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[Chemical Knowledge]：What are the upstream raw materials of SBR? What do the downstream products contain?

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Styrene-butadiene rubber (SBR) is a commonly used synthetic rubber, which is widely used in the production of tires, footwear, pipes, tapes and other chemical products. Its upstream and downstream related products mainly include raw materials, blended modified materials, processing aids and end products.

1. upstream associated products

1. Butadiene: one of the main raw materials of styrene-butadiene rubber, usually produced by naphtha cracking or ethylene oxidation.
2. Styrene: Another primary raw material, produced primarily by the reaction of ethylene and benzene.
3. Emulsifier: used in the preparation of emulsion styrene-butadiene rubber to promote the stability and polymerization of latex.
4. Initiators: Peroxides or azo compounds are usually used to initiate the polymerization of monomers.

2. Downstream Related Products

1. Tire: Styrene butadiene rubber is the most used in the tire industry and can be used to manufacture tire treads, sidewalls and inner tubes.
2. Footwear: SBR can be used to make soles, uppers and insoles, with good wear resistance and flex resistance.
3. Hose tape: SBR can be used to make all kinds of hoses, tapes, etc., with good oil resistance, acid and alkali resistance and aging resistance.
4. plastic modification: styrene butadiene rubber can be used as a plastic modifier to improve the toughness, impact resistance and processing performance of plastics.

3. Blending Modified Materials

Styrene-butadiene rubber is often blended with other polymers to improve its performance or reduce costs. Common blending materials include:

1. natural rubber: blending with styrene butadiene rubber can improve wear resistance, crack resistance and processing performance.
2. butadiene rubber: blending with styrene butadiene rubber can improve wet skid resistance and low temperature flexibility.
3. Neoprene: Blending with styrene-butadiene rubber can improve oil resistance, acid and alkali resistance and heat resistance.
4. ethylene propylene rubber: blending with styrene butadiene rubber can improve ozone resistance and heat aging resistance.

4. processing aids

In the process of styrene butadiene rubber processing, it is often necessary to add some processing aids to improve the process performance of the rubber and improve the physical properties of the product. Common processing aids include:

1. vulcanizing agent: used to promote the vulcanization reaction of styrene butadiene rubber, improve the crosslinking density and physical and mechanical properties.
2. Accelerator: Use in conjunction with vulcanizing agent to adjust the vulcanization speed and improve the performance of vulcanized rubber.
3. antioxidant: used to prevent styrene butadiene rubber aging, prolong the service life of products.
4. Plasticizer: used to reduce the hardness of styrene butadiene rubber, improve its flexibility and processing performance.

In short, styrene-butadiene rubber has a wide range of upstream and downstream related products in the field of chemical production raw materials, which plays an important role in improving product performance and reducing costs.

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