What is hydroxypropyl methyl cellulose?
2018-10-21 Hits:475
Hydroxypropyl methyl cellulose (HPMC) is a non-ionic cellulose ether made from natural polymer cellulose by a series of chemical processing. They are an odorless, odorless, nontoxic white powder that swells in cold water to form a clear or slightly turbid colloid solution. It has the characteristics of thickening, adhesion, dispersion, emulsification, film formation, suspension, adsorption, gel, surface activity, water retention and protective colloid. Hydroxypropyl methyl cellulose and methyl cellulose can be used in building materials, coating industry, synthetic resin, ceramic industry, medicine, food, textile, agriculture, daily chemical and other industries. Target requirements: Appearance: white or white powder, odourless and tasteless. PH: (1% solution): 4.5-8.0 Surface tension: 4225-230 Carbonization temperature: 225-230 Color change temperature: 190-200 Decomposition temperature: 200Min Apparent density: 0.25-0.70 Density: 1.26-1.31 Packing: 25kg/ bag ISO9001:2000 certification Methoxy: 19.0~24.0 Hydroxypropyl: 4.0~12.0 Gel temperature: 53~90 Chemical equation: Hydroxypropyl methyl cellulose (HPMC) [C6H7O2 (OH) 3-m-n (OCH3) m (OCH2CH (OH) CH3) n]x X= polymerization degree, R=-H, -CH3, -CH2CHOHCH3