WANNATE CDMDI-100L Carbodiimide-Modified MDI for PU Elastomers
WANNATE CDMDI-100L is a carbodiimide-uretonimine-modified 4,4-diphenylmethane diisocyanate (MDI), engineered for exceptional application versatility across the polyurethane industry. As a pale yellowish green liquid at room temperature, it delivers consistent performance in multiple PU systems.
Multi-Application Coverage| Application Field | Typical Products |
|---|---|
| Cellular PU Elastomers | Shoe soles, airless tires, microcellular components |
| Flexible Integral Skin Foam | Automobile bumpers, splashboards, steering wheels, seat head-rests, arm rests |
| Shock Dampers & Spoilers | Automotive NVH parts, impact absorption components |
| Adhesives | Structural bonding, multi-substrate lamination |
| Coatings | Protective PU coatings, industrial finishes |
| Prepolymers | Custom-formulated NCO-terminated prepolymers for downstream processing |
- Broad Formulation Window: The carbodiimide-uretonimine modification provides enhanced compatibility with diverse polyol types, enabling a single isocyanate to cover multiple end-use products.
- Consistent NCO Content (28.0-30.0%): Tight specification control ensures predictable stoichiometry across different PU formulations, reducing recalibration when switching between applications.
- Low Viscosity Profile (25-60 mPa.s at 25 Degree C): Excellent processability for casting, spraying, and molding operations without excessive preheating.
- High Purity: Low acid content (<=0.040%) and low chromatic number (<=60 APHA) minimize side reactions, delivering cleaner final products with superior color stability.
- Liquid at Room Temperature: Eliminates the need for melting equipment, simplifying handling and reducing processing costs across all application lines.
| Property | Specification |
|---|---|
| Appearance | Pale yellowish green liquid |
| NCO Content | 28.0-30.0% |
| Viscosity at 25 Degree C | 25-60 mPa.s |
| Acid Content | <=0.040% |
| Chromatic Number (APHA) | <=60 |
Available in 210L nitrogen-sealed iron drums (240kg/drum) and 18L pails (20kg/pail). Store at 20-30 Degree C in a well-ventilated area. Protect from moisture and frost. If crystallization occurs below 15 Degree C, heat to 70-80 Degree C and agitate thoroughly before use. Shelf life: 6 months under recommended conditions.
Q1: What is the recommended storage condition for CDMDI-100L?
A: Store at 20-30 Degree C in a well-ventilated, dry indoor warehouse. Keep containers tightly sealed under nitrogen blanket when not in use to prevent moisture contamination.
Q2: Does CDMDI-100L crystallize during storage or transport?
A: Yes, crystallization may occur when the temperature drops below 15 Degree C. If crystallization happens, uniformly heat the product to 70-80 Degree C with thorough agitation before use. Avoid localized overheating, which can degrade product quality.
Q3: What makes CDMDI-100L different from standard MDI grades?
A: The carbodiimide-uretonimine modification gives CDMDI-100L a lower viscosity (25-60 mPa.s), liquid form at room temperature, and broader polyol compatibility. This allows it to serve multiple application lines with a single isocyanate, reducing inventory complexity.
Q4: How does moisture exposure affect CDMDI-100L performance?
A: CDMDI-100L reacts readily with atmospheric moisture to form insoluble polyureas, which can increase viscosity, reduce NCO content, and compromise final product quality. Always use nitrogen-sealed packaging and minimize open-air exposure during handling.
For more information, refer to the product SDS or contact our technical service center.
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