JP2000279799A - Microcapsule - Google Patents
MicrocapsuleInfo
- Publication number
- JP2000279799A JP2000279799A JP11090485A JP9048599A JP2000279799A JP 2000279799 A JP2000279799 A JP 2000279799A JP 11090485 A JP11090485 A JP 11090485A JP 9048599 A JP9048599 A JP 9048599A JP 2000279799 A JP2000279799 A JP 2000279799A
- Authority
- JP
- Japan
- Prior art keywords
- microcapsule
- titanium oxide
- volatile substance
- wall film
- substance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
- Manufacturing Of Micro-Capsules (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Cosmetics (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は芳香剤や脱臭剤等の
気散性物質を封入したマイクロカプセルおよびこのマイ
クロカプセルからの気散性物質の放出制御方法に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microcapsule enclosing a gas-permeable substance such as a fragrance and a deodorant, and a method for controlling the release of the gas-permeable substance from the microcapsule.
【０００２】[0002]
【従来の技術】従来から、悪臭を和らげたり取り除くた
めに芳香剤や脱臭剤が用いられている。また、飛来する
虫などを永続的に避けたり殺したりする防虫剤や殺虫剤
が用いられている。これらの気散性物質は製造直後にガ
ス透過性の小さい容器あるいは包装材料に充填され、使
用者が開封するまで気散性物質の蒸散を抑制し、開封後
その機能を発揮するようになされている。しかしこの方
法では開封後すぐに環境条件、通常温度により決まる一
定速度で速やかに気散性物質が気散するために、気散速
度を制御するのは難しい。2. Description of the Related Art Conventionally, fragrances and deodorants have been used to reduce or eliminate malodors. Insect repellents and insecticides that permanently avoid or kill flying insects have been used. These air-permeable substances are filled into a container or packaging material having a small gas permeability immediately after production, to suppress the evaporation of the air-permeable substances until the user opens the package, and to perform its function after opening. I have. However, with this method, it is difficult to control the air diffusion rate because the air-diffusible substance is quickly air-dispersed immediately after opening at a constant rate determined by environmental conditions and normal temperature.
【０００３】これらを改善するために気散性物質を樹
脂、セラミック、ゲル化材料等で構成された担持物質に
固定化し、気散性の大きい質を徐々に気散させるという
方法が開発された。なかでもマイクロカプセルを使用し
たものは気散性物質の効果を長持ちさせるのに成功して
いる。しかしながら、温度が高い等の条件では気散性物
質の放出速度が速く効果が短期であったり、逆に温度が
低い場合には放出速度が遅く効果が低かったり、時には
効果が現れないなど、使用する環境によって効果の有効
期間が一定でないという問題点があった。[0003] In order to improve these, a method has been developed in which an air-permeable substance is immobilized on a carrier material composed of a resin, ceramic, gelling material or the like, and a substance having a high air-permeability is gradually diffused. . Among them, those using microcapsules have succeeded in prolonging the effect of the air-diffusing substance. However, when the temperature is high, the release rate of the gaseous substance is fast and the effect is short-term.On the other hand, when the temperature is low, the release rate is slow and the effect is low. There is a problem in that the effective period of the effect is not constant depending on the environment in which it is performed.
【０００４】[0004]
【発明が解決しようとする課題】そこで本発明は、温度
など使用する環境にかかわらず気散性物質の放出速度を
制御するのに適したマイクロカプセルおよび放出速度の
制御手段の提供を課題とする。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a microcapsule suitable for controlling the release rate of a diffusible substance regardless of the environment in which it is used, such as temperature, and means for controlling the release rate. .
【０００５】[0005]
【課題を解決するための手段】上記課題は、気散性物質
を内包した有機物壁膜を有するマイクロカプセルに、酸
化チタンを包含及び／又はコーティングしこのマイクロ
カプセルに紫外線を照射することにより、気散性物質の
放出速度を制御することができることを見出し本発明を
完成した。The object of the present invention is to provide a microcapsule having an organic material wall film enclosing a gas-permeable substance, containing and / or coating titanium oxide, and irradiating the microcapsule with ultraviolet rays. The present inventors have found that the release rate of a diffusible substance can be controlled and completed the present invention.
