FIELD: chemistry.
SUBSTANCE: invention relates to synthesis of highly stable, chemical-resistant perfluoropolyesters based on tetrafluoroethylene which are used as a base for low-temperature oil lubricants for space-rocket equipment. The invention describes a method of producing polytetrafluoroethylene oxide through photooxidation of tetrafluoroethylene with oxygen under UV radiation in the presence of a solvent and subsequent solvent distillation. The method is distinguished by that the process is carried out at temperature between minus 40°C and minus 60°C. The solvent used is perfluorotriethylamine. After solvent distillation, the product undergoes thermal treatment at 300-350°C and stabilisation with fluorine at 180-260°C.
EFFECT: design of an efficient method of producing highly stable chemical-resistant perfluoropolyesters based on tetrafluoroethylene.
1 cl, 2 ex, 2 tbl
| Title | Year | Author | Number |
|---|---|---|---|
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