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HEC (hydroxyethylcellulose) is a water-soluble polymer synthesized by the reaction of ethylene oxide with cellulose.
Aqueous solutions of HEC have excellent characterisstics for applications as thickeners, water-retention agents, suspending and dispersing agents, and as protective colloids.
In the synthesis of hydroxyethylcellulose, the avarage number of moles of ethylene oxide that combines with each mole of cellulose (MS) is used as an index.
The value of MS in HEC is controlled within 1.5 to 2.5.
Hydroxypropyl Methylcellulose (HPMC), also known as Hypromellose, is a semisynthetic polymer derived from plant cellulose. It is a white or off-white powder that is soluble in water and forms a viscous gel-like substance. HPMC is commonly used in various industries, including pharmaceuticals, food, cosmetics, and construction.