Hydroxypropyl methylcellulose (HPMC) belongs to the group of cellulose ethers in which hydroxyl groups have been substituted with one or more of the three hydroxyl groups present in the cellulose ring (Fig. 3.10). HPMC is hydrophilic (water soluble), a biodegradable, and biocompatible polymer having a wide range of applications in drug delivery, dyes and paints, cosmetics, adhesives, coatings, agriculture, and textiles.
|Surface tension||42-56dyne/cm for 2% aqueous solution|
HPMC is used primarily in construction materials like tile adhesives and renders where it is used as a rheology modifier and water retention agent.
Functionally HPMC is very similar to HEMC (hydroxy ethyl methyl cellulose) Trade names include Methocel and Walocel. The global leading producer is now DuPont, formerly manufactured under Dow Wolff Cellulosics GmbH.
(Hydroxypropyl)methyl cellulose use as thickener for aqueous and non-aqueous systems, clear films with grease resistance, binders, lubricants, steric stabilizer and water retention aid. Dissolves in water, undergoes reversible gelation upon heating, non-ionic, does not complex with ionic species and is surface actuce and enzyme resistant. Solutions are pseudoplastic.
25kg woven bag with liner