METHOCEL™ F4M is a medium molecular weight hydroxypropyl methylcellulose (HPMC) thickener. At an addition level of 2%, it yields a viscosity of 4,000 cPs. It is widely used in ceramics processing, coatings, adhesives, and chemical processing.
METHOCEL™ F4M is a water-soluble HPMC polymer with low hydroxypropyl substitution and high methoxy content. It is naturally derived from cellulose and imbues thixotropic properties to water-based solutions. It is an excellent thickener, binder, and suspension aid for applications that require good lubricity and easy spreadability, such as coatings, inks, and adhesives. METHOCEL™ F4M has outstanding pH stability in both extremely acidic and alkaline environments, making it an ideal rheology modifier for cleaning products. METHOCEL™ F4M will reversibly gel at temperatures above 68°C, dramatically increasing green strength for ceramic extrusion applications.
Methoxyl (%): 27.0–30.0
Hydroxypropoxyl (%): 4.0–7.5
Viscosity (2% in water at 20°C, cPs): 3,500–5,600
Primary Chemistry: Hydroxypropyl methylcellulose (HPMC)
Yields optimum performance at a lower concentration
Can be added directly to aqueous systems
No ionic charge
Stable from pH 2 to 13
Reversible thermal gelation properties; gel goes back into solution upon cooling
Sagging of paints and coatings on vertical and overhead surfaces
Poor adhesion of cleaners to vertical or overhead surfaces
Instability of coatings, inks, and adhesives containing suspensions or emulsions
Unstable viscosity and poor green strength of ceramic slurries
Friction and extrusion pressure of screw extruders used in ceramic extrusion
Defects of screw extruded ceramics parts due to poor green strength
Loss of viscosity at high temperatures
Use of rheology modifiers that are not based on renewable resources like cellulose
Ceramics
Coatings
Inks
Adhesives
For more information about METHOCEL™ F4M and its applications and functionality, visit our dedicated website for cellulosics here!
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