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Technical Requirement
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Pre-gelation
1. BT serie additive pregel formulation
| Type | Polarity | Dispersion conditions | Adding method |
|---|---|---|---|
| BT-818 BT-838 |
10 | xylene: 87 | ethanol(95/5): 3 |
| BT-838A BT-838D |
5-8 | xylene 92-88 or 200# gasoline | ethanol/methanol(95/5): 3-4 |
| BT-838C BT-827 |
10 | xylene: 87 | ethanol(95/5): 3 |
| BT-838F BT-800 |
5-7 | xylene 92-89 or 200# gasoline | ethanol/methanol(95/5): 3-4 |
| BT-838S BT-840 BT-857 BT-860 BT-880 |
10 | xylene: 90 | needn't polar activator |
Pregel preparation:
| Pregel preparation procedure | Preparation Process |
|---|---|
| A. Add 87% of solvent or mixed solvent | Mix |
| B. Add 10% of BT series organobentonite, disperse 10 minutes at high speed (3000rpm) | Disperse 10 minutes at high speed (3000rpm) to become fluent material |
| C. Add 3% of polar activator | Disperse 10-15 minutes at high speed (3000rpm) to become highly sticky gel |
2. Add BT pregel
A. For non-wettable resin (epoxy, polyester, polyacrylate, etc.), use in combination with surfactant, addtion sequence is as follows:
1. Lacquer or solvent, mix
2. BT organic pregel (mix)
3. Surfactant
4. Pigment (disperse)
5. Dilute
B. For non-wettable resin and non-thixotropic pigment, addtion sequence is as follows:
1. Lacquer and solvent
2. Surfactant (if adopted) mix
3. Pigment
4. Disperse to needed fineness (disperse while grinding)
5. BT organic gel
6. Completedly disperse to desired fineness
7. Dilute
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