The Excellent Water-Solubility of N-[3-(dimethyl-amino)propyl] docosanamide Chloride : The Most Eco-friendly Cationic Hair Conditioning Agent

スポンサーリンク

概要

• 論文の詳細を見る

• A new hair-conditioning agent, N-[3-(dimethylamino)propyl]docosanamide (APA-22) hydrochloric acid salt (APA-22 HCl), has excellent solubility in water with a solubility limit over 10-times larger than that of other APA hydrochloric salts with shorter alkyl chain lengths. The physicochemical characteristics of APA-22 HCl were studied at 25°C by using equilibrium surface tension (γ), solubilization of an oil-soluble dye, steady-state fluorescence, and chloride ion selective electrode techniques. The APA-22 HCl salt is considered to form an aggregate at a concentration, C1, which is about twice the concentration of the solubility limit of APAs with shorter alkyl chains. At a higher concentration, C2, the aggregates of APA-22 HCl start forming another kind of aggregate, which is able to solubilize oil-soluble materials. That is, C1 is considered to represent the critical aggregation concentration (cac) and C2 a morphology transition. In the concentration region between C1 and C2 the solutions are seemingly transparent whereas at above C2 they appear bluish or translucent. Since the Krafft point of APA-22 HCl is 55°C, all the solutions, including the aggregates, are thought to exist in metastable states. Notably, however, these metastable solutions do not change significantly over a few months. The excellent solubility of APA-22 HCl in water is considered to be a result of this unique stepwise aggregation with increasing concentration.

• 日本油化学会の論文

著者

• Nishiyama Naohiro

  Safety And Environmental Research Center Kao Corporation

• Yamane Masayuki

  Safety Science Research Laboratories, Kao Corporation

• Toyo Takamasa

  Safety Science Research Laboratories, Kao Corporation

• Inoue Katsuhisa

  Material Science Research Laboratories, Kao Corporation

• Sakai Takaya

  Material Science Research Laboratories, Kao Corporation

• Kaneko Youhei

  Material Science Research Laboratories, Kao Corporation

• Toyo Takamasa

  Safety Res. Laboratories Kao Corp.

• Yamane Masayuki

  Safety Research Laboratories, KAO Corporation

関連論文

• Biodegradation of Dodecyltrimethylammonium Bromide by Pseudomonas fluorescens F7 and F2 Isolated from Activated Sludge
• Aquatic Toxicity and Biodegradability of Advanced Cationic Surfactant APA-22 Compatible with the Aquatic Environment
• The Excellent Water-Solubility of N-[3-(dimethyl-amino)propyl] docosanamide Chloride : The Most Eco-friendly Cationic Hair Conditioning Agent
• A tiered approach combining the short time exposure (STE) test and the bovine corneal opacity and permeability (BCOP) assay for predicting eye irritation potential of chemicals
• Species differences in toxicokinetic parameters of glycidol after a single dose of glycidol or glycidol linoleate in rats and monkeys

スポンサーリンク