| 配方类型： |
MISCELLANEOUS |
| 配方说明： |
Antifoam Solution |
| 配方组成： |
Xylol/90.0
"Antifoam" A Compound/10.0 |
| 配制方法： |
Mix well, Before using-It is adviseable to shake. The use of this 10% dispersion has the advantage that workmen are less likely to use excessive amounts. In actual use-in Laboratory work one to t wo drops from a medicine dropper will be found to be highly effective on lab cooks (resin esterification reactions) involving 2500 g.
In Factory Size Cooks-500 Gal Kettles-5 c.c. (one teaspoonful) will break the foam that starts forming at about 375'F on the initial up-heat.
Amounts in excess of 10 parts per million are to be avoided. Amounts over this can have disastrous surface effects, such as cratering, silking, floating, etc. of organic coatings. |
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