JP5409991B2 - Emulsifying dispersant and method for producing the same - Google Patents
Emulsifying dispersant and method for producing the same Download PDFInfo
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- 230000001804 emulsifying effect Effects 0.000 title claims description 18
- 239000002270 dispersing agent Substances 0.000 title claims description 17
- 238000004519 manufacturing process Methods 0.000 title description 4
- 239000000839 emulsion Substances 0.000 claims description 53
- 239000003921 oil Substances 0.000 claims description 39
- 150000002430 hydrocarbons Chemical class 0.000 claims description 36
- 239000004215 Carbon black (E152) Substances 0.000 claims description 35
- 229930195733 hydrocarbon Natural products 0.000 claims description 35
- 229920001296 polysiloxane Polymers 0.000 claims description 31
- 239000004094 surface-active agent Substances 0.000 claims description 25
- 239000000126 substance Substances 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- -1 polyoxyethylene Polymers 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 7
- 239000013078 crystal Substances 0.000 claims description 6
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims description 5
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 5
- 239000004359 castor oil Substances 0.000 claims description 5
- 235000019438 castor oil Nutrition 0.000 claims description 5
- OGQYPPBGSLZBEG-UHFFFAOYSA-N dimethyl(dioctadecyl)azanium Chemical compound CCCCCCCCCCCCCCCCCC[N+](C)(C)CCCCCCCCCCCCCCCCCC OGQYPPBGSLZBEG-UHFFFAOYSA-N 0.000 claims description 5
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 210000002472 endoplasmic reticulum Anatomy 0.000 claims 1
- 239000004615 ingredient Substances 0.000 claims 1
- 229920002545 silicone oil Polymers 0.000 description 25
- 238000004945 emulsification Methods 0.000 description 14
- DCAYPVUWAIABOU-UHFFFAOYSA-N hexadecane Chemical compound CCCCCCCCCCCCCCCC DCAYPVUWAIABOU-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 239000003995 emulsifying agent Substances 0.000 description 7
- 239000012071 phase Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 4
- 239000002105 nanoparticle Substances 0.000 description 3
- 239000002562 thickening agent Substances 0.000 description 3
- 241000446313 Lamella Species 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
Description
本発明は、シリコーン油の安定なエマルションを形成しつつ、粘度の増大を回避することが可能な乳化分散剤とその製造方法に関する。 The present invention relates to an emulsifying dispersant capable of avoiding an increase in viscosity while forming a stable emulsion of silicone oil, and a method for producing the same.
シリコーン油は、主骨格が−Ｓｉ−Ｏ−Ｓｉ−のシロキサン結合であり、側鎖にメチル基などの有機部位を有し、無機質と有機質の両方の性質を併せ持っているので、炭化水素系化合物のＣ−Ｃ結合では見られない、耐熱性、耐寒性、耐候性、電気特性、撥水性などの優れた機能性を有しており、多くの分野でエマルションとして利用され、例えば、消泡剤や、撥水剤、化粧品などに幅広く利用されている（特許文献１，２，３等）。 Silicone oil is a hydrocarbon compound because it is a siloxane bond with a main skeleton of -Si-O-Si-, has an organic moiety such as a methyl group in the side chain, and has both inorganic and organic properties. It has excellent functionality such as heat resistance, cold resistance, weather resistance, electrical properties, water repellency, etc., which is not seen in the CC bond, and is used as an emulsion in many fields. For example, an antifoaming agent And widely used in water repellents, cosmetics, etc. (Patent Documents 1, 2, 3, etc.).
