High purity low molecule biphenol A epoxy resin synthetic process
A technology for epoxy resin and low molecular weight, applied in the field of synthesizing high-purity low-molecular-weight epoxy resin, can solve the problems of complex production process, difficulty in desalination, large amount of waste water, etc., and achieve simple production process, high product purity and low viscosity. Effect
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[0008] Combine 0.1 mol of bisphenol A, 1.0 mol of epichlorohydrin and K 2 CO 3 0.2 mol was put into the reaction kettle, stirred, and the temperature was raised to 110°C. The progress of the reaction was monitored by gas chromatography for 3 hours, and the reaction was completed. The reaction was filtered and the filter cake was washed with a small amount of epichlorohydrin. The filter cake is KCl and KHCO 3 The mixture can be reused or used for other purposes after treatment. Combine the filtrate and washing liquid, distill under reduced pressure to remove excess epichlorohydrin (recyclable). When it is no longer distilled out, add 50ml of toluene and continue vacuum distillation to remove the residual epichlorohydrin. The distillation substrate is the product. The Ep340 content of the epoxy resin obtained in this way is greater than 90%, which is higher than that of the product prepared by the prior art (the Ep340 content is about 80%).
[0009] The reaction process described in...
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