In high-throughput rubber processing, controlling the precise onset of vulcanization is crucial for eliminating material waste. Rubber Anti-Scorching Agent CTP (also widely known as PVI) serves as the global standard pre-vulcanization inhibitor. Chemically classified as N-(Cyclohexylthio)phthalimide (CAS No. 17796-82-6), CTP provides excellent scorch safety for compounds utilizing sulfenamide, thiazole, or thiuram accelerator systems. By temporary trapping active sulfur fragments during processing, it extends processing times at elevated temperatures without altering the final vulcanization cure rate or cross-link density.
Technical Product Specifications
| Property / Parameter | Standard Specification |
|---|---|
| Chemical Name | N-(Cyclohexylthio)phthalimide (CTP / PVI) |
| CAS Number | 17796-82-6 |
| Molecular Formula | C14H15NO2S |
| Appearance | White or light yellow crystalline powder / oiled powder / granules |
| Initial Melting Point (°C) | ≥ 90.0 °C |
| Loss on Drying (%) | ≤ 0.30% (≤ 0.40% for oiled configurations) |
| Ash Content (%) | ≤ 0.10% |
Why Choose Our CTP (PVI) Anti-Scorching Agent?
- ✓ Exceptional Scorch Mitigation: Even at small dosages (typically 0.1 to 0.5 phr), CTP significantly postpones premature vulcanization during high-temperature internal mixing, calendering, and extrusion runs.
- ✓ Enhanced Compound Storage Safety: Unvulcanized green stocks blended with CTP can be stored safely for extended periods, even in high-humidity or warm summer climates, without losing processing performance.
- ✓ Full Compound Customization & Efficiency: Incorporating CTP allows compounders to utilize fast-curing primary accelerators or higher mixing temperatures to reduce batch cycle times, optimizing manufacturing throughput.
Primary Applications
CTP (PVI) is highly effective in natural rubber (NR), styrene-butadiene rubber (SBR), butadiene rubber (BR), and nitrile rubber (NBR) compounding recipes:
Tire Manufacturing
Crucial for high-shear steel cord skimming compounds, complex multi-component tread extrusions, and large-scale OTR tire components vulnerable to heat accumulation.
Extruded & Calendered Goods
Perfect for conveyor belts, industrial profiles, marine hoses, and sheet stocks that require long continuous runs without downstream equipment fouling.
Molded & Reclaimed Rubber
Highly effective in formulations using high fractions of alkaline reclaimed rubber or basic secondary accelerators like DPG to precisely manage processing margins.
Quality Assurance & Global Compliance
As a leading global partner in industrial chemical manufacturing, we understand that raw material purity, molecular consistency, and strict regulatory tracking directly safeguard your production line metrics. Our advanced manufacturing facilities maintain rigorous quality configurations to ensure total compliance and confidence across all international markets:
- Advanced Laboratory Quality Control: Every commercial batch of our Anti-Scorching Agent CTP (PVI) passes through extensive laboratory verification protocols—including capillary melting range profiling, high-performance liquid chromatography (HPLC) for purity validation, and microanalysis for thermal stability—ensuring absolute matrix uniformity and zero performance variance in your compounding plant.
- Comprehensive International Regulatory Compliance: We maintain a highly proactive approach to global chemical governance. All export shipments are systematically backed by complete regulatory documentation, including up-to-date, comprehensive multilingual GHS Safety Data Sheets (SDS), detailed Certificates of Analysis (CoA), and official tracking credentials fully matching EU REACH and US TSCA parameters.
- Optimized Packaging & Workspace Safety: To lower material handling loss and eliminate airborne chemical dust cross-contamination on your factory floor, we offer tailored logistics configurations. This includes standard multi-wall moisture-resistant paper bags (25kg), heavy bulk jumbo supersacks (FIBCs), and dust-controlled oiled configurations perfectly suited for automated weighing systems.
⚠ Storage & Handling Guidelines
Maintaining correct climate-controlled conditions is essential to protect the molecular performance stability of Anti-Scorching Agent CTP. Because it exhibits sensitivity to high temperatures and persistent dampness, sub-optimal warehouse conditions can induce slow chemical breakdown or structural lumping.
- • Environmental Controls: Store the chemical inside a completely dry, cool, and well-ventilated dedicated warehouse. Ensure that storage racks remain isolated from direct solar heating, steam pipes, high-temperature conduits, open flame hazards, and active chemical raw materials.
- • Sealing Management: Keep all industrial bags completely tied and undamaged during processing. Partially consumed packaging elements must be mechanically re-sealed immediately to minimize exposure to indoor workshop humidity.
- • Shelf Life & Rotation: Under standard cool, shaded warehouse conditions, our premium CTP exhibits a certified shelf life of 12 months from the date of manufacture. A strict First-In, First-Out (FIFO) batch cycle is strongly advised to maximize production uniformity.
Frequently Asked Questions
How does CTP (PVI) prevent scorch without slowing down the final cure? +
Does adding CTP (PVI) impact the physical or mechanical traits of cured rubber? +
Which commercial forms of CTP (PVI) do you currently offer? +
Partner with a Reliable Chemical Supplier
We provide premium-grade Rubber Anti-Scorching Agent CTP (PVI) carefully processed to ensure exceptional pre-vulcanization inhibition parameters. Available in high-purity fine powder and custom dust-free configurations to ensure absolute batch precision inside your industrial mixing environment.