A process to prepare fluorinated sulfobetaine compounds of formula (I)
wherein R
f
is C
2
to C
10
fluoroalkyl optionally interrupted by one or more of O, CH
2
, CHF, or combinations thereof; R
1
is C
1
to C
10
alkylene; R
2
is C
1
to C
6
alkylene or a chemical bond; R
3
is H or CH
3
; R
4
is C
1
to C
6
alkylene containing at least one hydroxyl group; R
5
is H or CH
3
; and R
6
is H or CH
3
; comprising contacting a fluorinated sulfonamide amine of formula (II)
with an aliphatic chlorosulfonic acid or salt thereof of formula (III)
in the presence of water and at least one alkylene glycol, and optionally at least one alkyl carbonate, said fluorinated sulfobetaine having reduced free chloride content and reduced flammability without the need for additional purification steps.
[EN] PROCESS TO PRODUCE FLUORINATED BETAINES<br/>[FR] PROCÉDÉ DE PRODUCTION DE BÉTAÏNES FLUORÉES
申请人:DU PONT
公开号:WO2014014810A1
公开(公告)日:2014-01-23
A process to prepare fluorinated sulfobetaine compounds of formula (I), wherein Rf is C2 to C10 fluoroalkyl optionally interrupted by one or more of O, CH2, CHF, or combinations thereof; R1 is C1 to C10 alkylene; R2 is C1 to C6 alkylene or a chemical bond; R3 is H or CH3; R4 is C1 to C6 alkylene containing at least one hydroxyl group; R5 is H or CH3; and R6 is H or CH3; comprising contacting a fluorinated sulfonamide amine of formula (II), with an aliphatic chlorosulfonic acid or salt thereof of formula (III), in the presence of water and at least one alkylene glycol, and optionally at least one alkyl carbonate, said fluorinated sulfobetaine having reduced free chloride content and reduced flammability without the need for additional purification steps.
Gemini cationic surfactants with flexible perfluorinated-ether chains
作者:Fangqiong Du、Yong Guo、Meiwei Huang、Qingyun Chen、Hu Yang、Weidong Xie、Wei Cao、Chengying Wu、Mengying Wang
DOI:10.1016/j.jfluchem.2020.109632
日期:2020.11
surface activities. We also synthesized geminicationicsurfactants with C6F13CH2CH2- groups and their γcmc are between 15.5 to 20.1 mN/m. Good linkage design, such as -(CH2)n- (where n is odd), -CH2CH2OCH2CH2- and 1,2-phenylenebis(methylene), helps for lowering surface energy. The current research provides an approach for discovering non-bioaccumulative surfactants.