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Nonsilicone Defoamers are foam-control agents formulated without silicone-based active materials such as polydimethylsiloxane.
Nonsilicone Defoamers rapidly destroy existing foam, suppress new foam formation, or provide both effects during manufacturing and processing.
Nonsilicone Defoamers are used when effective foam control must be combined with surface compatibility, coating quality, cleanability, repulpability, filtration performance, or silicone-free production requirements.
CHEMICAL IDENTITY AND COMMON NAMES
CAS Number: No single CAS number applies to this product category
EC Number: No single EC number applies to this product category
Molecular Formula: Determined by the selected carrier, active components, emulsifiers, and hydrophobic particles
Molecular Weight: Determined by the chemical composition of the selected grade
Synonyms
Non-silicone defoamers, silicone-free defoamers, nonsilicone antifoams, non-silicone antifoams, silicone-free antifoams, non-silicone foam-control agents, silicone-free foam-control agents, non-silicone foam suppressants, silicone-free foam suppressants, non-silicone foam breakers, silicone-free foam breakers, mineral-oil defoamers, hydrocarbon-based defoamers, oil-based defoamers, water-based defoamers, polyether defoamers, fatty-alcohol defoamers, ester-based defoamers, vegetable-oil defoamers, wax-based defoamers, powder defoamers, silicone-free deaerators
PRODUCT CATEGORY
Nonsilicone Defoamers form a broad category rather than a single chemical substance.
Commercial products can contain hydrocarbon oils, vegetable oils, fatty alcohols, fatty acid derivatives, esters, waxes, hydrophobic particles, ethylene oxide and propylene oxide copolymers, emulsifiers, dispersants, or combinations of these materials.
The term nonsilicone identifies the absence of silicone-based defoaming actives.
It does not establish a single composition, hazard classification, physical form, or regulatory status.
DEFOAMING MECHANISM
Foam consists of gas bubbles separated by thin liquid films stabilized by surfactants, proteins, polymers, fine particles, or other surface-active substances.
A stable foam film resists liquid drainage and prevents adjacent bubbles from combining.
Nonsilicone Defoamers are designed to enter the foam film, spread across the interface, and disturb the stabilizing structure.
This action accelerates film drainage, causes local thinning, and promotes bubble rupture.
Hydrophobic droplets and particles can create weak points in the foam lamella.
When their entry and spreading characteristics are correctly balanced, they destabilize the film without becoming completely dissolved in the foaming medium.
Controlled incompatibility is essential to defoamer performance.
A material that is too compatible with the process liquid can behave like an ordinary surfactant, while a material that is too incompatible can separate, deposit, or disperse poorly.
ANTIFOAM AND DEFOAMER FUNCTIONS
A defoamer primarily destroys foam that has already formed.
An antifoam primarily prevents or limits foam formation before the foam becomes established.
Many Nonsilicone Defoamers provide both rapid foam knockdown and continuing foam suppression.
The relative balance between these functions depends on carrier chemistry, active-particle structure, droplet size, dispersibility, temperature, and process conditions.
Rapid knockdown is important during vessel filling, mixing, pumping, coating, and emergency foam control.
Persistent suppression is important in continuous processes, recirculating systems, biological treatment, fermentation, washing, and high-shear production.
COMMERCIAL CHEMISTRY TYPES
Mineral-oil-based defoamers
Mineral-oil-based products commonly use refined paraffinic or naphthenic oils as carriers.
The carrier distributes hydrophobic waxes, fatty derivatives, metal soaps, or hydrophobic particles throughout the foaming medium.
These grades provide economical and effective foam control in water treatment, pulp and paper, paints, coatings, adhesives, construction materials, and general industrial processing.
Oil quality, aromatic content, viscosity, flash point, and compatibility influence application performance.
Vegetable-oil-based defoamers
Vegetable-oil-based products use plant-derived oils or modified natural-oil derivatives as carriers or active components.
They are selected for renewable-feedstock objectives, mineral-oil-free formulations, and processes requiring compatibility with natural-origin ingredients.
Vegetable-oil composition influences oxidation stability, low-temperature behaviour, odour, colour, and interaction with process materials.
Antioxidant systems and controlled storage conditions support consistent product quality.
