Etherification synthesis principle of hydroxypropyl methyl cellulose (HPMC)

Hydroxypropyl methyl cellulose ((HPMC), the raw material cellulose, can be refined cotton or wood pulp. It is necessary to crush it before or during the alkalization process. The crushing is done by mechanical energy. Destroy the aggregated structure of cellulose raw materials to reduce crystallinity and degree of polymerization, increase its surface area, thereby improving …

hpmc power-Why control the balance of hydroxypropyl and methoxy groups in HPMC products?

hpmc power-Why control the balance of hydroxypropyl and methoxy groups in HPMC products? The ratio of HPMC’s hydroxypropyl value to methoxy value has a great influence on the water solubility, surface activity and gel temperature of the product. If the methoxy value is high and the hydroxypropyl value is low, the water solubility and surface …

hpmc manufacturer-Analysis of the retardation effect of cellulose ether HPMC in cement mortar

hpmc manufacturer-Analysis of the retardation effect of cellulose ether HPMC in cement mortar Cellulose ether HPMC will prolong the setting time of cement paste or mortar and delay the hydration kinetics of cement, which is beneficial to increase the operating time of cement-based materials, improve the consistency of mortar and the loss of concrete slump …

What is the difference between HPMC and MC?

MC is methyl cellulose, which is made into cellulose ether by a series of reactions after the refined cotton is treated with alkali, using methyl chloride as the etherification agent. Generally, the degree of substitution is 1.6~2.0, and the solubility varies with the degree of substitution. Belongs to non-ionic cellulose ether. (1) The water retention …

Which industries are hydroxypropyl methylcellulose mainly used in?

Hydroxypropyl methylcellulose is mainly used in the construction industry-cement mortar and putty powder are the largest application industries, and their demand accounts for 70%; the coating industry-real stone paint, water-based paint, and glue will require a large amount of hydroxypropyl Methylcellulose; Construction industry applications: Plastering mortar: also called surface mortar. The addition of hydroxypropyl methylcellulose …