Preparation method of white carbon black/natural rubber composite material

Abstract

The invention belongs to the technical field of natural rubber wet mixing, and relates to a preparation method of a white carbon black / natural rubber composite material. Wet mixing process is adopted,the preparation method comprises the following steps: preparing white carbon black into a uniform dispersion solution through mechanical grinding; mixing the obtained dispersion solution with naturallatex, slowly stirring to enable the natural latex to be in full contact with the white carbon black; carrying out flocculation of negatively charged natural latex with positive charges generated bya high-temperature atomization method, and coating the white carbon black in an obtained flocculate; and carrying out dehydration drying to prepare the white carbon black / natural rubber composite material. The white carbon black / natural rubber composite material and the preparation method thereof have the innovation points that: first, other rubber auxiliaries except afiller and the latex in the formula are added together, so that premixing of the materials in the formula is realized, later processing is facilitated, the mixing time is shortened, and dust pollution generated during mixing is reduced; and second, the processing mode is continuous, aprepared masterbatch is put into a continuous mixing mill, and continuous production can be realized.

Description

Technical field: [0001] The invention belongs to the technical field of natural rubber wet mixing, and relates to a continuous preparation method of white carbon black / natural rubber composite material, which has the advantages of environmental protection and low energy consumption, can shorten the production cycle, and makes white carbon black in natural rubber To achieve micro-dispersion and improve rubber properties. Background technique: [0002] Mixing is the most critical process in the processing of rubber products. The purpose is to fully mix the rubber additives in the formula with the rubber, and to disperse the rubber additives as evenly as possible. Rather than saying that the quality of the mixing result directly determines the rubber The performance and service life of the product, rather than the degree of dispersion and distribution of rubber additives in rubber determine the performance and service life of rubber products, so how to improve the dispersion of...

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Problems solved by technology

The study found that although the wet mixing process can improve the microscopic dispersion of fillers, because the flocculation and drying methods are mostly chemical means such as acid flocculation, it will affect the performance of rubber products.

The acidic flocculation method has irreversible defects, which will not only affect the health of the operators, but also corrode the equipment. The long-term drying after flocculation is likely to produce acid gas that affects the environment. If the strong acid is not cleaned, it will also affect the subsequent vulcanization time, and , in the acidic environment, the vulcanization time of the rubber compound will produce hysteresis, which will easily cause overvulcanization and affect the performance of rubber products.

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