JP2021110072A - Silicone film, and method of producing the same - Google Patents

Abstract

To provide a silicone film capable of adding characteristics of adsorbing and gradually releasing a vaporized constituent of an essential oil on the surface of an article such as a textile product, and capable of again adsorbing the essential oil when function lowers, and a method of producing the same.SOLUTION: A vaporized constituent 4 of an essential oil is adsorbed onto a silicone film 1 fastening on the surface of an article 6 so as to coat a porous fine particle 2. A method of producing the silicone film 1 includes: coating an article 6 with a silicone emulsion dispersed with a porous fine particle 2; removing a solvent to form the silicone film 1; and thereafter contacting a vapor of an essential oil to the silicone film 1. By this constitution, a part of the vaporized constituent 4 of the essential oil adsorbed to the silicone film 1 is adsorbed to a pore 3 of the porous fine particle 2 by transmitting through the silicone film 1. Therefore, an effect of increasing an adsorbed amount of the vaporized constituent 4 of the essential oil is obtained so that the silicone film 1 having a plenty of the vaporized constituent 4, and excelling in functionality can be obtained. In addition, the film is excellent in extended release property, and can be used for a long time by again adsorbing the vaporized constituent.SELECTED DRAWING: Figure 1

Description

The present invention relates to a silicone film having an evaporated component of an essential oil adsorbed and a method for producing the same.

Essential oils extracted from plants are used as scent components in aromatherapy for the purpose of relaxing the mind and body and promoting health and beauty. In addition, some essential oils exhibit therapeutic effects such as antibacterial action and pest repellent effects as functions, and products made of rubber that retain and use the components of the essential oil are also known.

In addition, the use of porous fine particles as a material for containing and adsorbing fragrances such as essential oils has been conventionally attempted. For example, Patent Document 1 discloses sustained-release porous fine particles in which an inclusion substance in which a supported substance such as a fragrance is coated with a permeable substance is supported on the porous fine particles.

Japanese Unexamined Patent Publication No. 2003-286196

However, in the above-mentioned conventional technique, it is difficult to maintain the effect of the essential oil for a long time with respect to the material on which the essential oil component is adsorbed. In addition, it has been difficult to restore the function of a product whose function has deteriorated after being used for a long period of time.

For example, since textile products and the like are usually used for a plurality of years, when the essential oil evaporates and the function deteriorates, a product capable of adsorbing the essential oil again to recover the function is desired. However, according to the prior art, it has not been possible to obtain a product capable of utilizing the function of such an essential oil for a long period of time.

Further, it is not easy to form a film capable of sufficiently adsorbing the evaporated component of the essential oil and releasing it slowly on the fiber surface having a thickness of several tens of microns, and the film causes a problem that the texture of the textile product or the like is impaired. There was also a point.

The present invention has been made in view of the above circumstances, and an object of the present invention is to adsorb an evaporative component of an essential oil on the surface of a textile product or other article to impart excellent functionality and to release it slowly. It is an object of the present invention to provide a silicone film which has excellent properties and can maintain excellent functionality for a long period of time.

The silicone coating of the present invention is characterized in that the evaporation component of the essential oil is adsorbed on the coating made of silicone which is coated with the porous fine particles and fixed to the surface of the article.

Further, in the method for producing a silicone film of the present invention, a silicone emulsion in which the porous fine particles are dispersed is applied to the article, the solvent is removed to form the film made of the silicone, and then the steam of the essential oil is formed. Is in contact with the coating film.

According to the silicone film of the present invention, the evaporation component of the essential oil is adsorbed on the film made of silicone which coats the porous fine particles and adheres to the surface of the article. With such a configuration, the silicone film adhered to the surface of the article covers the surface of the porous fine particles while leaving pores in the pores.

As a result, a part of the evaporation component of the essential oil adsorbed on the silicone film is permeated through the film and adsorbed by the pores of the porous fine particles. Therefore, the effect of increasing the adsorption amount of the evaporated component of the essential oil can be obtained, and a silicone film having a large amount of evaporated component and excellent functionality can be obtained.

