Sulfurized Isobutylene (T321), commonly known as sulfurized isobutylene or di-tert-butyl polysulfide, is a yellow oily transparent liquid.
It features excellent extreme-pressure and anti-wear performance, good oil solubility, and high structural stability.
This product is widely used as a primary additive for various industrial and automotive gear oils, and can also be applied in the formulation of anti-wear hydraulic oils and other lubricants.
Features
-Outstanding AW performance under extreme pressure conditions
-Good oil solubility
-High thermal stability
Packaging and Storage
Packaging:Available in 200-L steel drums, 1000-L IBC containers, or 20,000-L tank containers.
Storage:Store in a dry, well-ventilated warehouse at ambient temperature, protected from light (especially when using transparent or semi-transparent containers).The product may also be stored in large-capacity, dry, clean metal containers with nitrogen blanketing.
Technical Specifications and Test Methods
Item | Typical Value | Test Method | |
Appearance | Light yellow | Visual inspection | |
Oil Solubility | Clear, no sediment | Visual inspection (1) | |
Color, No. | ≤ 2 | ASTMD1500 | |
Moisture % (v/v) | ≤ 0.03 | GB/T260 | |
Mechanical impurities % | ≤ 0.05 | GB/T511 | |
Flash point (COC), °C | ≥ 100 | GB/T3536 | |
Kinematic viscosity (100 °C), mm²/s | ≤ 4.0 | GB/T265 | |
Density (20 °C), kg/m³ | 1000-1100 | GB/T13377-2010 | |
Volatile sulfur-containing gas, ppm | ≤ 10 | Specialized Instrument | |
Sulfur content (mass fraction), % | 40～46 | GB/T17040-2019(2) | |
Copper strip corrosion (121 °C, 3 h) | ≤ 4a | GB/T5096(3) | |
Four-Ball Test PD, kg | ≥ 500 | GB/T3142(3) | |
Thioether component % | S2 ≤ 20 | Gas Chromatography | |
S3 ≥ 50 | |||
S4 ≤ 35 | |||
1、 After being thoroughly mixed at room temperature (20℃), the blend of 5% (m/m) GDT321C and 95% (m/m) base oil [60% (m/m) HVI150BS + 40% (m/m) HVI500] should appear clear and free from sediment upon visual inspection. 2、 The sulfur content in GDT321C can be determined using methods other than GB/T17040-2019 as well. 3、 5% (m/m) GDT321 + 95% (m/m) base oil [60% (m/m) HVI150BS + 40% (m/m) HVI500] | |||
