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A33
The A33 formulation is a highly standardized 33% solution of triethylene diamine (TEDA), expertly dissolved in either dipropylene glycol (DPG) or diethylene glycol (DEG). Identified globally by its CAS number (280-57-9) and fully supported by comprehensive MSDS documentation for compliant international procurement, this catalyst is engineered to deliver balanced blowing and gelation activity across diverse polyurethane systems. Featuring a molecular formula of C₆H₁₂N₂ and a molecular weight of 112.17 g/mol for the active TEDA component, the solution presents as a clear, low-odor liquid with a precise density of 0.92 g/cm³.
By transitioning pure TEDA from a crystalline solid into a liquid state, this formulation eliminates common handling challenges, preventing dust generation and material clumping on the production floor. Its fluid nature ensures exceptionally easy metering, smooth pourability, and immediate, uniform dispersion into PU matrices. Manufacturers can request flexible carrier customization (DPG or DEG) tailored to specific application requirements, making it a versatile foundational additive for both flexible and rigid foam production to optimize processing stability and enhance final product properties such as density and compressive strength.
The A33 formulation leverages an advanced amine-blocking mechanism facilitated by its glycol carrier. This specific interaction moderates TEDA’s inherently high reactivity to ensure balanced CO₂ generation (the blowing phase) and polymer network formation (the gelation phase). Maintaining this precise equilibrium prevents costly structural defects: it eliminates foam collapse in rigid applications (often caused by excessive gas generation before the polymer matrix can support it) and prevents premature curing in flexible systems (which restricts optimal foam expansion). For field applications like spray foam insulation, this controlled reactivity reduces cream time by 20-25%, providing on-site contractors with a critical operational window for efficient, uniform application without sacrificing the structural integrity of the cured foam.
The specialized glycol carrier in A33 significantly suppresses amine volatility, resulting in exceptional emission control of ≤10 ppm volatile amines during processing and after final curing. This ultra-low emission profile meets the most stringent global environmental standards, including the EU Ecolabel for construction products and UL GREENGUARD Gold for low-emission interior materials. Consequently, it is highly recommended for sensitive indoor applications, such as furniture cushions and automotive dashboards. Furthermore, its near-odorless profile (featuring an odor threshold > 50 ppm) dramatically enhances the sensory environment on the manufacturing floor, improving worker comfort and reducing the reliance on heavy, energy-intensive specialized ventilation systems.
Designed for intensive industrial processing, A33 maintains strict molecular stability under demanding conditions, characterized by a flash point of 93°C and a boiling point ≥ 200°C. This robust thermal profile allows the catalyst to perform consistently without premature degradation in extrusion temperatures up to 200°C, which is typical in continuous production lines manufacturing mattresses and insulation boards. Additionally, the liquid matrix resists chemical breakdown when in contact with aggressive chemical media such as mineral oils, gasoline, and weak acids. This chemical resilience ensures the long-term structural performance and reliability of the final polyurethane components in harsh automotive and industrial environments.
Committed to environmental responsibility, the A33 solution fully complies with REACH (Annex XVII) and RoHS regulations, guaranteeing a composition entirely free from heavy metals and chlorinated solvents. The selected glycol carrier enhances the overall biodegradability of the additive, achieving 80% degradation within 28 days per the OECD 301B test methodology. This aligns perfectly with eco-label requirements for sustainable construction materials and consumer goods. Through rigorous standardized quality control protocols, the active TEDA concentration is maintained precisely at 33%, preventing any trace impurities from interfering with the foaming reaction. Furthermore, the liquid format drastically reduces material waste and handling losses compared to traditional solid TEDA flakes.
Mattresses and Upholstery: In the production of high-resilience (HR) foams, A33 acts as a critical modifier to optimize viscoelastic properties by meticulously controlling the internal cell structure. This precise cellular control reduces compression set (a primary measure of foam durability) by 15-20% over 50,000 mechanical cycles. By preventing structural fatigue, it significantly extends the functional lifespan of the foam, serving as a major value proposition for premium bedding and furniture brands.
