Hydroxypropyl Methylcellulose
HPMC is the abbreviation for hydroxypropyl methylcellulose, a non-ionic cellulose mixed ether. It possesses thickening, water-retaining, and film-forming properties, and is widely used in building materials, pharmaceuticals, food, and other fields.
HPMC Properties
Chemical Properties: White powdery cellulose derivative, soluble in cold water and some organic solvents. Aqueous solutions exhibit high transparency (methoxyl content 28-30%, hydroxypropoxyl content 7-10%).
Thermal Stability: Gel temperature varies with methoxyl content; carbonization temperature 280-300℃; discoloration temperature 190-200℃.
Physical Properties: Viscosity range 3-50 mPa·s (varies greatly between different grades); bulk density 0.25-0.70 g/cm³.