redispersible latex powder RDP for tile adhesivesDecember 7th 2023
The characteristics and benefits of hydroxypropyl methylcellulose used in building materials
There are many characteristics and benefits of hydroxypropyl methylcellulose used in building materials. Qingquan Chemical will give you a detailed introduction:
Characteristics of hydroxypropyl methylcellulose
It has good anti-mold ability and good viscosity stability during long-term storage.
2. PH stability
The viscosity of 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.
Three, 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.
Fourth, water retention
Hydroxypropyl methyl cellulose has the hydrophilicity and the high viscosity of its aqueous solution, which is a highly effective water retaining agent.
Five, soluble in water
And some organic solvents can be dissolved 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.
6. Salt resistance
Hydroxypropyl methyl cellulose is a non-ionic cellulose ether and is not a polyelectrolyte. Therefore, in the presence of metal salts or organic electrolytes, it is relatively stable in aqueous solutions, but excessive addition of electrolytes can cause gelation and precipitation.
Seven, surface activity
Because the aqueous solution has surface active function, it can be used as a colloidal protective agent, emulsifier and dispersant.
8. 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 aids, protective colloids, emulsifiers and so on. There are other characteristics of hydroxypropyl methylcellulose, thickener, film former, adhesive, lubricant, suspending agent, protective colloid, emulsifier, etc.