Method for compounding epoxy-terminated allyl alcohol polyoxyethylene ethers

Abstract

The invention relates to a method for compounding epoxy-terminated allyl alcohol polyoxyethylene ethers, which belongs to the synthesis technology field of organic compounds, and uses allyl alcohol polyoxyethylene ethers and epichlorohydrin as raw materials, adds catalysts into the allyl alcohol polyoxyethylene ethers, is slowly added with epichlorohydrin drop by drop under the protection of nitrogen, filters and recycles the catalysts after finishing a reaction, distills and recycles the epichlorohydrin by reducing pressure, adds solid alkali and quaternary ammonium salt catalyst into a chlorohydrin ether intermediate, reacts for a period of time under the protection of the nitrogen, is added with a neutralizer to neutralize after being filtered to discharge salt, and then is added with an adsorbent to prepare finished products by refining. The method for compounding the epoxy-terminated allyl alcohol polyoxyethylene ethers is applied to compound the epoxy-terminated allyl alcohol polyoxyethylene ethers, effectively recycles the catalysts above 15 times, prevents strongly acidic catalysts from affecting equipment and operation environment, further achieves balance of ending ratio and color, gives high reaction activities for products simultaneously, and also guarantees quality indicators of finished products.

Description

technical field [0001] The invention relates to a method for synthesizing epoxy-terminated allyl alcohol polyoxyethylene ether, which belongs to the technical field of organic compound synthesis. Background technique [0002] The molecule of epoxy-terminated allyl alcohol polyoxyethylene ether contains two active groups, allyl and epoxy, and has good reactivity. It is mainly used in epoxy resin diluents, catalysts, crosslinking agents and Chain transfer agents, chloride stabilizers, fabric finishing agents and modified silicone oils are important intermediates for the synthesis of various surfactants and important polymerization intermediates. [0003] At present, there are two main methods of epoxy-terminated polyether: [0004] The first is a one-step method, that is, a phase transfer method: polyether and epichlorohydrin are used as raw materials, and the target product is directly generated by reacting in the presence of a phase transfer catalyst and a solid or solution...

AI Technical Summary

Problems solved by technology

The active components of the catalyst used in the reported patent, boron trifluoride and concentrated sulfuric acid, will be lost as the reaction progresses, so the catalyst cannot be recovered. These lost catalysts will cause serious corrosion to the equipment, and the cycle life of the catalyst is limited. And in the reported patent, it is mainly end-capped single molecule, and there is no end epoxy group allyl alcohol polyoxyethylene ether with long chain and large molecular weight.

Images