Further, the silicone film of the present invention is excellent in sustained release property because the release of the evaporated component of the essential oil that has penetrated into the pores of the porous fine particles is delayed by the silicone film. That is, since there is a difference in the release rate between the adsorbed component in the coating film that is released relatively quickly and the adsorbed component in the pores of the porous fine particles that take a long time to release, a well-balanced sustained release effect over a long period of time. Is obtained.

Further, according to the silicone coating of the present invention, the silicone may be the solid content of a self-crosslinking silicone rubber coating-forming emulsion. As described above, when the silicone used for the silicone coating is a solid content obtained by removing the solvent of the self-crosslinking silicone rubber coating forming emulsion, a silicone rubber coating having excellent impact resilience and stretchback property is formed.

As a result, when a textile material or a textile product is used as the target article, forming a silicone rubber film on the knit enhances the fit, and forming the knit on the woven fabric gives a firm texture. That is, the texture of the fiber is not impaired by the film formation, but rather the texture can be satisfactorily improved.

Further, according to the silicone film of the present invention, the porous fine particles contain at least one selected from the group consisting of silicon dioxide, calcium silicate, apatite, alumina and zirconium phosphate, and have a particle size of 5 microns or less. It may be.

By using porous fine particles of silicon dioxide, calcium silicate, apatite, alumina, or zirconium phosphate with a particle size of 5 microns or less as the porous fine particles, even an article made of fibers having a thickness of several tens of microns can be surfaced. Can be fixed to.

Further, according to the silicone film of the present invention, the essential oil may be extracted from at least one selected from the group of rosewood, tea tree, eucalyptus globulus and eucalyptus citriodora.

By using the essential oil extracted from at least one of rosewood, tea tree, eucalyptus globulus and eucalyptus citriodora as the essential oil for adsorbing the evaporated component on the silicone film, an antibacterial effect can be imparted to the target article. .. In addition, by using the essential oil of eucalyptus citriodora, it is possible to impart a pest repellent effect to the target article.

Further, according to the silicone film of the present invention, copaiba oil may be mixed with the essential oil. By using copaiba oil in this way, it is possible to impart a pest repellent effect to the target article. Copaiba oil contains a waxy component that does not easily evaporate, and although it is difficult to evaporate it alone and efficiently adsorb it to the silicone film, it is relatively easy to evaporate rosewood, tea tree, eucalyptus globulus or eucalyptus citrio. By using the essential oil mixed with Dora, the efficiency of evaporation and adsorption can be improved.

Further, according to the silicone film of the present invention, the article may be a fiber material in the form of a thread or a cloth, or a fiber product. When a textile material or a textile product is used as a target article in this way, forming a silicone rubber film on a knit enhances the fit, and forming the knit on a woven fabric gives a firm texture. That is, the texture of the fiber is not impaired by the film formation, but rather the texture can be satisfactorily improved.

Further, according to the method for producing a silicone film of the present invention, it is a method for producing a silicone film, wherein a silicone emulsion in which the porous fine particles are dispersed is applied to the article, the solvent is removed, and the silicone is composed of the silicone. After forming the film, the vapor of the essential oil is brought into contact with the film. As a result, it is possible to efficiently produce a highly functional silicone film capable of re-adsorbing the evaporated component of the essential oil.

Specifically, textiles and other products are usually used for multiple years, so it is expected that essential oils will evaporate during the period of use and their function will deteriorate. However, according to the production method of the present invention, since the vapor of the essential oil is brought into contact with the silicone film formed in advance and adsorbed, the function can be restored by contacting the vapor of the essential oil again when the function deteriorates.

Further, in the adsorption method via steam of the present invention, unlike the method of immersing in a solution and adsorbing, there is no adsorption of components that are not released as steam, so that the evaporated components of the essential oil are repeatedly re-adsorbed without blocking the adsorption site. Can be made to.

It is a figure which shows typically the silicone film which concerns on embodiment of this invention. It is a figure which shows the vicinity of the surface of the porous fine particle of the silicone film which concerns on embodiment of this invention.

Hereinafter, embodiments relating to the silicone coating film of the present invention and the method for producing the same will be described.
FIG. 1 is a diagram schematically showing a silicone coating film 1 according to an embodiment of the present invention. FIG. 2 is a diagram showing the vicinity of the surface of the porous fine particles 2 of the silicone coating 1.

