Rubber additives are essential functional materials in rubber formulations, used to improve processability, vulcanization efficiency, aging resistance, and final physical properties. Depending on the formulation and the demands of the application, the right combination of chemicals can enhance mixing and dispersion efficiency, fine-tune vulcanization characteristics, and improve the stability of rubber products under service conditions.
Vulcanization accelerators significantly shorten cure time and lower cure temperature while increasing crosslink density and efficiency, delivering better physical properties and higher production output.
Antidegradants protect rubber from cracking and property loss caused by oxygen, ozone, and heat aging, significantly extending the service life of the finished product.
Processing aids improve compound flow and filler dispersion, reduce mixing energy and the risk of sticking or scorch, and deliver smoother, more consistent extrusion and molding.
By regulating the rate of vulcanization and crosslinking efficiency, accelerators help shorten cure time, improve processing stability, and give rubber products sound physical and mechanical properties. Depending on the formulation and processing conditions, different accelerator types can be selected to build a suitable cure system.
Improved Vulcanization Efficiency
Accelerates the crosslinking reaction between rubber and sulfur, shortening cure time and raising throughput, while helping to build an appropriate and stable crosslink structure.
Better Processing Safety
Different accelerator types allow scorch time and cure rate to be adjusted, reducing the risk of premature vulcanization during mixing, extrusion, calendering, and molding, and giving greater flexibility in setting processing conditions.
Optimized Vulcanizate Properties
With the right cure system and accelerator combination, the strength, elasticity, abrasion resistance, and dynamic performance of rubber products can be improved to meet the requirements of different applications.
Appearance: Off-white powder
Function: Vulcanization accelerator
Chemical Formula:
C13H16N2S2
CAS No. :95-33-0
A fast, delayed-action accelerator offering both good scorch safety and high cure efficiency. It provides a rapid initial crosslinking rate and sound vulcanizate properties, making it suitable for tires and a wide range of industrial rubber products.
Appearance: Light yellow to pink granules
Function: Vulcanization accelerator
Chemical Formula:
C19H26N2S2
CAS No. :4979-32-2
A delayed-action accelerator with an extended scorch delay, offering excellent processing safety and a long scorch time. It is particularly well suited to high-temperature processing and to compounds that require extended working time, and delivers good dynamic properties after cure.
Appearance: Yellowish-white granules
Function: Vulcanization accelerator
Chemical Formula:
C11H14N2S2
CAS No. :95-31-8
A high-efficiency delayed-action accelerator with a fast cure rate and good scorch safety. It gives stable processing performance and is widely used in tires and a broad range of rubber products, allowing accelerator loading to be reduced where the formulation permits.
Appearance: Light yellow powder
Function: Vulcanization accelerator
Chemical Formula:
C7H5NS2
CAS No. :149-30-4
A general-purpose thiazole accelerator offering a fast cure rate and reliable accelerating performance. Its broad application range allows it to be used alone or in combination with other accelerators to adjust cure rate and processing behavior.
Appearance: Light yellow powder
Function: Vulcanization accelerator
Chemical Formula:
C14H8N2S4
CAS No. :120-78-5
A medium-speed thiazole accelerator with stable processing behavior and good scorch safety. Its milder reactivity compared with MBT gives a more controllable cure, making it suitable for a wide range of general-purpose rubber compounds.
Appearance: White to light yellow powder
Function: Vulcanization accelerator
Chemical Formula:
C6H12N2S4
CAS No. :137-26-8
A highly active ultra-accelerator delivering fast cure and high crosslinking efficiency. It can be used as a primary or secondary accelerator, and in certain formulations also acts as a sulfur donor, helping to fine-tune the cure system.
Appearance: Yellow powder
Function: Vulcanization accelerator
Chemical Formula:
C6H12N2S3
CAS No. :97-74-5
A high-efficiency ultra-accelerator with a fast cure rate and good processing safety. Its milder cure response compared with TMTD makes it well suited to light-colored products and to applications with demanding appearance requirements.
Appearance: Off-white powder
Function: Vulcanization accelerator
Chemical Formula:
C13H13N3
CAS No. :102-06-7
中慢速鹼性促進劑，常作為第二促進劑與噻唑類或次磺醯胺類促進劑搭配，可提升整體硫化效率並調整硫化反應速度。
Appearance: Off-white powder
Function: Vulcanization retarder /
pre-vulcanization inhibitor
Chemical Formula:
C14H15NO2S
CAS No. : 17796-82-6
A pre-vulcanization inhibitor that extends scorch time and improves processing safety, reducing the risk of premature vulcanization during mixing, extrusion, and molding without noticeably affecting the subsequent cure rate.
Provides rubber products with durable, consistent protection against aging, mitigating the effects of heat, oxygen, ozone, and repeated flexing on material performance. It helps slow degradation and preserve the physical properties and service life of the finished product.
Heat and Oxidation Resistance
Slows oxidative degradation during high-temperature processing and long-term service, reducing hardening, embrittlement, and surface tackiness.
Ozone and Flex Crack Resistance
Improves rubber's resistance to ozone and repeated dynamic deformation, reducing the risk of surface cracking. Suitable for tires, belts, and other rubber products under dynamic service.
Long-Lasting Protection
Delivers sustained protective performance, helping rubber products maintain stable physical properties and consistent quality throughout extended service and storage.
A high-efficiency multi-functional antidegradant combining excellent ozone resistance, flex crack resistance, and heat and oxidation resistance. It provides effective dynamic protection for rubber products, making it particularly well suited to tires and other high-durability rubber applications.
A heat-resistant antioxidant that effectively inhibits high-temperature oxidative aging while offering strong long-term protection. It also reduces the effect of certain metal ions on rubber degradation, making it suitable for compounds requiring heat resistance and long-term stability.
A high-purity TMQ antidegradant with low residual impurities and high active content, delivering consistent protection against heat and oxidative aging. Its lower volatility and better color make it well suited to rubber products with demanding quality and appearance requirements.
A long-lasting antidegradant for dynamic applications, offering good ozone and flex fatigue resistance together with improved non-staining performance. It can be used alongside 6PPD and other antidegradants to enhance the long-term protection of rubber products.
低污染、低變色型防老劑，具良好的耐熱性能與高溫加工穩定性，可在較高使用溫度下維持有效防護，適合對色澤、外觀及耐熱性要求較高的橡膠製品。
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