SILCOLAPSE 411BR is equally effective in aqueous and anhydrous media. It is easily dispersed provided a suitable thinner is used (see below).
Recommended concentrations and directions for use :
- SILCOLAPSE 411BR is normally used in concentrations of 1 to 100 mg per of medium to be defoamed. It can be used as supplied, but it is often preferable to predilute it to a concentration of between 1 and 10%. To do this, slowly add either 99 or 90 parts of the thinner used to 1 or 10 parts respectively of SILCOLAPSE 411BR
- Prediluting SILCOLAPSE 411BR: The product can be diluted either in some of the medium to be defoamed (1), or in one of the following thinners, which are all solvents of the silicone oil in the compound, and are soluble, or simply dispersible, in the medium to be defoamed.
a/ use in anhydrous media
The following thinners are recommended:
aliphatic hydrocarbons (hexane, heptane, white spirit, etc.)aromatic hydrocarbons (benzene, totuene, xylene, naphtha solvent, etc.).chlorinated hydrocarbons (tri-chlorethylene, perchlorethylene, carbon tetrachloride, etc.)
b/ use in aqueous media
In this case, water-soluble or water-dispersable thinners should be used, such as:
certain ketones, e.g. methylethylketone or methylisobutylketone, certain alcohols, e.g. tertiobutanol, dodecanol-1 or ethyl-2 hexanolcertain ethers, e.g. ethyl ether or isopropyl ether.
Methanol, isopropanol, ethylene glycol, propylene glycol, glycerine, etc. are NOT RECOMMENDED for diluting SILCOLAPSE 411 BR as they are not solvents of the silicone oil in the compound.
(1) In the case of an aqueous medium, a master dispersion of SILCOLAPSE 411BR can be prepared. The homogeneity and lenght of stability of such a dispersion will depend on the degree of agitation, and also on the surfactant and rheological characteristics of the medium concerned.
Prior dilution tests are recommended in all cases before any operations on an industrial scale.
The colloidal filler in the compound may result in cloudy or clear dilutions, depending on the refractive of the thinner.
Use of pre-dilutions:
Examples of final concentrations of antifoam in the medium:
1 mg/kg dilute either 1 part of 1% predilution in 10 000 parts of the medium to be defoamed, or 1 part of 10 % predilution in 100 000 parts.100 mg/kg - dilute either 1 part of 1 % predilution in 100 parts of the medium to be defoamed, or 1 part of 10% predilution in 1 000 parts.
Users should make systematic tests to determine the optimum concentration of SILCOLAPSE 411BR, which generally depends on a number of factors - composition of the medium, temperature, pH and intensity of agitation. We recommend starting a dose of 10 mg of antifoam per kg of medium to be defoamed, and then increasing or decreasing this amount according to results.
|SILCOLAPSE 411 BR may be stored for up to 18 months from its date of manufacturing.||Please consult the Safety Data Sheet of this product.|
SILCOLAPSE 411 BR
SILCOLAPSE 411 BR is a silicone antifoam compound . It is intended mainly for treating anhydrous media, but also aqueous media.
Easy to use and disperse ,effective at low dosage , chemically inert.
SILCOLAPSE 411 BR is used in numerous industries: Agrochemicals, chemicals, fermentation process, paint & varnish...).
Central and South America