摘要:
Fluorovinylethers having the formula CFX=CXOCF 2 OR, wherein R is a C 2 -C 6 linear, branched or C 5 -C 6 cyclic (per)fluoroalkyl group, or a C 2 -C 6 linear, branched (per)fluoro oxyalkyl group containing from one to three oxygen atoms; when R is fluoroalkyl or fluorooxyalkyl group as above defined, it can contain from 1 to 2 atoms, equal or different, selected from the following: H, Cl, Br, I; X = F, H; and homopolymers or polymers obtainable polymerizing said fluorovinylethers with at least another polymerizable monomer.
摘要:
A process for the synthesis of (per)fluorinated monofunctional carbonyl compounds having the following formula:F-A-(R F ) t -B-C(O)X 1 wherein: X1 = F, CF3; t = 0, 1; A, B equal to or different from each other, are independently C1-C5 (per)fluoroalkylene groups or C1-C5 (per)fluorooxyalkylene groups; RF is -Rf1-, C1-C20 perfluoroalkylene, -ORf1O-; or -ORf2-, wherein Rf2 is a perfluorooxyalkylene chain; wherein the carbonyl groups of a (per)fluorinated di-functional carbonyl compound of formula (III):X2(O)C-A-(RF)t-B-C(O)X1 wherein: X1, RF, t, A and B have the above meanings; X2, equal to or different from X1, has the same meanings as X1; are partially fluorinated with elemental fluorine in the presence of a catalyst having formula MeFy.zHF, Me being an alkaline or alkaline-earth metal or Ag, y = 1 or 2, z an integer from 0 to 4, carrying out said reaction at a temperature higher than a temperature such that it leads to the formation of C(O)FX2.
摘要:
A process for the synthesis of (per)fluorinated monofunctional carbonyl compounds having the following formula:
F-A-(R F ) t -B-C(O)X 1 (I)
wherein:
X 1 = F, CF 3 ; t = 0, 1; A, B equal to or different from each other, are independently C 1 -C 5 (per)fluoroalkylene groups or C 1 -C 5 (per)fluorooxyalkylene groups; R F is -Rf 1 -, C 1 -C 20 perfluoroalkylene, -ORf 1 O-; or -ORf 2 -, wherein Rf 2 is a perfluorooxyalkylene chain; wherein the carbonyl groups of a (per)fluorinated di-functional carbonyl compound of formula (III):
X 2 (O)C-A-(R F ) t -B-C(O)X 1 (III)
wherein:
X 1 , R F , t, A and B have the above meanings; X 2 , equal to or different from X 1 , has the same meanings as X 1 ; are partially fluorinated with elemental fluorine in the presence of a catalyst having formula MeFy.zHF, Me being an alkaline or alkaline-earth metal or Ag, y = 1 or 2, z an integer from 0 to 4, carrying out said reaction at a temperature higher than a temperature such that it leads to the formation of C(O)FX 2 .
摘要:
A process for the synthesis of (per)fluorinated monofunctional carbonyl compounds having the following formula (I) :
F-A-R F -B-C(O)X 1 (I)
wherein:
X 1 = F, CF 3 ; A, B equal to or different from each other, are independently (per)fluoroalkylene or (per)fluorooxyalkylene groups; R F is -ORf 1 O- wherein Rf 1 = perfluoroalkylene or -ORf 2 , wherein Rf 2 is a perfluorooxyalkylene chain; said process comprising the following steps:
A) obtainment of the formula (II) mono-hypofluorite:
FO-CFX 2 -A-R F -B-C(O)X 1 (II)
by partial fluorination with elemental fluorine of the carbonyl groups of the formula (III) compound:
X 2 (O)C-A-R F -B-C(O)X 1 (III)
in the presence of a formula MeFy catalyst, Me being an alkaline or alkaline-earth metal or Ag, y = 1 or 2; B) thermal decomposition of the compound (II) to give the compounds according to the following scheme: FO-CFX 2 -A-R F -B-C(O)X 1 (II) - - - - - → F-A-R F -B-C(O)X 1 (I) + (O)CFX 2 .
摘要:
A process for preparing membranes formed by (per)fluorinated ionomeric electrolytes salified with the lithium ion, comprising the following steps:
a) obtaining of (per)fluorinated polymer membranes, containing -SO 2 F groups; b) partial or complete salification of (per)fluorinated polymer membranes containing -SO 2 F groups with basic lithium compounds and final washing with water; c) swelling and contemporaneous drying process of membranes by dipping in a heterogeneous biphasic system of a dipolar aprotic solvent wherein insoluble solid drying agents are dispersed.