CASE NO: 565
| MATERIAL: |
Solder resistant coating for circuit board. Consists of acrylic resin, green pigment, 5% by weight Cab-o-sil and acetone. Product 35,000 cps. |
|
PROBLEM: |
Disperse Cab-o-sil and pigment into resin-solvent mixture. Desire smooth coating. |
|
RESULTS: |
Produced smooth dispersion. |
|
AB MIXER: |
Model 3 x 1.5 toothed impeller/liner, 7.5 HP, 3600 RPM, full open grid. Recirculating to agitated tank. |
EQUIPMENT
REPLACED: |
Cowles type dispersion. |
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