Technical specifications:
1) Methoxyl content: 28.0 - 30.0%
2) Hydroxypropoxyl content: 7.0 - 12.0%
3) Gelation temperature: 58.0 - 64.0°C
4) Loss or drying: ≤5.0%
5) Burnt residues: ≤1.0%
6) PH value (1% solution at 25°C): 4.0 - 8.0
7) Viscosity (2% solution at 20°C): 5 - 100,000mPa.s
Physical properties:
1) Appearance: HPMC is a white or light gray pellet or fibril power with
odorless and tasteless
2) Solubility: hardly dissolves in waterless ethanol, aether or acetone,
expands as to clear or slightly muddy colloid solution in cold water; it
can dissolve in some organic solvents or some water-organic components
3) Pellet: 100 screen passable rate is over 98.5%, 80 screen passable rate
is 100%
Dissolving process:
HPMC will agglomerate when directly added to water and then dissolve. In this way
it dissolves very slow and hard. Suggested methods as followers:
1) In hot water: add water in container to 1/3 or 2/3 of its content, heated
to over 80°C, because HPMC doesn't dissolve in hot water, it uniformly
disperses in hot water; add cool water or ice to the residual content, stir
and cool down the mixture
2) Powder combination: mix HPMC with identical volume of other powder,
disperses them sufficiently then add water to the mixture result HPMC
dissolves without agglomeration
3) Organic solvent wet: dispersed or wet with organic solvents, such as
ethanol, glycol or oil, then add water can cause HPMC completely dissolves
Applications:
HPMC is mainly used as dispersant in the production of PVC and as thickener, stabilizer, emulsifier, excipient, water retention agent, film-forming agent in petrochemical, building materials, agrochemical, ink, printing and dyeing of textile,
paper making and cosmetics.
Transportation and storage:
1) Keep dry where good ventilated
2) Do not wet and keep away from sunshine during transportation
Packing:
25kg/multi-paper bag or kraft paper bag
