Hydroxypropyl methylcellulose is specially used for construction
Characteristics of building special hydroxypropyl methylcellulose products:
Solute in water and some organic solvents can be dissolved in cold water, its highest concentration is only determined by the viscosity, the solubility changes with the viscosity, the lower the viscosity, the greater the solubility.Hydroxypropyl methyl cellulose for salt resistance building is non-ionic cellulose ether, and is not polymeric electrolyte, so in the presence of metal salt or organic electrolyte, relatively stable in aqueous solution, but excessive addition of electrolyte, can cause gel and precipitation.Surface activity because aqueous solution has suractive function, can serve as a colloidal protective agent, emulsifier and dispersant.Special hydroxypropyl methyl cellulose solution when heated to a certain temperature, it becomes opaque, gel, forming precipitation, but in continuous cooling, it returns to the original solution state, and the temperature of this gel and precipitation mainly depends on dry their lubricant, antisuspension agent, protective colloid, emulsifier, etc.
Mildew resistance has good resistance and good viscosity stability in long-term storage.
The viscosity of PH stability building special hydroxypropyl methylcellulose water solution is almost unaffected by acid or base, and the PH value is relatively stable in the range of 3.0 to 11.0.
Shape retention Because the highly concentrated aqueous solution of hydroxypropylmethylcellulose for construction has special viscoelastic energy compared with the aqueous solution of other polymers, its addition has the ability to improve the shape of extrusion ceramic products.The hydrophilic nature of hydroxypropyl methyl cellulose and the high viscosity of its aqueous solution is a high efficiency water retaining agent.
Other characteristics: thickener, film-forming agent, adhesive, lubricant, auxiliary levitation agent, protective colloid, emulsifier, etc.