化學(xué)配方數(shù)據(jù)庫(kù)
| 配方類(lèi)型： |
MISCELLANEOUS |
| 配方說(shuō)明： |
Water-Repellency (Powders or Crystals) |
| 配方組成： |
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| 配制方法： |
L-31 Silicone Fluid, applied to many fillers, renders the filler extremely water repellent. A variety of materials such as sodium and potassium bicarbonates and zinc oxide have been treated. Water repellency is observed at a loading of about 1% L-31 silicone fluid (based on filler). the silicone fluid can be added directly to the dry filler and tumbled for a sufficient time to ensure thorough dispersion.
In many cases it is not necessary to catalyze nor to heat set the silicone.
Alternatively, for application of a low concentration of L-31 silicone fluid (0.05-0.1%) to a filler, it may be better applied as a dilute emulsion, in which case post application of heat is necessary to remove water and to spur rapid development of water repellency.
Surface Treatment L-31 silicone fluid applied to non-absorbing surfaces renders them adhesive and non-wetting. metals, plastics, glass, etc. may be so treated. A typical application is the treatment of the inside of glass pipettes to produce a non-wetting s |
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