Rubber accelerator tetrabutylthiuram disulfide (TBTD) predispersed master batch and preparation method thereof

Abstract

The invention discloses a rubber accelerator tetrabutylthiuram disulfide (TBTD) predispersed master batch which can effectively solve the problem of slow compounding caused by the polarity difference between the liquid TBTD and rubber during direct compounding. The master batch has favorable flow properties in rubber after proportioning, and thus, can be added at a higher charging rate. The master batch has high compatibility, can be tightly combined with rubber in time even under the condition of different polarity from the rubber, and can maintain favorable dispersity under the action of different shearing forces. Besides, the master batch can further enhance the dispersity and flowability of the rubber effective components, improve the compatibility with the rubber, lower the addition amounts of other aids, enhance the rubber production efficiency, reduce the dust pollution and improve the working environment of the workers, and has the function of lowering the rejection ratio of the rubber product. The master batch prepared by the method can effectively maintain the original activity of the TBTD, can not cake at room temperature, is convenient for weighing, and provides great convenience for the subsequent rubber proportioning and compounding.

Description

technical field [0001] The invention relates to the technical field of rubber additives and their preparation, in particular to a rubber accelerator tetrabutylthiuram disulfide pre-dispersed masterbatch and a preparation method thereof. Background technique [0002] Rubber accelerator Tetrabutylthiuram disulfide (TBTD) is a thiuram-type accelerator. It is a dark brown oily liquid at room temperature. It is soluble in most organic solvents but insoluble in water. TBTD can be used as a rubber vulcanization accelerator or as a vulcanizing agent with an effective sulfur content of 7.5%. TBTD does not bloom or pollute in the rubber compound, and can be used to manufacture inner tubes, rubber shoes, tapes, industrial products, etc. [0003] The additives required for rubber mixing can be divided into solid and liquid. In terms of form, TBTD is a liquid additive. When the liquid additive is put into the internal mixer and the rubber is mixed, the mixing is slow due to the polari...

AI Technical Summary

Problems solved by technology

When the liquid additive is put into the internal mixer and the rubber is mixed, the mixing is slow due to the polarity difference between it and some rubbers, and the mixing in the internal mixer requires relatively low shear It is carried out under the action of force, and because the liquid additives are mixed into the rubber, the dispersion is slow and the fluidity is poor, resulting in a long rubber mixing cycle and low efficiency.