Rubber is an organic polymer compound, which is divided into natural rubber and synthetic rubber according to different sources. In addition, it also has impervious to water, air, insulation and other good performance. Because rubber has these characteristics, it is widely used in industry, agriculture, transportation, national defense and People's Daily life.
In the rubber industry, in order to improve the process performance of raw rubber in processing and using the properties of the vulcanizates, must add curing agent, promoter, surfactant and stabilizer, reinforcing agent and colouring agent and other auxiliaries, make the rubber on the physical and chemical change.
Titanium pigment is a kind of very good colorant, because of its physical and chemical performance is stable, small particles, without damage to the vulcanization process of manganese, copper, cadmium, cobalt and other impurities, not damage the vulcanization process, due to its decoloring force and high covering power, use a small amount of titanium dioxide can achieve very good color effect, and tensile ability of products, elongation and bending performance have no effect.
At the same time, strong resistance to the sun, under the sunlight does not crack, do not change color, so generally in white and light-colored rubber products are not indispensable titanium white powder. Rubber products made of titanium white powder have the characteristics of slow aging, high strength, high elongation rate and not easy fading. Rutile type of domestic titanium dioxide, for example, a kind of sulfuric acid preparation of titanium dioxide, organic and inorganic single aluminum coated on the surface processing, good whiteness, high gloss, high covering power, reducing power, easy to disperse in rubber and other characteristics, it is widely used in rubber industry.
Generally, the quality of titanium dioxide for rubber has the following requirements:
1, good heat resistance, is curing at 110 ℃ to 170 ℃ and not yellow;
2. Good stability to sulfur and other additives;
3. High color dissipation and covering power;
4. There should be no adverse effect on the performance of rubber products.