FIELD: chemistry.
SUBSTANCE: invention relates to chemical technology of obtaining fluorine-containing surface-active substances, which can be applied in the field of creation anti-friction compositions, varnish-and-paint materials, water repellents for wide spectrum of materials, compositions for anti-corrosion protection of metals, etc. A fluorine-containing surface-active substance based on diglycerides of perfluorocarboxylic acids, selected from a group of carboxylic acids of hexafluoropropylene oxide dimer or trimmer or their mixture is obtained by carrying out a reaction of glycerol etherification with perfluorocarboxylic acids, selected from a group of hexafluoropropylene oxide dimer or trimmer or their mixture, in the presence of a catalyst, selected from the group: sulfuric acid, orthophosphoric acid, chlorosulphonic acid or sulphonated cation-exchange resins, with a temperature of the reaction mixture being 90 - 120°C and a molar ratio of glycerol to perfluorocarboxylic acid equal to 1:(2-2.1).
EFFECT: invention ensures simplified technology of synthesis of fluorine-containing surface-active substances and reduction of byproducts.
2 cl, 7 ex
| Title | Year | Author | Number |
|---|---|---|---|
| 2,2,2-TRIS-([1′,1′,1′,2′,2′,3′,5′,6′,6′,8′-UNDECAFLUORINE-5′,8′-DI-(TRIFLUOROMETHYL)- 4′,7′-DIOXY-9′-METHYLENEOXY CARBONYL) ETHANOL, AND PROCESS FOR PREPARATION THEREOF | 1994 |
|
RU2083552C1 |
| METHOD OF SYNTHESIS OF PERFLUORINATED ETHERS WITH TERMINAL FUNCTIONAL GROUPS | 2000 |
|
RU2179548C2 |
| ANTI-ADHESION COMPOSITION | 2004 |
|
RU2286853C2 |
| METHOD OF PRODUCING PERFLUORINATED ETHERS WITH TERMINAL FUNCTIONAL GROUPS | 2012 |
|
RU2473533C1 |
| METHOD OF PREPARING POLYFLUORINATED ALKOXYPROPIONYL FLUORIDES | 2002 |
|
RU2230057C1 |
| PERFLUOROPOLYOXAALCARBOXYLIC ACID ESTER AND MONOISONONYLPHENOL POYETHYLENEGLYCOL ESTER | 1992 |
|
RU2061675C1 |
| METHOD OF PRODUCING HEAT-RESISTANT AND CRACK-RESISTANT COPOLYMERS OF TETRAFLUOROETHYLENE WITH ETHYLENE | 2008 |
|
RU2395530C2 |
| METHOD OF SYNTHESIS OF METHYL-TERT-C- C-ALKYL ESTERS | 1992 |
|
RU2048464C1 |
| 0 |
|
SU522787A3 | |
| PROCESS FOR PREPARING C-C-ALKYL TERT-C-C-ALKYL ETHERS | 1994 |
|
RU2070189C1 |