しかし、シリコーン油の水系における利用は、Ｏ／Ｗ型エマルションの利用が必要となるが、シリコーン油のシロキサン骨格部位は炭化水素型界面活性剤と相溶性がないため、炭化水素型界面活性剤で乳化・安定させることは非常に困難である。
このため、シリコーン油を乳化するには、製造過程において特殊な増粘剤を加えたり、相溶性があるシロキサン部位を含有したシリコーン型界面活性剤を用いること等が考えられている。
However, the use of silicone oil in an aqueous system requires the use of an O / W emulsion. However, since the siloxane skeleton part of silicone oil is not compatible with the hydrocarbon type surfactant, it is a hydrocarbon type surfactant. It is very difficult to emulsify and stabilize.
For this reason, in order to emulsify the silicone oil, it is considered that a special thickener is added in the production process or a silicone type surfactant containing a compatible siloxane moiety is used.
ところが、増粘剤を加えても短期間でシリコーン油が二層分離し、安定に保つことができない場合が多く、また、シリコーン系界面活性剤は、それぞれのシリコーン油の種類に適したものを選定しなければうまく乳化することができない。このため、本出願人は、特殊な増粘剤の使用やシリコーン油の種類に応じたシリコーン型界面活性剤の使用を不要とし、経時安定性に優れたシリコーン型エマルションを形成する技術を先に提案している。 However, in many cases, even if a thickener is added, the silicone oil is separated into two layers in a short period of time and cannot be kept stable. Silicone surfactants should be suitable for each type of silicone oil. If it is not selected, it cannot be emulsified well. For this reason, the applicant of the present invention firstly made a technology for forming a silicone emulsion having excellent stability over time, without the use of a special thickener or the use of a silicone surfactant according to the type of silicone oil. is suggesting.
即ち、従来の界面活性剤を用いた乳化法では、油と水との界面に界面活性剤が吸着し、その界面エネルギーを低下させることを乳化・分散法の基本としていたので、その界面張力を低下させるために界面活性剤の種類を選定し、また多量の界面活性剤を必要とするものであったが、本発明者らは、油/両親媒性化合物/水系の中で独立相として存在する両親媒性化合物のナノ粒子をファンデルワールス力によりシリコーン油に付着させることで乳化を行なう三相乳化法を見出し、経時安定性に優れたシリコーン型エマルションの形成を可能にしている。
しかしながら、三相乳化法を用いることで、炭化水素型界面活性剤で乳化が困難であったシリコーン油を安定に乳化することができるが、調製したシリコーンエマルションは、経日すると粘度が増大する傾向にある。
実際、発明者らが実測した結果によれば、三相乳化法において、ポリオキシエチレン硬化ひまし油の誘導体のうちエチレンオキシドの平均付加モル数（Ｅ）が１０である誘導体（ＨＣＯ−１０）を乳化剤としてシリコーン油を乳化したところ、図１の破線に示されるように、経日によるシリコーンエマルションの粘度上昇が確認されている。
However, by using the three-phase emulsification method, it is possible to stably emulsify silicone oil that was difficult to emulsify with a hydrocarbon surfactant, but the prepared silicone emulsion tends to increase in viscosity over time. It is in.
In fact, according to the results measured by the inventors, in the three-phase emulsification method, a derivative (HCO-10) having an average added mole number (E) of ethylene oxide of 10 among polyoxyethylene hydrogenated castor oil derivatives is used as an emulsifier. When the silicone oil is emulsified, as shown by the broken line in FIG. 1, an increase in the viscosity of the silicone emulsion over time has been confirmed.
このようなシリコーンエマルションの粘度増大の原因を確認するため、ＨＣＯ−１０を用いたヘキサデカン（炭化水素油）のエマルションとシリコーンエマルションの経日変化
を観察したところ、それぞれの７日後のＴＥＭ写真から明らかなように（図２参照）、シリコーンエマルションにのみ多数のラメラ相が確認された。これは、ヘキサデカンはＨＣＯ−１０の膜内に可溶化でき、ベシクルの安定化を保つことができるが、シリコーン油は、ＨＣＯ−１０の膜内に可溶化することができないためである。
In order to confirm the cause of the increase in viscosity of such a silicone emulsion, the changes over time of the hexadecane (hydrocarbon oil) emulsion using HCO-10 and the silicone emulsion were observed. As shown (see FIG. 2), a large number of lamellar phases were confirmed only in the silicone emulsion. This is because hexadecane can be solubilized in the HCO-10 membrane and the vesicles can be stabilized, but silicone oil cannot be solubilized in the HCO-10 membrane.
