With many advantages, styrene butadiene rubber is highly favored by various industries. If you have any purchasing needs, please feel free to contact us for purchase. We will provide you with high-quality products and services!
Styrene butadiene rubber (SBR) is a synthetic rubber made by copolymerization of butadiene and styrene, abbreviated as SBR in English. It is the most widely used synthetic rubber in the industrial field with the highest production volume. It is widely used in car and truck tires and is often used as a wear-resistant substitute for natural rubber (made from polyisoprene).
SBR rubber is popular for its excellent wear resistance and relatively good tear resistance and elongation. Here is a list of the main advantages of SBR rubber:
1. Excellent wear resistance: SBR rubber exhibits strong wear resistance in a variety of applications, especially suitable for environments with long-term contact and friction.
2. Good tear resistance: SBR rubber can effectively resist tearing and maintain its structural integrity when faced with external forces.
3. High electrical insulation: It has good electrical insulation properties and can be used in applications that require current isolation.
4. Excellent crack resistance: It can effectively resist cracks and damage caused by environmental factors and is suitable for use in harsh conditions.
5. Low compression set: Even after long-term pressure, SBR rubber can maintain its form and function and has low permanent compression set characteristics.
6. Better heat resistance than natural rubber: Compared with natural rubber, SBR shows better stability and performance in high temperature environments.
7. Resistant to non-petroleum-based fluids: SBR has strong resistance to non-petroleum-based fluids such as water, alcohols, and greases, and is suitable for a variety of special environments.
8. Odor resistance: It is not easy to absorb odors and keeps it fresh for a long time.
While SBR rubber offers numerous advantages, it also has certain limitations, some of which are similar to those of natural rubber. These disadvantages include:
1. Poor resistance to petroleum oils and fuels: SBR rubber is not well-suited for applications involving petroleum-based oils or fuels, as it can degrade when exposed to these substances.
2. Poor resistance to ozone and weathering: SBR rubber tends to deteriorate more quickly when exposed to ozone or harsh weather conditions, which can lead to cracking and loss of performance.
3. Low tensile strength: Compared to other types of synthetic rubbers, SBR has relatively low tensile strength, meaning it can stretch or break under high stress.
These limitations should be considered when selecting SBR for specific applications, especially in environments where exposure to oils, ozone, or extreme weather conditions is likely.
SBR rubber is man-made, derived from a byproduct of oil refining. It involves polymerizing Styrene and Butadiene in a controlled setting, then adding curatives and fillers like sulfur and carbon black. The resulting material is then cured or vulcanized to make a rubber part.
Abrasion Resistance: Ideal for tires, conveyor belts, and shoe soles.
Weather and Aging Resistance: Performs well in outdoor applications but may degrade under prolonged UV exposure.
Flexibility and Elasticity: Suitable for seals and gaskets, especially in ISO 4633-compliant products.
Cost-Effective: Cheaper than natural rubber (NR) and other synthetic alternatives.
| Property/Type | SBR | NBR | NR | EPDM |
| Cost | Low to moderate | Moderate to high | Moderate to high | High |
| Abrasion Resistance | Good | Excellent | Excellent | Fair to good |
| Weather/UV Resistance | Moderate | Poor | Fair | Excellent |
| Temperature Range | Moderate | Good (from -40°C to +108°C) | Good | Excellent (from -50°C to +150°C) |
| Chemical/Oil Resistance | Poor | Excellent (oil/fuel) | Poor | Poor (except water/steam) |
| Applications | Tires, footwear, general-purpose products | Seals, gaskets, fuel hoses, automotive parts | Tires, industrial products, medical supplies | Outdoor seals, roofing, automotive, construction |
Automotive: Tires, brake pads, and shock absorber seals.
Construction: Waterproofing membranes and pipe gaskets (e.g., ISO 4633 SBR rubber rings).
Footwear: Shoe soles and recycled composites for surfboard decks.
Industrial: Conveyor belts and rubber sheets.
ISO 4633: Specifies requirements for SBR rubber gaskets used in piping systems.
ISO 20299-1: Covers packaging films for SBR and BR (Butadiene Rubber).
EN 545/ISO 2531: Standards for ductile iron pipes using SBR seals.
Temperature: Softens at high temperatures and hardens in cold, but additives can mitigate this.
Chemical Exposure: Resists mild acids and alkalis but degrades in oils and solvents.
This question is common with synthetic rubbers. However, being synthetic does not mean it is toxic. In fact, SBR rubber can be formulated using all ingredients approved by the FDA.
Hardness and filler content influence friction. Softer SBR has higher friction due to larger contact surfaces, making it suitable for non-slip applications.
SBR rubber may harden over time, but the speed and duration of hardening depends on the original formulation and the storage and application of the final product.
Common SBR rubber fillers include:
With many advantages, styrene butadiene rubber is highly favored by various industries. If you have any purchasing needs, please feel free to contact us for purchase. We will provide you with high-quality products and services!