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HPMC Hydroxypropyl Methyl Cellulose
  • HPMC Hydroxypropyl Methyl Cellulose

HPMC Hydroxypropyl Methyl Cellulose

Granularity:100 mesh
Carbonization temperature:280-300℃
Apparent density:0.25-0.70/cm3
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HPMC Hydroxypropyl Methyl Cellulose introduce:

Description of HPMC Hydroxypropyl Methyl Cellulose

Properties: This product is a white or almost white powder, odorless, tasteless and non-toxic.

Water solubility and thickening ability: This product can be dissolved in cold water to form a transparent viscous solution

Dissolution in organic solvents: Because it contains a certain amount of hydrophobic methoxy groups, this product can be dissolved in some organic solvents, and it can also be dissolved in water and organic solvents.

Salt resistance: Since this product is a non-ionic polymer, it is relatively stable in the aqueous solution of metal salt or organic electrolyte. Surface activity: The aqueous solution of this product has surface activity, emulsification, protective colloid and relatively stable functions and properties.

Thermal gelation: The aqueous solution of this product becomes impermeable when heated to a certain temperature, until a (poly) flocculation state is formed, which makes the solution lose its viscosity. But after cooling, it will be transformed into the original solution state. The temperature at which the gel phenomenon occurs depends on the type of product, the concentration of the solution, and the heating rate.

Low ash content: Because this product has thermal gelling properties, it can be effectively refined by washing with hot water during the preparation process, so its ash content is very low.

PH stability: The viscosity of the aqueous solution of this product is stable within the range of PH3.0-11.0.

Water retention: Since this product is hydrophilic, it can be added to mortar, gypsum, paint, etc. to maintain high water retention in the product.

Shape retention: Compared with other water-soluble polymers, the deep liquid of this product has special viscoelastic properties. Its addition has the ability to keep the shape of extruded ceramic products unchanged, etc.

Lubricity: Adding this product can reduce the coefficient of friction and improve the lubricity of extruded ceramic products and cement products

Film formation: This product can produce flexible, transparent, and excellent mechanical properties, and has good oil and grease resistance.


Physical and chemical properties

Granularity:100 mesh pass rate is greater than 95.5%, 80 mesh pass rate 100%

Carbonization temperature: 280-300℃

Apparent density: 0.25-0.70/cm3 specific gravity 1.26-1.31

Discoloration temperature: 190-200℃

Surface tension: 42-56dyn/cm for 2% aqueous solution

Solubility: soluble in water and some solvents, and the aqueous solution has surface activity. High transparency, stable performance, solubility changes with viscosity, the lower the viscosity, the greater the solubility.

HPMC also has the characteristics of thickening ability, salt resistance, pH stability, water retention dimensional stability, excellent film-forming properties, and a wide range of enzyme resistance, dispersibility and adhesion.

 

Application of HPMC Hydroxypropyl Methyl Cellulose in construction industry

1. Cement mortar: improve the dispersibility of cement-sand, greatly improve the plasticity and water retention of mortar, have an effect on preventing cracks, and can enhance the strength of cement.

2. Tile cement: improve the plasticity and water retention of the pressed tile mortar, improve the adhesive force of the tile, and prevent chalking.

3. Coating of refractory materials such as asbestos: as a suspension agent and fluidity improver, it also improves the adhesion to the substrate.

4. Gypsum coagulation slurry: improve water retention and processability, and improve adhesion to the substrate.

5. Joint cement: It is added to joint cement for gypsum board to improve fluidity and water retention.

6. Latex putty: improve the fluidity and water retention of putty based on resin latex.

7. Plaster: As a paste that replaces natural materials, it can improve water retention and improve the bonding strength with the substrate.

8. Paint: As a plasticizer for latex paint, it has an effect on improving the handling performance and fluidity of paint and putty powder.

9. Spray coating: It has a good effect on preventing cement or latex spraying only material filler from sinking and improving fluidity and spray pattern.

10. Cement and gypsum secondary products: Used as an extrusion molding binder for hydraulic materials such as cement-asbestos series to improve fluidity and obtain uniform molded products.

11. Fiber wall: Because of its anti-enzyme and anti-bacterial effect, it is effective as a binder for sand walls.

12. Others: It can be used as a bubble-retaining agent for thin mortar, sand mortar and plaster operators.


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