HPMC Hydroxypropyl methyl cellulose HPMC powder uesd in Construction Tile adhesive Gypsum plaster and Putty

Product Details

HPMC Production Process

Hydroxypropyl methyl cellulose (HPMC) is made of refined cotton after being pulverized, alkalized with sodium hydroxide (liquid caustic soda) solution, and then added with chloromethane + propylene oxide for etherification reaction to form HPMC crude product , After neutralization (pH value adjustment), filter press, drying, crushing and sieving, pure HPMC with a certain fineness can be obtained. The finished product has a slight smell, the smell of methane.

Solubility: soluble in water
Melting point: 230℃
Main material: Refined cotton
Instructions for use: The recommended dosage of this product is 3-10‰ of the system, and the dosage needs to be determined by experiment.
Type: Chemical additives
Chemical name: Hydroxypropyl methyl cellulose
CAS number: 9004-65-3
Alias: HPMC
HS code: 3912390000
Boiling point: 1100℃
Purity: 99.99%
Molecular formula: C56H108O30
Molecular weight: 59
Structural formula:
PH value: 6~8
Density: 370-390g/l³

(1) Water solubility: it can be dissolved in water in any proportion, the highest concentration depends on the viscosity, and the dissolution is not affected by PH.
(2) Organic solubility: HPMC can be dissolved in some organic solvents or aqueous solutions of organic solvents such as dichloroethane, ethanol solution, etc.
(3) Thermal gel properties: their aqueous solutions will appear reversible gel when heated to a certain temperature, with controllable rapid-setting properties.
(4) No ionic charge: HPMC is a non-ionic cellulose ether and will not complex with metal ions or organic matter to form insoluble precipitates.
(5) Thickening property: its aqueous solution system has thickening property, and the thickening effect is related to its viscosity, concentration and system.
(6) Water retention: HPMC or its solution can absorb and retain water.
(7) Film-forming property: HPMC can be made into a smooth, tough and elastic film, and has excellent anti-oil and anti-oxidation properties.
(8) Enzyme resistance: HPMC solution has excellent enzyme resistance and good viscosity stability.
(9) PH stability: HPMC is relatively stable to acid and alkali, and the pH is not affected in the range of 3-11.