For procurement managers, R&D scientists, and formulators in the polyurethane (PU) industry, understanding the precise technical specifications of raw materials is fundamental to successful product development and manufacturing. Silicone oil, a key additive for flexible PU foams, is no exception. NINGBO INNO PHARMCHEM CO.,LTD., as a leading manufacturer and supplier of PU raw material additives, provides high-quality silicone oils that meet exacting standards. This guide breaks down the essential technical specifications you need to consider when you plan to buy silicone oil for your flexible foam applications. Knowing these details ensures you can accurately assess product suitability and compare offerings from different suppliers. The goal is to select an additive that guarantees optimal foam structure and performance.

Key Technical Specifications to Review:

  • CAS Number: The Chemical Abstracts Service (CAS) number is a unique identifier for chemical substances. For many effective silicone oils used in PU flexible foam, the CAS number 68037-64-9 is commonly associated with poly(dimethylsiloxane) ethoxylate/propoxylate copolymers. Confirming this number with your supplier is crucial for product identification and regulatory compliance.
  • Appearance: Typically, a high-quality silicone oil for PU foam applications is described as a transparent liquid. This visual characteristic indicates purity and absence of particulate contamination, which could interfere with the foaming process or degrade the final foam properties.
  • Density: Density is a key physical property. For this type of silicone oil, a typical density range is between 1.03 to 1.08 g/cm³. This parameter is important for accurate dosing in formulations and for shipping calculations.
  • Viscosity: While not always a primary focus for simple foam stabilization, viscosity can influence the processing and final foam texture. Many effective products fall into a medium viscosity range, ensuring good spreadability and effective surface tension modification.
  • Shelf Life: Manufacturers usually specify a shelf life, often around 12 months when stored correctly. Proper storage conditions (cool, dry, well-ventilated, away from direct sunlight and heat) are critical to maintain product integrity and performance over time. This information is vital for inventory management.
  • Packaging: Silicone oils are commonly supplied in drums, typically 20kg or 200kg. This information is important for logistics planning and handling within your facility.

Why these specifications matter when you buy:

These technical details are not just for cataloging; they directly impact the performance of your flexible PU foam. A precisely specified silicone oil ensures consistent bubble stabilization, leading to uniform cell morphology, improved mechanical properties, and predictable foam behavior. NINGBO INNO PHARMCHEM CO.,LTD. is committed to transparency and quality. As your trusted manufacturer and supplier from China, we provide detailed product specifications to empower your purchasing decisions. We encourage you to request our product data sheets to verify these specifications and understand how our silicone oil can enhance your flexible foam formulations. Partner with us for reliable chemical auxiliaries and expert technical support.