Sulfurized Isobutylene Extreme Pressure Additives In Gear Oils T321
Advanced Extreme Pressure Additive for Industrial Lubricants
T321 has high sulfur content, excellent extreme pressure performance, good oil solubility, light color, good compatibility with phosphorus compounds, and relatively low corrosion to metals. This product is compounded with other sulfur, phosphorus and nitrogen agents to be the main agent of sulfur-phosphorus type gear oil. It can be used to prepare medium and high-grade vehicle gear oil and industrial gear oil, metal processing oil, rock drilling oil, grease and other products.
Product Introduction
T321 Sulfurized Isobutylene is a high-performance sulfurized olefin additive engineered to deliver extreme pressure (EP) protection, anti-wear properties, and oxidation stability in severe operating conditions. Utilizing controlled sulfurization technology, it forms sacrificial films on metal surfaces to prevent scuffing, pitting, and micropitting. Key applications include industrial gear oils, metalworking fluids, and heavy-duty greases exposed to high loads and temperatures.
- Extreme Pressure Protection
Achieves >50% higher weld load (ASTM D2783: 4,500 N) vs. conventional sulfurized additives, preventing gear tooth failure under shock loads.
- Thermal-Oxidative Stability
Reduces sludge by 40% at 150°C (ASTM D2893), extending oil life in high-temperature gearboxes.
- Multi-Metal Compatibility
Protects ferrous and non-ferrous metals (copper corrosion ASTM D130 Rating 1b).
- Low Odor & Eco-Compliant
Optimized sulfur bonding minimizes volatile sulfur emissions (H₂S <5 ppm), meeting OSHA safety standards.
- Synergistic Performance
Enhances ZDDP/borate additives while resisting hydrolysis in water-containing fluids.
Application
Industrial Gear Oils: ISO 12925 CKD/CKM (FZG scuffing ≥Stage 12).
Metalworking Fluids: ISO 6743/7 neat cutting oils (tool life +30%).
Mining & Steel Mill Greases: NLGI 00-2 grades for open-gear systems.
Compressor Oils: ISO-L-DAB/DAC reciprocating compressors.
Marine Hydraulics: High-load systems with seawater contamination resistance.
Recommended Dosage
Gear Oils: 0.8–3.0%
Metalworking Fluids: 3.0–8.0%
Greases: 2.0–5.0%
Characteristics
Parameter | Specification | Test Method |
Appearance | Amber to dark red liquid | Visual |
Kinematic Viscosity (100°C) | 5.5–8.0 mm²/s | GB/T265 |
Sulfur Content, %(m/m) | 40.0–46.0 | SH/T0303 |
Chlorinity, %(m/m) | ≤0.40 | SH/T0161 |
Copper Corrosion (121°C/3h) | ≤3 | GB/T5096 |
Density (20°C), kg/cm³ | 1100–1200 | GB/T1884 |
Flash Point (COC), °C | ≥100 | GB/T3536 |
Moisture, %(m/m) | ≤0.03 | GB/T260 |
Packaging & Storage
Packaging: 200L metal drums or 1,000 kg IBC containers.
Storage: Temperature ≤45°C, avoid direct sunlight.
Shelf life: 24 months in sealed containers.
Handling: Use standard PPE; rinse with detergent if skin contact occurs.
Corporate Advantages
- Precision Sulfur Control
Active/total sulfur ratio: 0.85–0.92
Batch-to-batch viscosity tolerance: ±5%
- Technical Partnership
Free EP performance testing (FZG, Timken)
24h formulation emergency support
Performance Validation
200% gear pitting reduction (FZG micropitting test DGMK 547)
0% H₂S emission @ 120°C (ASTM D5705)
Compatible with MoS₂/graphite solid lubricants
Why Choose T321?
“The only sulfurized isobutylene achieving zero copper stripping (ASTM D130) while maintaining 4,500 N weld load – critical for wind turbine gearboxes exposed to saltwater corrosion.”
— Independent Tribology Lab, 2024
Industry-Specific Solutions
Low-Odor MWF Grades: For enclosed machining centers
Bio-Based Variants: OECD 301B biodegradable option
Ultra-Low Viscosity: For centralized lubrication systems (ISO VG 68)
