Hydroxypropyl methyl cellulose, also known as hydroxypropanmethyl cellulose, cellulose hydroxypropyl methyl ether, is highly pure cotton cellulose as raw material, under alkaline conditions.
The main use of hydroxypropyl methyl cellulose is reflected in the construction industry, ceramic manufacturing industry, coating industry, ink printing, plastic, medicine and other industries, this product is also widely used in leather, paper products industry, fruit and vegetable preservation and textile industry.
It is a product that is soluble in water and most polar C and an appropriate proportion of ethanol / water, propanol / water, dichloroethane, but it is not soluble in ether, acetone, anhydrous ethanol, and can swell into a clarified or slightly turbid colloidal solution in cold water.Its aqueous solution has surface activity, high transparency, the performance is relatively stable.HPMC also has the properties of hot gel, its aqueous solution can form a gel dilution, and will dissolve after getting cold. Different specifications of product gel temperature is different.The solubility varies with the viscosity, and the lower the viscosity, the greater the solubility.The properties of HPMC vary naturally, and the pH value has no effect on the dissolution of HPMC in water.Granularity: 100 items pass rate is greater than 98.5%.Heack density: 0.25-0.70g/ (usually 0.4g /), specific gravity 1.26-1.31. Discolor temperature: 180-At 200℃, the carbonization temperature: 280-300℃.The methoxy group was 19.0% to 30.0% and the hydroxypropyl group was
4%~12%。Viscosity (22℃,2%)5~200000mPa.s.Gel temperature (0.2%): 501 to 90℃.