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Highly selective palladium-based heterogeneous catalyst for controlled C–N coupling reactions.
Thermally stable up to 180 °C, enabling robust performance in extended batch and continuous processes.
Low metal leaching (<0.5 ppm Pd in final product), meeting stringent pharmaceutical and agrochemical purity requirements.
Engineered with proprietary carbon support for enhanced dispersion and reproducible activity across batches.
Compatible with common polar aprotic solvents (e.g., DMF, NMP, THF) and tolerant of moderate moisture levels.
Synthesis of active pharmaceutical ingredients (APIs) involving Buchwald–Hartwig amination.
Production of specialty agrochemical intermediates, including heteroaryl amine derivatives.
Manufacture of high-performance electronic materials, such as conductive polymer precursors.
Catalytic preparation of functionalized OLED host and emitter molecules.
Scale-up of fine chemical building blocks requiring high chemo- and regioselectivity.
| Chemical Type | Palladium on carbon (Pd/C), modified with nitrogen-doped support |
| Product Form | Free-flowing black powder |
| Appearance | Black granular solid |
| Palladium Content | 5.0 wt% ± 0.3 wt% |
| Primary Applications | Buchwald–Hartwig amination, C–N cross-coupling |
| Key Features | High turnover number (TON > 50,000), air-stable packaging |
| Storage Conditions | Store under inert atmosphere at 2–25 °C; keep container tightly sealed |
| Handling Precautions | Avoid contact with strong oxidizers; use in well-ventilated area with appropriate PPE |
Q1: What is the primary function of N-4000 in polyurethane systems?
A: N-4000 is a highly selective tertiary amine catalyst designed to promote urethane (polyol–isocyanate) reactions while minimizing unwanted side reactions such as trimerization or hydrolysis. It is particularly valued for enabling balanced reactivity profiles in flexible and rigid foams, coatings, and adhesives.
Q2: Is N-4000 compatible with common polyol types and isocyanates used in industrial formulations?
A: Yes, N-4000 demonstrates broad compatibility with conventional polyester and polyether polyols, as well as aromatic and aliphatic isocyanates including MDI, TDI, and HDI-based prepolymers. Its solubility and stability support consistent performance across diverse formulation chemistries.
Q3: How should N-4000 be handled and stored to maintain optimal activity?
A: Store N-4000 in its original sealed container at temperatures between 15°C and 30°C, protected from moisture, direct sunlight, and strong oxidizing agents. Avoid prolonged exposure to ambient humidity or elevated temperatures, which may affect catalytic efficiency over time.
Q4: Can N-4000 be used in low-emission or high-solids applications?
A: Yes — N-4000 exhibits low volatility and minimal odor, making it suitable for formulations targeting reduced VOC emissions and improved workplace safety. It is frequently selected for water-blown foams and solvent-free adhesive systems where catalyst residual content and off-gassing are critical considerations.
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E-mail: wangxingqiang@ericwchem.com
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