Polyether defoamers
Polyether defoamers are commonly based on ethylene oxide and propylene oxide copolymers, alkoxylated alcohols, or related polyether structures.
Their molecular architecture controls water solubility, cloud point, foam suppression, temperature response, and compatibility with aqueous systems.
Polypropylene oxide-rich structures generally provide stronger hydrophobicity and low-foam behaviour.
Ethylene oxide content increases hydrophilicity and dispersibility.
Block sequence, molecular weight, and end-group chemistry are used to balance initial knockdown with long-term foam control.
Fatty-alcohol defoamers
Fatty-alcohol defoamers use long-chain alcohols, fatty-alcohol dispersions, or blends containing waxy hydrophobic components.
They are widely used in water treatment, pulp processing, fermentation, food processing, textile operations, and industrial cleaning.
Fatty-alcohol chain length and melting behaviour influence activity temperature, persistence, and dispersibility.
These products can provide effective foam control with limited interference in downstream applications.
Ester-based defoamers
Ester-based products contain fatty acid esters, polyol esters, glyceride derivatives, or other hydrophobic ester structures.
They are used where mineral-oil-free, low-odour, or application-specific compatibility is required.
Ester polarity affects spreading, emulsification, deposit tendency, and performance in systems containing surfactants, solvents, polymers, or natural oils.
Hydrolytic stability is an important selection factor in strongly acidic or alkaline processes.
Wax-based defoamers
Wax-based products contain paraffin waxes, synthetic waxes, fatty waxes, or wax dispersions.
The wax phase creates hydrophobic structures that destabilize foam films and support persistent antifoam performance.
Particle size, melting range, dispersion quality, and operating temperature determine effectiveness.
Wax grades are frequently combined with oils, fatty derivatives, emulsifiers, or hydrophobic particles.
Water-based defoamers
Water-based Nonsilicone Defoamers are emulsions or dispersions containing hydrophobic defoaming components in an aqueous continuous phase.
They provide convenient dilution, rapid distribution, reduced hydrocarbon content, and compatibility with many waterborne processes.
Emulsion stability and droplet-size distribution strongly influence performance.
Excessive pumping, freezing, overheating, or prolonged high shear can damage the emulsion structure.
Oil-free defoamers
Oil-free grades are formulated without conventional mineral-oil carriers.
They can be based on polyethers, fatty derivatives, wax dispersions, esters, or other specialty components.
Oil-free products are selected for processes where hydrocarbon residues, surface contamination, coating defects, downstream adhesion, or environmental requirements limit mineral-oil use.
Powder defoamers
Powder defoamers contain defoaming actives deposited or dispersed on mineral, starch, salt, or other solid carriers.
They are designed for dry blends, cementitious materials, powdered detergents, mortars, gypsum systems, and products that are reconstituted with water.
Carrier selection controls flowability, storage stability, dust generation, wetting, and release of the active defoamer.
Powder grades must distribute uniformly before or during hydration.
PHYSICAL AND CHEMICAL CHARACTERISTICS
Appearance: Liquids, viscous liquids, emulsions, dispersions, pastes, waxy materials, granules, or powders
Colour: White, off-white, cream, pale yellow, amber, or product-specific
Odour: Mild, characteristic, oily, or nearly odourless
Chemical Nature: Hydrocarbon-, polyether-, fatty-alcohol-, ester-, wax-, or vegetable-oil-based foam-control formulation
Silicone Content: Formulated without silicone-based defoaming actives
Ionic Character: Commonly nonionic or weakly ionic according to the emulsifier and dispersant system
Active Matter: Product-specific
Water Content: Product-specific
Solubility: Commonly insoluble, partially dispersible, emulsifiable, or self-dispersing in the process medium
Dispersibility: Determined by carrier chemistry, emulsifier system, particle size, and process conditions
Density: Product-specific
Viscosity: Product-specific and temperature-dependent
pH: Relevant to aqueous emulsions and dispersions
Flash Point: Relevant to hydrocarbon- and solvent-containing grades
Pour Point: Relevant to liquid oil-based grades
Freezing Stability: Relevant to aqueous emulsions and dispersions
Cloud Point: Relevant to polyether-based grades
Particle Size: A critical parameter for emulsions, dispersions, and powder products
Foam Knockdown: Rapid bubble collapse after product addition
Foam Suppression: Continued resistance to new foam formation
Deaeration Performance: Release of entrained or finely dispersed air from liquid systems
PERFORMANCE CHARACTERISTICS
Nonsilicone Defoamers provide foam control without introducing silicone-based active materials into the process.
