| 摘要 |
NEW MATERIAL:An ampholytic surface active betaine compound of formula I (R is 8-24C alkyl or alkenyl; R' is ethylene and/or propylene; n is an integer 1-50; R1 and R2 are <=5C alkyl or alkylol). USE:An ampholytic surfactant, having surface activity within a wide pH range, and capable of exhibiting compatibility with any of anionic, nonionic and cationic type surfactants. PREPARATION:Ethylene oxide or propylene oxide or both are added to an 8- 24C higher alcohol, and the resultant addition product is then reacted with a thionyl halide to form a compound of formula II (X is halogen), which is reacted with a dialkylamine, etc. and then dehalogenated with an alkali to form a tertiary amine compound of formula III. The resultant tertiary amine of formula IIIis then reacted with a monohalogenoacetate at 50-100 deg.C to afford the aimed compound of formula I . |
