Styrene-Butadiene Rubber, SBR
Styrene butadiene rubber, SBR is the outcome of synthetic rubber research in 1929, a German chemist developed a series of synthetic elastomers by copolymerization of two compounds (styrene and butadiene) in the presence of a catalyst. The process is to let styrene and butadiene react together. The new synthetic rubber that was formed consists of about 25% styrene, with butadiene making up the rest, which in principle had the same properties as natural rubber. These rubber, Styrene butadiene rubber, SBR is considered to be the highest volume general purpose and the most common type of synthetic rubber.
What is Styrene butadiene rubber, SBR?
Styrene butadiene rubber, SBR is one of the cheaper synthetic general purpose elastomers that is sometimes used as a substitute for natural rubber (NR). It can be produced by free-radical solution polymerization or by emulsion polymerization either warm at 30 to 60°C (hot rubber) or cold at temperatures near 0°C (cold rubber).SBR is a polymer.
Application for Styrene-Butadiene Rubber
You can use Styrene-Butadiene Rubber, SBR in car tires, conveyor belts, footwear, cables, hosepipes and various technical rubber articles, tire sidewall, floor coverings, bicycle tires, footwear, children toys, cables, rubber pipes and various rubber articles having light color shades. Sponge, industrial goods, rubberized fabric, and toys. Black products requiring good process ability mechanical good compounds where color and staining are not decisive factors.
Properties of Styrene Butadiene Rubber, SBR
Styrene-Butadiene Rubber, SBR is usually very weak unless reinforcing fillers are incorporated. With suitable fillers, this becomes a strong rubber.Styrene-Butadiene Rubber, SBR has similar chemical and physical properties like natural rubber.
SBR has better abrasion resistance.
Styrene Butadiene Rubber has poorer fatigue resistance.
Heat resistance of Styrene-Butadiene Rubber, SBR is better than natural rubber.
Low temperature flexibility and tensile strength of Styrene-Butadiene Rubber, SBR are less than that of natural rubber.
Information on basic physical and chemical properties
Appearance: Milky white liquid with light blue gloss
Odor: Weak, Slight odor
Solvent SBR: Dimethylformamide DMF or (Dimethylformamide)
Density SBR: 0.92_0.95 g / cm3 (Depending on styrene percentage)
Melting Temperature (Tm) SBR: It does not melt in the cooked state.
Glass transition temperature: varies from -52 to -13 ° C (Depending on the percentage of styrene)
Hardness grade: 50 to 90
Polar or non-polar state: Non-polar
Relative density 0.940 g/cm3
Water solubility Water soluble
Flammability (solid, gas): Ordinary combustibles
SBR has excellent corrosion resistance and with increasing cis and vinyl butadiene content, corrosion resistance continues to increase, wear resistance, good resilience, low resilience, cracking resistance, heat resistance and resistance hit a shot.
Difference between SBR and PBR
Polybutadiene Rubber, PBR the second largest volume elastomer, accounts for approximately 25 percent of the total global consumption of synthetic rubbers. Due to its very low vinyl content it has a very low glass transition temperature (-90 °C), very high resilience and is probably the most elastic rubber. Polybutadiene Rubber,
PBR also has good abrasion and tear resistance as well as low heat buildup, which is important for tire applications. Compared to SBR, it has a lower glass transition temperature, which gives it a lower rolling resistance. However, it has lower friction on wet surfaces than SBRs. For this reason, it is usually blended with SBRs and natural rubbers to achieve the best tire
The Polybutadiene Rubber, PBR is and will continue to be a high volume rubber for use in toughened plastics, tires, and golf balls due to its low cost, availability and unique properties.
5 important reason that SBR use in the rubber industry are
1- Rupture resistance
2- Fatigue strength
3. Flex resistance
4. Abrasion resistance
5. Resistance to slipping (has the property of grappling with asphalt)
Disadvantages and advantage SBR
Disadvantage: Low resistance to ozone, low resistance to flame very difficult process ability, low resistance to oil and petrol, low resistance to hydrocarbon solvents.
Low resistance to ozone Low resistance to flame and ignition, very difficult process ability, low resistance to gasoline and low resistance oil to hydrocarbon solvents
Flammability properties SBR.