They are particularly useful when silicone residues can interfere with coating, printing, adhesion, lamination, filtration, repulping, or subsequent surface treatment.
Rapid-spreading grades provide strong initial foam knockdown.
Persistent grades remain active through recirculation, agitation, pumping, temperature changes, and repeated introduction of foam-forming materials.
Selected products also improve deaeration by helping small entrained air bubbles combine and escape.
This function can reduce pinholes, craters, density errors, pumping irregularities, inaccurate filling, and loss of process capacity.
Nonsilicone Defoamers can be supplied with controlled compatibility for waterborne coatings, polymer dispersions, cleaning solutions, biological systems, mineral slurries, and industrial process liquors.
Correctly selected grades provide foam control without destabilizing the finished formulation.
APPLICATIONS AND INDUSTRIES
Pulp and paper production
Nonsilicone Defoamers control foam and entrained air during pulping, washing, screening, bleaching, stock preparation, paper-machine operation, coating, and wastewater treatment.
Effective air removal supports drainage, sheet formation, pump efficiency, production speed, and surface quality.
Nonsilicone Defoamers are valuable where silicone deposits, downstream coating problems, or repulpability requirements restrict silicone use.
Product selection considers temperature, alkalinity, fibre content, dissolved organic material, pitch, shear, and recirculation.
Water and wastewater treatment
Nonsilicone Defoamers suppress foam in aeration basins, equalization tanks, clarification systems, sludge treatment, membrane systems, and industrial effluent plants.
Foam control improves usable vessel volume, operator safety, visual monitoring, and process stability.
Biological treatment requires a defoamer that controls surfactant- and biomass-generated foam without disrupting microbial activity.
Application performance depends on wastewater composition, aeration rate, temperature, sludge age, and treatment chemistry.
Paints and coatings
Nonsilicone Defoamers reduce macrofoam, microfoam, and entrained air during pigment dispersion, grinding, let-down, filling, application, and film formation.
They help prevent pinholes, craters, poor levelling, density variation, loss of gloss, and irregular film appearance.
Waterborne architectural coatings, industrial coatings, wood coatings, printing coatings, and pigment concentrates require a balance between defoaming power and compatibility.
An excessively incompatible defoamer can produce surface defects, while excessive compatibility can reduce foam-control efficiency.
Printing inks
Nonsilicone Defoamers control foam in water-based flexographic, gravure, screen, and specialty ink systems.
Low-foam operation supports stable pumping, accurate colour transfer, uniform print density, and clean application at high press speeds.
Silicone-free grades are selected when overprinting, lamination, adhesion, or surface-treatment processes are sensitive to silicone contamination.
Dynamic defoaming performance is particularly important in continuously recirculated ink systems.
Adhesives and sealants
Nonsilicone Defoamers reduce entrained air during mixing, compounding, pumping, coating, and curing of water-based adhesives and sealants.
Effective deaeration improves bond-line uniformity, coating weight, surface appearance, and mechanical performance.
Silicone-free chemistry supports applications where subsequent painting, printing, laminating, or bonding requires a clean surface.
Compatibility with polymer dispersions, tackifiers, fillers, thickeners, and preservatives is central to selection.
Textile processing
Nonsilicone Defoamers control foam during scouring, bleaching, dyeing, printing, washing, finishing, and effluent treatment.
Low-foam operation supports uniform liquor circulation, accurate dosing, efficient rinsing, and consistent fabric treatment.
High-temperature and high-electrolyte textile processes require stable foam control across changing bath conditions.
The selected grade should provide performance without causing spots, oil marks, uneven dyeing, or interference with finishing treatments.
Leather processing
Nonsilicone Defoamers are used during soaking, liming, deliming, bating, dyeing, fatliquoring, finishing, and wastewater treatment.
They reduce process interruptions and support uniform contact between treatment liquors and leather surfaces.
Low-residue and readily dispersible grades are preferred where surface appearance, finishing adhesion, and colour uniformity are important.
