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Sulfurized Isobutylene (SIB) - High-Performance Extreme Pressure Additive
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Sulfurized Isobutylene (SIB) Manufacturer Extreme Pressure Additive Supplier
CAS No: 68511-50-2
Description：
High-quality Sulfurized Isobutylene (SIB) manufacturer. Featuring 45%+ sulfur content for superior EP performance in gear oils and metalworking fluids. Full TDS/MSDS/COA provided.
Category：
Extreme Pressure (EP) Additive
Product Details
Sulfurized Isobutylene (SIB) - High-Performance Extreme Pressure Additive
As a premier manufacturer and industrial supplier, Chemost offers high-purity Sulfurized Isobutylene (SIB). Known for its exceptional extreme pressure (EP) properties and high active sulfur content, our SIB is the primary building block for modern gear oils and heavy-duty industrial lubricants.
Product Overview: What is Sulfurized Isobutylene?
Sulfurized Isobutylene belongs to the Sulfurized Olefin family. It is synthesized by reacting isobutylene with sulfur or sulfur-containing compounds. In the industry, there are two primary manufacturing routes:
- Atmospheric Pressure Method: Used for standard grades.
- High-Pressure Method: A more advanced synthesis process that ensures a more stable chemical structure and better solubility in refined base oils.
At Chemost, we utilize high-pressure synthesis to ensure our SIB provides a high sulfur concentration (typically 45% and above) while maintaining low odor and excellent compatibility.
Technical Specifications
Our SIB is engineered to meet the rigorous demands of API GL-4 and GL-5 gear oil formulations.
Property | Typical Value | Test Method |
|---|---|---|
Appearance | Light Yellow to Amber Liquid | Visual |
Sulfur Content (wt%) | 44.0 - 48.0 | ASTM D129 |
Active Sulfur Content (wt%) | 20.0 - 25.0 | ASTM D1662 |
Flash Point (COC) ℃ | > 100 | ASTM D92 |
Density (20℃, g/cm³) | 1.10 - 1.20 | ASTM D1298 |
Kinematic Viscosity (40℃) | 10 - 60 mm²/s | ASTM D445 |
Solubility | Soluble in Mineral & Synthetic Base Oils | Visual |
Application Guidance & Formulating
Sulfurized Isobutylene is the most critical Extreme Pressure (EP) additive for gear lubrication. Its primary function is to form a sacrificial chemical film on metal surfaces under high-load and high-temperature conditions to prevent welding and galling.
- Core Applications:
- Automotive Gear Oils: Essential for GL-5 and GL-4 hypoid gear protection.
- Industrial Gear Oils: Used in heavy-duty machinery lubricants (CKD/CKT).
- Metalworking Fluids: Acts as a high-efficiency additive for cutting and tapping fluids.
- Synergistic Formulations:
To create a complete lubricant package, SIB should be blended with:
- Antioxidants (Phenolic/Aminic): To prevent oil thickening at high temperatures.
- Anti-wear (AW) Agents: Often used with ZDDP or phosphorus-based additives to provide protection under lower load conditions.
- Metal Deactivators: Crucial for protecting yellow metals (copper/brass) from the activity of the sulfur content.
- Corrosion Inhibitors: To provide long-term rust protection for iron and steel components.
The Chemost Advantage for B2B Partners
High Sulfur Potency: Our 45%+ sulfur content allows blenders to achieve high EP performance with lower treat rates, reducing overall formulation costs.
Excellent Oil Solubility: Compatible with Group I, II, and III mineral oils, as well as PAO synthetic bases.
Comprehensive Documentation: We support your quality control and regulatory compliance by providing:
- TDS (Technical Data Sheet)
- MSDS (Material Safety Data Sheet)
- COA (Certificate of Analysis) for every batch.
Reliable Supply Chain: As a direct factory, we offer stable pricing and flexible packaging (200L drums, IBC tanks, or bulk ISO tanks).
Frequently Asked Questions (FAQ)
Q: Does your SIB have a strong odor?
A: While all sulfurized olefins have a distinct scent, our high-pressure manufacturing process significantly reduces volatile mercaptans, resulting in a lower-odor product compared to atmospheric-process alternatives.
Q: Is this product safe for copper alloys?
A: SIB contains active sulfur, which can be corrosive to yellow metals at high temperatures. We recommend using it in conjunction with our Metal Deactivators (Yellow Metal Dimers) to mitigate this effect.
Q: What is the typical treat rate for a GL-5 gear oil?
A: Depending on the total package design, SIB is typically used at 1.5% to 4.0% by weight.
Q: Can I get a sample for bench testing?
A: Yes. We provide 500ml samples for laboratory analysis and pilot blending.
Why Choose Us
We believe that as long as we provide high-quality services to our customers, CheMost Additives CO., LTD's products will always gain the trust and support of our customers and have a stable market.
Our factory
We have over 20 professional chemical reactor,the annual production capacity of the products can reach 20,000 tons, while ensuring quality, we can provide stable and continuous supply.
Our warehouse
We are well aware that for the stable supply of chemical products, storage is the foundation. In the face of the ever-changing global market environment, a sustainable storage capacity is of vital importance.
Our laboratory
Long-term cooperation cannot be achieved without stable product quality. Under the supervision of over 20 pieces of testing equipment and 70 tests, the quality of the products is qualified and stable.
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