Sulfurized Isobutylene-high pressure

Description

Product Introduction

This product with high content of sulfur has excellent extreme pressure performance, good oil solubility, and light color.It has good compatibility with compounds containing phosphorus and relatively little corrosion to metal.

Application

It is used for blending medium and high quality automobile and industrial gear oils, metalworking oil, gadder oils and grease.

Reference Dosage

The recommended dosage is 1.5% ~5.0%.

• Our laboratory ensures lubricants perform optimally in extreme cold conditions, preventing viscosity thickening, poor pumpability, and lubrication failure.
• Key low-temperature testing includes:
  ✅ Cold Cranking Simulator (CCS, ASTM D5293) – Evaluates an oil’s ability to allow easy engine start-up in cold conditions.
  ✅ Mini-Rotary Viscometer (MRV, ASTM D4684) – Assesses low-temperature pumpability and potential wax crystallization at sub-zero temperatures.
  ✅ Pour Point Test (ASTM D97 / ASTM D5949) – Determines the lowest temperature at which the oil remains fluid.
  ✅ Brookfield Low-Temperature Viscosity Test (ASTM D2983) – Measures kinematic viscosity at -40°C or lower, crucial for industrial and automotive applications.
  ✅ Low-Temperature Torque Test (ASTM D4693) – Evaluates the performance of greases in cold environments.
  ✅ Flow Pressure of Lubricating Greases (DIN 51805-2) – Measures a grease’s ability to flow at extremely low temperatures.

Sulfurized isobutylene is a high-pressure lubricant additive used in automotive, industrial, and marine applications. It is commonly used as an extreme pressure (EP) additive in gear oils, hydraulic fluids, and greases.

Sulfurized isobutylene is produced by reacting isobutylene with sulfur under high pressure and high temperature conditions. The sulfur molecules react with the double bonds in the isobutylene chain, resulting in the formation of sulfur bridges between adjacent polymer chains. This cross-linking process increases the viscosity and improves the load-carrying capacity of the lubricant.

The sulfur bridges formed in the sulfurization process provide a protective film on metal surfaces, reducing wear and friction. This makes sulfurized isobutylene an effective EP additive, particularly in high-pressure and high-temperature applications. It also offers excellent oxidation resistance and thermal stability, ensuring long-lasting lubricant performance.

In addition to its EP properties, sulfurized isobutylene acts as a detergent-dispersant additive, keeping the lubricant clean by preventing the formation of sludge and deposits. It also enhances the corrosion protection of the lubricant, protecting metal surfaces from rust and corrosion.

As with any chemical additive, the concentration of sulfurized isobutylene in the lubricant formulation can vary depending on the specific application and performance requirements. The recommended treat rates typically range from 1% to 5% by weight.

Overall, sulfurized isobutylene is a versatile high-pressure lubricant additive that improves the performance and durability of lubricants in a wide range of applications. Its EP, detergent-dispersant, and corrosion protection properties make it a valuable component in various lubricant formulations.