of the particle is increased, and it becomes easy to redisperse the particle even after it is precipitated in the dispersion liquid.

Further, by making the particles porous, the apparent specific gravity of the particles can be reduced and the particles can be dispersed with a smaller force during stirring. Further, since malodorous substances, pathogenic or antigenic fine particles, etc. are taken into the spaces between the fine particles, their adsorption performance is increased, and also the water adsorption performance is increased by the capillary action.

As a method for producing the spherical porous particles, a usual method for granulating spherical secondary particles can be used. For example, a spray drying method, a stirring granulation method, or the like is used. The particles granulated in this way are likely to be broken in the spray dispersion if they are left as they are, so it is necessary to increase the strength of the particles (secondary particles) by sintering the raw material particles (primary particles). is there. Appropriate firing temperature is 300 to 1000 ° C. If the temperature is 300 ° C or lower, sintering hardly occurs, and if the temperature exceeds 1000 ° C, the sintering proceeds too much and the specific surface area becomes small.

On the other hand, alcohols, water and the like can be used as the dispersion liquid in which the powder of calcium phosphate is dispersed, but alcohols are more preferable in consideration of drying after spraying and spraying. As the alcohol, unmodified alcohol and denatured alcohol can be adopted. By the way, the denatured alcohol refers to a non-denatured alcohol to which a perfume ingredient or the like is added so that it cannot be drunk.

On the other hand, a normal liquefied petroleum gas, so-called LPG, can be adopted as the injection gas. Of course, in principle, other injection gas such as CFC gas can be used, except for the problem of environmental destruction.

When LPG is used as the injection gas, the injection pressure can be adjusted by changing the mixing ratio of propane and butane.

Next, the effect measurement of the spray material actually prototyped by the present inventors will be described. First, using a known method, a slurry of wet-synthesized calcium phosphate was granulated by a spray drying method, dried, and then fired to prepare a spherical porous calcium phosphate powder as shown in Table 1 below. In addition,
The firing temperature of each powder is 800 ° C for a and 60 for b.
0 ° C. and c were 400 ° C.

[0028]

[Table 1]

Next, two kinds of dispersions A and B are prepared. However, A is 99% undenatured alcohol and B is denatured alcohol.

On the other hand, LPG is used as the injection gas, and in this effect measurement, at 20 ° C., the pressure is 1.5 Kg /
A mixture of propane and butane was determined so as to be cm2.

Powders of the three types of calcium phosphates a, b and c described above, two types of dispersions A and B, and LP
G is mixed with the spray material ex. 1-e
x. 4 was prepared, and these were enclosed in an aluminum spray can having a capacity of 100 ml, and the effect measurement described below was performed. The columns of powder, dispersion and LPG in Table 2 show weight percentages.

[0032]

[Table 2]

As an effect measurement 1, the spray material of the present invention was sprayed for 5 seconds into a trash box containing raw garbage, the lid was covered, and the smell of the trash box after 3 hours was smelled by 6 people. I got it compared with the odor before injection. The results are shown in the column of effect measurement 1 in Table 3 below.

[0034]

[Table 3]

However, each evaluation of α to δ in Table 3 is as follows. That is, α: Almost no odor. (Great effect) β: It no longer smells. ...... (In effect) γ: Slightly no longer smelling. ........ (Small effect) δ: No change. ........ (no effect) In the column of effect measurement 1, the numbers below the respective evaluations of α to δ indicate the number of people evaluated in this way.

As an effect measurement 2, after the spray material of the present invention was sprayed onto the shoes of 6 persons and dried, the calcium phosphate powder remaining in the shoes was brushed off to remove the odor in the shoes. I got it compared to that before injection. The results are shown in the column of effect measurement 2 in Table 3 above.

As is clear from the results of the above sensory test, the deodorizing performance of the spray material of the present invention is remarkable. The above-mentioned sensory test is sufficient because the test as a deodorant causes the human olfaction to be a problem. This sensory test is based on Table 2 above.
Ex. 1-ex. Similar results were obtained with all four samples.

