| 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 -C2H4OH or formula II). USE:An ampholytic surfactant, having the 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 an epihalohydrin to give a compound of formula III (X is halogen), which is then reacted with diethanolamine and an alkali to produce a tertiary amine compound of formula IV. The resultant compound of formula IV is then reacted with a monohalogenoacetate at 50-100 deg.C to afford the aimed compound of formula I . |
