For formulators and process engineers working with polyurethane (PU) materials, a thorough understanding of Polymeric MDI (PMDI) specifications is crucial for achieving optimal foam performance. As a leading manufacturer and supplier, NINGBO INNO PHARMCHEM CO.,LTD. is dedicated to providing high-quality PMDI and the technical knowledge needed to leverage its capabilities effectively.

Polymeric MDI, identified by its CAS No. 9016-87-9, is characterized by several key parameters that dictate its behavior in PU foam production. The NCO content, typically ranging from 30.5% to 32.0%, is a critical indicator of the reactive isocyanate groups available for reaction with polyols. A precise NCO content ensures predictable reaction kinetics and foam properties.

Another vital specification is viscosity. For PMDI, a viscosity between 150-250 mPa·s at 25°C is common. This parameter is essential for handling, pumping, and mixing the material. Lower viscosity generally facilitates easier processing, especially in spray foam applications or when the MDI needs to be effectively dispersed with other components.

The appearance of Polymeric MDI is typically described as a brown liquid. Deviations from this description could indicate impurities or degradation. Purity, often reflected in low acidity (e.g., ≤0.030%) and hydrolyzable chlorine content (e.g., ≤0.20%), directly impacts the stability of the reaction and the quality of the final PU foam. High levels of acidity or chlorine can interfere with catalysis and lead to unwanted side reactions or corrosion.

When you buy Polymeric MDI, it's important to ensure these specifications align with your process requirements. At NINGBO INNO PHARMCHEM, we maintain rigorous quality control to ensure our PMDI consistently meets these critical parameters. Our commitment as a manufacturer means we focus on the details that matter for your application, whether it's for rigid insulation, coatings, or adhesives.

Understanding these specifications allows procurement managers and R&D scientists to make informed decisions when sourcing. It ensures that the Polymeric MDI purchased will perform as expected, contributing to the desired foam density, cell structure, compressive strength, and thermal insulation efficiency. As a trusted chemical supplier, we are always available to provide detailed technical data and support to help you select the right product.

In conclusion, mastering the technical specifications of Polymeric MDI is fundamental to maximizing the performance of polyurethane foam. NINGBO INNO PHARMCHEM CO.,LTD. provides high-quality PMDI along with the technical expertise to ensure your success. Contact us to learn more about our products and specifications.