換言すれば、炭化水素油エマルションは、油がＨＣＯ−１０ベシクル中に可溶化するため，ベシクルが安定化してラメラ変移しなくなることから粘度上昇が生じないが、シリコーン油は、ＨＣＯ−１０との相溶性がないため可溶化が起こらず，乳化後でもＨＣＯ−１０ベシクル単独の時と同様にラメラ変移するためである。 In other words, in the hydrocarbon oil emulsion, since the oil is solubilized in the HCO-10 vesicle, the viscosity of the vesicle does not stabilize and the lamella does not shift. This is because solubilization does not occur because of incompatibility, and lamella shifts even after emulsification as in the case of HCO-10 vesicle alone.
以上のことから、三相乳化法ではシリコーン油のように乳化剤と油の間に相溶性がなくてもエマルションを安定化させることができるが、相溶性がないシリコーン油ではラメラ化による粘度上昇が問題となっている。 From the above, the three-phase emulsification method can stabilize the emulsion even if there is no compatibility between the emulsifier and the oil as in the case of silicone oil. It is a problem.
本発明は、係る事情に鑑みてなされたものであり、シリコーン油の乳化安定性を保ちつつ、粘度上昇を防止することが可能な乳化分散剤を提供することを主たる課題としている。 This invention is made | formed in view of the situation which concerns, and makes it the main subject to provide the emulsification dispersant which can prevent a viscosity raise, maintaining the emulsification stability of silicone oil.
本発明者らは、シリコーンエマルションの経時的な粘度増加は、乳化粒子であるＨＣＯ−１０の形状変化により生じていると考察した。即ち、ＨＣＯ−１０ ベシクル粒子は水中で経時すると，より安定な針状のラメラ液晶に変移し、このラメラ液晶同士が絡み合うため粘度が上昇する。このため、ＨＣＯ−１０を乳化剤として相溶性がないシリコーン油を乳化すると、経日によるシリコーンエマルションの粘度上昇が起こる。これに対して、炭化水素油エマルションでは経時的な粘度増加現象は見られず、また、シリコーン系界面活性剤で乳化したシリコーンエマルションも粘度上昇しない。 The present inventors considered that the increase in viscosity of the silicone emulsion over time is caused by a change in the shape of emulsified particles, HCO-10. That is, the HCO-10 vesicle particles change to more stable needle-like lamellar liquid crystals over time in water, and the viscosity increases because the lamellar liquid crystals are entangled with each other. For this reason, emulsification of incompatible silicone oil using HCO-10 as an emulsifier increases the viscosity of the silicone emulsion over time. On the other hand, the viscosity increase phenomenon with time is not observed in the hydrocarbon oil emulsion, and the viscosity of the silicone emulsion emulsified with the silicone surfactant does not increase.
