For defoamer compounders and their customers in coatings, paper, textile, construction chemicals and water treatment. Through hydrophobic and high-absorption silica routes we support powdering of liquid defoamers, stability of oil-based systems and screening of powder defoamer formats.
Grades our customers usually benchmark against: Evonik SIPERNAT® D10, SIPERNAT® D17 and ZEOFREE® hydrophobic / carrier silicas, Wacker HDK® hydrophobic fumed silica, and Cabot CAB-O-SIL® hydrophobic fumed silica.
Our route is not a brand-premium play: we start where the production problem is, run profile-matched screening, and earn the slot as a qualified second source — one validated sample at a time.
Three grades are put forward for this track. We do not publish typical-value tables here: the controlled TDS, COA and SDS for each grade are sent with the sample so that your evaluation runs on the document that will govern supply, not on brochure figures.
| Grade | Material | Where it sits in the screening |
|---|---|---|
| CENSIL 17 | Hydrophobic silica | The hydrophobic, anti-caking route for oil-based defoamer systems. Compatibility with mineral oil, silicone oil, polyether and waterborne systems is confirmed case by case. |
| CENSIL 698 | High-absorption silica powder | High-absorption candidate for liquid powdering — taking a defoamer oil or liquid active onto a carrier that stays easy to handle. |
| CENSIL 688 | High-absorption silica powder | Companion high-absorption route, aimed at liquid powdering and powder-system stability. |
On data. Final performance, compliance and application fit follow the supplier's latest TDS, the lot COA and your own test results. Ask for the grade-specific document set before you commit a formulation or a trial protocol.
| Validation dimension | Signal to check | What it tells you |
|---|---|---|
| Knock-down speed | How fast foam is eliminated | Immediate defoaming power |
| Persistence | Foam regrowth over time | Sustained stability |
| Compatibility | Fit with resin, emulsion, oil or water phase | Separation, surface oil and cratering risk |
| Liquid powdering | Whether the powder still flows after absorption | Whether powdering is feasible |
| Storage and temperature | Settling, caking or loss of activity across temperatures | Product reliability |
“First establish whether the customer's system is mineral oil, silicone oil, polyether or waterborne — then decide between the hydrophobic route on CENSIL 17 and the high-absorption powdering route on CENSIL 698 / 688.”