Technical Specifications
| Property | Unit | Typical Value | Test Method |
|---|---|---|---|
| Appearance | Colorless clear liquid | Visual | |
| Density at 25 °C | kg/m³ | 800 | ASTM D4052 |
| Flash Point | °C | 90 | ASTM D93 |
| Recommended addition | ppm | 20–200 | — |
* Typical values from batch production. Batch-specific COA available on request.
Molecular Structure
Composition · silicone-free polymer defoamer
Non-silicone organic-polymer / high-molecular-weight defoamer compound (no silicone, no PDMS)
A silicone-free compound: oil-soluble organic polymers with controlled incompatibility that enter and rupture foam films, while staying gentle on surface tension — so the air-release value is not affected and there is no PDMS carryover.
What Is a Silicone-Free Compound Foam Inhibitor?
CheMost T9000 is a silicone-free compound foam inhibitor for lubricating oils, built by combining organic polymers and other high-molecular-weight materials with no silicone components of any kind. It controls foam, is added without dilution — just meter it in — and, importantly, the data sheet states it does not affect the oil’s air-release value. It is a colorless, clear liquid dosed at parts-per-million levels.
The reason a formulator reaches for a silicone-free defoamer is that foam control and air release are two different jobs. Foam is air trapped at the oil surface; air release (deaeration) is the escape of air entrained inside the oil. Silicone (PDMS) is the most efficient surface-foam breaker because it lowers the fluid’s surface tension strongly — but that same property can slow air release, and silicone can leave a carryover that is unwelcome wherever cleanliness downstream matters. T9000 takes the opposite route: a non-silicone organic-polymer compound that ruptures foam while staying gentle on surface tension, so — per the data sheet — the air-release value is not affected, and there is no PDMS to carry over.
Within the CheMost defoamer family, T9000 is the only fully silicone-free grade. The acrylate-based compound defoamers (T9100 / T9200) carry a trace of polydimethylsiloxane from manufacture, and the G1000 grade is neat silicone. T9000 is the choice when any silicone is unacceptable in the system.
How the Silicone-Free Defoamer Works
Enters and ruptures the foam film
The oil-soluble polymer compound migrates to the air–oil interface of a foam bubble, spreads in the stabilising film and displaces the surfactants holding it together, so the bubble collapses.
Gentle on surface tension
An organic-polymer defoamer has a far smaller effect on the oil’s surface tension than neat silicone. That is why foam can be controlled without affecting the air-release value — the property the data sheet calls out as unaffected.
No silicone, no carryover
With no PDMS in the formula there is nothing to carry over into the system or downstream operations — useful wherever even trace silicone would be a contamination concern.
Controlled solubility
A defoamer works through a controlled degree of incompatibility. The data sheet notes that excess can cause turbidity and recommends roughly 30 ppm or more in use — dose into the working window rather than overdosing.
Silicone-Free vs Trace-Silicone vs Silicone — Where T9000 Fits
CheMost offers all three defoamer routes. The table places T9000 against the trace-silicone compound and the neat silicone fluid so you can choose by what the system needs — total absence of silicone and untouched air release, versus raw surface-foam knockdown. All figures are taken from each grade’s own data sheet.
| Grade | Chemistry | Silicone | Dose | Best for |
|---|---|---|---|---|
| T9000 (this page) | Non-silicone organic polymers | None | 20–200 ppm (no dilution) | Systems where any silicone is unacceptable and the air-release value must be kept unaffected |
| Compound defoamer (T9100 / T9200) | Acrylate + trace silicone | Trace PDMS | 30–200 ppm (no dilution) | Foam control with low air-release impact; sulfonate-containing oils (T9200) |
| Silicone defoamer (G1000) | Polydimethylsiloxane (silicone) | Is silicone | 10–500 ppm (pre-dilute) | Maximum surface-foam knockdown |
How to choose. Pick T9000 when the specification rules out silicone entirely, or when protecting air release is the priority — typical in air-release-sensitive hydraulic, turbine and circulating oils, or where the fluid or its mist could reach downstream coating and finishing operations that silicone would contaminate. Step up to the trace-silicone compound (T9100 / T9200) or neat silicone (G1000) when raw foam knockdown matters more than the absence of silicone. The trade-off is honest: a silicone-free polymer defoamer is gentler on surface tension, so it is less aggressive at raw knockdown and is usually dosed a little higher.
Applications
CheMost T9000 is used as the silicone-free foam-control component in formulations targeting the duties below:
Hydraulic & circulating oils
Air-release-sensitive hydraulic and circulating systems, where keeping the air-release value unaffected is the key advantage of the silicone-free route over a neat silicone fluid.
