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.
Specifications
Specification 60 (E) 65 (F) 75 (K)
Gelling temperature (℃) 58-64 62-68 70-90
Methoxy (WT%) 28.0-30.0 27.0-30.0 19.0-24.0
Hydroxypropoxy (WT%) 7.5-12.0 4.0-7.5 4.0-12.0
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%.
