Constructie chemicaliën cellulose ether hydroxypropyl methylcellulose hpmc

The finished product of hydroxypropyl methylcellulose is in the form of white powder or white loose fibrous solid, and the particle size passes through an 80-mesh sieve. The different ratios of methoxy content and hydroxypropyl content and different viscosities of the finished products result in different varieties with different performances. It has the characteristics of being soluble in cold water and insoluble in hot water, similar to methylcellulose, and its solubility in organic solvents exceeds its solubility in water. It can be dissolved in anhydrous methanol and ethanol, as well as in chlorinated hydrocarbons such as dichloromethane, trichloroethane, and organic solvents such as acetone, isopropanol en diaceton alcohol . Wanneer opgelost in water, combineert het met watermoleculen om een ​​colloïde te vormen . Het is stabiel voor zuren en alkalis en wordt niet beïnvloed in het bereik van ph=2 tot12. hoewel HydroxyPropyl methylcellul is niet-toxisch, niet-toxisch, niet-toxisch, niet-toxisch, het is niet-tox. produceren gewelddadige chemische reacties met oxidatiemiddelen .