METHOCEL™ F50 is a low–molecular weight hydroxypropyl methylcellulose (HPMC) thickener that yields a viscosity of 50 cPs at 2% in water.
METHOCEL™ F50 is a water-soluble polymer based on cellulose with low hydroxypropyl substitution and high methoxy content. It is offered as a white powder soluble in water. When added at 2% to water, this polymer provides thickening to yield a solution with 50 cPs of viscosity. Therefore, METHOCEL™ F50 is typically used as a thickener for low-viscosity solutions. The polymer also gives rise to shear-thinning rheology, allowing it to be used as a rheology modifier in applications that require both good flowability under shear and increased adhesion in the absence of shear. METHOCEL™ F50 has outstanding pH stability in both acidic and alkaline environments, allowing for flexibility in formulations.
METHOCEL™ F50 also has utility beyond thickening. In PVC applications, the cellulose polymer is used as a suspending agent that forms a protective colloid around vinyl chloride droplets as polymerization occurs. METHOCEL™ F50 will reversibly gel at temperatures above 68°C. Therefore, it will boost green strength when used in adhesive and ceramic applications. In agricultural suspension concentrates, METHOCEL™ F50 will help prevent crystal growth in active ingredients with low solubility.
Methoxyl (wt%): 27.0–30.0
Hydroxypropoxyl (wt%): 4.0–7.5
Viscosity (2% in water, at 20°C, cPs): 40–60
Primary Chemistry: Hydroxypropyl methylcellulose (HPMC)
Primary Chemistry: Hydroxypropyl methylcellulose (HPMC)
Low gelation temperature
Forms a semifirm gel
Reversible gelation
Thermoplastic polymer
Shear-thinning rheology modifier
Suspending agent
Improves lubricity in high-solid applications
Cellulose-based, naturally derived thickener
Wide pH stability from pH 2 to 13
Excessive viscosity build caused by rheology modifiers with a high molecular weight
Difficulty applying and spreading high-solids coatings and adhesives
Unstable viscosity of formulations exposed to extreme pH levels
Decreases in viscosity caused by exposure to heat
Poor green strength prior to thermal sintering of ceramics
Unpredictable vinyl chloride polymer physical properties
Use of thickeners not derived from natural sources like cellulose
Coatings
Inks
Adhesives
Ceramics
PVC
Suspension concentrates
For more information about METHOCEL™ F50 and its applications and functionality, visit our dedicated website for cellulosics here!
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