Production status of various products of rubber additives

Sulfur is a widely used vulcanizing agent for rubber. In most cases, sulfur is added in the z after mixing process. Common sulfur powder belongs to inflammable and explosive dangerous chemicals, its transportation and application have a lot of inconvenience, and it is difficult to meet the requirements of dispersion speed and dispersion uniformity in rubber mixing process; Although insoluble sulfur powder does not belong to inflammable and explosive dangerous chemicals, and because of its solubility in rubber to reduce the phenomenon of spray, but insoluble sulfur powder after all belongs to inorganic powder materials, and oilophilic rubber matrix compatibility is poor, resulting in mixing powder mixing speed, dispersion speed and dispersion uniformity is not ideal, Therefore, sulfur masterbatch is a potential variety of rubber auxiliaries masterbatch.

Zinc oxide is widely used in rubber industry as a vulcanizing active agent. Zinc oxide, as a kind of ultrafine inorganic polar powder, is more difficult to disperse quickly and evenly in the oilophilic rubber matrix than sulfur, and its dosage is usually 3 ~ 5, so the pre-dispersed zinc oxide masterbatch is also one of the potential raw materials for the rubber industry.

Rubber accelerators are mostly small molecules of organic matter, relative to sulfur and zinc oxide, and the matrix rubber compatibility is better, but because of its small amount and its dispersion uniformity in rubber has a great impact on product performance, and in most cases the accelerator is in the late mixing machine and sulfur together, so the preparation of pre-dispersed accelerator master batch is also very meaningful, In particular, the masterbatch products such as TBBS, CBS and DM, which are commonly used in tire industry, have a broad application prospect.

Relative to sulfide system in sulfur, zinc oxide, rubber accelerator, etc., the application of antioxidant master is not so urgent, this is because the current mainstream varieties of antioxidant IPPD, 6PPD, RD and other products are easy to mix and evenly dispersed in the matrix rubber, and the antioxidant can be added in the early mixing, so as to ensure sufficient dispersion time. Of course, for high quality rubber products, pre-dispersed antioxidant masterbatch is still necessary. At present, in order to reduce dust pollution and improve metering efficiency and accuracy, the manufacturers of various additives have adopted the technology of powder granulation into rod small particles. This dosage form of products is bound to be welcomed by rubber products enterprises.

Suitable for the production of rubber auxiliaries masterbatch of the complex is mainly a small amount of vulcanization system of the complex which has a greater impact on the performance of rubber products. Of course, for the antioxidant and some special function auxiliaries, if the dispersion uniformity of these auxiliaries in the matrix rubber is very important to the product performance, the preparation of auxiliaries masterbatch is very necessary. At present, domestic manufacturers of pre-dispersed rubber additives spring up like bamboo shoots, among which Ningbo Tiohua, Zhuhai Kemao and other companies gradually have a scale of production, more complete varieties, production time experience and quality control is better.