The present inventors also verified the influence of the particle shape of the calcium phosphate particles on the redispersibility as follows. That is,

A calcium phosphate slurry synthesized by a known method so as to have a Ca / P ratio of 1.5 was filtered to obtain a fine powder aggregate. The aggregate was dried in a drier at 100 ° C and then calcined at 400 ° C.

The fired body thus obtained was roughly crushed in a mortar and then finely crushed in a ball mill to prepare calcium phosphate powder having an average particle size of 5 μm. Observation with an electron microscope revealed that the powder was amorphous (crushed) porous particles. The specific surface area was about 60 m ² / g.

The calcium phosphate powder thus prepared was used as sample d, and the spray material ex. Prepare a spray material with the same formulation as in 3,
This is spray sample ex. It was set to 5.

Sample ex. 3 and ex. Each of 5 and 5 was sealed in a pressure-resistant glass spray bottle having a volume of 100 ml, and then these bottles were allowed to stand for 1 month. The spray material was enclosed in a glass bottle because it was possible to observe the inside. In these bottles after standing for 1 month, the blended powders appeared to be settled to form aggregates.

The two types of bottles were vigorously shaken 10 times each, and the state of redispersion of the precipitated powder was observed. Ex. With a powder c composed of spherical particles. In the bottle of No. 3, the precipitated particles were almost completely and uniformly dispersed in the dispersion liquid, and almost nothing remained at the bottom.

On the other hand, ex. In the bottle of No. 5, after the bottle was shaken, a ring-shaped, fairly hard agglomerate remained near the corners of the bottom circumference, and some of the particles dispersed in the dispersion were large coagulated particles. As can be seen from the above results, spherical particles obviously have better dispersibility.

[0045]

As is clear from the above description, according to the present invention, the powder of calcium phosphate is dispersed in the dispersion liquid and sprayed on the odorous substance. It is possible to obtain a new deodorizing material.

Further, since the dispersion liquid is sprayed by using the spray gas, not only can the powder material be concentrated and sprayed on the deodorizing object, but the required amount is evenly distributed over a wide object. It can be sprayed evenly.

Further, for the same reason, it is possible to easily introduce and spread the powder material into the recesses that cannot be reached by spraying, and the usage amount can be easily adjusted by adjusting the spraying time.

Further, since this deodorizing material does not utilize so-called masking but has a function of actually adsorbing odorous substances, it is possible to expect a deodorizing effect for a considerably long time per spraying.

Furthermore, since calcium phosphate is used in the form of powder, it has good adhesion to odorous substances and retention properties, so that not only the deodorizing effect is improved, but also it adheres to the human body and feels smooth and uncomfortable. It is easy to use because it does not exist. Moreover, since the powder material is not scattered, it is convenient to carry.

In addition, according to the experiments conducted by the present inventors, the powder of calcium phosphate also adsorbs antigenic and pathogenic fine particles such as viruses and fungi, so that new applications such as a pre-operative sterilizing agent are possible. You can think.

Furthermore, since the calcium phosphate powder, in particular the spherical porous particles, has good water absorbency, it has various effects such as utilization as an antiperspirant in combination with the adsorption performance of odorous substances. Play.

By making the particle shape of the calcium phosphate powder spherical, the fluidity of the powder particles is increased and the redispersibility in the dispersion is improved, so a spray material with more stable performance is obtained. Can be

Claims (2)

[Claims] 1. 1 to 10 weight percent calcium phosphate powder, 4 to 50 weight percent dispersion and 40 to
A spray material having a propellant gas content of 95 percent by weight. 2. The Ca / P ratio of the calcium phosphate is 1.
The spray material according to claim 1, wherein the spray material has a specific surface area of 0 to 2.0, a specific surface area of 1 to 100 m ² / g, an average particle diameter of 0.1 to 100 µm, and is made of spherical porous particles of calcium phosphate.