fluorosurfactants, we synthesized eight amineoxides with a fluoroether chain. Their surface properties were evaluated and compared with perfluoroalkyl and hydrocarbon analogues. The surface tensions at critical micelle concentration (γcmc) for the eight amineoxides with a fluoroether chain were at a range from 15.5 to 23.0 mN/m, and γcmc of four fluoroether amineoxides were below 17 mN/m comparable to
[EN] PRODUCTION METHOD OF FLUOROETHERCARBOXYLIC ACID FLUORIDE AND FLUOROETHERCARBOXYLIC ACID<br/>[FR] PROCÉDÉ DE PRODUCTION DE FLUORURE D'ACIDE FLUOROÉTHERCARBOXYLIQUE ET D'ACIDE FLUOROÉTHERCARBOXYLIQUE
申请人:DAIKIN IND LTD
公开号:WO2010038902A1
公开(公告)日:2010-04-08
The present invention is a production method of a fluoroethercarboxylic acid fluoride, comprising the step of selectively producing a fluoroethercarboxylic acid fluoride represented by the formula (I): CF3O(CF(CF3)CF2O)CF(CF3)COF (I) by reacting hexafluoropropylene oxide with carbonyl fluoride in a solvent at a temperature of -30 to 40 °C in the presence of a catalyst, wherein the catalyst comprises at least one species selected from the group consisting of metal fluorides, tertiary amines, tertiary diamines and tetraalkylammonium salts, and the solvent is an aprotic polar solvent.