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| Cellulose ether for construction use |
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 Cellulose ether for construction use-Methylcellulose (MC) |
| Composition and chemi1cal structure |
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| Technical index |
Quality Standard: Q/79339844-1.01-2008
Index name |
Model |
KH55 |
Methoxy (WT%) |
27.0-32.0 |
Gelling temperature (℃) |
50.0-55.0 |
Loss on drying (WT%) |
≤5.0 |
Residue on ignition (WT%) |
≤1.0 |
PH Value(1% Water Solution,25℃) |
5.0-7.5 |
Viscosity Standard:
NDJ-1 2% solution 20℃ |
B B type Viscosimeter 2% solution 20℃ |
Nominal Viscosity(mPa.s) |
Range |
Nominal Viscosity(mPa.s) |
Range |
5 |
3-9 |
15000 |
13000-17000 |
| 15 |
10-20 |
20000 |
18000-22000 |
| 25 |
20-30 |
30000 |
23000-34000 |
| 50 |
40-60 |
40000 |
35000-45000 |
| 100 |
80-120 |
50000 |
46000-55000 |
| 400 |
300-500 |
60000 |
56000-64000 |
| 800 |
700-900 |
75000 |
65000-85000 |
| 1500 |
1200-2000 |
80000 |
75000-85000 |
| 4000 |
3500-4500 |
10万 |
85000-130000 |
| 8000 |
7000-9000 |
150000 |
130000-180000 |
| 10000 |
9000-11000 |
200000 |
180000 or more |
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| Properties: |
1, Appearance: MC is white or light gray pellet or fibril power with odorless.
2, Properties: MC is almost insoluble in ethanol, ether and acetone; quickly dispersed in 80-90℃ water; aqueous solution is very stable in room temperature; has good wetting/dispersing/adheisve/thickening/emlusifying/water preserving/film-forming properties; can prevent the infilration of grease; film formed has excellent flexibility and trransparency; has good compatibility with other emulsifier; easy salting-out. its solution is stable with PH 2－12.
3, Apparent density: 0.30－0.70g/cm3, density is 1.3g/cm3. |
| Dissolving process |
MC 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.
MC does not dissolve in hot water. The primary HPMC can be uniformly disperse in hot water. Then cool down in two ways:
a) Add hot water in container and heated to over 70℃. Add MC gradually while slowly, stir. At the beginning, MC float on the top of water, then turns into slurry state stir and cool down.
b) Add water in container to 1/3 or 2/3 of its content. Heated to over 70℃ add MC by sequence of a). Make it disperse to form slurry state. Add cool water or ice to the resideual content, stir and cool down the mixture.
2. Powder combination.
Mix MC with identical volume of other powder, disperses them sufficiently then add water to the mixture result MC dissolves without agglomeration.
3.Organic solvent wet.
Dispersed or wet with orgnic solvents such as ethanol, glycol or oil, then add water can cause MC completely dissolves. |
| Application |
Chemical ingredient MC is widely used as thickener, protective glue, auxiliary emulsification agent, coloring matter, adhesive of tablets or coating forming agent. Oral defecation agent as well as bases collutory and eye drop agent. Main raw materials of Oral defecation agent and eye drop agent. Also, it can be used as framework material. MC can be made to hydrophilic sol framework. Micro hole film coating or multi layer coating film it controlled released matrix agent. MC with low viscosity is ususlly used as emulsification agent of water packed oil emulsion while MC with high viscosity can be used as thickener, adhesive agent suspending agent and tablets agglutinate. MC can also be mixed with HPMC as film coating of tablets |
| Packing, transport and storage |
Packed in 25kgs complex paper bag inner with PE bag, bags are wrapped tightly in pallets. Stored indoors in dry and draughty place, avoid rain and sunlight during transporting. |
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