$42.50 – $310.00
All Chemical Defoamer or Antifoam is a low viscosity product which facilitates the rapid spread of our Defoamer on foamy surfaces. It has affinity to the air-liquid surface interface where it destabilizes the foam surface tension. Silicone-based defoamers are polymers with silicone backbones. These are delivered as an oil or a water based emulsion.
The silicone compound consists of an hydrophobic silica dispersed in a silicone oil. The active ingredient of the antifoams is a silicone based polymer that has a molecular weight range of 3,200 to 16,500 Da. The silicone-type antifoams are suspensions and must be agitated before a sample is taken from the container to ensure representative sampling. Long-term storage of diluted material may diminish this antimicrobial effect and additional preservative may be required. Silicone based defoamers are also suitable in non-aqueous foaming systems like crude oil and oil refining...
For very demanding applications fluoro-silicones may be suitable. Silicone antifoams, which have lower surface tension as compared to organic antifoams, are effective typically at much lower dosage rates than organics, leading to significantly lower cost-in-use. Silicone antifoams tend to be much more persistent (longer-lasting) than organic antifoams. Silicone antifoams, insoluble in most systems, tend to be less reactive in the foaming medium, leading to fewer compatibility problems.