Continuous synthesis device of polyurethane elastomer prepolymer

Abstract

The invention discloses a continuous synthesis device of a polyurethane elastomer prepolymer, which comprises a reaction kettle, wherein mounting holes are formed at the left end and the right end ofthe middle of the outer side face of the reaction kettle; a first sealing bearing and a second sealing bearing are fixed in the two mounting holes respectively; an inner ring of the first sealing bearing is fixedly connected with the left end of the side face of a rotating shaft; an inner ring of the second sealing bearing is fixedly connected with the right end of the side face of the rotating shaft; and heat conduction rotating blades are mounted on the front side and the rear side of the side face of the rotating shaft in a staggered manner. The continuous synthesis device of the polyurethane elastomer prepolymer has a good refrigeration effect, is uniform in refrigeration, removes much reaction heat, and ensures the quality of the prepolymer; a single addition level of diisocyanate isaccurate; at the beginning, an annular rubber ring is connected with a rubber stopper in a clamping manner; a worker separates the rubber stopper from the annular rubber ring and inserts a thermometerinto the annular rubber ring; gas in the reaction kettle is not exhausted from the annular rubber ring; and the safety of the worker is ensured.

Description

Technical field [0001] The invention relates to the technical field of polyurethane elastomer prepolymer synthesis, in particular to a continuous synthesis device for polyurethane elastomer prepolymer. Background technique [0002] The dehydrated polyol can undergo nucleophilic addition reaction with excess diisocyanate to produce prepolymer. Under normal circumstances, although the reaction of diisocyanate and polyol is exothermic, the initial reaction is slow and requires heating. The system provides certain starting energy. When the reaction is proceeding in a large amount, the reaction is fierce and the exotherm increases. At this time, the equipment must be required to remove a large amount of reaction heat in time to avoid unnecessary side reactions. The existing equipment cannot meet the needs of uniform refrigeration; dehydrated polyol During the reaction with diisocyanate, it is necessary to continuously add diisocyanate in small doses to ensure the progress of the reac...

AI Technical Summary

Problems solved by technology

When the reaction is carried out in a large amount, the reaction is intense and the heat release is intensified. At this time, the equipment is required to remove a large amount of reaction heat in time to avoid unnecessary side reactions. The existing equipment cannot meet the needs of uniform refrigeration; the polyol after dehydration During the reaction with diisocyanate, it is necessary to continuously add diisocyanate in small doses to ensure the progress of the reaction. The accuracy of the existing equipment for adding diisocyanate is poor; the volatilization of diisocyanate is irritating to a certain extent and endangers the safety of workers.

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