【０００６】酸化チタンはマイクロカプセルのスラリー
に混合しマイクロカプセルの壁膜の外側にコーティング
する、あるいは酸化チタンを気散性物質とともにマイク
ロカプセル化して内包させる。酸化チタンは紫外線が照
射されると光触媒の機能を生じ、活性酸素などにより有
機物を分解する。その程度はある範囲では照射紫外線の
強度に比例し、太陽光や室内の蛍光灯に含まれる微弱な
紫外線でも光触媒作用を発揮する。酸化チタンをマイク
ロカプセル壁膜の内外に有するマイクロカプセルは、紫
外線の照射強度を制御することにより、壁膜の分解速度
が制御できるから、これにより、内包された気散性物質
の放出速度を制御することができる。[0006] Titanium oxide is mixed with a slurry of microcapsules and coated on the outside of the wall film of the microcapsules, or titanium oxide is microencapsulated together with a gas-permeable substance and included therein. Titanium oxide has a photocatalytic function when irradiated with ultraviolet light, and decomposes organic substances by active oxygen or the like. In a certain range, the degree is proportional to the intensity of the irradiated ultraviolet light, and the photocatalytic action is exerted even by weak ultraviolet light contained in sunlight or indoor fluorescent lamps. Microcapsules containing titanium oxide inside and outside the microcapsule wall film can control the decomposition rate of the wall film by controlling the irradiation intensity of ultraviolet light, thereby controlling the release rate of the encapsulated air-permeable substance. can do.
【０００７】[0007]
【発明の実施の形態】酸化チタンを内包させる場合は、
マイクロカプセル壁膜は酸化チタンの光触媒機能を励起
する約３８０nmの紫外線に透過性の良い壁膜とすること
が好ましい。多くのマイクロカプセル壁膜材料は実質的
にこの領域に透明であるから、実際上はマイクロカプセ
ル化しやすい、コアセルベーション方によるゼラチンや
カゼンインの蛋白質壁膜、in-situ重合法による尿素ホ
ルムアルデヒド樹脂、メラミンホルムアルデヒド樹脂な
どのアミノ樹脂壁膜、界面重合法によるポリイソシアネ
ートとポリオールからなるウレタン系樹脂壁膜などを使
用することができる。また、酸化チタンを包含及び／又
はコーティングしたマイクロカプセルと従来の気散性物
質を包含したマイクロカプセルを併用しても何ら問題は
ない。BEST MODE FOR CARRYING OUT THE INVENTION When encapsulating titanium oxide,
The microcapsule wall film is preferably a wall film having good permeability to ultraviolet rays of about 380 nm that excite the photocatalytic function of titanium oxide. Many microcapsule wall materials are practically transparent in this area, so they are actually easy to microencapsulate, such as gelatin or kazenin protein wall by coacervation method, urea formaldehyde resin by in-situ polymerization method, An amino resin wall film such as a melamine formaldehyde resin, a urethane resin wall film composed of a polyisocyanate and a polyol by an interfacial polymerization method, and the like can be used. In addition, there is no problem if microcapsules containing and / or coated with titanium oxide are used in combination with microcapsules containing conventional air-permeable substances.
【０００８】本発明のマイクロカプセルは、スラリーの
まま紫外線を透過する上部の空いた容器に入れて利用し
たり、スラリーを凍結乾燥、噴霧乾燥などにより粉体と
して容器中に入れて利用したり、スラリーを必要に応じ
てポリビニルアルコール等の結着剤とともに、紙やフィ
ルム状支持体に塗布乾燥しシート状あるいは適当な形に
整形する等の方法で利用することができる。[0008] The microcapsules of the present invention can be used in the form of a slurry in a vacant container through which ultraviolet rays can pass, or can be used as a powder by freeze-drying or spray-drying. The slurry can be used together with a binder such as polyvinyl alcohol, if necessary, by applying it to a paper or film-like support, drying and shaping it into a sheet or an appropriate shape.
