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What is hydroxypropyl methyl cellulose?

2018-10-21 Hits:247

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