Views: 1 Author: Site Editor Publish Time: 2021-03-22 Origin: Site
HPMC hydroxypropyl methylcellulose
Antifungal It has relatively good anti-mold ability and good viscosity stability during long-term storage.
PH stability The viscosity of the hydroxypropyl methyl cellulose aqueous solution is hardly affected by acid or alkali, and the pH value is relatively stable in the range of 3.0 to 11.0.
The shape retention Since the highly concentrated aqueous solution of hydroxypropyl methylcellulose has special viscoelastic properties compared with the aqueous solutions of other polymers, its addition has the ability to improve the shape of extruded ceramic products.
water retention Hydroxypropyl methyl cellulose has the hydrophilicity and the high viscosity of its aqueous solution, and it is a highly effective water-retaining agent.
soluble in water some organic solvents can dissolve in cold water. Its concentration is only determined by the viscosity. The solubility changes with the viscosity. The lower the viscosity, the greater the solubility.
salt resistance Hydroxypropyl methyl cellulose is a non-ionic cellulose ether and is not a polyelectrolyte. Therefore, when metal salts or organic electrolytes are present, it is relatively stable in aqueous solutions, but excessive addition of electrolytes can cause gelation and precipitation.
surface activity Because the aqueous solution has surface active function, it can be used as a colloidal protective agent, emulsifier and dispersant.
Thermal gel When the hydroxypropyl methylcellulose aqueous solution is heated to a certain temperature, it becomes opaque, gels, and precipitates, but when it is continuously cooled, it returns to the original solution state, and the temperature at which this gelation and precipitation occurs Mainly depends on their lubricants, suspending agents, protective colloids, emulsifiers and so on. There are other characteristics of hydroxypropyl methylcellulose, thickener, film former, adhesive, lubricant, suspending agent, protective colloid, emulsifier, etc.