これらのことから、本発明者らは、シリコーン系界面活性剤で乳化したシリコーンエマルションやＨＣＯ−１０で炭化水素油を乳化した炭化水素油エマルションが経時的に粘度増加を示さない現象をうまく利用することで、経時安定性を維持しつつ経時的な粘度増加を避けることができると考えた。そして、本発明者らは、鋭意研究を重ねた結果、自発的に閉鎖小胞体を形成して油性基材表面に付着可能な両親媒性物質とシリコーン系界面活性剤とを組み合わせた乳化分散剤や、前記両親媒性物質により形成された閉鎖小胞体を主成分とする乳化分散剤で乳化された炭化水素エマルションが、シリコーン油の乳化に有用であるとの知見を得るに至り、本発明を完成するに至った。 From these facts, the present inventors make good use of the phenomenon that a silicone emulsion emulsified with a silicone surfactant or a hydrocarbon oil emulsion emulsified with a hydrocarbon oil with HCO-10 does not show an increase in viscosity over time. Thus, it was considered that an increase in viscosity over time can be avoided while maintaining stability over time. And, as a result of intensive research, the inventors of the present invention have emulsified and dispersed a combination of an amphiphilic substance capable of spontaneously forming a closed vesicle and adhering to the surface of an oily substrate and a silicone surfactant. In addition, the present inventors have obtained knowledge that a hydrocarbon emulsion emulsified with an emulsifying dispersant mainly composed of closed vesicles formed of the amphiphilic substance is useful for emulsifying silicone oil. It came to be completed.
即ち、本発明に係る乳化分散剤は、自発的に閉鎖小胞体を形成して油性基材表面に付着可能な両親媒性物質と、この両親媒性物質と混合ベシクルを形成可能とするシリコーン系界面活性剤と、により形成される混合ベシクルを主成分とし、前記両親媒性物質に対して、前記シリコーン系界面活性剤の質量分率を０．１〜０．１１としたことを特徴としている。 That is, the emulsifying dispersant according to the present invention includes an amphiphilic substance that spontaneously forms closed vesicles and can adhere to the surface of an oily substrate, and a silicone system that can form a mixed vesicle with the amphiphilic substance. The main component is a mixed vesicle formed by a surfactant, and the mass fraction of the silicone surfactant is 0.1 to 0.11 with respect to the amphiphilic substance . .
また、本発明に係る乳化分散剤は、自発的に閉鎖小胞体を形成する両親媒性物質により形成されて油性基材表面に付着する閉鎖小胞体を主成分とする乳化分散剤を用いて炭化水素油を乳化した炭化水素油エマルションを主成分とし、前記炭化水素油エマルション中の（両親媒性物質＋炭化水素油）に対する炭化水素油の質量分率を０．５〜０．８５７１とするものであってもよい。 The emulsifying dispersant according to the present invention is carbonized using an emulsifying dispersant mainly composed of closed vesicles that are formed of an amphiphilic substance that spontaneously forms closed vesicles and adhere to the surface of an oily substrate. The main component is a hydrocarbon oil emulsion emulsified with hydrogen oil, and the mass fraction of hydrocarbon oil to (amphiphile + hydrocarbon oil) in the hydrocarbon oil emulsion is 0.5 to 0.8571. It may be.
前者の構成においては、両親媒性物質に対するシリコーン系界面活性剤の質量分率を０．１〜０．１１とし、また、後者の構成においては、炭化水素油エマルション中の（両親媒性物質＋炭化水素油）に対する炭化水素油の質量分率 (Wo) を０．５〜０．８５７１とすることで、安定なエマルションを維持しつつ粘度上昇を抑えることが可能となる。 In the former configuration, the mass fraction of the silicone-based surfactant to amphiphilic substance and 0.1 to 0.11, and in the construction of the latter, the hydrocarbon oil emulsion (amphiphiles By setting the mass fraction (Wo) of hydrocarbon oil to + hydrocarbon oil to 0.5 to 0.8571, it is possible to suppress an increase in viscosity while maintaining a stable emulsion.
また、両親媒性物質は、下記の一般式（化１）で表されるポリオキシエチレン硬化ひま
し油の誘導体のうちエチレンオキシドの平均付加モル数（Ｅ）が５〜１５である誘導体が好ましい。
The amphiphilic substance is preferably a derivative having an average added mole number (E) of ethylene oxide of 5 to 15 among the derivatives of polyoxyethylene hydrogenated castor oil represented by the following general formula (Formula 1).
