Appearance: White powder.
Particle size: 98.0%min through 100mesh.
Charring temperature: 280-300 Deg.C.
Bulk density: 0.25-0.70g/cm3(Usually around 0.5g/cm3)
Real specific gravity: 1.26-1.31
Browning temperature: 190-200 Deg.C.
Surface tension (2% water solution):42-56 dyn/cm.
Physical and Chemical Propertiesl
1.Appearance:HPMC is white or whitish fibrillar/granular and odorless powder.
2.Dissolvability:HPMC is dissolvable in cold water and become clear or slightly
cloudy liquidcement,but hardly in absolute ethyl alcohol,ethylether or propanone. In addition,HPMC is dissolvable in some organic solvevts or soce mixed solvents of water and organic solvent.
3.Granularity:Throughput rate:≥98.5%for 100 mesh and up to 100%for 80 mesh.
4.Apparent Density:0.30-0.70g/cm3,and density:1.26-1.31g/cm3.
Application
It is widel used as thickener, adhesive, water preserving agent, film-forming
agent in construction, building materials, dispersion coating, wallpaper paste,
polymerization aids, leathers, printing ink and paper making etc.l also used in
petroleum drilling and daily-use chemicals
Hydroxypropyl methyl cellulose is a thickener for aqueous and non-aqueous systems, clear films with grease resistance, binders,
lubricants, steric stabilizer and water retention aid. Dissolves in water, undergoes reversible gelation upon heating, non-ionic, does
not complex with ionic species and is surface actuce and enzyme resistant. Solutions are pseudoplastic.
Application
l. used as adhesives, thickeners, water-binding agents, emulsifiers, film-forming reagents, dispersing agents and stabilizers in the pharmaceutical industry
2. used as adhesive and water-binding agents in building industry.
3. used as thickeners, dispersing agents and stabilizers in paint, printing and ink industry.
4. used in plastic industry for forming release agents, softeners, lubricants and so on.
5. used in the leather and paper industries, fruit and vegetable fresh-maintaining and textile industry and so on.
Specifications
Items
|
HPMC
|
Methoxyl content (-OCH3) w/%
|
20.0-28.0
|
Hydroxypropyl content (-OCH2CHOOHCH3),w/%
|
5.0-11.0
|
Gelling temperature(°C)
|
55-80
|
Moisture content, w/%
|
MAX 1%
|
Residue on ignition, w/%
|
MAX 1.5%
|
Lead(Pb), ppm
|
MAX 2
|
Arsenic (As), ppm
|
MAX 2
|
Heavy metal
|
MAX 20
|
Viscosity (mpa.s)
|
5-200000
|
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