Is HPMC 200000 viscosity considered high viscosity?

Yes, Hydroxypropyl Methylcellulose (HPMC) with a viscosity of 200,000 mPa·s (millipascal-seconds) is generally considered to have a high viscosity. Viscosity is a measure of a fluid’s resistance to flow, and HPMC with a viscosity of 200,000 mPa·s will have a relatively high resistance to flow compared to lower viscosity grades.

HPMC is available in a wide range of viscosity grades, typically ranging from 5,000 mPa·s to 200,000 mPa·s or higher. The specific viscosity grade required for a particular application depends on factors such as the desired rheological properties, application method, substrate conditions, and performance requirements.

In general, higher viscosity grades of HPMC are often used in applications where a thicker consistency or greater water retention is desired, such as in thickening agents, coatings, adhesives, and cement-based products. These high-viscosity grades provide better sag resistance, improved workability, and enhanced performance in vertical or overhead applications.

It’s worth noting that viscosity alone may not fully determine the suitability of HPMC for a specific application, and other factors such as particle size distribution, purity, and chemical properties may also play a role. It’s essential to consider all relevant factors and consult product specifications and technical data sheets when selecting the appropriate viscosity grade of HPMC for a particular formulation or application.