尚、前者の製造方法としては、自発的に閉鎖小胞体を形成して油性基材表面に付着可能な両親媒性物質とシリコーン系界面活性剤とを溶液で混合した後、溶媒を除去して混合結晶を形成する工程と、前記混合結晶に水を添加し、攪拌して混合ベシクルを形成する工程とを含むようにするとよい。 In the former production method, an amphiphilic substance that spontaneously forms a closed vesicle and adheres to the surface of the oily substrate and a silicone surfactant are mixed in a solution, and then the solvent is removed. It is preferable to include a step of forming a mixed crystal and a step of adding water to the mixed crystal and stirring to form a mixed vesicle.
以上述べたように、この発明によれば、自発的に閉鎖小胞体を形成して油性基材表面に付着可能な両親媒性物質とシリコーン系界面活性剤との混合ベシクルを主成分とする乳化分散剤や、前記両親媒性物質により形成された閉鎖小胞体を主成分とする乳化分散剤を用いて乳化された炭化水素油エマルションを主成分とする乳化分散剤を用いることで、エマルションの経時的安定性と粘度増加しない特性を兼ね備えることができ、シリコーン油の乳化安定性を保ちつつ粘度上昇防止を図ることが可能となる。 As described above, according to the present invention, an emulsification mainly composed of a mixed vesicle of an amphiphilic substance and a silicone-based surfactant that can spontaneously form a closed vesicle and adhere to the surface of an oily substrate. By using a dispersing agent or an emulsifying dispersant mainly composed of a hydrocarbon oil emulsion emulsified using an emulsifying dispersant mainly composed of closed vesicles formed of the amphiphilic substance, the time of the emulsion It is possible to combine the stability of the oil and the property of not increasing the viscosity, and it is possible to prevent the increase in viscosity while maintaining the emulsion stability of the silicone oil.
以下、この発明の実施形態を説明する。 Embodiments of the present invention will be described below.
［ＨＣＯ−１０とシリコーン系界面活性剤（ＳｉＥＯ）との混合ベシクルでのシリコーン油乳化］
シリコーン油がナノ粒子に可溶化するようにするために、ＨＣＯ−１０とＳｉＥＯとの混合ベシクルでの乳化を試みた。
この混合ベシクルは、ＨＣＯ−１０とシリコーン系界面活性剤を溶媒で混合した後、溶媒除去して混合結晶を形成する工程と、この混合結晶に所定の濃度となるように水を添加し、攪拌により混合ベシクルを形成する工程とを経て形成されるものであり、この混合ベシクルを乳化剤分散液としてシリコーン油を乳化する。
[Silicone oil emulsification in a mixed vesicle of HCO-10 and silicone surfactant (SiEO)]
Emulsification with a mixed vesicle of HCO-10 and SiEO was attempted in order to solubilize the silicone oil in the nanoparticles.
In this mixed vesicle, HCO-10 and a silicone-based surfactant are mixed with a solvent, and then the solvent is removed to form a mixed crystal, and water is added to the mixed crystal so as to have a predetermined concentration, followed by stirring. The step of forming a mixed vesicle is performed, and silicone oil is emulsified using the mixed vesicle as an emulsifier dispersion.
ＨＣＯ−１０に対して、ＳｉＥＯの質量分率Ｗｓが０．０１、０．０５、０．１、０．５となるように調製した。これらの混合ベシクルをＤＳＣ測定したところ、Ｗｓ＝０．０１、０．０５、０．１では、ＨＣＯ−１０の脱水和に由来するピークは確認でき、ベシクルの形成が認められた。しかし、０．５のみＨＣＯ−１０の脱水和点が現れなかった。このことから、ＳｉＥＯにＨＣＯ−１０が取り囲まれナノ粒子が形成できなかったと考えられる。 It prepared so that the mass fraction Ws of SiEO might be 0.01, 0.05, 0.1, 0.5 with respect to HCO-10. When these mixed vesicles were subjected to DSC measurement, when Ws = 0.01, 0.05, and 0.1, peaks derived from dehydration of HCO-10 could be confirmed, and formation of vesicles was observed. However, the dehydration point of HCO-10 did not appear only for 0.5. From this, it is considered that HCO-10 was surrounded by SiEO and nanoparticles could not be formed.
