A kind of preparation method of fluorine rubber raw rubber
A technology of fluororubber raw rubber and compound dispersant, which is applied in the field of fluororubber synthesis, can solve the problems of complicated process, low density of fluororubber raw rubber, heat resistance and poor liquid resistance of vulcanized rubber, and achieves simple process and product performance. Good, solvent-resistant performance
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Embodiment 1
[0034] (1) In a steel kettle equipped with a stirrer, at a speed of 15000r / min, 900g C 8 f 15 NaO 2 and 180gCH 3 O(C 2 h 4 O) 3 H stirs 0.1h, obtains composite dispersant microemulsion, for subsequent use;
[0035] (2) In a 50L stainless steel horizontal reactor, add 25kg of high-purity water, remove nitrogen and oxygen until the oxygen content is less than or equal to 10ppm, add the composite dispersant microemulsion obtained in 60g step (1), 30g disodium hydrogen phosphate, 30g4-iodine -3,3,4,4-tetrafluorobutene, stirred at 40rpm for 10min;
[0036] (3) Heat the reactor to 70°C at a stirring speed of 40rpm, add a mixed monomer of vinylidene fluoride, tetrafluoroethylene and perfluoropropylene with a molar ratio of 30:50:20 until the pressure of the reactor is 3.0MPa, and pass nitrogen Add 20g of ammonium persulfate into the reaction kettle to start the polymerization reaction. During the reaction, the compressor is continuously used to add the mixed monomer of vinylid...
Embodiment 2
[0039] (1) In a steel kettle equipped with a stirrer, at a speed of 17000r / min, mix 800g C 8 h 4 f 15 NO 2 and 200gCH 3 OCH 2 CH 2 OH was stirred for 0.3h to obtain a composite dispersant microemulsion for subsequent use;
[0040] (2) In a 50L stainless steel horizontal reactor, add 25kg of high-purity water, remove nitrogen and oxygen until the oxygen content is less than or equal to 10ppm, add 65g of the composite dispersant microemulsion obtained in step (1), 30g of disodium hydrogen phosphate, and 32g of difluoro Vinyl bromide, stirred at 50rpm for 20min;
[0041] (3) Heat the reactor to 80°C at a stirring speed of 50rpm, add a mixed monomer of vinylidene fluoride, tetrafluoroethylene and perfluoropropylene with a molar ratio of 45:30:25 until the pressure of the reactor is 1.5MPa, and pass nitrogen Add 20g of ammonium persulfate into the reaction kettle to start the polymerization reaction. During the reaction, the compressor is continuously used to add the mixed m...
Embodiment 3
[0044] (1) In a steel kettle equipped with a stirrer, at a speed of 10000r / min, 700g C 8 f 15 NaO 2 and 280gCH 3 O(C 2 h 4 O) 3 H stirs 0.5h, obtains composite dispersant microemulsion, for subsequent use;
[0045] (2) In the 50L stainless steel horizontal reactor, add 27kg of high-purity water, remove nitrogen and deoxygenate until oxygen content is less than or equal to 10ppm, add the composite dispersant microemulsion that 72g step (1) obtains, 40g disodium hydrogen phosphate, 40g 4- Bromo-3,3,4,4-tetrafluorobutene, stirred at 60rpm for 5min;
[0046] (3) Heat the reactor to 90°C at a stirring speed of 60rpm, add a mixed monomer of vinylidene fluoride, tetrafluoroethylene and perfluoropropylene with a molar ratio of 36:47:17 until the pressure of the reactor is 1.5MPa, and pass nitrogen Add 50g of ammonium persulfate into the reaction kettle to start the polymerization reaction. During the reaction, the compressor is continuously used to add the mixed monomer of viny...
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