HPMC VS CMC
Hydroxypropylmethylcellulose (HPMC) Hydroxypropylmethylcellulose (HPMC) is a kind of cellulose variety whose output and consumption have increased rapidly in recent years. It is made of refined cotton after alkalization treatment. Using propylene oxide and methyl chloride as etherifying agent, it is a non-ionic cellulose mixed ether prepared through a series of reactions. The degree of substitution