Section
| HS Code | 104699 |
| Product Name | SILFOAM SE 3060 |
| Product Type | 20% Active High-Solid Silicone Antifoam Emulsion |
| Food Grade Classification | Food Grade |
| Active Silicone Content | 20% |
| Physical Form | Aqueous Emulsion |
| Appearance | Milky White Homogeneous Liquid |
| Color | White |
| Emulsion Ionic Character | Non-Ionic |
| Ph At 25 C | Approximately 7.0 |
| Specific Gravity At 25 C | Approximately 1.0 |
| Viscosity At 25 C | 1000 - 5000 mPa·s (Brookfield) |
| Water Dispersibility | Readily Dispersible in Water |
| Shelf Life | 12 Months from Date of Manufacture |
| Storage Temperature | 5°C to 35°C |
As an accredited SILFOAM SE 3060 20% Active High-Solid Silicone Antifoam Emulsion–Food Grade factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied in 200 kg and 25 kg HDPE containers; sealed packaging preserves purity, stability, and food-grade safety of the silicone antifoam emulsion. |
| Container Loading (20′ FCL) | 20′ FCL container loading of SILFOAM SE 3060 food-grade antifoam emulsion, 20% active high-solid silicone, safely packed and secured. |
| Shipping | SILFOAM SE 3060 is a food-grade silicone antifoam emulsion supplied as a 20% active high-solid liquid. It is non-hazardous for transport under normal conditions, though packaging must prevent leakage. Ship at ambient temperature, avoid freezing, and keep containers sealed and upright to maintain stability. |
| Storage | Store SILFOAM SE 3060 in its original, tightly sealed container in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and incompatible materials. Avoid freezing and temperatures above 40°C (104°F). Keep container clean and uncontaminated when dispensing. Ensure adequate ventilation and follow food-grade handling practices to preserve product stability and performance. |
| Shelf Life | Shelf life is 24 months from manufacture if stored in original unopened containers, protected from freezing and extreme heat. |
In countercurrent beet cossette diffusion trains operating at 68–74°C and pH 5.5–6.0, soluble pectin and denatured beet saponin fractions create a persistent froth that reduces screening efficiency on wedge-wire raw juice screens, causes false density readings in mass-flow meters controlling milk-of-lime addition, and carries sugar entrainment into multi-effect evaporation calandria. SILFOAM SE 3060, a 20% active high-solid silicone antifoam emulsion, is metered into the diffuser fresh-water manifold or raw juice collection trough at 15–80 mg/kg fresh cossette mass, equivalent to 3–16 mg/kg active polydimethylsiloxane. The lower boundary is applied when diffusion water carryover is below 20% and pectin methoxy content is under 0.4%; the upper boundary is reserved for high-pulp campaigns where raw juice surface tension measured by Du Noüy tensiometer falls below 45 mN/m. Injection must be preceded by dilution at 1:10 with tempered process water because direct contact with cold raw juice below 4°C can induce localized emulsion inversion. Regulatory status is anchored to FDA 21 CFR 173.340 as a food processing defoamer; in the European Union, residual dimethylpolysiloxane, INS 900a, must satisfy either processing-aid exclusion under Regulation (EC) No 1333/2008 or the Annex II category limits for E 900 if regarded as a food additive. Downstream, thin juice proceeds through main liming, two-stage carbonation, filtration, and multi-effect falling-film evaporation at vapor temperatures from 55°C to 125°C. Foam carryover into the fourth effect inlet raises pressure differential across the calandria and lowers heat transfer; a secondary dose of 5–15 mg/kg thin juice is therefore introduced when vacuum pan boiling shows false grain counts or crystallizer level instability. Terminal product types include white granulated sugar, thick juice, molasses, and dried pressed beet pulp.
