Flame-retardant modified natural rubber material and preparation method thereof

Abstract

The invention relates to a rubber material and a preparation method thereof, in particular to a flame-retardant modified natural rubber material and a preparation method thereof. The flame-retardant modified natural rubber material is composed of a polyphosphamine (PPA) flame retardant, natural rubber (NR), epoxidized natural rubber (ENR), stearic acid, zinc oxide, a promoter CZ, an antiager 4010, carbon black and paraffin. The preparation method includes: grafting the efficient PPA flame retardant which is self-prepared onto an ENR matrix to perform flame-retardant modification on the ENR; adding the ENR after being subjected to flame-retardant modification and various rubber processing auxiliaries into the NR through mixing; utilizing high compatibility of the ENR and the NR to realize uniform dispersion of the flame retardant in the NR matrix. The natural rubber material prepared by adopting the method has excellent flame retardancy, mechanical performance and good thermostability, and the problem of lowering in mechanical performance due to the fact that the flame retardant is added into the rubber matrix is improved substantially. The flame-retardant modified natural rubber material is suitable for tires, natural rubber plates, pipes, wires and cables and automobile rubber parts.

Description

technical field [0001] The invention relates to a rubber material and a preparation method thereof, in particular to a flame-retardant modified natural rubber material and a preparation method thereof. Background technique [0002] With the continuous advancement of science and technology, the use of natural rubber continues to expand. But natural rubber is a flammable polymer material, which greatly limits its range of applications. Therefore, improving the flame retardancy of natural rubber and its products is an urgent research problem to be solved. Adding flame retardants to rubber can effectively improve the flame retardant performance of rubber products. At present, most of the widely used flame retardants are halogen flame retardants. Pollution and other issues limit its application. With the gradual deepening of research topics by researchers, it has been found that organophosphorus nitrogen intumescent flame retardants have the advantages of high efficiency flame...

AI Technical Summary

Problems solved by technology

However, the strong polarity of the flame retardant makes it difficult to be well compatible with the natural rubber material matrix

This makes it easy for the flame retardant to migrate in the polymer matrix, and it is easy to agglomerate and disperse unevenly in the matrix, which leads to a significant decline in the flame retardant and mechanical properties of the rubber material.