Improved preparation method of epoxy trans isoprene rubber

Abstract

The invention provides an improved preparation method of epoxy trans isoprene rubber, and relates to the field of polymer materials. A first preparation method comprises the following steps: dissolving trans isoprene rubber in a solvent, slowly adding an organic acid and hydrogen peroxide under a stirring and / or ultrasonic action, reacting at a temperature of 0-80 DEG C for 0.1-12 hours, adding sodium carbonate to regulate the pH of the system to 7 after the reaction, removing a sweller and water by use of a vaporizing extract process, repeatedly eluting, pelleting and drying, and epoxy trans isoprene rubber with epoxy groups uniformly distributed in a polymer is obtained by the preparation method; a second preparation method comprises the following steps: partially dissolving the trans isoprene rubber in the sweller, wherein the rest steps are the same as those in the first method; a third preparation method comprises the following steps: prefabricating the trans isoprene rubber to emulsion, wherein the rest steps are the same as those in the first method. The epoxy groups are introduced to increase the wet skid resistance and air tightness of the trans isoprene rubber and the binding power of polar compounds, and the epoxy trans isoprene rubber can be applied on such occasions as a conveyor belt, a tire and a damping material.

Description

technical field [0001] The invention belongs to the field of polydiene rubber materials, and particularly relates to an improved preparation method of epoxidized trans isoprene rubber. The epoxidized trans isoprene rubber prepared by the method has more uniform distribution of epoxy groups and has It is beneficial to improve the adhesion, wet skid resistance and air tightness between non-polar trans-isoprene rubber and polar substances, and can be used in conveyor belts, rubber for tires and shock-absorbing materials. Background technique [0002] Trans-isoprene rubber is a natural or synthetic rubber whose structural unit is trans-1,4-isoprene. Trans isoprene rubber has excellent wear resistance, dynamic fatigue resistance, high modulus stress and partial crystallization, and can be used in rubber tires, rubber shoes, medical splints, shape memory materials, conveyor belts, shock absorbers, etc. It is used in occasions where high fatigue performance is required. However, ...

AI Technical Summary

Problems solved by technology

Although this aqueous phase suspension method overcomes the shortcoming of above-mentioned latex method and solution method epoxidation modification, as the recovery and aftertreatment process that adds organic solvent to bring is complicated, but because aqueous phase suspension method and powdery trans-1, The characteristics of 4-polyisoprene, the distribution of epoxy groups in the prepared epoxidized trans-1,4-polyisoprene is uneven, often forming a layer on the surface of the powdered polymer Epoxy compounds with extremely high epoxidation degree and dense structure make the continuous epoxidation reaction relatively difficult. At the same time, the uneven distribution of epoxy groups will also lead to inhomogeneous and uneven performance during processing and use. Stablize