Several major factors affecting the water retention of hydroxypropyl methylcellulose

Hydroxypropyl methylcellulose (HPMC) is a non-ionic cellulose ether made from natural polymer material cellulose through a series of chemical processes. They are an odorless, tasteless and nontoxic white powder that swells into a clear or slightly cloudy colloidal solution in cold water. It has thickening, binding, dispersing, emulsifying, film-forming, suspending, adsorbing, gelling, surface active, moisture-retaining and protective colloid properties. Hydroxypropyl methyl cellulose and methyl cellulose can be used in building materials, paint industry, synthetic resin, ceramic industry, medicine, food, textile, agriculture, daily chemical and other industries.

The water retention of hydroxypropyl methylcellulose HPMC product itself is often affected by the following factors:

1. The amount of hydroxypropyl methylcellulose HPMC added The greater the amount of cellulose ether HPMC added, the higher the water retention rate and the better the water retention effect. In the range of 0.25-0.6% addition, the water retention rate increases rapidly with the increase of the addition amount; when the addition amount further increases, the increase trend of the water retention rate slows down.

2. HPMC viscosity of hydroxypropyl methylcellulose When the viscosity of HPMC increases, the water retention rate also increases; when the viscosity reaches a certain level, the increase in water retention rate tends to be gentle.

3. Hydroxypropyl methylcellulose HPMC thermal gel temperature High thermal gel temperature, high water retention rate; otherwise, low water retention rate.

4. Hydroxypropyl methylcellulose HPMC homogeneity HPMC with uniform reaction, methoxyl and hydroxypropoxyl are evenly distributed, and the water retention rate is high.