Abstract: Related are a high-molecular weight allyl alcohol polyoxyethylene polyoxypropylene ether and a preparation method. During preparation, an allyl alcohol raw material and a supported catalyst Rb-NHPA are firstly added into a high-pressure reaction kettle, and it is heated after being replaced with a nitrogen gas; then after the internal temperature of the reaction kettle is raised to a reaction temperature, an ethylene oxide (EO) and propylene oxide (PO) mixture is continuously fed for a reaction; and finally, after the internal temperature of the reaction kettle is reduced, an acetic acid is dropwise added into the reaction kettle so that the crude product of the high-molecular weight allyl alcohol polyoxyethylene polyoxypropylene ether is neutralized to be neutral. The refining process of a polyether is omitted, the process flow is greatly simplified, and the process time is effectively saved. In addition, the supported catalyst Rb-NHP may be recycled.

Abstract: Related are a high-molecular weight allyl alcohol polyoxyethylene polyoxypropylene ether and a preparation method. During preparation, an allyl alcohol raw material and a supported catalyst Rb-NHPA are firstly added into a high-pressure reaction kettle, and it is heated after being replaced with a nitrogen gas; then after the internal temperature of the reaction kettle is raised to a reaction temperature, an ethylene oxide (EO) and propylene oxide (PO) mixture is continuously fed for a reaction; and finally, after the internal temperature of the reaction kettle is reduced, an acetic acid is dropwise added into the reaction kettle so that the crude product of the high-molecular weight allyl alcohol polyoxyethylene polyoxypropylene ether is neutralized to be neutral. The refining process of a polyether is omitted, the process flow is greatly simplified, and the process time is effectively saved. In addition, the supported catalyst Rb-NHP may be recycled.

Abstract: The present disclosure discloses a synthesis method of polyether for a low-modulus sealant, belonging to the technical field of organic compound synthesis. In the synthesis method of the present disclosure, a reaction is performed by using a mixture of monohydric alcohol polyoxypropylene ether and polyhydric alcohol polyoxypropylene ether as a starter, using epoxypropane as a chain extender and adding a metal complex catalyst, so as to obtain the polyether for the low-modulus sealant after the reaction is ended. The polyether prepared in the present disclosure can not only well enhance the rigid strength of the sealant but also reduce the elasticity modulus of the sealant, overcoming the problem that the existing polyether silane modified sealant is high in modulus. The synthesis method of the present disclosure is simple in synthesis process, easy to produce and control, short in production period and low in energy consumption.