次に、これらの混合ベシクルを用いてエマルションを調製した。いずれの混合ベシクルを用いても安定に乳化できた。いずれのエマルションも調製直後の粒子径１〜２μｍであ
り、経日しても粒子径の変化は見れなかった。図３に調製したエマルションの経日による粘度変化を示す。比較としてＨＣＯ−１０単独（Ｗｓ＝０）の場合も示す。やはりＷｓ＝０．５では、数日後に水相の分離が見られ、ＳｉＥＯ単独の場合と同じ傾向が見られた。また、Ｗｓ＝０．０１や０．０５の少量では、ＨＣＯ−１０ 単独と同様に粘度上昇が見られたが、Ｗｓ＝０．１では、３０日経っても粘度上昇しなかった。
Next, an emulsion was prepared using these mixed vesicles. It was possible to stably emulsify using any mixed vesicle. All emulsions had a particle size of 1 to 2 μm immediately after preparation, and no change in the particle size was observed even after aging. FIG. 3 shows the change in viscosity over time of the prepared emulsion. As a comparison, the case of HCO-10 alone (Ws = 0) is also shown. Again, at Ws = 0.5, separation of the aqueous phase was observed after several days, and the same tendency as in the case of SiEO alone was observed. In addition, when a small amount of Ws = 0.01 or 0.05, an increase in viscosity was observed as in the case of HCO-10 alone. However, when Ws = 0.1, the viscosity did not increase even after 30 days.
また、表１に、より仔細に質量分率を変化させた場合の経日による粘度変化とエマルション安定性の結果を示す。 Table 1 shows the results of changes in viscosity with time and emulsion stability when the mass fraction is changed more finely.
これらのことから、ＨＣＯ−１０とＳｉＥＯとの混合ベシクルを用いることによりシリコーン油が可溶化でき、粘度増加しないエマルションの調製が可能であることが判る。
また、この結果から分かるように、ＨＣＯ−１０に対するシリコーン系界面活性剤（ＳｉＥＯ）の質量分率を約０．１（０．１〜０，１１）にすることが安定したエマルションを維持しつつ粘度上昇を抑える上で好ましい。
From these results, it can be seen that by using a mixed vesicle of HCO-10 and SiEO, the silicone oil can be solubilized and an emulsion that does not increase in viscosity can be prepared.
Further, as can be seen from this result, while maintaining a stable emulsion, the mass fraction of the silicone-based surfactant (SiEO) with respect to HCO-10 is about 0.1 ( 0.1 to 0.11). It is preferable for suppressing an increase in viscosity .
［乳化剤ＨＣＯ−１０を用いて乳化した炭化水素油エマルションを乳化分散剤とした場合のシリコーン油乳化］
このシリコーン油乳化分散剤は、ＨＣＯ−１０ベシクル分散液を用いて，所定量の炭化水素油を乳化し，希薄なエマルションを調製する。その後、調製した炭化水素油エマルションを乳化分散剤として，所定量の油相を撹拌により乳化する。この方法で調製したシリコーン油エマルションの概念図を図４に示す。
[Silicone oil emulsification using a hydrocarbon oil emulsion emulsified with emulsifier HCO-10 as an emulsifying dispersant]
This silicone oil emulsifying dispersant emulsifies a predetermined amount of hydrocarbon oil using an HCO-10 vesicle dispersion to prepare a dilute emulsion. Thereafter, a predetermined amount of the oil phase is emulsified by stirring using the prepared hydrocarbon oil emulsion as an emulsifying dispersant. A conceptual diagram of the silicone oil emulsion prepared by this method is shown in FIG.