Turbine oils
Turbine and other long-life circulating oils, where both surface foam and entrained air must be managed and silicone carryover is best avoided.
Industrial & gear oils
Industrial and gear oils that need foam control without compromising air release, dosed straight in without a pre-dilution step.
Silicone-sensitive systems
Formulations where any silicone is unacceptable — for example where the fluid or its mist could contaminate downstream coating or finishing operations that silicone is known to disturb.
Finished-oil performance approvals belong to the fully formulated oil, not to an individual additive component.
Treat Rate
The data sheet gives an application window rather than a single fixed dose, so the guidance below is indicative — confirm the final level against a foam bench test such as ASTM D892, and, where deaeration is critical, against an air-release test such as ASTM D3427.
First-order estimate. The application range is 20–200 ppm, added without dilution; the data sheet recommends roughly 30 ppm or more as the lower working level. Antifoams are high-impact, low-treat components: dose to the lowest level that meets the foam target, since over-dosing any antifoam can ultimately make foam worse, and excess can cause turbidity.
The exact level depends on the base oil and the surface-active additives in the package — detergents and other surfactants stabilise foam and tend to call for more defoamer. Because no dilution is required, T9000 is simply metered into the blend.
Treat rates are indicative, not fixed dosages. CheMost can provide formulation and treat-rate support on request.
Formulating With a Silicone-Free Defoamer — Complementary Additives
Compound defoamer (T9100 / T9200)
Where a trace of silicone is acceptable and a little more knockdown is wanted, the acrylate compound is the neighbouring route — still low impact on air release, no dilution.
Silicone defoamer (G1000)
When raw surface-foam knockdown is the priority and silicone is allowed, the neat PDMS fluid is the most efficient option — but it must be pre-diluted and can slow air release.
Detergents & surfactants
Surface-active detergents and dispersants stabilise foam; T9000 is the foam-control partner that handles the foam those additives would otherwise hold, without adding silicone.
Hydraulic & industrial DI packages
T9000 sits alongside the antiwear, rust and oxidation additives as the foam-control component — chosen here specifically for keeping air release and the system silicone-free.
Documentation, Qualification & Regulatory Support
Standard documentation — Certificate of Analysis (COA, per shipment), Technical Data Sheet (TDS) and Safety Data Sheet (SDS, GHS/CLP) — is provided. The full TDS is available on request rather than as a public download. Additional support is available on request:
Regulatory documentation
REACH, TSCA and country-specific market-registration documentation support available on request.
Third-party inspection
SGS / Intertek / BV pre-shipment inspection can be arranged on request.
Custom grades & packaging
Custom grades and packaging on request.
Formulation support
Defoamer-selection and treat-rate guidance from our technical team.
Packaging & Supply
CheMost T9000 is stocked and shipped worldwide, with a typical lead time of 1–15 days and a 36-month shelf life at ambient temperature. Samples and quotations are answered within 12 hours.
Packaging
20 kg drum · 160 kg drum.
Minimum order
By drum — contact us for your quantity.
Incoterms
FOB · CIF · EXW, to suit your freight arrangement.
Storage
Dry, clean, well-ventilated store; max storage 50 °C, max blending 70 °C.
Frequently Asked Questions
What is a silicone-free compound foam inhibitor?
It is a defoamer for lubricating oils made from organic polymers and high-molecular-weight materials with no silicone components. CheMost T9000 controls foam, is added without dilution and, per its data sheet, does not affect the oil’s air-release value — because an organic-polymer defoamer is gentle on surface tension, unlike a silicone fluid.
How is it different from a silicone or trace-silicone defoamer?
The neat silicone (PDMS) defoamer G1000 gives the strongest surface-foam knockdown but lowers surface tension strongly, can slow air release and must be pre-diluted. The compound grades T9100 / T9200 are acrylate-based with a trace of PDMS. T9000 contains no silicone at all, so there is no carryover and air release is left untouched — at the cost of being somewhat less aggressive at raw foam knockdown.
Does it affect air release or need diluting?
No dilution — just add. The data sheet states T9000 does not affect the air-release value, which is the main reason to choose a silicone-free route in air-release-sensitive hydraulic, turbine and circulating oils.
What treat rate should I use?
The application range is 20–200 ppm, with around 30 ppm or more generally recommended. Dose to the lowest level that meets your foam target (e.g. ASTM D892), since over-dosing any antifoam can make foam worse and excess can cause turbidity. The exact level depends on the oil and its surface-active additives; our technical team can assist.
What are its basic properties and packaging?
T9000 is a colorless clear liquid with a density of 800 kg/m³ at 25 °C (ASTM D4052) and a flash point of 90 °C (ASTM D93). It is supplied in 20 kg and 160 kg drums with a 36-month shelf life at ambient temperature.