Submerged citric acid fermentation with Aspergillus niger on glucose or sucrose syrups generates foaming from extracellular proteins, organic acids, and air-sparged mycelial fragments. In 200 m³ stainless-steel stirred-tank bioreactors agitated at 150–280 rpm with Rushton impellers and aerated at 0.8–1.5 vvm under 0.3–0.8 bar(g) backpressure, a conductive foam probe triggers antifoam injection when foam height exceeds 25% of working liquid level. SILFOAM SE 3060 is added as a sterile 1:10 dilution in deionized water through a peristaltic injection line into the vortex zone at cumulative rates of 0.01–0.05% v/v initial batch volume. The lower cumulative rate is sufficient for high-glucose feed lots with low extracellular protein; the upper boundary is required when broth viscosity measured by Brookfield spindle at 25°C and pH 2.2 exceeds 1,200 mPa·s. Addition above 0.08% v/v may suppress the oxygen transfer coefficient kLa in high-solids mycelial broths because excess silicone concentrates at the gas–liquid interface; the antifoam is therefore split into 0.005% v/v sequential pulses interlocked with foam height. The emulsion should not be mixed with strong cationic broth flocculants such as quaternary polyamine clarifiers before injection, because charge interaction can destabilize the silicone emulsion and reduce foam knockdown. Compliance references include FDA 21 CFR 173.340 for processing-aid defoaming; in the EU, use falls under Regulation (EC) No 1333/2008 processing-aid provisions, and final citric acid must conform to FCC or USP monographs when sold as a food acidulant. Downstream processing includes rotary vacuum precoat filtration on diatomaceous earth, cation and anion exchange polishing, vacuum evaporation, and continuous crystallization at 60–70°C. Terminal product types include citric acid monohydrate, anhydrous citric acid, trisodium citrate dihydrate, and spray-dried yeast autolysate from the spent biomass stream. Published data for this specific configuration with SILFOAM SE 3060 is limited; the cited setpoints are production-line values for silicone antifoams of similar active content and should be revalidated using a 500 mL graduated cylinder shake test at 80°C.
Citrus pulp wash liquor recovered from finisher and decanter stages carries residual peel oil, hesperidin microcrystals, and pectin oligomers; when this liquor is concentrated in falling-film evaporators at 60–68°C under 180–250 mbar absolute, the peel oil lowers interfacial tension and pectin increases bulk viscosity, producing a tenacious froth that plugs entrainment separators and raises condenser distillate chemical oxygen demand. SILFOAM SE 3060 is metered into the pulp wash feed tank at 10–50 mg/L of feed liquor, equivalent to 2–10 mg/L active silicone. The lower setpoint is selected for depectinized serum with pectin below 0.1 g/L; the upper setpoint is required for whole pulp wash liquor with hesperidin above 1.5 g/L and d-limonene above 500 mg/kg. The emulsion is diluted 1:5 with warm condensate before injection into the suction side of the evaporator feed pump to prevent localized oiling and wetting defects on finisher screens. Direct undiluted contact with concentrated d-limonene streams above 50°C should be avoided because the emulsion may invert in a high oil phase. Use as a process antifoam falls under FDA 21 CFR 173.340; for EU and Codex markets, residual dimethylpolysiloxane is assessed under Regulation (EC) No 1333/2008 Annex II and Codex STAN 192-1995, with processing-aid exclusion applying when the final concentrated juice falls within assigned E 900 category limits. The downstream sequence includes enzyme-assisted pectin degradation at 45–55°C, pasteurization by plate heat exchanger at 95–98°C for 15–30 s, and aromatic recovery by continuous distillation at 0.2–0.4 bar. Terminal product types include not-from-concentrate orange juice, concentrated orange juice, pulp wash concentrate, citrus molasses, and d-limonene distillate.