With reference to FIGS. 1 and 2, the silicone coating 1 is a coating made of silicone, which covers the porous fine particles 2 and adheres to the surface of the article 6, and the silicone coating 1 is formed by evaporation of essential oil. Component 4 is adsorbed.

The silicone used in the silicone film 1 is a polymer in which a siloxane bond consisting of silicon and oxygen is used as a skeleton and an organic group mainly composed of a methyl group is bonded to the silicon, and is rubber-like or has a property of forming a film. It is a resinous compound. For example, the silicone used in the silicone coating 1 is a silicone rubber coating-forming emulsion. Silicone rubber has high gas permeability and gas adsorption, so it is a material suitable for retaining and evaporating the contained essential oil.

Specifically, POLON-MF-56, KM-2002-L-1, KM-2002-T, KM-9772, KM-9794, POLON-MF-23, POLON-MF- manufactured by Shin-Etsu Chemical Co., Ltd. Examples thereof include silicone contained in silicone emulsions such as 40, KM-9717, X-52-8005, and X-51-1302M.

In particular, POLON-MF-56, KM-2002-L-1, KM-2002-T, KM-9772 and KM-9749 are silicone emulsions containing a self-crosslinking silicone rubber as a solid content (silicone rubber coating forming type). It is an emulsion), and can be preferably used because a silicone film 1 having excellent impact resilience and stretchback property can be formed by applying it to the article 6 and drying it.

The porous fine particles 2 are preferably any one of silicon dioxide, calcium silicate, apatite, alumina and zirconium phosphate. Further, in order to adhere to the surface of the article 6, it is preferable that the particle size is small, and it is desirable that the particle size is 5 microns or less.

By using silicon dioxide, calcium silicate, apatite, alumina, or zirconium phosphate having a particle size of 5 microns or less as the porous fine particles 2, the surface of the article 6 made of fibers having a thickness of about several tens of microns can be surfaced. The porous fine particles 2 can be fixed. That is, a silicone film 1 capable of sufficiently adsorbing the evaporated component of the essential oil and slowly releasing it is formed on the fiber surface having a thickness of about several tens of microns, and the silicone film 1 impairs the texture of the article 6 such as a textile product. There is no such thing.

Specific examples of the porous fine particles 2 of silicon dioxide include Sunsphere H-31, Sunsphere H-32, Sunsphere H-51, and Sunsphere H-52 manufactured by AGC Si-Tech Co., Ltd.
Sunsphere H-31 is preferably available because it has an average particle size of 3 microns and a specific surface area of 800 square meters / gram.

As the essential oil used in the present embodiment, it is preferable that it easily evaporates in order to be adsorbed on the silicone film 1, but when the target article 6 is a fiber, an essential oil containing a component that evaporates at 160 degrees Celsius or less is used. It is available.

As the essential oil that can be expected to be effective, in addition to general essential oils that can enjoy the scent, functional essential oils that can impart antibacterial effect and pest repellent effect can be preferably used. The search for essential oils that can impart an antibacterial effect was enthusiastically investigated by the following method.
(Search for antibacterial essential oils)

An essential oil capable of imparting an antibacterial effect was searched based on the results of an antibacterial test based on JIS L 1902. In the antibacterial property test, Staphylococcus aureus was used as the test bacterium by the bacterial solution absorption method, and the evaluation was performed by the pour plate culture method.

The sample for the antibacterial test was prepared by applying 10 microliters of various essential oils expected to have antibacterial effects to 0.4 g of autoclave sterilized cotton cloth (attached white cloth specified in JIS L 0803) as the target article 6. ..

The cotton cloth that had been autoclaved was used as a control sample, and the test was conducted under the conditions that the number of bacteria immediately after spraying the bacterial solution was about 40,000 per milliliter and the number of bacteria after culturing for 18 hours was about 20 million per milliliter. did.

As a result, the essential oils extracted from rosewood, tea tree, eucalyptus globulus and eucalyptus citriodora showed strong antibacterial activity with an antibacterial activity value exceeding 2 as a standard of antibacterial activity, as shown in Table 1. ..

