In modern elastomer compounding and silica-reinforced tire engineering, achieving complete cross-linking efficiency without sacrificing processing stability is essential. Rubber Accelerator DPG (widely known globally as Accelerator D) serves as the industry’s benchmark diarylguanidine secondary booster. Chemically identified as 1,3-Diphenylguanidine (CAS No. 102-06-7), DPG is rarely used as a standalone cure agent due to its moderate curing speed. Instead, it acts as a powerful alkaline activator for thiazole (MBT, MBTS) and sulfenamide (CBS, TBBS) primary accelerators, while neutralizing acidic silanol groups in precipitated silica compounds to unlock full mechanical performance.
Technical Product Specifications
| Property / Parameter | Standard Specification |
|---|---|
| Chemical Name | 1,3-Diphenylguanidine (DPG / Accelerator D) |
| CAS Number | 102-06-7 |
| Molecular Formula | C13H13N3 |
| Appearance | White to off-white crystalline powder / oiled powder / dust-free granules |
| Initial Melting Point (°C) | ≥ 144.0 °C (First Grade) / ≥ 142.0 °C (Qualified Grade) |
| Loss on Drying (%) | ≤ 0.30% |
| Ash Content (%) | ≤ 0.30% |
| Specific Gravity (g/cm³) | 1.13 – 1.19 g/cm³ |
Why Choose Our DPG (D) Accelerator?
- ✓ Superior Silica Compound Activation: In high-dispersion silica passenger tire treads, DPG neutralizes acidic filler surfaces and accelerates silane coupling reactions, preventing cure retardation and lowering rolling resistance.
- ✓ Strong Synergistic Cure Boosting: When combined with thiazoles (MBT, MBTS) or sulfenamides (CBS, TBBS), small additions of DPG accelerate cross-linking velocity and elevate final tensile modulus without causing premature scorch during mixing.
- ✓ Excellent Storage Stability & Latex Gelation: Exhibits high melting stability with virtually zero decomposition during warehouse storage, while functioning reliably as a secondary gelling agent in natural and synthetic latex foam manufacturing.
Primary Applications
Accelerator DPG (D) is broadly compatible with Natural Rubber (NR), Styrene-Butadiene Rubber (SBR), Polybutadiene Rubber (BR), Nitrile Rubber (NBR), and latex emulsions:
Green Silica-Filled Tires
An indispensable secondary activator in low-rolling-resistance passenger tire treads, heavy-duty truck tires, and retread stocks reinforced with precipitated silica.
Thick-Section Molded Goods
Ideal for hard rubber articles, thick-walled vibration dampers, conveyor belt covers, and industrial rollers where steady heat transfer and uniform modulus are required.
Footwear & Latex Foams
Widely formulated into microcellular rubber shoe soles, bicycle tires, and molded natural/SBR latex foam mattresses as a controlled secondary gelling stabilizer.
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 Accelerator DPG (D) passes through extensive laboratory verification protocols—including capillary melting range testing, acid-base titration for active guanidine assay, and sieve residue screening—ensuring consistent activation kinetics and zero dispersion defects in your mixing room.
- 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 kraft paper bags (25kg) lined with protective PE film, bulk jumbo supersacks (FIBCs), and dust-free oiled granule grades suited for automated dosing systems.
⚠ Storage & Handling Guidelines
Maintaining correct climate-controlled conditions is essential to protect the free-flowing dispersion quality of Accelerator DPG. While chemically stable at room temperature, exposure to ambient humidity or intense heat can lead to powder caking and slow surface discoloration.
- • Temperature & Humidity Controls: Store the chemical inside a completely dry, cool, and well-ventilated dedicated warehouse where ambient temperatures remain below 35°C. Keep storage racks isolated from direct solar radiation, steam pipes, heating vents, and strong oxidizing agents.
- • Sealing & Stacking Management: Keep all bags tightly sealed and undamaged until immediate compounding use. Avoid excessive pallet double-stacking to prevent physical compaction or lumping during warm summer months.
- • Shelf Life & Rotation: Under proper cool, shaded warehouse conditions, our premium DPG (D) exhibits a certified shelf life of 24 months from the date of manufacture. A strict First-In, First-Out (FIFO) inventory rotation cycle is strongly recommended.
Frequently Asked Questions
Why is DPG (D) essential in silica-reinforced tire tread compounds? +
Does DPG cause staining or discoloration in light-colored rubber goods? +
What physical forms of DPG (D) do you offer for automated mixing rooms? +
What is the typical dosage range for DPG as a secondary accelerator? +
Partner with a Reliable Chemical Supplier
We provide premium-grade Rubber Accelerator DPG (D) carefully processed to meet international technical benchmarks. Available in high-purity crystalline powder and custom dust-free granule configurations to ensure absolute batch precision inside your industrial mixing environment.