Automotive Seating: The catalyst enhances cell structure uniformity (maintaining a strict cell size of 100-300 μm) within flexible molded foams. This uniformity dramatically improves the load-bearing capacity (achieving ≥ 400 N) while simultaneously preserving the required surface softness (indentation force deflection ≤ 100 N). This specific balance of support and yield is critical for minimizing vibration transfer and maximizing driver and passenger comfort during transit.
Industrial Insulation: When formulated into PU/PIR foam jackets for chilled water pipelines and HVAC infrastructure, A33 accelerates a uniform curing process that improves overall thermal resistance (λ-value ≤ 0.022 W/m·K). This optimized thermal barrier effectively reduces heat loss by 30% when compared to traditional fiberglass insulation, making it the preferred energy-saving choice for commercial building climate control systems.
Protective Packaging: The catalyst's ability to drive cross-linking while maintaining strict closed-cell integrity (yielding ≥ 90% closed cells) ensures superior impact resistance. When utilized in custom foam inserts for sensitive electronics (e.g., smartphones, laptops) and delicate medical devices, this rigid structural integrity absorbs shock efficiently, reducing transit and shipping damage rates by up to 25%.
Structural Bonding: A33 efficiently accelerates the cross-linking phase in one-component moisture-cured PU adhesives. By promoting rapid internal curing, it achieves a reliable shear strength ≥ 2.5 MPa within just 24 hours of application. This rapid strength development makes it highly suitable for demanding structural bonding tasks involving metal, wood, and engineered plastics in both furniture assembly and construction.
Construction Sealants: In the formulation of elastomeric joint sealants, the catalyst enhances the polymer's elongation at break (≥400%). This extreme flexibility allows the cured sealant to effortlessly accommodate continuous thermal expansion and contraction in building facades, bridges, and infrastructure, ensuring absolute weather resistance and waterproof integrity across extreme ambient temperatures ranging from -40°C to 80°C.
To accommodate diverse production scales, the A33 solution is supplied in robust 200KG standard drums, alongside a variety of industrial bulk packaging options. Every shipment is prepared to meet global logistics and safety compliance standards, ensuring secure, leak-proof transit and smooth customs clearance for international procurement.
For optimal preservation of the chemical matrix, always use stainless steel or HDPE containers to prevent glycol degradation and external contamination. Strictly avoid the use of copper or brass containers, piping, or fittings, as the leached metal ions can act as unwanted catalysts, accelerating amine breakdown and ruining the solution.
Store the product in a climate-controlled environment maintained at 10-35°C in a dry, well-ventilated area, strictly away from direct sunlight and heat sources. Freezing conditions must be avoided, as extreme cold can cause phase separation of the glycol and amine components; if the product does become frozen, thaw it gradually at room temperature and mix gently before use to completely restore its uniform liquid state.
During transfer and processing, keep the solution completely away from water (which can inadvertently dilute the precise 33% concentration) and strong acids (which will rapidly neutralize the active amines), to prevent irreversible catalyst deactivation. When stored in unopened, original containers under these recommended conditions, the guaranteed shelf life is 12 months.
The following table outlines the exact physical and chemical parameters of the A33 catalyst solution, verified through our standardized laboratory testing protocols to ensure consistent performance in your polyurethane formulations.
| Parameter | Value |
| Appearance | Clear, colorless liquid |
| TEDA Concentration | 33% (w/w) |
| Density (25°C) | 0.92 g/cm³ |
| Viscosity (25°C) | ≤5 mPa·s |
| Flash Point | 93°C (PMCC) |
| Amine Value | 300-350 mg KOH/g |
Backed by a large-scale manufacturing base and a dedicated R&D team composed of industry-leading chemists, we guarantee the batch-to-batch stability required for continuous, high-volume polyurethane production. Understanding that formulation tuning is critical to manufacturing success, we offer rapid dispatch of testing samples for laboratory evaluation. Furthermore, our senior technical engineers are available to collaborate directly with your production team, providing expert guidance on optimizing PU foam formulations, adjusting reaction profiles, and troubleshooting complex manufacturing challenges.
