A modified zinc oxide, its preparation method and its application in rubber products

Abstract

The invention relates to a modified zinc oxide and a preparation method thereof, and application of the modified zinc oxide in rubber products. According to the invention, the preparation method simplifies the technical operation and promotes the uniform distribution of zinc oxide; the zinc oxide surface is subjected to modification treatment; tetraethyl orthosilicate is hydrolyzed in the solution to generate silicon dioxide, and the silicon dioxide is coated on the zinc oxide surface, thereby avoiding the direct contact between the latex and zinc oxide; and the modified can be added with sulfur and other materials and mixed and cured, so that the silicon dioxide outside the zinc oxide can be corroded by the alkali during high-temperature vulcanization, thereby fully displaying the vulcanization activation effect. The modified zinc oxide comprises the following components in parts by weight: 8-15 parts of water, 0.01-0.1 part of sodium hydroxide, 2-6 parts of zinc oxide and 0.5-2 parts of tetraethyl orthosilicate. The modified oxidizer is applicable to preparing rubber products. The invention avoids the pipeline blockage caused by high dead rubber tendency by adding common zinc oxide during curing, reduces the disassembly / assembly and cleaning frequency of the mixing machine head, and enhances the production efficiency.

Description

technical field [0001] The invention belongs to the field of rubber products, and in particular relates to modified zinc oxide, its preparation method and its application in rubber products. Background technique [0002] Zinc oxide is an important inorganic activator in the rubber industry. Its role is to give full play to the role of organic accelerators, reduce the amount of accelerators or shorten the vulcanization time. It forms an activation system with stearic acid, which is effective for various accelerators. Strengthen the role of promotion. In the existing Dunlop process, zinc oxide is added through an injection needle before the latex-air mixture enters the air bubble head, and it is difficult to disperse evenly in a short time, which not only causes serious zinc oxide deposition and dead glue, but also This greatly increases the disassembly and cleaning work of the foaming machine head, and can also lead to excessive pressure in the pipeline, making it difficult ...

AI Technical Summary

Problems solved by technology

In the existing Dunlop process, zinc oxide is added by a pump through an injection needle before the latex-air mixture enters the air bubble head, and it is difficult to disperse evenly in a short time, which not only causes serious zinc oxide deposition and dead glue, but also It greatly increases the disassembly and cleaning work of the foaming machine head, and it can also lead to excessive pressure in the pipeline, making it difficult to accurately control the flow rate of each ingredient pipeline, and eventually the pipeline ruptures and the material is splashed

At the same time, the process must strictly control the conditions, otherwise, in continuous production, it is easy to form gel in the pouring utensils and block them; in intermittent production, it is easy to cause gelation before the rubber is filled with the mold, reducing production efficiency

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