For Research and Development scientists in the chemical and materials science fields, a deep understanding of raw material specifications is crucial for successful product innovation. Polymeric MDI (PMDI), a versatile isocyanate, presents a range of technical parameters that influence its performance in various polyurethane formulations. This guide aims to clarify these specifications and highlight the benefits of sourcing high-quality PMDI from a reputable supplier like NINGBO INNO PHARMCHEM CO.,LTD.

Key Technical Specifications of Polymeric MDI

When evaluating PMDI for your R&D projects or production scale-up, consider the following critical specifications:

  • Appearance: Typically described as a brown liquid, the visual consistency of PMDI is an initial indicator of its quality. Deviations may suggest processing issues or contamination.
  • Viscosity (mPa·s at 25ºC): This parameter is vital for processing. Lower viscosities (e.g., 150-250 mPa·s) facilitate easier handling, pumping, and mixing, especially in spray applications or complex molding.
  • NCO Content (%): The percentage of isocyanate groups dictates the reactivity of the PMDI. An NCO content around 30.5-32.0% is common for industrial grades and is critical for calculating the correct stoichiometry with polyols.
  • Acid Content (%): A low acid content (e.g., ≤0.030%) is desirable as acidic impurities can catalyze unwanted side reactions, affecting foam stability and product properties.
  • Hydrolyzable Chlorides (%): Minimizing hydrolyzable chlorides is important as these can also act as catalysts and affect the final product's stability and performance. A low percentage, such as ≤0.20%, is typically preferred.
  • Density (g/cm³ at 25ºC): Knowing the density is important for mass-to-volume calculations in formulation and process design. A density around 1.220-1.250 g/cm³ is standard.

The Advantage of Partnering with NINGBO INNO PHARMCHEM

NINGBO INNO PHARMCHEM CO.,LTD. serves as a premier manufacturer and supplier of industrial-grade Polymeric MDI in China. We understand that R&D scientists require reliable data and consistent quality for their groundbreaking work. When you buy Polymeric MDI from us, you benefit from:

  • Consistent Product Quality: We adhere to strict quality control measures, ensuring that our PMDI meets or exceeds industry standards for all key specifications. This consistency is vital for reproducible research and development.
  • Technical Support: Our team can provide detailed technical data sheets and assist with understanding how our PMDI specifications align with your specific application requirements.
  • Competitive Pricing: We offer our high-quality Polymeric MDI at a competitive Polymeric MDI price, making it accessible for both R&D projects and large-scale production.
  • Reliable Supply: As a leading manufacturer, we ensure a stable and consistent supply chain, so your research and production are never interrupted.

For scientists and formulators looking to innovate with polyurethane materials, sourcing high-quality Polymeric MDI is paramount. We encourage you to contact NINGBO INNO PHARMCHEM CO.,LTD. to discuss your specific technical needs and obtain a quote for our industrial-grade PMDI. Let us support your next breakthrough.