SBR burns in the flame and continues to burn after the flame has been removed.
The yellow flame is orange and sounds a little.
A white smoke to grayish with carbon particles.
SBR does not drip in the flame.
SBR provides urban gas odor.
Advantage: Suitable prices, water resistant, acid resistant and alcohol resistant.
SBR used in the production of tire and rubber, SBR increases shelf life the tire. SBR, which is mixed with suitable additives, has good anti-wear properties. The ratio of styrene and butadiene affects the polymer's properties, so if the amount of styrene is high, rubber is harder. Very cheap, water resistance, acid and alcohol resistance.
SBR (Styrene Butadiene Rubber)
We have styrene butadiene rubber (SBR), SBR is a collection of synthetic rubbers from styrene and butadiene. These materials SBR have resistance to abrasion when mixed with suitable additives. The mixed styrene and butadiene ratio affects the polymer's properties, so if the amount of styrene is high, rubber is hard. Styrene-butadiene is produced by cold emulsion copolymerization. Actually to properties such as high process ability, high scrubbing resistance and also the environmental properties of the most widely used synthetic elastomer. Other name for SBR is Ameripol Synpol, Europrene, kralex, polysar, and plioflex, Copo Carbomix, Nipol, and Solprene, cold emulsion styrene butadiene.
SBR without oil
SBR with oil
For the rubber industry, especially in the automotive industry, such as tire. This accounts for about 70 percent of global demand for products. Other markets of SBR, with the exception of tires, cover about 25-30% of artificial rubber request, including mechanical parts and a range of other end products, Elastomer, Thermoplastic Elastomer TPE.
Styrene Butadiene has different grades and varies depending on each grade, ranging from tire and rubber to shoe and mechanical industries. The most important use of this product is the production of tires and rubber parts.
One of the most important uses of SBR is its use in tire manufacturing, especially the part of the tire that comes in contact with the ground and the five important SBRs for this major use in the rubber industry are: Rupture resistance, fatigue strength, flex resistance, abrasion resistance, slip resistance (has the property of grappling with asphalt).
SBR with oil is used for Car tire, conveyor belt, shoes foam, cable and other rubber items.
SBR without oil is used for Car tire, conveyor belt, shoes foam, cable, flooring, bike tire, toy, foam rubber, Industrial rubber articles, Rubber linings and other rubber items.
Storage of Styrene Butadiene Rubber, SBR
Keep SBR container tightly closed in a dry and well-ventilated place. Avoid extreme temperatures. The rubber must be kept in premises at temperature max 40C.
Styrene Butadiene Rubber must be stored in a cool place in original container and protect from sunlight.
The Styrene Butadiene Rubber, SBR is packed in wooden or metal containers and stored in piles containing 3-4 palettes.
The Styrene Butadiene Rubber packed in paper bags is stored in piles no more than 1, 2 meter high.
Guaranteed storage time – 1 year.
Avoid near UV – emitting lights such as the incandescent lamps and mercury lamps.
Avoid aromatic solvents, chlorine derivatives.
Avoid open fire.
Precautions for safe handling for work with Styrene Butadiene Rubber, SBR
Provided good ventilation and/or local exhaust systems are used in this location.
Avoid prolonged or repeated contact Styrene Butadiene Rubber, SBR with skin. Use good personal hygiene.
Do not or store food in the work area.
Wash hands before smoking or eating.
Take precautionary measures against static discharges.
Electrically bond and ground all containers and equipment before transfer or use of material the Styrene Butadiene Rubber, SBR.
Styrene Butadiene rubber, SBR in ShinaDT
Styrene Butadiene rubber, SBR, is a synthetic rubber which is often substituted in part for natural rubber based on the comparative raw materials cost. Our Styrene Butadiene Rubber exhibits the excellent tensile strength, abrasion resistance, flexibility and recovery properties that are character.
ShinaDT is occupied in offering outstanding quality Styrene Butadiene Rubber, SBR to our precious clients.
The major part of SBR is used for production of car tires and products for automotive industry, mainly owing to their high abrasive, good resistance against thermal degradation and generation of cracks (better than NR and BR), and also thanks to lower rolling resistance.