What Are the Dissolution Methods of Hydroxypropyl Methyl Cellulose (HPMC)?
Feb 11, 2022
Hydroxypropyl methyl cellulose (HPMC) is widely used in construction materials, coatings, synthetic resins, ceramics, pharmaceuticals, food, textiles, agriculture, cosmetics, tobacco and other industries. HPMC can be divided into construction grade, food grade and pharmaceutical grade according to its usage. Food grade and pharmaceutical grade HPMC are the main export products of Anhui Keynovo. Today, Keynovo will take you to know the dissolution method of hydroxypropyl methyl cellulose (HPMC).
1.Hot water dissolution method: Since HPMC does not dissolve in hot water, HPMC can be evenly dispersed in hot water at the initial stage, and then quickly dissolved when it cools down. Two typical methods are described as follows.
1) Put the required amount of hot water in the container and heat it to about 70℃. Gradually add hydroxypropyl methylcellulose under slow stirring, at first HPMC floats on the surface of water, then gradually form a slurry, and cool the slurry under stirring.
2) Add the required amount of 1/3 or 2/3 of water in the container and heat it to 70°C. Disperse HPMC and prepare a hot water slurry as in 1); then add the remaining amount of cold water to the hot water slurry and cool the mixture after stirring.
2.Powder mixing method: Mix HPMC powder with a large amount of other powdery material ingredients, mix thoroughly with a mixer, and then add water to dissolve it afterwards, then HPMC can be dissolved at this time without holding and coalescing, because each tiny little corner, only a little bit of HPMC powder, will be dissolved immediately when it meets water. --Putty powder and mortar manufacturers use exactly this method. [ Hydroxypropyl methyl cellulose (HPMC) is used as a thickening agent and water retention agent in putty powder mortar].
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