Ads by Google
Hydroxypropyl methyl cellulose
Technical specifications:1) Methoxyl content: 28.0 - 30.0% 2) Hydroxypropoxyl content: 7.0 - 12.0% 3) Gelation temperature: 58.0 - 64.0°C 4) Loss or drying: ≤5.0% 5) Burnt residues: ≤1.0% 6) PH value (1% solution at 25°C): 4.0 - 8.0 7) Viscosity (2% solution at 20°C): 5 - 100,000mPa.sPhysical properties:1) Appearance: HPMC is a white or light gray pellet or fibril power with odorless and tasteless2) Solubility: hardly dissolves in waterless ethanol, aether or acetone, expands as to clear or slightly muddy colloid solution in cold water; it can dissolve in some organic solvents or some water-organic components3) Pellet: 100 screen passable rate is over 98.5%, 80 screen passable rateis 100% Dissolving process:HPMC will agglomerate when directly added to water and then dissolve. In this wayit dissolves very slow and hard. Suggested methods as followers:1) In hot water: add water in container to 1/3 or 2/3 of its content, heatedto over 80°C, because HPMC doesn't dissolve in hot water, it uniformly disperses in hot water; add cool water or ice to the residual content, stir and cool down the mixture2) Powder combination: mix HPMC with identical volume of other powder, disperses them sufficiently then add water to the mixture result HPMC dissolves without agglomeration3) Organic solvent wet: dispersed or wet with organic solvents, such as ethanol, glycol or oil, then add water can cause HPMC completely dissolves Applications:HPMC is mainly used as dispersant in the production of PVC and as thickener, stabilizer, emulsifier, excipient, water retention agent, film-forming agent in petrochemical, building materials, agrochemical, ink, printing and dyeing of textile, paper making and cosmetics. Transportation and storage:1) Keep dry where good ventilated2) Do not wet and keep away from sunshine during transportationPacking:25kg/multi-paper bag or kraft paper bag
Hydroxypropyl Methylcellulose (HPMC) --USP grade