Special additive for rubber vulcanization accelerator cbs granulation, preparation method and granulation method of the additive

Abstract

The invention relates to a special additive for rubber vulcanization accelerant CBS granulation. The additive comprises the following components in percentage by weight: 15-50% of polyoxyethylene ether, 5-15% of industrial white oil, 2-5% of an ethylene-vinyl acetate copolymer and the balance of water. The invention further discloses a preparation method for the additive as well as a CBS granulating method using the additive. The preparation method is simple in process; the raw materials are cheap and easily obtained; industrial preparation is easy; during granulating production, addition is convenient and the addition amount is small; granular products are good in shape, and the shaping rate reaches 95% or more; granules are low in strength, and the strength value of a single granule is uniform; the granules have good dispersing performance in rubber, so that the production and the mass of a rubber product are not influenced; the granular products can be prevented from agglomerating in the transportation and storage processes; the vulcanization accelerant CBS granular products produced by using the special additive are generally recognized and favored by customers at home and abroad.

Description

technical field [0001] The invention relates to an additive for rubber vulcanization accelerator granulation, and also relates to a preparation method of the additive and a granulation method for granulating the rubber vulcanization accelerator by using the additive, belonging to the technical field of rubber vulcanization accelerator granulation. Background technique [0002] Most of the existing vulcanization accelerator products used in rubber production are made into granular products to overcome the dust pollution of powder accelerators during packaging and transportation, as well as the poor fluidity, easy bridging, and Defects such as inability to accurately measure when using an automatic feeding system. When vulcanization accelerator is granulated, granulation additives need to be added to bond the powder into shape and facilitate granulation. At present, the commonly used granulation additives are polyvinyl alcohol single product or polyvinyl alcohol and some inorg...

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Problems solved by technology

[0002] Most of the existing vulcanization accelerator products used in rubber production are made into granular products to overcome the dust pollution of powder accelerators during packaging and transportation, as well as the poor fluidity, easy bridging, and Defects such as inability to accurately measure when using an automatic feeding system

When vulcanization accelerator is granulated, granulation additives need to be added to bond the powder into shape and facilitate granulation. At present, the commonly used granulation additives are polyvinyl alcohol single product or polyvinyl alcohol and some inorganic salts Compound products of substances, etc., this type of additive has the following defects: when the amount of addition is too high, although the granulation rate of the particles obtained by granulation is high, the strength is too high (greater than 5N), resulting in poor dispersion of the material during use; reduce the amount of addition Finally, although the average strength of the particles obtained by granulation is low, the uniformity is poor, fluctuating

The amount of polyvinyl alcohol used cannot meet the problems of disintegration and dispersibility at the same time. Those with low strength are easy to break, and those with high strength have poor dispersibility. Granular products with low strength may be damaged during long-term storage and transportation. When external force is applied, it is easy to cause collapse and agglomeration, which will affect the dispersibility during use

Therefore, when the granular vulcanization accelerator product obtained by using such additives is used in the rubber manufacturing process, because of poor dispersion performance, it is not conducive to ensuring the quality of rubber

In addition, the polyvinyl alcohol component contained in the additive will appear in the form of a film, further affecting its dispersibility, and this chemical component is incompatible with the rubber composition and is not accepted by the rubber manufacturing industry; similarly, the inorganic salt contained in it Such substances are classified as the ash content of the product, which will also affect the quality of rubber products, especially tires, and the use of them is not recommended

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