METHOCEL™ 311 Powder is a high–molecular weight hydroxypropyl methylcellulose polymer offered as a powder to thicken both water- and solvent-based formulations.
METHOCEL™ 311 is a hydroxypropyl methylcellulose (HPMC) thickener in powder format. Unlike other METHOCEL™ cellulose-based polymers that are only soluble in water, METHOCEL™ 311 exhibits good solubility in both water and organic solvents. This METHOCEL™ grade yields a viscosity of 120,000 cP at 2% in water and has the highest hydroxypropyl chemical substitution level of all METHOCEL™ grades, which is responsible for its high organosolubility property.
METHOCEL™ 311 is compatible with a number of common organic solvents, including isopropanol, ethanol, THF, DMF, and more. METHOCEL™ 311 Powder is commonly used in paint stripper and paint removal formulations. Here, METHOCEL™ allows for better vertical cling and improved dwell time such that solvents and other chemicals in these formulations are more effective at dissolving paint latexes. METHOCEL™ thickeners have excellent stability across a broad pH range and can be used in both acidic and alkaline systems. This stability also makes METHOCEL™ 311 a useful thickener for cleaning products that require stable viscosity and long shelf life. Due to its solubility in organic solvents, METHOCEL™ 311 may also be used as a binder and rheology modifier for gelled fuel applications.
Methoxyl (%): 22.0–27.0
Hydroxypropoxyl (%): 25.0–32.0
Viscosity (Brookfield RVT, spindle no. 4 at 20 rpm, 1% in methylene chloride, @ 20°C, mPa·s): 7,500
Primary Chemistry: Hydroxypropyl methylcellulose (HPMC)
Thickens common organic solvents and solvent–water blends
Reduces sag and creep on vertical surfaces
Elongates solvent-evaporation time
Outstanding pH stability from pH 3 to 11
Increases bio content in formulations; naturally derived polymer based on cellulose
Poor vertical cling of paint strippers, cleaners, and adhesives
Excessive sag and creep of paint strippers
Low viscosity of solvent-based formulations
Incompatibility of cellulose-based thickeners with organic solvents
Use of thickeners made from petroleum-derived chemicals
Paint strippers
Coating removers
Cleaners
Gelled fuels
For more information about METHOCEL™ 311 and its applications and functionality, visit our dedicated website for cellulosics here!
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