Compatibility with salts, acids, alkalis, dyes, oils, and proteinaceous materials influences performance.
Industrial and institutional cleaning
Nonsilicone Defoamers control foam in spray cleaning, bottle washing, floor cleaning, clean-in-place systems, parts washing, metal cleaning, and recirculating detergent systems.
They improve pump operation, spray pressure, tank capacity, soil separation, and rinsing.
Polyether and fatty-alcohol grades are frequently used in high-temperature or high-mechanical-energy cleaning.
Selection considers surfactant composition, alkalinity, soil load, water hardness, temperature, and rinse requirements.
Detergents
Nonsilicone Defoamers are incorporated into automatic dishwashing products, laundry detergents, powdered cleaners, and low-foam industrial detergent formulations.
They control excessive foam during manufacturing and end use.
Powder defoamers are suitable for dry detergent blends, tablets, and water-soluble unit-dose systems.
Liquid and emulsion grades are used in liquid concentrates and industrial cleaning products.
Metalworking and surface treatment
Nonsilicone Defoamers reduce foam in metal cleaners, machining fluids, grinding fluids, alkaline degreasers, electroplating baths, conversion coatings, and wastewater systems.
They support stable circulation, efficient filtration, accurate bath control, and uniform contact with metal surfaces.
Silicone-free products are valuable before painting, plating, welding, adhesive bonding, or other surface-sensitive operations.
Low-residue performance reduces the risk of adhesion loss and coating defects.
Construction materials
Nonsilicone Defoamers reduce air entrainment in cementitious mortars, gypsum products, concrete additives, tile adhesives, self-levelling compounds, repair materials, and dry-mix formulations.
Controlled air content supports density, strength, surface smoothness, water resistance, and dimensional consistency.
Powder and liquid grades are available for dry blending or liquid-admixture production.
Compatibility with cement, gypsum, polymers, cellulose ethers, superplasticizers, and mineral fillers determines final performance.
Mining and mineral processing
Nonsilicone Defoamers suppress foam in ore treatment, mineral slurries, flotation-related process streams, washing, thickening, filtration, hydrometallurgy, and tailings treatment.
Foam control improves tank capacity, pump performance, filtration, material transfer, and process visibility.
Product selection considers slurry solids, mineral type, pH, salinity, collectors, frothers, flocculants, temperature, and shear.
Controlled dosing is essential where foam performs a useful separation function in one process stage but becomes undesirable in another.
Oilfield and petroleum processing
Nonsilicone Defoamers control foam in drilling fluids, completion fluids, produced-water treatment, gas treatment, refinery operations, lubricants, and industrial oil systems.
Polyether and hydrocarbon-based grades can provide effective performance in high-temperature, saline, or chemically complex environments.
Selection focuses on brine compatibility, hydrocarbon interaction, operating pressure, temperature, separation behaviour, and downstream process requirements.
Low-residue grades are used when deposition or catalyst contamination must be minimized.
Agrochemical formulations
Nonsilicone Defoamers reduce foam during formulation, filling, dilution, tank mixing, pumping, and spray application of agricultural products.
They are used in suspension concentrates, soluble concentrates, emulsions, oil dispersions, fertilizers, and adjuvant systems.
The selected grade should remain effective in concentrated formulations and after dilution with hard or electrolyte-rich water.
Crop-use suitability, formulation stability, spray behaviour, and regulatory status are important procurement criteria.
Polymer dispersions and emulsion polymerization
Nonsilicone Defoamers control foam during monomer charging, polymerization, stripping, filtration, compounding, pumping, and filling.
They support stable processing of acrylic, styrene-acrylic, vinyl, styrene-butadiene, and other waterborne polymer dispersions.
Compatibility with the latex is essential because excessive defoamer incompatibility can create coagulum, surface defects, or storage instability.
The grade should provide efficient foam control without impairing particle stability, film formation, adhesion, or coating appearance.
Food and beverage processing
Qualified food-grade Nonsilicone Defoamers are used in fermentation, sugar processing, starch processing, washing operations, extraction, boiling, and other approved food-production stages.
Foam control improves vessel capacity, heat transfer, pumping, separation, and filling efficiency.
Only grades specifically manufactured and documented for the intended food application are appropriate.
