Characteristics and functions of common rubber accelerators

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Release time:

Sep 05,2020

Adding accelerator to rubber can promote the reaction between rubber and vulcanizing agent, improve the vulcanization speed, reduce the vulcanization temperature, shorten the vulcanization time, reduce the amount of vulcanizing agent, and improve the physical and mechanical properties of vulcanized rubber.

A, different rubber with different vulcanization system, different accelerator type.

B. Accelerant plays a decisive role in the scorch performance, and the correct selection of accelerant is helpful to the mixing, rolling, extrusion and operation safety of the rubber compound. Generally, molding vulcanization requires a certain scorch time, while no mold sulfur does not require a long scorch time.

C. The scorch resistance of the accelerator is related to its critical temperature. The accelerator is activated rapidly beyond the critical temperature. When a variety of accelerators are used together, some accelerators will be inhibited, and some accelerators will have greater activity at the critical temperature.

D, the combination of accelerator should make the rubber material have a wide vulcanization flatness.

Rubber is a poor conductor of heat, and the internal heating of the rubber surface is not the same. Broad vulcanization flatness is the guarantee to avoid excessive sulfur and make all parts of the product vulcanized evenly.

E, the reasonable collocation of accelerator can also improve the aging performance of vulcanized rubber, there is a certain plastic solution, can improve the processing performance of rubber. Disadvantages, poor dispersion of the accelerator, pollution, the current use of the accelerator is generally not toxic.