Synthetic method of polyether polyatomic alcohol

Abstract

The invention discloses a synthetic method of a polyether glycol which belongs to the manufacture technical field of chemical products. The synthetic method of the invention comprises the following steps: sucrose, a compound partly containing active hydrogen, and propylene oxide are taken as raw materials and the polyether glycol is prepared under the effect of a catalyst by the processes of ring opening polymerization, curing, neutralized degasification and dehydrating, etc.; and the synthetic method of the invention is characterized in that: the raw materials also comprise seed oil, and the inventory rating of each component is as follows according to weight percent: 20-25 percent of the sucrose, 2-15 percent of the compound partly containing the active hydrogen, 45-60 percent of the propylene oxide and 5-25 percent of the seed oil, and the total sum of the weight percent of each component is 100 percent; the seed oil can be any one or a mixture of more than one of castor oil, palm oil, soybean oil, cotton seed oil, peanut oil, coconut oil, linseed oil, rapeseed oil, corn, olive oil and sunflower oil, etc. The synthetic method of the invention reasonably chooses the seed oil as raw materials, thus being capable of effectively reducing the usage of the propylene oxide, improving the service performance of the products and reducing the production cost.

Description

technical field [0001] The invention relates to a synthesis method of polyether polyol, which belongs to the technical field of chemical product manufacture. Background technique [0002] Polyether polyol is the main raw material for the manufacture of rigid polyurethane foam. Its products have the characteristics of low thermal conductivity and high specific strength. They are widely used in the insulation of buildings, equipment, and pipelines. Ideal insulation material for electric water heaters and solar water heaters. [0003] The existing sucrose-type rigid foam polyether polyol synthesis method mainly uses sucrose, some active hydrogen-containing compounds, and propylene oxide (PO) as raw materials, and undergoes ring-opening polymerization, neutralization and decolorization, and post-filtration treatment under the action of a catalyst. Process made. Although the functionality is high, the combined polyether formulated with CFC-11 blowing agent has been widely used ...

AI Technical Summary

Problems solved by technology

However, the compatibility between this polyether polyol and cyclopentane blowing agent is poor, and the combined polyether is prone to turbidity or even delamination, and the stability is poor

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