【０００９】酸化チタンを包含及び／又はコーティング
したマイクロカプセルは、酸化チタンに４００nmより短
波長、特に３８０nm付近の紫外線が当たると、電子（ｅ
−）と正孔（ｈ＋）が酸化チタン結晶中にできる。空気
中の酸素は電子をもらい還元反応が起こり、活性な酸素
であるスーパーオキサイドアニオン（Ｏ２−）ができ
る。一方、正孔が酸化チタン表面に存在する吸着水を酸
化しヒドロキシラジカル（・ＯＨ）ができる。酸化力の
大きいこれらの化学種は有機物を分解する能力を持つた
め、本発明のマイクロカプセルは紫外線を含む光が照射
されると分解する。分解の速度は光の照射量と比例する
ため温度等の環境に影響されることなく一定の速度で分
解される。本発明のマイクロカプセルは光が照射ととも
に外側のマイクロカプセルが分解され、徐々に中側にも
光が照射されるようになる。そのため、気散性物質が壁
膜の分解に応じた速度で放出される。The microcapsules containing and / or coated with titanium oxide emit electrons (e) when the titanium oxide is irradiated with ultraviolet light having a wavelength shorter than 400 nm, especially around 380 nm.
−) And holes (h +) are formed in the titanium oxide crystal. Oxygen in the air receives electrons to cause a reduction reaction, and a superoxide anion (O 2 −) which is active oxygen is formed. On the other hand, the holes oxidize the adsorbed water present on the surface of the titanium oxide to form hydroxy radicals (.OH). Since these chemical species having high oxidizing power have a capability of decomposing organic substances, the microcapsules of the present invention decompose when irradiated with light including ultraviolet rays. Since the decomposition speed is proportional to the light irradiation amount, the decomposition is performed at a constant speed without being affected by the environment such as the temperature. In the microcapsules of the present invention, the outer microcapsules are decomposed as the light is irradiated, and the light is gradually irradiated to the inner side. Therefore, the air-permeable substance is released at a rate corresponding to the decomposition of the wall film.
【００１０】気散性物質としては、従来使用されている
気散性物質であれば良く、具体的には芳香剤としては、
レモン油、ピぺロナール、バニリン、フェニルエタノー
ル、ヒドロキシシトロネラール等、脱臭剤としてはグリ
オキザール、シュウ酸、マレイン酸エステル、エチレン
オキサイド、アルカノールアミン、P−シメンパーオキ
サイド、ホウ酸エステル、樹木の乾留エキス、茶樹の葉
抽出エキス等、防虫殺虫剤としてはブチルチオメチルジ
エチルホスホロジチオエート、ジエチルエチルチオエチ
ルホスホロジチオエート、イソボルニルチオシアノアセ
テート、ジブチルサクシネート、ジエチルトルアミドジ
エチルフタレートなどである。The air-diffusing substance may be any conventionally used air-diffusing substance. Specifically, as the fragrance,
Glyoxal, oxalic acid, maleic acid ester, ethylene oxide, alkanolamine, P-cymene oxide, boric acid ester, etc. Extracts, tea tree leaf extract extracts, etc. is there.
