Views: 0 Author: Site Editor Publish Time: 2022-02-09 Origin: Site
Hydroxypropyl methylcellulose(HPMC) alias: cellulose hydroxypropyl methyl ether; Hydroxypropyl methyl cellulose,Hypromellose HPMC; E464; MHPC; Hydroxypropyl methylcellulose. Hydroxypropyl methyl cellulose; CAS no. : 9004-65-3 Molecular weight: 86000.00000 Appearance and properties: white or almost white fibrous or granular powder Density: 1.39 g/cm3 Solubility: almost insoluble in anhydrous ethanol, ether and ketone; Swelling in cold water to form a clear or slightly turbid colloid solution Stability: Solids are flammable and incompatible with strong oxidants. Appearance: white or almost white powder. Granularity; 100 mesh > 98.5%; 80 mesh. Special size of particle size 40 ~ 60 mesh. Carbonization temperature: 280-300℃ Apparent density: 0.25-0.70g/cm(usually around 0.5g/cm), specific gravity 1.26-1.31. Color changing temperature: 190-200℃ Surface tension: 42-56dyn/cm in 2% aqueous solution. Solubility: soluble in water and some solvents, such as appropriate proportion of ethanol/water, propanol/water, etc. Aqueous solution has surface activity. High transparency, stable performance, different specifications of the product gel temperature is different, solubility changes with the viscosity, the lower the viscosity, the greater the solubility, different specifications of HPMC performance has a certain difference, HPMC solution in water is not affected by pH value. The surface activity of HPMC decreased with the decrease of methoxyl content, the increase of gel point and the decrease of water solubility. HPMC also has thickening ability, salt resistance low ash powder, pH stability, water retention, dimensional stability, excellent film forming, as well as a wide range of resistance to enzyme, dispersity and bonding characteristics. Main uses: HPMC is used as thickener, dispersant, binder, exciphant, oil resistant coating, filler, emulsifier and stabilizer in textile industry. Also widely used in synthetic resin, petrochemical, ceramic, paper, leather, medicine.