Optimize Your Rubber Line: The Strategic Advantage of Granular Antiscorching Agent PVI (CTP)

In the high-stakes world of rubber manufacturing, “scorch” is the enemy of efficiency. While Antiscorching Agent PVI (CTP) has long been the industry standard for preventing early vulcanization, the physical form of the additive matters just as much as its chemistry.

If you are still using powder forms of PVI, you are likely dealing with dust issues, material waste, and inconsistent dosing. Shifting to Granular PVI isn’t just a material change—it’s an operational upgrade.

Here is why top-tier rubber compounders are standardizing on the granular form.

1. The “Dust-Free” Factory Floor

Environmental, Health, and Safety (EHS) regulations are tightening globally. Powder additives are notorious for creating airborne dust, which poses respiratory risks to workers and contamination risks to other production lines.

Granular PVI solves this immediately.

• Zero Dust: The granules are robust and do not break down into fine powder during transport or handling.
• Clean Handling: Whether you use automatic weighing systems or manual scooping, the material stays in the hopper, not in the air.
• Reduced Loss: You pay for the material that goes into the mixer, not the material that gets sucked into the ventilation system.

2. Superior Flow and Automation Readiness

Modern rubber mixing lines rely on precision. Powders often bridge or cake in hoppers, leading to stoppages or inaccurate dosing.

Our Granular PVI is engineered for free-flowing performance. The uniform particle size ensures it flows like water through automatic dosing systems. This guarantees that if your recipe calls for 0.2 phr, you get exactly 0.2 phr—batch after batch.

3. Dispersion: The Hidden Quality Factor

A common misconception is that powders disperse faster. In reality, fine powders can agglomerate (clump together) inside the rubber matrix, creating “hot spots” of retarder that weaken the final product.

Our granules are designed with a specific binder system that breaks down instantly under shear force in the internal mixer. This ensures:

• Rapid distribution throughout the compound.
• No “white spots” in finished goods.
• Consistent scorch safety across the entire batch.

4. Uncompromised Chemical Performance

Mechanically, it handles better. But does it work chemically? Absolutely.

Our Granular PVI (N-(cyclohexylthio)phthalimide) provides a predictable delay in the onset of cure (scorch time) without affecting the rate of cure once it begins or the final physical properties of the rubber.

• Processing Safety: Allows for higher processing temperatures and faster mixing speeds without risking burning the stock.
• Storage Stability: Improves the shelf life of uncured green rubber compounds.
• Versatility: Compatible with Natural Rubber (NR) and Synthetic Rubbers (SBR, BR, NBR, CR, EPDM).

5. Ideal Applications

This product is specifically optimized for manufacturers producing high-specification rubber goods where consistency is non-negotiable:

• Tire Industry: Tread compounds, carcasses, and sidewalls.
• Automotive Parts: Hoses, seals, and vibration control mounts.
• Conveyor Belts: Heavy-duty belts requiring long mixing cycles.
• Footwear: Soles requiring complex molding.

Technical Specifications at a Glance

Ready to Clean Up Your Production?

Stop fighting with dust and inconsistent flow. Switch to Granular Antiscorching Agent PVI and experience the difference in handling and performance.