When buying hydroxypropyl methylcellulose, we often hear a term called viscosity. Viscosity plays a vital role in the application of HPMC in various industries. Viscosity is an important parameter in controlling the performance of HPMC products. Here Kemox shares some questions about “high viscosity”.
What is the Viscosity Range of HPMC?
HPMC, a versatile cellulose ether derived from natural plant fibers, exhibits a wide range of viscosities. The viscosity of HPMC is typically measured using a solution in water at a specific concentration and temperature. The viscosity is often expressed in terms of centipoise (cP) or mPa·s (millipascal-seconds). Kemox produces HPMC in viscosity classes ranging from 400 mPa·s to 200,000 mPa·s and specializes in different modifications for different applications in the construction industry.
What is Considered a High Viscosity Number?
The Relationship between Viscosity and Water Retention.
Viscosity and water retention in HPMC are intricately linked and hold significant importance in various industries. HPMC’s ability to form viscous solutions contributes to its exceptional water retention properties. As the viscosity of HPMC increases, so does its water retention capacity. The polymer’s hydrophilic nature allows it to absorb and retain water, making it an invaluable additive in construction materials, where water retention is crucial for the workability and prolonged hydration of cementitious products.
What Viscosity of HPMC is Typically Used in the Construction Field?
In the construction field, the choice of HPMC viscosity is driven by specific application requirements. Typically, construction materials use HPMC in the 50,000 mPa·s to 200,000 mPa·s range. Higher viscosity grades of HPMC are selected to fulfill specific functions such as improved water retention, enhanced processability, and extended open time.
HPMC 200000 viscosity, classified as a high viscosity product, finds widespread use in construction applications that demand superior water retention, extended setting time, and robust workability. It is particularly favored in dry mix mortars, tile adhesives, and gypsum-based products, where precise control over water content and setting time is crucial for optimal performance.