Hydroxypropyl methyl cellulose
Hydroxypropyl methyl cellulose is a kind of white or slightly yellowish powder, odorless, tasteless, and non-toxic. The product can be dissolved in cold water to form a transparent viscous solution. The aqueous solution of this product has surface activity so that it has emulsification, protective colloids and relative stability. PH Stability: the aqueous solution viscosity of this product is relatively stable in the range of PH 3.0—11.0. As the product is non-ionic, and in the preparation process can be effectively purified by washing with hot water, it has a very low ash content. Hydroxypropyl methylcellulose products can fully meet the standards for use of medicine, food, construction and personal care products.
|Specification||60 (E)||65 (F)||75 (K)|
|Gelling temperature (℃)||58-64||62-68||70-90|
|Viscosity(cps)||3; 5; 6; 15; 50; 400; 4000; 10000; 20000; 30000;
40000; 50000; 100,000 150,000;200,000
Physical and chemical properties
*Particle size:98.5% passes through 100 mesh; 100% passes through 80 mesh.
*Charring temperature: 280-300℃.
*Bulk density: 0.25-0.70 g/cm3 (Usually around 0.5 g/cm3 )
*Real specific gravity:1.26-1.31.
*Browning temperature: 190-200℃.
Surface tension:(2% water solution) 42-56dyn.cm.
*Properties: Dissolved in water and some organic solvent such as ethanol. propyl alcohol. ethylene chloride, the water solution is of surface activity. It is a nonionic surface active agent. Gelation temperature is different for different grades. For example, among 60RT Hydroxypropyl Methylcellulose, 60 is gelation temperature, Namely, 2% water solution will form gelation at 60%.