In soluble coffee manufacture, roasted ground coffee is extracted in battery extractors at 140–180°C and 10–20 bar; the extract contains melanoidins, denatured proteins, polysaccharides, and dissolved carbon dioxide. When pressure is released through flash coolers to 70–80°C, gas breakout creates a low-density foam that destabilizes level control in vacuum pans and reduces heat transfer in falling-film preconcentrators. SILFOAM SE 3060 is dosed into the extract flash tank at 5–30 mg/kg dry matter extract, equivalent to 1–6 mg/kg active silicone. The dose is trimmed against total solids measured by refractometer; extracts above 18°Bx and foam persistence exceeding 120 s in a heated 500 mL cylinder test require the upper boundary. The emulsion is injected as a 1:20 dilution in condensate through a needle dosing valve upstream of the vacuum pan. Regulatory compliance is grounded in FDA 21 CFR 173.340; in EU-marketed final product, residual dimethylpolysiloxane must be consistent with Regulation (EC) No 1333/2008 Annex II. ISO 3509:2005 may apply to soluble coffee product classification, although it does not govern antifoam residue. Downstream processes include vacuum evaporation to 55–70% total solids, aroma recovery with packed-column distillation, and spray drying at inlet 180–220°C and outlet 80–110°C. Terminal product types include spray-dried soluble coffee, agglomerated instant coffee, freeze-dried coffee, and liquid coffee concentrate for vending systems.
Rotary drum water blanchers processing peas, green beans, and diced carrots at 88–95°C release starch from cut surfaces and legume saponins that stabilize a foam cap carrying fine solids into overflow screens and disrupting hydrostatic sterilizer water balance. SILFOAM SE 3060 is metered continuously into the blanch water makeup line at 2–10 mg/kg blanch water; the rate is controlled by a foam-height sensor on the drum discharge weir, with the upper boundary reserved for pea lines where blanch water starch exceeds 1.5 g/L. Dilution at 1:20 with recovered blanch water is performed before dosing to prevent emulsion coagulation on hot surfaces. The application is covered by FDA 21 CFR 173.340 as a food processing defoamer; EU compliance is managed under Regulation (EC) No 1333/2008 processing-aid provisions, with final vegetable packs tested against Codex STAN 192-1995 for permitted food additive residues. The blanched product proceeds through hydrostatic sterilization at 121°C for 10–20 min depending on container size. Terminal product types include canned peas in brine, canned cut green beans, canned diced carrots, and mixed vegetable cans.
In potato starch extraction, disintegrated potato tissue is separated in decanter centrifuges and nozzle separators where the soluble protein fraction, coagulated at 35–40°C, forms a froth that overflows the protein recovery line and reduces starch yield from hydrocyclones. SILFOAM SE 3060 is added to the protein process water circuit at 10–30 mg/L process water, corresponding to 2–6 mg/L active silicone. Dosing is continuous through a side-stream dilution skid using 1:10 dilution in fresh process water to avoid emulsion disruption by high shear and to prevent oily film deposition on nozzle separator discs. Compliance follows FDA 21 CFR 173.340; for EU and Codex destinations, the final starch is evaluated under Regulation (EC) No 1333/2008 Annex II and Codex STAN 192-1995 for dimethylpolysiloxane limits. The downstream process includes fiber screening on conical rotary extractors, multiple hydrocyclone countercurrent washing, vacuum filtration, and flash drying at inlet 160–180°C. Terminal product types include native potato starch, potato protein concentrate, potato fiber, and clarified protein liquor for animal nutrition.
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Foam in aqueous food-processing streams is stabilized by soluble proteins, pectins, saponins, polysaccharides and fermentation metabolites, and its collapse is required to maintain heat-transfer rates, pump suction pressure, fill accuracy and vessel working volume. SILFOAM SE 3060 is a 20% active high-solid silicone antifoam emulsion formulated for food-grade foam control. The active phase is a polydimethylsiloxane fluid dispersed as an oil-in-water emulsion with a nonionic emulsifier system; the remaining continuous phase is water. The 20 wt% active content defines it as a concentrate relative to conventional 10 wt% food-grade silicone emulsions, while the high-solids design reduces shipped and stored water mass per unit of active silicone.