In particular, for rosewood essential oil, the number of bacteria rapidly decreased to 160 per milliliter immediately after spraying the bacterial solution, showing the most immediate antibacterial effect among the evaluated essential oils.

From the above results, as the functional essential oil capable of imparting an antibacterial effect to the target article, an essential oil extracted from rosewood, tea tree, eucalyptus globulus or eucalyptus citriodora can be preferably used. Linalool, which is the main component of rosewood essential oil, and terpinen-4-ol, which is the main component of tea tree essential oil, are active against Escherichia coli, Staphylococcus aureus, and Candida.

As the essential oil capable of imparting a pest repellent effect to the target article 6, eucalyptus citriodora essential oil and copaiba oil can be used. For example, copaiba oil is obtained from copaiba balsam tree produced in the Amazon river basin and the like, and can be used as a pest repellent with high safety to the human body. However, since copaiba oil contains a waxy component that does not easily evaporate, the weight of copaiba oil was reduced by only about 20% when it was held at 160 degrees Celsius for 3 hours when it was evaporated alone.

In order to efficiently evaporate the copaiba oil and adsorb it on the silicone film, a method of mixing it with rosewood, tea tree, eucalyptus globulus or eucalyptus citriodora, which are relatively easy to evaporate, can be carried out.

The essential oil, which was a mixture of rosewood, tea tree or eucalyptus globulus and copaiba oil in equal amounts, increased the weight loss due to evaporation to about 70% when held at 160 degrees Celsius for 3 hours.

Even when the same amount of eucalyptus citriodora and copaiba oil were mixed, the weight loss increased to 56 percent. In addition to being able to evaporate efficiently, it also has the advantage of being able to impart an antibacterial effect as well as a pest repellent effect.

Therefore, an essential oil obtained by mixing copaiba oil with an essential oil extracted from at least one of rosewood, tea tree, eucalyptus globulus and eucalyptus citriodora can be preferably used as the essential oil of the present embodiment.

As the target article 6 of the present embodiment, for the heat treatment required for forming the silicone film 1 coated and fixed with the porous fine particles 2 on the surface and adsorbing the evaporated component of the essential oil on the silicone film 1. Any material may be used as long as it is durable. For example, as the article 6, any resin material, fiber material, ceramic material, metal material, or the like can be used without limitation.

When the target article 6 is a fiber material or a textile product in the form of a thread or a cloth, it can be preferably carried out because the silicone film 1 can be formed with a large surface area.
The type of fiber can be used without particular limitation as long as it can form a silicone film 1. Plant fibers such as cotton and linen, animal fibers such as hair and silk, cellulose fibers such as rayon and cupra, diacetate and triacetate. It can be selected from semi-synthetic fibers such as, polyethylene terephthalate, synthetic fibers such as nylon and acrylic, inorganic fibers such as glass fiber and carbon fiber, and mixed materials thereof.

As a method of forming the silicone film 1, a method of removing the solvent after applying the silicone emulsion in which the porous fine particles 2 are dispersed to the article 6 can be carried out.

The silicone emulsion can be used without limitation as long as it is a dispersion liquid composed of a silicone and a solvent capable of forming the porous fine particles 2 and the silicone film 1. It is desirable that the silicone emulsion contains 1 to 10 parts by weight of the porous fine particles 2 and contains 0.5 to 5 times as much silicone solid content as the porous fine particles 2.

The application of the silicone emulsion can be carried out by a general method such as brush coating, spray spraying, and dipping. The formation of the silicone film 1 by removing the solvent from the applied silicone emulsion can be carried out by natural drying or dry heat treatment.

When the target article 6 is a cloth, the steps of applying the silicone emulsion and removing the solvent can be preferably carried out by a treatment method by a pad-dry method performed by ordinary resin processing.
The adsorption of the essential oil evaporation component 4 on the silicone film 1 can be carried out by a method in which the vapor of the essential oil is brought into contact with the silicone film 1 formed on the surface of the article 6.

