Phase Behavior and Detergency of Methoxy Polyoxyethylene Dodecanoate

Methoxy Polyoxyethylene Dodecanoate의 상거동과 세정성

  • Kang, Y.S. (LG Chem., Household & Personal Care Products R&D Institute) ;
  • Yun, Y.G. (Dept. of Ind. Chemistry Chungbuk Nat'l Univ.) ;
  • Lee, J.H. (Dept. of Ind. Chemistry Chungbuk Nat'l Univ.) ;
  • Nam, K.D. (Dept. of Ind. Chemistry Chungbuk Nat'l Univ.)
  • 강윤석 ((주)LG화학 생활과학연구소) ;
  • 윤영균 (충북대학교 공과대학 공업화학과) ;
  • 이진희 (충북대학교 공과대학 공업화학과) ;
  • 남기대 (충북대학교 공과대학 공업화학과)
  • Received : 1998.01.24
  • Accepted : 1998.03.16
  • Published : 1998.06.10

Abstract

Methoxy polyoxyethylene dodecanoates are a kind of nonionic surfactants obtainable from reaction of fatty acid methyl ester with ethylene oxide utilizing a solid catalyst. Methoxy polyoxyethylene dodecanoates have economical advantage compared with polyoxyethylene dodecyl ethers using fatty alcohol. In this work, the solubilizing capacity concerned with phase behavior of ternary systems composed of nonionic surfactant/water/oil, interfacial tension and detergency at the phase inversion temperature(PIT) were investigated and compared with those of polyoxyethylene dodecyl ethers in order to confirm the applicability of methoxy polyoxyethylene dodecanoates in the detergents. Methoxy polyoxyethylene dodecanoates showed the solubilizing capacity of 10~18% for hexadecane which were about 6% higher than polyoxyethylene dodecyl ethers. At the PIT condition, methoxy polyoxyethylene dodecanoates' interfacial tension were 0.0124~0.0176 dyne/cm while polyoxyethylene dodecyl ethers have the value of 0.013~0.0163 dyne/cm and methoxy polyoxyethylene dodecanoates showed higher detergency of 82.1~83.2% than polyoxyethylene dodecyl ethers of 76.5~77.3%. The good detergency performance of methoxy polyoxyethylene dodecanoates would be due to the higher oil solubilizing power and lower interfacial tension than polyoxyethylene dodecyl ethers at the PIT condition.

Keywords

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