What is IS-90/G Predispersed Masterbatch?

IS-90/G predispersed masterbatch is a widely used rubber chemical additive designed for rubber vulcanization and compounding processes. It mainly contains insoluble sulfur with an active content of approximately 90%, together with dispersing agents and carrier materials that help improve sulfur distribution in rubber compounds.

Compared with conventional sulfur powder, IS-90/G provides cleaner handling, better dispersion, and more stable processing performance. Because of these advantages, it has become an important material in modern tire manufacturing and industrial rubber production.

In the rubber industry, predispersed insoluble sulfur is valued for its ability to improve vulcanization consistency while reducing processing problems such as sulfur blooming and uneven curing.

Composition and Characteristics of IS-90/G

IS-90/G predispersed masterbatch is typically composed of insoluble sulfur, polymer carriers, dispersing agents, and processing aids. The “90” generally refers to the sulfur content, while “G” usually indicates granular form.

One of the main characteristics of IS-90/G is its excellent dispersion performance. Uniform sulfur distribution is essential for achieving stable vulcanization and consistent physical properties in finished rubber products.

Another important advantage is reduced dust generation. Traditional sulfur powder can create airborne dust during handling and mixing, while predispersed sulfur masterbatch helps maintain a cleaner and safer production environment.

In addition, IS-90/G offers good thermal stability and compatibility with automated rubber processing systems, making it suitable for modern high-efficiency manufacturing lines.

Advantages of IS-90/G in Rubber Manufacturing

Using IS-90/G predispersed masterbatch can significantly improve rubber processing efficiency and product quality.

First, it enhances mixing uniformity. Better sulfur dispersion helps manufacturers achieve more stable curing performance and reduces the risk of uneven vulcanization.

Second, IS-90/G helps minimize sulfur blooming. Since insoluble sulfur has low solubility in rubber compounds, it is less likely to migrate to the rubber surface during storage or processing.

Another advantage is improved workplace safety. Reduced dust levels help create cleaner production conditions and lower the risk of material waste.

Furthermore, the granular form of IS-90/G supports accurate feeding and efficient operation in automated production systems, which is especially important for large-scale tire manufacturing.

Applications of IS-90/G in the Rubber Industry

IS-90/G predispersed masterbatch is widely used in various rubber applications that require stable vulcanization and reliable mechanical performance.

One of the most common applications is tire manufacturing. Tire compounds require precise sulfur distribution to achieve excellent durability, heat resistance, and dynamic performance.

IS-90/G is also used in conveyor belts, rubber hoses, seals, gaskets, and automotive rubber parts. In these applications, predispersed sulfur helps improve processing consistency and final product quality.

Because of its stable curing performance and easy handling, IS-90/G has become an important rubber vulcanization additive in many industrial rubber products.

Storage and Handling Recommendations for IS-90/G

To maintain product quality, IS-90/G should be stored in a cool, dry, and well-ventilated environment away from direct sunlight and excessive heat.

The product should remain sealed before use to prevent moisture contamination and maintain processing stability. Proper storage conditions can also help extend shelf life and preserve dispersion performance.

Manufacturers are also advised to follow standard industrial safety procedures during handling and transportation.