There is no limitation on the contact method of the essential oil vapor, but as a preferable specific method, the article 6 having the silicone film 1 formed in the closed container having sufficiently small temperature unevenness and the essential oil coexist, and the essential oil vapor is generated by heating. As a result, a method of contacting with the silicone film 1 can be mentioned.

In a closed container with sufficiently small temperature unevenness, the vapor of the essential oil is locally cooled and moves at high speed without dew condensation, so that the probability of contact with the silicone film 1 increases and efficient and uniform adsorption occurs. ..

As for the closed container, it is desirable to use a pressure-resistant and heat-resistant metal container when performing high-temperature treatment up to 160 degrees Celsius. For essential oils that evaporate at temperatures that the resin container can withstand, a resin bag with a zipper can be used as a closed container.

In the silicone emulsion in which the porous fine particles 2 are dispersed, the size of the dispersible silicone is larger than the size of the pores 3 of the porous fine particles 2, so that the silicone does not penetrate into the pores 3.
Therefore, the silicone film 1 formed by removing the solvent after being applied to the article 6 is formed by covering the surface of the porous fine particles 2 while leaving the voids of the pores 3.

When the vapor of the essential oil is brought into contact with the vapor, the evaporation component 4 of the essential oil is adsorbed inside the silicone film 1, and a part of the evaporation component 4 of the essential oil adsorbed on the silicone film 1 permeates the silicone film 1 and evaporates. As No. 5, it is adsorbed in the pores 3 of the porous fine particles 2. As a result, the effect of increasing the adsorption amount can be obtained.
Further, in the evaporation component 5 of the essential oil that has penetrated into the pores 3 of the porous fine particles 2, the release is delayed by the silicone film 1, so the sustained release property is improved.

That is, the release rate of the evaporation component 4 which is the adsorbed component in the silicone film 1 which is released relatively quickly and the evaporation component 5 which is the adsorbed component in the pores 3 of the porous fine particles 2 which take a long time to release. A well-balanced sustained-release effect can be obtained over a long period of time.

As described above, according to the present embodiment, when the silicone used for the silicone coating 1 is a solid content obtained by removing the solvent of the self-crosslinking silicone rubber coating forming emulsion, it is excellent in impact resilience and stretchback property. Silicone film 1 is formed.

As a result, when the textile material or textile product is the target article 6, the fit is enhanced by forming the rubber-like silicone film 1 on the knit as the article 6. Further, when the silicone film 1 is formed on the woven fabric as the article 6, a firm texture can be obtained. That is, the texture of the fiber is not impaired by the formation of the silicone film 1, but rather the texture can be satisfactorily improved.

Further, since the textile product and other products as the article 6 are usually used for a plurality of years, it is expected that the essential oil evaporates during the period of use and the function deteriorates. However, in the manufacturing method according to the present embodiment, the vapor of the essential oil is brought into contact with the silicone film 1 formed in advance and adsorbed. Therefore, when the function of the essential oil component is deteriorated, the vapor of the essential oil is brought into contact with the vapor of the essential oil again to perform the function. You can recover.

Specifically, the adsorption method via steam of the present embodiment does not adsorb components that are not released as vapor, unlike the conventional method of immersing and adsorbing in a solution. Therefore, the evaporation component of the essential oil can be repeatedly re-adsorbed to the silicone film 1 without blocking the adsorption site of the silicone film 1 by the component that is not released as vapor. That is, when the essential oil evaporates and the function deteriorates, the silicone film 1 suitable for long-term use can be obtained by adsorbing the essential oil again and recovering the function.

Hereinafter, examples and comparative examples of the present invention will be described, but the present invention is not limited to these examples and comparative examples.

(Example 1)
The silicone emulsion was adjusted to have a composition of Sunsphere H-31: 2.5 parts by weight, POLON-MF-56: 7.5 parts by weight, and water: 90 parts by weight. A cotton cloth (attached white cloth specified in JIS L 0803) as an article 6 was immersed in this liquid, excess liquid was removed using a mangle at a squeezing ratio of 100%, and the mixture was allowed to stand horizontally on a flat shelf and air-dried.

A dryer in which 30 grams of cotton cloth on which the silicone film 1 was formed and 2.1 ml of eucalyptus citriodora essential oil were separated and coexisted in a stainless steel airtight container having a capacity of 3 liters and set at 160 degrees Celsius. It was held in the container for 1 hour to bring the essential oil vapor into contact with the cotton cloth.