The supplied material is a white to off-white pourable liquid with a specific gravity near 1.0 at 20 °C, pH in the range 6–8, and viscosity specified by batch release testing. The product is freeze-sensitive and should be stored between 2 °C and 40 °C in closed containers. Mechanical redispersion is required if separation occurs after prolonged storage. Dilution should be made with cold or ambient process water, not steam or water above 40 °C, to avoid destabilizing the emulsion before it reaches foam surfaces. Rotational viscometry according to ISO 2555 at 25 °C is commonly used for batch release, and pH measurement is conducted with a calibrated glass electrode according to ISO 10523.
The high disperse-phase volume fraction influences two operational variables. First, the emulsion must be diluted before it is introduced into high-shear equipment. When undiluted high-solids emulsion is injected at the suction of a centrifugal pump or through a narrow positive-displacement metering head, the shear field can rupture the primary droplets and release partially coalesced silicone phase onto impeller surfaces. The resulting coating reduces heat transfer and may cause slugging of antifoam in downstream piping. A pre-dilution to 1–5 wt% active silicone in ambient water is commonly used to produce a stable secondary emulsion that feeds smoothly through diaphragm metering pumps and in-line static mixers.
Second, dose-response is process-specific. Laboratory aeration test cells with sintered-glass spargers and foam-height recorders are used to determine the minimum active silicone concentration required for a given broth, wash water or slurry. Documented evaluations for medium-intensity aqueous foam commonly fall between 10 mg/kg and 100 mg/kg active silicone, but fermentation systems with high protein loads may require upward adjustment. Published data for this specific configuration is limited unless process-specific sparge trials are available. The diluted emulsion is typically effective only when droplets can reach the air–liquid interface before being sheared to excessively fine sizes, because a population of droplets with sufficient hydrophobic surface area must remain available to spread across foam lamellae.
The mechanism of action follows the entering and spreading behaviour of hydrophobic polydimethylsiloxane droplets at the gas–liquid interface. A droplet must enter the foam film and spread to destabilize the lamella; therefore the particle size distribution after dilution is an important quality attribute. In high-solids emulsions, the emulsifier loading and disperse-phase volume fraction influence the rate at which droplets adsorb onto foam film surfaces. For this reason, high-shear dispersion should be avoided before the product has been diluted to the concentration intended for metering.
In starch slurry defoaming trials on side-entry agitated tanks, surface addition of the concentrated emulsion was observed to produce localized foam collapse at the point of addition while foam persisted at the opposite tank wall. Raising the dilution to 2 wt% active silicone and injecting through a dip pipe below the liquid surface produced more uniform foam knockdown across the tank circumference. This type of addition is preferred in vessels with radial mixing patterns, because the diluted emulsion is drawn into the bulk phase before discrete droplets rise and spread at the air–liquid interface.
For fruit and vegetable washing flumes where saponins and pectic substances are extracted into recycled water, continuous dosing of a 1–3 wt% diluted stream at the pump discharge is more effective than batch dumping into the flume feed box. The recirculating water system requires regular blowdown to prevent accumulation of defoamed solids, because the antifoam does not remove the foam-stabilizing surface-active compounds but only destabilizes the foam lamellae. Hard water above 500 mg/L as CaCO₃ should be test-diluted before full-scale implementation because calcium and magnesium ions can alter emulsion redispersibility and droplet deposition behaviour.
The selection between SILFOAM SE 3060 and alternative silicone foam-control agents depends on delivery form, knockdown persistence, and regulatory compatibility. A 10 wt% dimethylpolysiloxane emulsion delivers half the active silicone per unit mass and therefore occupies twice the storage volume for an equivalent active dose. Silicone-polyether copolymers are often self-dispersing and may provide faster knockdown in cool aqueous surfactant solutions, but their foam-suppression persistence in repeated foam-generation cycles can be lower than that of a high-viscosity polydimethylsiloxane droplet because the polyether modification facilitates extraction into micelles and depletion from the air–liquid interface. The high-solids PDMS emulsion introduces no high-HLB surface-active component into the process stream.