【００１１】[0011]
【実施例】以下に実施例を示して本発明をより具体的に
説明するが、勿論これらに限定するものではない。 （実施例）３％のエチレン−無水マレンイ酸共重合体水
溶液１００部に尿素１０部、レゾルシン１．２部を溶解
しＰＨを４．３に調整し、更にメチル化メチロールメラ
ミンを２０部溶解した。温度を４５℃にして、この水溶
液中にピペロナール１００部を混合し乳化機で乳化して
平均粒径５μmの乳化液を得た。この液に希釈水５０部
と３７％ホルムアルデヒド溶液２５部を加えて加温し、
６５℃に達してから３時間カプセル壁形成反応を続け
た。反応終了後３０℃に冷却し、２９％アンモニア水溶
液で残留ホルムアルデヒドを中和し、マイクロカプセル
スラリー（Ａ）を得た。ついで平均粒子径１ミクロンの
酸化チタン５０部を上記マイクロカプセルスラリーに加
え、攪拌機で１時間攪拌し、マイクロカプセルの表面に
酸化チタン微粒子をコーティングし、マイクロカプセル
スラリー（Ｂ）を得た。The present invention will be described in more detail with reference to the following Examples, but it should be understood that the present invention is by no means restricted thereto. (Example) 10 parts of urea and 1.2 parts of resorcinol were dissolved in 100 parts of a 3% aqueous solution of ethylene-malenic anhydride copolymer to adjust the pH to 4.3, and 20 parts of methylated methylolmelamine were further dissolved. . At a temperature of 45 ° C., 100 parts of piperonal was mixed into this aqueous solution and emulsified by an emulsifier to obtain an emulsion having an average particle size of 5 μm. 50 parts of dilution water and 25 parts of a 37% formaldehyde solution were added to this solution and heated,
After the temperature reached 65 ° C., the capsule wall forming reaction was continued for 3 hours. After completion of the reaction, the mixture was cooled to 30 ° C., and the remaining formaldehyde was neutralized with a 29% aqueous ammonia solution to obtain a microcapsule slurry (A). Then, 50 parts of titanium oxide having an average particle diameter of 1 micron was added to the microcapsule slurry, and the mixture was stirred for 1 hour with a stirrer to coat the surface of the microcapsules with titanium oxide fine particles to obtain a microcapsule slurry (B).
【００１２】このマイクロカプセルスラリー（Ａ）およ
び（Ｂ）を表面を親水化したポリエチレンテレフタレー
トフィルム上に、メイヤーバーで塗布し乾燥して、固形
分で１５ｇ／ｍ2の塗工層を有するフィルム（Ａ）とフ
ィルム（Ｂ）を得た。このフィルム（Ａ）および（Ｂ）
を、別々に上部を開放した紫外線を透過する無色透明の
容器中に吊し、この容器を室温５℃の冷たい部屋に置
き、１日２０時間蛍光灯を照射し、１０時間おきに芳香
の発生程度を官能試験で評価した。結果を表１に表す。 ○：十分な芳香がほぼ一定に持続する。 ×：僅かな芳香はするものの、極めて弱い。The microcapsule slurries (A) and (B) are coated on a polyethylene terephthalate film having a hydrophilic surface by using a Meyer bar and dried to obtain a film having a coating layer having a solid content of 15 g / m 2 ( A) and a film (B) were obtained. This film (A) and (B)
Were separately suspended in a colorless and transparent container having an open top and transmitting ultraviolet light, and this container was placed in a cold room at room temperature of 5 ° C., irradiated with a fluorescent lamp for 20 hours a day, and generated fragrance every 10 hours. The degree was evaluated by a sensory test. The results are shown in Table 1. ：: Sufficient aroma lasts almost constant. ×: Very fragrant but very weak.
【００１３】[0013]
【表１】 [Table 1]
【００１４】（結果）フィルム(Ａ)は、二酸化チタンを
コーティングしていないので、マイクロカプセルによる
封入効果がでて、この温度では実質的に芳香は放出され
ていない。これに対し、フィルム(Ｂ)は、最初の１０時
間目は殆ど芳香の放出が感じられなかったが、次の１０
時間目からは、蛍光灯中の紫外線により酸化チタンがマ
イクロカプセルの有機物壁膜を分解し、芳香物質一定速
度で放出されていた。(Results) Since the film (A) is not coated with titanium dioxide, it has an encapsulating effect by microcapsules, and substantially no fragrance is released at this temperature. On the other hand, in the film (B), almost no fragrance was released during the first 10 hours.
