A method of preparing fluororubber through microemulsion polymerization
A technology of microemulsion polymerization and fluororubber, which is applied in the field of preparation of fluororubber by microemulsion polymerization, can solve problems such as application research blanks, and achieve the effects of avoiding gel, improving vulcanization, and improving production efficiency
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[0023] Example 1:
[0024] In this embodiment, fluoroether carboxylate and fluoroether oil are used as raw materials to prepare microemulsion surfactants:
[0025] Add 4kg of non-ionized water into a 10L container, 1.8kg structure is CF 3 O(CF(CF 3 )CF 2 O) 3 (CF 2 CF 2 O) 5 COONH 4 Fluoroether carboxylate, 1.0kg structural formula is CF 3 O(CF(CF 3 )CF 2 O) 12 (CF 2 CF 2 O) 2 CF 3 The fluoroether oil is stirred evenly under normal temperature and pressure to obtain an aqueous solution of microemulsion surfactant with a concentration of 41.2%.
Example Embodiment
[0026] Example 2:
[0027] Add 4kg of deionized water into a 10L container, 3.8kg of structure is CF 3 O(CF(CF 3 )CF 2 O) 8 COONH 4 Fluoroether carboxylate, 1.6kg structure formula is CF 3 O(CF(CF 3 )CF 2 O) 10 (CF 2 CF 2 O) 4 CF 3 The fluoroether oil is stirred evenly under normal temperature and pressure to obtain an aqueous solution of microemulsion surfactant with a concentration of 57.4%.
Example Embodiment
[0028] Example 3:
[0029] Take a 100L polymerization kettle as an example, add 60kg of non-ionized water and 1.2kg of the microemulsion surfactant prepared in Example 1 to the reaction kettle; after nitrogen replacement and vacuum treatment, the oxygen content in the kettle is ≤20ppm; Add the mixed monomer of vinylidene fluoride and hexafluoropropylene with a mass ratio of 60:40 to a kettle pressure of 2.1 Mpa; stir, heat up to 92°C, add a 5% potassium persulfate initiator 1.2Kg to start the reaction, and react During the process, the monomer mixture is continuously added to keep the pressure at 2.1Mpa; the reaction is stopped after a certain amount of reaction, and the unreacted mixed monomer is recovered after cooling; the polymerized latex is coagulated, washed, dried and dehydrated by the mill Get binary fluorine rubber raw rubber.
[0030] See Table 1. The fluororubber prepared in Example 3 is compared with the fluororubber prepared with perfluorooctanoic acid as an emulsifi...
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