Fluorine-containing polyfunctional group epoxy resin, and preparation method and application of fluorine-containing polyfunctional group epoxy resin
A group of epoxy resin, epoxy resin technology, applied in the field of fluorine-containing multi-functional epoxy resin, can solve the problems of poor alkali resistance and acid gas corrosion performance, low curing strength, poor plugging performance, etc., to achieve alkali resistance And the effect of strong acid gas corrosion resistance, strong water resistance, and compact molecular structure
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Embodiment 1
[0026] Add 0.6mol epichlorohydrin, 0.05mol ethylene glycol and 0.1mol water into a reaction kettle equipped with a stirrer, reflux condenser and thermometer, start stirring, heat to 75°C with a water bath, and add 0.1mol of 4,4'-diaminooctafluorobiphenyl particles, react for 5 hours; when the viscosity of the product increases, add 0.5 mol of acetone, continue the reaction for 6 hours, and slowly add 0.1 mol of sodium hydroxide solution several times after the product is cooled to 55°C, ring After 1 hour of cyclization, add 0.5 mol of toluene and stir for 30 minutes, static layering, take the upper resin phase and desolventize under reduced pressure to obtain a fluorine-containing multifunctional epoxy resin. The reaction equation is as follows:
[0027]
Embodiment 2
[0029] Accurately weigh 70 parts of fluorine-containing multifunctional epoxy resin, 20 parts of 4,4'-diaminodiphenylmethane and 10 parts of dimethylformamide according to the mass parts in a reactor with agitator, and Stir and mix evenly, gradually cross-linking polymerization occurs, and after the reaction is completed, the annulus plugging agent for high-sulfur gas wells is obtained.
Embodiment 3～10
[0031] The preparation of the high-sulfur gas well annulus plugging agent is the same as in Example 2, and the specific composition ratio is shown in Table 1 below.
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