When the cotton cloth was taken out after allowing the stainless steel airtight container to cool at room temperature, the evaporative component of the eucalyptus citriodora essential oil was adsorbed and the cotton cloth became a uniform pale yellow color, and the scent of the essential oil was emitted. Further, from the weight loss of the essential oil of eucalyptus citriodora placed in the closed container, it was confirmed that 71.1% was evaporated and used for adsorption to the silicone film.

(Example 2)
The silicone emulsion was adjusted to have a composition of Sunsphere H-31: 2.5 parts by weight, POLON-MF-56: 7.5 parts by weight, and water: 90 parts by weight. A cotton cloth (attached white cloth specified in JIS L 0803) as an article 6 was immersed in this liquid, excess liquid was removed using a mangle at a squeezing ratio of 100%, and the mixture was allowed to stand horizontally on a flat shelf and air-dried.

30 grams of cotton cloth on which the silicone film 1 was formed in this way and an essential oil obtained by mixing 1.5 ml of copaiba oil and 1.5 ml of rosewood essential oil were separated and coexisted in a closed stainless steel container having a capacity of 3 liters. , The essential oil vapor was brought into contact with the cotton cloth by holding it in a dryer set at 160 ° C. for 1 hour.

When the cotton cloth was taken out after allowing the stainless steel airtight container to cool at room temperature, the evaporative components of copaiba oil and rosewood essential oil were adsorbed on the cotton cloth to give a uniform pale yellow color, and the scent of the essential oil was emitted. Further, from the weight reduction of the mixed essential oil placed in the closed container, it was confirmed that 61.4% was evaporated and used for adsorption to the silicone film.

(Antibacterial evaluation)
The cotton cloths of Examples 1 and 2 were subjected to an antibacterial property test by a bacterial solution absorption method based on JIS L 1902 using an untreated cloth as a control sample. Staphylococcus aureus was used as the test bacterium and evaluated by the mixed plate culture method. For each sample, the number of bacteria measured immediately after inoculation and after culturing for 18 hours and the antibacterial activity value calculated based on them are shown in Table 2.

From this result, the cotton cloths of Examples 1 and 2 show antibacterial activity values of 5.0 and 5.2, respectively, and have a strong antibacterial property whose antibacterial activity value, which is a standard of antibacterial property, greatly exceeds 2. Was confirmed.

(Mosquito repellent test)
The cotton cloths of Example 1 and Example 2 were subjected to a mosquito repellent test using an untreated cloth as a control sample. Under the conditions of 25 degrees Celsius and 70-80% humidity, 30 adult female Aedes albopictus were released into a mosquito breeding gauge with a width, depth and height of 30 cm each, and were placed on the monitor's arm in this gauge. The tubular sample was exposed for 2 minutes.

The repellent rates of the cotton cloths of Example 1 and Example 2 calculated from the number of mosquitoes perched on the sample during this period were 88.9% and 83.3%, respectively. From these results, it was confirmed that the cotton cloths of Examples 1 and 2 had a mosquito repellent effect.

(Comparative Example 1)
30 grams of untreated cotton cloth (white cloth attached to JIS L 0803) and essential oil, which is a mixture of 1.5 ml of copaiba oil and 1.5 ml of rosewood essential oil, coexist in a sealed stainless steel container with a capacity of 3 liters. The oil was kept in a dryer set at 160 ° C. for 1 hour to bring the essential oil vapor into contact with the cotton cloth.

When the cotton cloth was taken out after allowing the stainless steel airtight container to cool at room temperature, the cotton cloth was not colored and the scent could not be detected. From this result, it was confirmed that the evaporated component of the essential oil could not be adsorbed on the untreated cotton cloth.

(Comparative Example 2)
An attempt was made to adsorb the evaporative component using the porous fine particles as a carrier of the essential oil, and then to coat the porous fine particles with silicone and fix them on the surface of the article by the following method.