From the time, the titanium oxide was decomposed by the ultraviolet light in the fluorescent lamp to decompose the organic material wall film of the microcapsule, and the aromatic substance was released at a constant rate.
【００１５】[0015]
【発明の効果】本発明のマイクロカプセルは光の照射に
よってマイクロカプセルに包含あるいはコーティングし
た酸化チタンが光の照射によってマイクロカプセル壁膜
を分解し、内部に封入した気散性物質が環境温度に関わ
らず一定の速度で放出させることができた。According to the microcapsules of the present invention, the titanium oxide contained or coated in the microcapsules by irradiation of light decomposes the wall of the microcapsules by irradiation of light, and the air-permeable substance encapsulated in the microcapsules depends on the ambient temperature. Could be released at a constant rate.
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 4G005 AA01 AB05 AB14 AB25 AB27 BA03 BB15 DA12X DA12Z DB06Z DB07Z DC12X DC13Y DC24X DC48Y DD05Z DD08W DD08Z DD10Y DD12W DD33Z DD60W EA05 4H011 AC01 BA01 BB06 BB17 BC18 BC19 DA06 DF01 ──────────────────────────────────────────────────続 き Continued from the front page F term (reference) 4G005 AA01 AB05 AB14 AB25 AB27 BA03 BB15 DA12X DA12Z DB06Z DB07Z DC12X DC13Y DC24X DC48Y DD05Z DD08W DD08Z DD10Y DD12W DD33Z DD60W EA05 4H011 AC01 BA01 BB06 BB17 BC18 BC19
Claims (2)
るマイクロカプセルにおいて、前記マイクロカプセルに
酸化チタンを包含及び／又はコーティングすることを特
徴とするマイクロカプセル。1. A microcapsule having an organic material wall film enclosing an air-permeable substance, wherein the microcapsule contains and / or coats titanium oxide.
を照射することによる気散性物質の放出制御方法。2. A method for controlling the release of a gas-permeable substance by irradiating a microcapsule according to claim 1 with ultraviolet light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09048599A JP4200583B2 (en) | 1999-03-31 | 1999-03-31 | Micro capsule |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09048599A JP4200583B2 (en) | 1999-03-31 | 1999-03-31 | Micro capsule |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000279799A true JP2000279799A (en) | 2000-10-10 |
| JP4200583B2 JP4200583B2 (en) | 2008-12-24 |
Family
ID=13999863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09048599A Expired - Fee Related JP4200583B2 (en) | 1999-03-31 | 1999-03-31 | Micro capsule |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4200583B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020515380A (en) * | 2016-12-22 | 2020-05-28 | フイルメニツヒ ソシエテ アノニムＦｉｒｍｅｎｉｃｈ Ｓａ | Microcapsules with inorganic layer |
| CN111527191A (en) * | 2017-12-21 | 2020-08-11 | 奇华顿股份有限公司 | Encapsulated perfume compositions and methods of making same |
-
1999
- 1999-03-31 JP JP09048599A patent/JP4200583B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020515380A (en) * | 2016-12-22 | 2020-05-28 | フイルメニツヒ ソシエテ アノニムＦｉｒｍｅｎｉｃｈ Ｓａ | Microcapsules with inorganic layer |
| JP7078629B2 (en) | 2016-12-22 | 2022-05-31 | フイルメニツヒ ソシエテ アノニム | Microcapsules with an inorganic layer |
| CN111527191A (en) * | 2017-12-21 | 2020-08-11 | 奇华顿股份有限公司 | Encapsulated perfume compositions and methods of making same |
| CN111527191B (en) * | 2017-12-21 | 2021-12-31 | 奇华顿股份有限公司 | Encapsulated perfume compositions and methods of making same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4200583B2 (en) | 2008-12-24 |
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