| Parameter | SILFOAM SE 3060 class | 10% PDMS emulsion | Silicone-polyether |
|---|---|---|---|
| Active silicone concentration | 20 wt% | 10 wt% | Typically 100% active or diluted |
| Delivery form in water | Oil-in-water emulsion, dilution required before high shear | Oil-in-water emulsion, dilution required | Self-emulsifying or water-dispersible |
| Antifoam persistence under repeated foam cycles | High; residual droplet reservoir remains active | Moderate to high depending on particle size | Moderate; can be depleted by micellar extraction |
| Food-processing status | Formulated for food-grade use under FDA 21 CFR 173.340 where applicable | Similar PDMS chemistry, lower active content | Requires grade-specific verification for food processing |
In transportation and storage terms, replacing a 10 wt% emulsion with the 20 wt% high-solids grade reduces container count and warehouse floor area by roughly one half for the same active silicone inventory. The reduced water content also lowers the risk of microbiological growth and reduces preservative demand, but the concentrated emulsion may show more pronounced creaming and requires more thorough redispersion than a lower-solids product. Oil-miscible 100% active dimethylpolysiloxane fluids are difficult to meter into aqueous process streams without solvent or heated lines, and they do not spontaneously disperse in cold water; this makes the water-dilutable high-solids emulsion more practical in lines where dilution at the point of use is possible.
Foam control in aerobic fermentation is not achieved by a single universal dose. Protein-rich yeast or bacterial broths generate foam that is stabilized by cell debris, denatured proteins and exopolysaccharides. In such systems, the emulsion is normally pre-diluted to below 5 wt% active silicone and dosed continuously through a side stream. Aeration rate, agitation power input and pH are recorded during dose-response trials, because antifoam performance shifts with protein hydrophobicity and viscosity. If the fermentation is oxygen-limited, excessive antifoam dosing can reduce the volumetric oxygen transfer coefficient, kLa, by spreading over the gas–liquid interface; the minimum effective dose is therefore preferred and must be established by kLa measurement or off-gas analysis.
In sugar beet extraction, pectin and protein in raw juice stabilize foam in carbonatation and extraction tanks. The high-solids emulsion is dosed into the juice circulation line upstream of the tank. Because the product is a water-dilutable emulsion, its use in filtration processes downstream of the dosing point requires attention to silicone carryover. Continuous dosing of a diluted stream is preferred over batch injection of undiluted product, because batch injection can create short-lived high local concentrations that deposit on filter cloths or tank walls. Process users typically set the addition rate by visual foam-height control or by conductivity-based foam detection, then adjust downward while maintaining the required vessel working volume.
The designation food-grade does not constitute a universal regulatory approval. In the United States, dimethylpolysiloxane as a defoaming agent is addressed in FDA 21 CFR 173.340; conformance must be verified against the specific finished-product conditions and the user's process carryover analysis. In the European Union, substances used as processing aids are excluded from the scope of food additives under Regulation (EC) No 1333/2008, but Member State requirements for processing aids continue to apply, and the manufacturer's documentation should be checked for food-contact suitability. For other jurisdictions, the user is responsible for confirming that the food-contact status is accepted under applicable national standards. The product is not intended as a direct food additive or as a final-ingredient emulsifier; residual carryover must be reduced to the lowest technically achievable level for the specific process.
Operational boundaries should be defined before installation. The emulsion must not be allowed to freeze, because freeze-thaw cycles break the emulsion and form a non-redispersible silicone gel. It should not be blended with concentrated electrolytes, strongly acidic cleaning solutions below pH 3, or strongly alkaline streams above pH 11 without prior emulsion stability testing. Avoid using undiluted product with high-shear rotor-stator mixers, gear pumps with tight clearances, or steam injectors. The product is water-based and is not suitable for anhydrous fat or oil formulations, where an oil-miscible dimethylpolysiloxane or a 100% active compound may be more compatible.
