For Investment casting
It can be used to speed up the drying rate and shorten making period of the shell in colloidal silica coating.
Main technical standards:
|
Item |
FSⅠ |
FSⅡ |
FSⅢ |
|
|
Appearance |
Slightly milky liquid |
Milky liquid |
||
|
Solid (wt)% |
30.0～31.5 |
32.0～34.0 |
32.0～34.0 |
|
|
density（20℃,g/cm3） |
1.20～1.22 |
1.18～1.20 |
1.18～1.20 |
|
|
Na2O（wt）% |
≤0.2 |
≤0.5 |
≤0.2 |
|
|
pH（20℃） |
8.0～9.5 |
9.0～10.5 |
8.0～9.5 |
|
|
Viscosity（20℃,C.P） |
≤15 |
≤15 |
≤20 |
|
|
Particle size（nm） |
8～15 |
8～15 |
8～15 |
|
|
Strength for high temp |
Similar to GS-30 |
|||
|
Wet strength for normal temp |
Similar to GS-30 |
Higher than GS-30 |
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|
Residue when quaking shell |
Similar to GS-30 |
Much less than GS-30 |
||
|
Drying time between the layer |
Can be saved by half |
Can be saved 2/3 |
||
|
Stability |
1 year |
6 months |
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Remarks:
1、The using way is same with common colloidal silica.
2、The life of slurry, the capability of coating and the high-temp strength are similar with common colloidal silica.
3. The shell should be uniform by wind in drying process.
4、Please park 24 hours before dewaxing.
5、It can replace ethyl orthosilicate, and its high-temp strength is higher.
6、It can replace the mixer of colloidal silica and latex.
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Last： For Catalyst
Next： For water-paint