この方法は、炭化水素油がエマルション化している場合，ＨＣＯ−１０ベシクルは安定
であり、炭化水素油エマルションが粘度上昇しないことから、このベシクルで安定化したエマルションの油滴粒子を乳化剤に使うもので、炭化水素油エマルション中の（両親媒性物質＋炭化水素油）に対する炭化水素油の質量分率を実験によって決定した。
質量分率を変化させた場合の経日による粘度変化とエマルション安定性の結果を表２に示す。
In this method, when the hydrocarbon oil is emulsified, the HCO-10 vesicle is stable, and the viscosity of the hydrocarbon oil emulsion does not increase. Therefore, the oil droplet particles of the emulsion stabilized with this vesicle are used as an emulsifier. Thus, the mass fraction of hydrocarbon oil to (amphiphile + hydrocarbon oil) in the hydrocarbon oil emulsion was determined by experiment.
Table 2 shows the results of changes in viscosity with time and emulsion stability when the mass fraction is changed.
この実験結果から、乳化剤ＨＣＯ−１０を用いて炭化水素油を乳化した炭化水素油エマルションを乳化分散剤として用いることによりシリコーン油が可溶化でき、粘度増加しないエマルションの調整が可能であることが判る。また、この表から分かるように、炭化水素油エマルション中の（両親媒性物質＋炭化水素油）に対する炭化水素油の質量分率 (Ｗｏ)を０．５〜０．８５７１にすることが、７日経過しても安定なエマルションを維持しつつ粘度上昇を殆どなくす上で好ましい。 From this experimental result, it can be seen that by using a hydrocarbon oil emulsion obtained by emulsifying a hydrocarbon oil using an emulsifier HCO-10 as an emulsifying dispersant, silicone oil can be solubilized and an emulsion that does not increase in viscosity can be adjusted. . Further, as can be seen from this table, it is possible to set the mass fraction (Wo) of the hydrocarbon oil to (amphiphile + hydrocarbon oil) in the hydrocarbon oil emulsion to 0.5 to 0.8571. It is preferable for eliminating a viscosity increase while maintaining a stable emulsion even after the passage of days.
Claims (3)
前記両親媒性物質は、下記の一般式（化１）で表されるポリオキシエチレン硬化ひまし油の誘導体のうちエチレンオキシドの平均付加モル数（Ｅ）が５〜１５である誘導体であり、
前記両親媒性物質に対して、前記シリコーン系界面活性剤の質量分率を０．１〜０．１１としたことを特徴とする乳化分散剤。
The amphiphilic substance is a derivative having an average added mole number (E) of ethylene oxide of 5 to 15 among derivatives of polyoxyethylene hydrogenated castor oil represented by the following general formula (Formula 1):
An emulsifying dispersant having a mass fraction of the silicone surfactant of 0.1 to 0.11 with respect to the amphiphilic substance.
前記両親媒性物質は、下記の一般式（化２）で表されるポリオキシエチレン硬化ひまし油の誘導体のうちエチレンオキシドの平均付加モル数（Ｅ）が５〜１５である誘導体であり、
前記炭化水素油エマルション中の（両親媒性物質＋炭化水素油）に対する炭化水素油の質量分率を０．５〜０．８５７１としたことを特徴とする乳化分散剤。
The amphiphilic substance is a derivative having an average added mole number of ethylene oxide (E) of 5 to 15 among derivatives of polyoxyethylene hydrogenated castor oil represented by the following general formula (Formula 2):
An emulsifying dispersant, wherein a mass fraction of hydrocarbon oil to (amphiphile + hydrocarbon oil) in the hydrocarbon oil emulsion is 0.5 to 0.8571.
前記混合結晶に水を添加し、攪拌して混合ベシクルを形成する工程と
を含むことを特徴とする乳化分散剤の製造方法。
And a step of adding water to the mixed crystal and stirring to form a mixed vesicle.
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