Preparation method of inorganic filler/rubber composite material

Abstract

The invention belongs to the technical field of wet mixing, and relates to a preparation method of an inorganic filler / rubber composite material, which comprises the following steps: adding a foaming agent into a pre-dispersion of an inorganic filler and latex, and breaking a filler aggregate by using volume expansion power formed by breaking and expanding bubbles generated by the foaming agent to prepare the inorganic filler / rubber composite material. Due to the foaming uniformity, the rubber and the inorganic filler are in full contact under the liquid phase condition, the interface phase structures of the inorganic filler and the rubber are increased, the mixed emulsion is instantly solidified and dried after being deposited on the wall surface of a high-temperature roller, and the oxidation chain scission degree of the rubber and the loss of non-rubber components such as protein and phospholipid are reduced; a foaming pre-dispersion technology and a flash drying technology are combined, so that the problems that polar filler is easy to agglomerate and difficult to disperse in the mixing process, the compatibility of inorganic filler and rubber is poor, the rubber material performance is poor due to acid flocculant coagulated latex, the environment is polluted by discharged acid gas and the like are solved, and the preparation efficiency and the comprehensive performance of wet-process mixed rubber are improved; and a basis is provided for preparation of high-end rubber products.

Description

Technical field: [0001] The invention belongs to the technical field of rubber wet mixing, and in particular relates to a method for preparing an inorganic filler / rubber composite material. Background technique: [0002] In the rubber industry, carbon black is a commonly used reinforcing agent. Using carbon black to fill and reinforce composite materials can effectively improve the performance of composite materials. However, there are the following problems: carbon black uses non-renewable resources such as petroleum and natural gas as raw materials, and the energy consumption in the preparation process is large, which brings very serious dust pollution and endangers the environment and human health; and the tread of the whole carbon black reinforcement system Disadvantages of the rubber formula: high heat generation, low wet skid resistance, low tear resistance and high static electricity have made it unable to meet the needs of high-performance tires. [0003] In additio...

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Problems solved by technology

However, there are the following problems: carbon black uses non-renewable resources such as petroleum and natural gas as raw materials, and the energy consumption in the preparation process is large, which brings very serious dust pollution and endangers the environment and human health; and the tread of the whole carbon black reinforcement system Disadvantages of rubber formula: high heat generation, low wet skid resistance, low tear resistance and high static electricity have made it unable to meet the needs of high-performance tires

[0006] Based on the existing dry mixing technology, the filler and rubber additives cannot achieve an ideal dispersion state in the rubber matrix, the compatibility between the filler and the rubber is poor, the energy consumption is high, and the dust pollution is serious; the acid solidification of the wet mixing The acid residue in the process leads to deterioration of the aging resistance and fatigue resistance of the rubber compound. At the same time, the discharge of acid gas and acid waste liquid has a very serious impact on the environment and human body, which is not suitable for the requirements of sustainable development.

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