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High-purity 4,4'-diphenylmethane diisocyanate (MDI) with minimal monomeric impurities for consistent reactivity and reduced VOC emissions.
Excellent hydrolytic stability and low moisture sensitivity, enabling extended pot life and reliable processing in ambient conditions.
Precision-engineered for controlled crosslinking kinetics—ideal for one-component polyurethane systems requiring balanced cure speed and workability.
Enables formulation of high-performance elastomers and coatings with superior mechanical strength, abrasion resistance, and chemical durability.
Compatible with standard polyol blends and catalysts, supporting seamless integration into existing PU manufacturing infrastructure.
Single-component moisture-curing polyurethane adhesives for automotive assembly and structural bonding.
High-resilience elastomeric coatings for industrial flooring, tank linings, and corrosion protection.
Castable polyurethane elastomers used in mining screens, conveyor pulleys, and heavy-duty wear parts.
Reaction injection molding (RIM) systems for automotive trim, bumpers, and energy-absorbing components.
Sealants and joint fillers in construction applications requiring long-term UV stability and weather resistance.
| Chemical Type | 4,4'-Diphenylmethane diisocyanate (MDI), purified liquid |
| Product Form | Liquid at room temperature |
| Appearance | Clear, pale yellow to amber liquid |
| NCO Content (wt %) | 33.4–33.8% |
| Viscosity (25 °C, mPa·s) | 150–250 |
| Acidity (as HCl, wt %) | ≤ 0.01% |
| Water Content (wt %) | ≤ 0.02% |
| Storage Stability | Stable under dry, nitrogen-blanketed conditions at 15–25 °C for ≥12 months |
Q1: What is the primary function of BASF MS Pure MDI Curing Agent in moisture-curing systems?
A: It serves as a highly reactive, low-viscosity polyisocyanate curing agent that enables rapid crosslinking upon exposure to ambient moisture, delivering excellent mechanical strength, chemical resistance, and adhesion in one-component sealants and adhesives.
Q2: How does BASF MS Pure MDI differ from conventional aromatic MDI-based curing agents?
A: BASF MS Pure MDI is specifically purified and stabilized for moisture-curing applications, offering improved storage stability, reduced sensitivity to premature gelation, and enhanced compatibility with silane-terminated polymers compared to technical-grade MDI blends.
Q3: What types of base polymers is this curing agent typically compatible with?
A: It is designed for use with silane-terminated prepolymers (STPs), including those based on polyethers and polyesters, and demonstrates good miscibility and reactivity across a broad range of MS polymer formulations.
Q4: What safety and handling precautions should be observed during processing?
A: As with all isocyanates, appropriate personal protective equipment (PPE) — including nitrile gloves, safety goggles, and respiratory protection in poorly ventilated areas — must be used. Processing should occur under dry conditions to avoid uncontrolled reaction with moisture, and containers must remain tightly sealed when not in use.
Q5: Can BASF MS Pure MDI be used in formulations intended for indirect food contact applications?
A: While the product itself is not inherently prohibited for such uses, final regulatory compliance depends on the complete formulation, processing conditions, and applicable regional food contact legislation — users must conduct full regulatory assessment and validation prior to deployment in food-related applications.
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