Composition, dosage, manufacturing controls, and permitted-use status must meet the applicable food regulations.
Fermentation and biotechnology
Nonsilicone Defoamers control protein-, carbohydrate-, and biosurfactant-generated foam in fermentation vessels.
Effective control reduces overflow, contamination risk, sensor interference, and loss of working volume.
The selected grade should provide foam suppression without impairing oxygen transfer, cell growth, product recovery, membrane operation, or downstream purification.
Fatty-alcohol, ester, vegetable-oil, and polyether chemistries are used according to the biological process.
Sugar and starch processing
Nonsilicone Defoamers reduce foam during extraction, diffusion, clarification, evaporation, concentration, fermentation, and wastewater treatment.
They support stable heat transfer, accurate level control, improved throughput, and efficient separation.
Food-contact or processing-aid requirements determine the acceptable composition and documentation.
Low-odour and low-residue grades are preferred for sensitive production stages.
Chemical manufacturing
Nonsilicone Defoamers control foam in reactors, distillation systems, extraction equipment, mixing vessels, scrubbers, evaporators, and product-filling lines.
They reduce overflow, improve usable capacity, and support stable temperature and level control.
Chemical resistance, process temperature, pressure, solvent composition, pH, and downstream purity requirements determine grade selection.
Water-free products are available for systems where the introduction of water is undesirable.
GRADE SELECTION
Foaming medium
The first selection criterion is whether the system is aqueous, solvent-based, oil-based, or a mixed-phase formulation.
Aqueous emulsions provide convenient dispersion in water, while water-free concentrates are suited to processes that cannot tolerate added water.
Foam source
Foam can originate from surfactants, proteins, soaps, polymers, fermentation metabolites, fine particles, dissolved organic material, or high-shear air incorporation.
Identifying the principal foam stabilizer supports more accurate chemistry selection.
Operating temperature
Temperature changes carrier viscosity, active-particle mobility, wax melting, polyether solubility, and emulsion stability.
A defoamer should remain active throughout heating, processing, recirculation, cooling, and cleaning.
pH and electrolyte concentration
Strong acids, alkalis, salts, builders, and multivalent ions can alter defoamer dispersion and stability.
Ester hydrolysis, emulsion breakdown, salting-out, and changes in polyether cloud point must be considered in chemically demanding systems.
Initial knockdown and persistence
Rapid-knockdown products are selected for sudden or severe foam formation.
Persistent antifoam products are selected for long processing cycles and continuously aerated or recirculated systems.
Surface compatibility
Coatings, inks, adhesives, laminates, and surface-treatment processes require careful control of defoamer incompatibility.
The selected product should release air and destroy foam without producing craters, fisheyes, gloss loss, haze, poor adhesion, or print defects.
Filtration and deposition
Processes containing membranes, fine filters, heat exchangers, screens, and narrow transfer lines require low-deposit defoamer chemistry.
Particle size, melting behaviour, insoluble content, and dosage influence filterability and equipment cleanliness.
FORMULATION AND DOSING
Nonsilicone Defoamers can be added before foam formation, during processing, or directly to established foam.
Early addition supports preventive antifoam performance, while staged addition can maintain activity during extended processing.
The most effective addition point provides rapid distribution without subjecting the product to unnecessary high shear.
Addition close to a pump inlet or intense mixing zone can improve distribution, but excessive mechanical stress can damage water-based emulsions.
Concentrated defoamers can be added directly or diluted when the grade is designed for dilution.
Prepared dilutions should remain homogeneous and should be used under controlled storage and hygiene conditions.
Multiple small additions can provide stronger long-term control than a single excessive dose.
Overdosing can increase cost, destabilize formulations, create deposits, impair coating quality, or interfere with downstream processing.
Laboratory screening should reproduce the actual temperature, agitation, aeration, pressure, pH, electrolyte concentration, and process composition.
Evaluation should measure both initial foam knockdown and foam suppression over the required operating period.
QUALITY AND SPECIFICATION PARAMETERS
Commercial quality control can include appearance, colour, odour, active matter, water content, pH, density, viscosity, and particle-size distribution.
Aqueous grades can also require emulsion stability, freeze–thaw stability, microbial quality, and redispersibility testing.
