4..Hydroxypropyl methyl cellulose (HPMC) dissolution methods 

Hot water dissolution method: because HPMC is not dissolved in hot water, so early HPMC can be evenly dispersed in hot water, and then quickly dissolved when cooling, two typical methods are described as follows:

1)、Fill the container with as much hot water as you need and heat it to about 70℃. Hydroxypropyl methyl cellulose is gradually added under slow stirring, and HPMC floats on the surface of water, and then gradually forms a slurry, which is cooled under stirring

2)、Add 1/3 or 2/3 of the required amount of water into the container and heat it to 70℃. Disperse HPMC according to method 1) to prepare hot water slurry; Then add the remaining cold water to the hot water slurry and cool the mixture after stirring.

3) Powder mixing method: HPMC powder and a large number of other powdery material ingredients, fully mixed with blender, then add water to dissolve, at this time HPMC can dissolve, and not agglomerate, because each tiny corner, only a little HPMC powder, water will immediately dissolve.

5.What are the  Hydroxypropyl methyl cellulose (HPMC)  main raw materials?

Hydroxypropyl methyl cellulose (HPMC) main raw materials: refined cotton, chloromethane, propylene oxide, other raw materials, tablet alkali, acid, toluene, isopropyl alcohol, etc.

6.What’s the fuction about the HPMC in putty powder ?

HPMC in putty powder, thickening, water retention and construction of three roles. Thickening: cellulose can be thickened to suspension, so that the solution remains uniform up and down the role of anti-flow hanging. Water retention: make putty powder dry slowly, auxiliary gray calcium in the action of water reaction. Construction: cellulose lubrication, can make putty powder has good construction. HPMC does not participate in any chemical reactions, but only plays a supporting role. Putty powder and water, on the wall, is a chemical reaction, because of the generation of new substances, the wall of the putty powder down from the wall, ground into powder, and then use, not good, because has formed a new substance (calcium carbonate).