Preparation method of zinc oxide for rubber

Abstract

The invention relates to a preparation process of zinc oxide which is used on rubber, which uses indirect zinc oxide as raw material, and prepares zinc oxide for rubber through conducting surface process, filter-pressing, drying, calcination activation and disintegration for indirect zinc oxide raw material, wherein the surface process is that conducting slurry which is prepared through mixing indirect zinc oxide with water-based auxiliary agent and surface activator with activating processing for 7-9 hours under the condition of 60-100 Celsius temperature and 0.05-0.8 MPa pressure. Zinc oxide for rubber whose specific surface area is 8-30m2 / g can be prepared through the process which is simple.

Description

A kind of preparation method of zinc oxide for rubber technical field The invention relates to a preparation method of zinc oxide for rubber. Background technique Zinc oxide for rubber mainly includes indirect zinc oxide and direct zinc oxide. In recent years, nano zinc oxide has been gradually used as a rubber additive. As a rubber additive, the specific surface area of ​​zinc oxide is very critical. If the specific surface area is too small, the dispersibility of zinc oxide will be poor, the rubber vulcanization time will be long, and the rubber produced will have poor heat resistance and short life; Large, such as nano-zinc oxide, there are problems such as sticking rolls, large dust and environmental pollution, and the rubber after vulcanization is easy to be brittle and easy to break. Zinc oxide with a specific surface area between 8m2 / g-302 / g is an ideal rubber additive. At present, in the market, the specific surface area of ​​indirect zinc oxide products produce...

AI Technical Summary

Problems solved by technology

At present, in the market, the specific surface area of ​​indirect zinc oxide products produced by indirect method is generally below 4m2 / g, while the specific surface area of ​​nano-zinc oxide is above 30m2 / g, which cannot meet the requirements of ideal rubber additives.