2 grams of Sunsphere H-31 and 2 milliliters of eucalyptus citriodora essential oil were separated and coexisted in a 3 liter stainless steel airtight container and held in a dryer set at 160 degrees Celsius for 3 hours. The essential oil vapor was brought into contact with Sunsphere H-31.

When the sunsphere H-31 was taken out after allowing the stainless steel airtight container to cool at room temperature, the sunsphere H-31 adsorbed the evaporative component of the eucalyptus citriodora essential oil and became a uniform pale yellow color, giving off the scent of the essential oil. It was diverging.

Further, from the weight loss of the essential oil of eucalyptus citriodora placed in the closed container, it was confirmed that 79.5% was evaporated and used for adsorption to Sunsphere H-31.

When an attempt was made to adjust the silicone emulsion with the composition of Sunsphere H-31: 2.5 parts by weight, POLON-MF-56: 7.5 parts by weight, and water: 90 parts by weight, Sunsphere H-31 aggregated. As a result, a stable emulsion could not be formed.

Further, a cotton cloth (attached white cloth specified in JIS L 0803) was dipped in this liquid, excess liquid was removed using a mangle at a squeezing ratio of 100%, and the mixture was allowed to stand horizontally on a flat shelf and air-dried. However, the agglomerated sunsphere H-31 could not be fixed to the cotton cloth, and the scent of the essential oil was not emitted from the treated cotton cloth.

From this result, it was found that the surface of the porous fine particles adsorbed with the evaporated component of the essential oil became hydrophobic and aggregated at the stage of adjusting the silicone emulsion, so that the porous fine particles could not be adhered to the surface of the article by coating with silicone.

(Example 3)
An attempt was made as follows to form a silicone film 1 on the surface of the silk stall as the article 6, adsorb the evaporation component 4 of the lavender essential oil, and further adsorb it after use for a certain period of time.

The silicone emulsion solution is adjusted to a composition of Sunsphere H-31: 1.5 parts by weight, POLON-MF-56: 4.5 parts by weight, and water: 94 parts by weight, and about 50 g of silk stall is immersed in this solution. The excess liquid was removed at a squeezing rate of 100%, and the mixture was allowed to stand horizontally on a flat shelf and air-dried.

The silk stall on which the silicone film 1 was formed in this way and the cotton non-woven fabric impregnated with 0.3 ml of lavender essential oil were put together in a polyethylene bag with a chuck and left in the sunlight for 3 hours to remove the lavender essential oil. The steam was adsorbed on the silicone film.
When this silk stole was taken out of the bag only when it was used and stored in a sealed bag, it was possible to detect that the scent of lavender was emitted for about half a year.

After that, the scent of silk stall became weaker, so I put it in a polyethylene bag with a chuck together with a cotton non-woven fabric soaked with 0.3 ml of lavender essential oil again, and left it in sunlight for 3 hours to adsorb the vapor of lavender essential oil. However, the scent of lavender emitted has been restored.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.

1 Silicone film 2 Porous fine particles 3 Pore 4 Evaporative component 5 Evaporative component 6 Article

Claims (7)

A silicone coating characterized in that the evaporative component of an essential oil is adsorbed on a coating made of silicone that is coated with porous fine particles and adheres to the surface of an article. The silicone coating according to claim 1, wherein the silicone is a solid content of a self-crosslinking silicone rubber coating-forming emulsion. The porous fine particles contain at least one selected from the group consisting of silicon dioxide, calcium silicate, apatite, alumina and zirconium phosphate, and have a particle size of 5 microns or less. The silicone coating according to claim 2. The essential oil according to any one of claims 1 to 3, wherein the essential oil is extracted from at least one selected from the group consisting of rosewood, tea tree, eucalyptus globulus and eucalyptus citriodora. The silicone coating described. The silicone coating according to claim 4, wherein the essential oil is mixed with copaiba oil. The silicone coating according to any one of claims 1 to 5, wherein the article is a textile material in the form of a thread or a fabric, or a textile product. The method for producing a silicone film according to any one of claims 1 to 6.
A silicone emulsion in which the porous fine particles are dispersed is applied to the article, the solvent is removed to form the film made of the silicone, and then the vapor of the essential oil is brought into contact with the film. Method for manufacturing silicone film.

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