High-purity silicone polymers engineered for supreme knock-down speed, bubble rupture, and long-term foam suppression durability.
How high-viscosity siloxane backbones and surface tension differentials break resilient interfacial foam films.
Viscous silicone oils maintain typical surface tension values between 20 to 22 mN/m, significantly lower than common aqueous surfactant systems (30–45 mN/m). This thermodynamic gap enables the silicone droplets to rapidly enter, spread, and destabilize the foaming lamella.
Higher kinetic viscosity (from 500 cSt to over 100,000 cSt) preserves defoamer droplet integrity under intense shear stress, turbulent liquid flows, and prolonged boiling conditions, preventing premature emulsification and ensuring continuous foam suppression.
Built upon robust Si-O-Si polymer backbones, viscous silicone fluids resist oxidative degradation, strong acids, alkaline liquors, and high process temperatures up to 250°C without breaking down or causing downstream contamination.
In modern industrial operations, unwanted foam generation introduces massive operational bottlenecks. Foam accumulation reduces effective vessel capacity, creates pump cavitation, triggers overflow hazards, impedes thermal transfer, and slows down chemical reaction rates. Viscous silicone oil for defoaming industrial processes serves as the premier antifoam core across heavy manufacturing industries. By formulating viscous polydimethylsiloxanes (PDMS) with hydrophobic silica nanoparticles and specialized organo-functional groups (such as hydrogen-terminated, vinyl, or polyether modifications), industrial engineers achieve both instantaneous defoaming ("knock-down") and prolonged anti-foaming ("hold-back") performance.
Tailored viscous silicone defoaming performance across harsh industrial sectors.
In delayed coking units, amine gas sweetening units, and crude oil separation trains, extreme agitation and heavy hydrocarbon foaming cause severe column carryover. Viscous silicone oils resist cracking at elevated temperatures, effectively flattening dense surfactant-stabilized crude foam caps and maximizing refinery throughput without poisoning downstream catalytic beds.
Kraft pulping and paper sizing generate resilient, high-alkali foam saturated with lignosulfonates. Viscous silicone defoamers withstand pH levels ranging from 11 to 14 while remaining completely dispersed under high-shear paper machine operations, boosting washing efficiency and sheet deaeration without silicone oil spotting.
Industrial wastewater streams containing detergents, biosurfactants, and proteinaceous waste generate thick biological or chemical froth. Silicone defoamers ensure rapid collapse of foam blankets at extremely low dosages (5 to 50 ppm), safeguarding biological clarifying basins and sensor arrays from false readings.
High-viscosity polymer synthesis and resin blending entrap macro- and micro-air bubbles. Organo-modified viscous silicone oils prevent cratering, pinholes, and micro-bubble entrapment in high-solids automotive coatings, industrial adhesives, and construction slurries, ensuring flawless surface finishes.
| Silicone Defoamer Backbone Type | Kinematic Viscosity (cSt @ 25°C) | Key Performance Mechanism | Primary Industrial Field |
|---|---|---|---|
| Hydrogen-Terminated Silicone Oil | 50 – 5,000 | Reactive Si-H groups allow custom organo-modification and synthesis of high-stability emulsifiable defoamers. | Chemical Synthesis, Specialty Emulsions, Custom Surfactants |
| High-Viscosity PDMS / Dimethicone | 12,500 – 100,000 | High droplet cohesion and film tension displacement under strong mechanical shear and turbulent flow. | Petroleum Refining, Heavy Pulp & Paper, Bitumen Deaeration |
| Amino-Modified Silicone Fluid (BY-209) | 300 – 10,000 | Strong affinity to fiber surfaces and dynamic surfactant balance; prevents surface pinholing. | Textile Dyeing, Fiber Treatment, Finishing Auxiliaries |
| Vinyl-Functional Silicone Fluid | 100 – 20,000 | Cross-linkable network formation creating solid-liquid compound antifoams with extended shelf endurance. | Silicone Rubbers, Resin Polymerization, Adhesives |
| OH-Hydroxy Terminated Silicone Fluid | 500 – 80,000 | Active silanol terminal groups form flexible elastomeric films to rupture viscous foam membranes. | Industrial Slurries, Fermentation, Construction Coatings |
Sustainable, hyper-concentrated, and AI-optimized chemical dosing for next-generation manufacturing.
Global regulations (REACH, EPA) require ultra-low cyclosiloxane (D4/D5/D6 < 0.1%) content and reduced volatile organic compounds. Modern viscous silicone fluids are synthesized with higher molecular purity to eliminate environmental accumulation while delivering superior defoaming kinetics.
The development of polyether-silicone block copolymers provides self-dispersing properties in water systems without requiring aggressive chemical emulsifiers, drastically reducing oily separation rings and nozzle clogging in automated dosing pipelines.
By pairing high-viscosity silicone cores with nanoscale silica particles, new-generation defoamer formulations lower dosage demands from hundreds of parts-per-million to single-digit ppm, yielding substantial operational cost savings.
Hangzhou Bayee Chemical Co., Ltd. started chemical products exporting from 2001, manufacturers based exporter focused in chemical products covering Silicone series, Phosphorus series including Silicone Monomers, Cyclosiloxane, Silicone Oils, Agro Chemicals, Fire Retardants & Auxiliaries etc. Company has direct Import & Export right, Dangerous Cargo Permission Certificate. Based on 20+ years exporting history and persistent improvements, we have now grown and developed into a well known & good reputation exporter with ISO 9001:2015, AAA Credit certified company, also granted by local government as Healthy Enterprise, and A level Tax Ranking.
Integrated supply chain advantages across premier chemical industrial clusters in China.
Based on strategic factories in Zhejiang, Jiangsu, Shandong, Anhui, Jiangxi, Hubei, Hunan, Hebei and Henan provinces etc, we export not only good quality products, competitive EXW costs, but also honesty, safety and international philosophies to customers. We work tightly with competitive production sites across whole China, who have special advantages, located in professional industrial areas, close to raw material bases, locally supplied with energy - gas or steam pipe connected with neighbour enterprises in same areas to reduce transportation costs.
Our factories have advanced ideas in technique crafts for higher yield production, unit consumption reducing from raw materials, also re-used the by-products for own downstream production for other products. By the way, we always keep close observation about raw material changing trend, react actively with factories shoulder by shoulder from organizing raw material at good times to secure more competitive production costs and share spaces with customers helping win their market shares. At the same time, we have wide connection with Chinese powerful chemical institute organizations for testing and supervising quality control in production process.
Up till now we’ve developed and supplied to many countries and areas all over the world, with main markets in European countries (Germany, Italy, UK, Spain, Ukraine, Russia, Poland, etc.), USA, South America, Mid East, South-east Asia, Australia, etc. Also seeking more strategic partners and customers under mutual benefits and work through the whole purchasing chain.
Explore our comprehensive portfolio of reactive, modified, and viscous silicone oils engineered for superior process efficiency.