Hydrocarbon-based grades can be specified for flash point, pour point, oil type, aromatic content, and volatile content.
Polyether grades can be controlled by cloud point, hydroxyl value, molecular distribution, water content, and viscosity.
Application-performance tests can measure foam knockdown time, foam height, foam recurrence, deaeration rate, persistence, dispersibility, and compatibility.
Testing in the actual process medium provides the strongest basis for final grade selection.
Special procurement requirements can include silicone-free status, mineral-oil-free status, VOC content, renewable-feedstock content, food-processing suitability, regulatory inventory status, absence of selected restricted substances, and packaging cleanliness.
DOCUMENTATION
Technical data sheets describe the product type, typical properties, application areas, handling requirements, and recommended incorporation method.
Safety data sheets provide hazard classification, exposure controls, first-aid measures, transport information, and disposal guidance.
Certificates of analysis document batch-specific specification results.
Additional declarations can address silicone content, mineral-oil status, food-processing suitability, allergen information, animal-origin content, regulatory inventories, restricted substances, and environmental characteristics.
SAFETY AND REGULATORY CONSIDERATIONS
Nonsilicone Defoamers do not have one universal hazard classification because the category includes different oils, polyethers, fatty derivatives, waxes, emulsifiers, solvents, and solid carriers.
The safety classification of each grade is determined by its complete formulation.
Some concentrated products can irritate the eyes or skin.
Appropriate gloves, protective clothing, and chemical splash goggles should be used during transfer, sampling, dilution, and spill response.
Hydrocarbon- or solvent-containing grades can be combustible and can present an aspiration hazard if swallowed.
Sources of heat, sparks, and open flame should be controlled where required by the product classification.
Spraying or high-temperature processing can generate irritating mists.
Adequate ventilation and closed transfer systems reduce inhalation exposure.
Spilled liquid defoamers create slippery surfaces.
Spills should be contained, absorbed with suitable material, and prevented from entering drains, soil, or surface water.
Food, feed, pharmaceutical, fermentation, and personal-care applications require grades with composition and documentation specifically suitable for the intended use.
Silicone-free status alone does not establish approval for these applications.
FIRST AID
Inhalation: Move the affected person to fresh air and obtain medical attention if coughing, irritation, dizziness, or breathing difficulty continues.
Skin Contact: Remove contaminated clothing and wash the affected skin thoroughly with water and soap.
Eye Contact: Rinse cautiously with clean water for at least 15 minutes, remove contact lenses when easy to do, and obtain medical attention.
Ingestion: Rinse the mouth, do not induce vomiting, and obtain medical advice.
HANDLING AND STORAGE
Store Nonsilicone Defoamers in tightly closed, correctly labelled containers in a cool, dry, and well-ventilated area.
Protect the products from excessive heat, direct sunlight, freezing, moisture, and incompatible materials.
Water-based emulsions should be protected from freezing and prolonged high temperatures.
Excessive agitation and repeated high-shear pumping can alter droplet size and reduce emulsion stability.
Viscous, waxy, or low-temperature-sensitive grades can be warmed gently to restore suitable handling viscosity.
Uniform indirect heating should be used to prevent localized overheating.
Use clean pumps, hoses, tanks, and sampling equipment.
Close containers promptly after use to prevent contamination, evaporation, oxidation, and microbial entry.
PACKAGING AND PROCUREMENT
Nonsilicone Defoamers are supplied in pails, drums, intermediate bulk containers, bags, lined cartons, and bulk deliveries according to physical form and order volume.
Powder products are supplied in moisture-resistant packaging, while liquid emulsions are packaged to protect against contamination and temperature damage.
Procurement specifications should identify the required chemistry, silicone-free status, physical form, active matter, carrier type, water content, viscosity, pH, density, flash point, particle size, and storage-temperature range.
Application requirements should define initial foam knockdown, long-term suppression, deaeration, dispersibility, surface compatibility, filtration behaviour, and operating conditions.
Ataman Kimya supplies Nonsilicone Defoamers for water treatment, pulp and paper, coatings, inks, adhesives, cleaning, textiles, construction, mineral processing, fermentation, and general industrial applications.
For product selection, technical documentation, packaging options, and commercial enquiries, contact Ataman Kimya at +90 216 577 10 10 or info@atamankimya.com.
