Development of Novel Multifunctional Cosmetic Raw Materials and Their Applications. II..DAGGER. Novel Emulsifying Method with Random Copolymer of Polyoxyethylene / Polyoxypropylene
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- MIYAHARA Reiji
- Shiseido Research Center
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- WATANABE Kei
- Shiseido Research Center
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- OHMORI Takashi
- Shiseido Research Center
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- NAKAMA Yasunari
- Shiseido Research Center
Bibliographic Information
- Other Title
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- Development of Novel Multifunctional Cosmetic Raw Materials and Their Applications(2)Novel Emulsifying Method with Random Copolymer of Polyoxyethylene/Polyoxypropylene
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Abstract
New multifunctional raw materials for cosmetics, polyoxyethylene (POE) /polyoxypropylene (POP) dimethylether [EPDME] were previously developed by the authors. The present study presents a novel emulsifying method by which ultrafine emulsions of particle size less than 100 nm can be easily prepared using EPDME. The equilibrium phase state of the water - oil - surfactant - EPDME was examinated using a phase diagram so as to clarify the underlying mechanism in the preparation of ultrafine emulsions and the results indicated the following: [1] a special microemulsion phase is formed in a region different from that of the normal microemulsion phase when oil, EPDME, surfactant and water are mixed in the proper proportions and [2] ultrafine emulsions form in a two-phase region (O + Wm) when the composite of the microemulsion phase is diluted with water. The chemical structure of EPDME is similar to that of the polyoxyethylene chain in polyoxyethylene nonionic surfactants. EPDME may thus be considered a hydrophilic co-surfactant and a special microemulsion phase is formed at high EPDME and polyoxyethylene nonionic surfactant. EPDME may possibly be distributed in the polyoxyethylene chain of the polyoxyethylene surfactant. When diluting this microemulsion phase, EPDME rapidly decreases in concentration and, in free form virtually unadsorbed onto the oil - water interface may diffuse in the bulk water phase from polyoxyethylene chains in surfactants. It would then follow that an ultrafine emulsion consisting only of nonionic surfactant and oil may form in excess.<br>
Journal
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- Journal of Oleo Science
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Journal of Oleo Science 55 (8), 403-411, 2006
Japan Oil Chemists' Society
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Keywords
Details 詳細情報について
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- CRID
- 1390001204090638464
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- NII Article ID
- 130000055547
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- NII Book ID
- AA11503337
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- ISSN
- 13473352
- 13458957
- http://id.crossref.org/issn/13458957
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- NDL BIB ID
- 7978179
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed