Packaging Specification: 25 kg/blue barrel (Packaged in high-strength blue plastic barrels with good sealing performance, which can effectively prevent product volatilization, leakage and external impurity pollution, and is convenient for storage, handling and use in small-batch production scenarios)
Main Ingredient: Organosilicon (Formulated with polysiloxane as the core active ingredient, supplemented by stabilizers, dispersants and other additives through a specific process. Its molecular structure has both hydrophobic and hydrophilic groups, which can quickly act on the foam interface to achieve defoaming function)
2. Product Characteristics
(1) Physical Properties
Appearance: Colorless to slightly yellow transparent liquid, without obvious mechanical impurities, uniform in texture and good in fluidity, easy to transport through pipelines or add manually, and can be quickly mixed with various systems.
Density: At 25°C, the density is about 0.92 - 1.05 g/cm³, which is similar to the density of water and most water-based coatings, inks, cleaning solutions and other systems, and can be naturally dispersed without additional strong stirring.
Viscosity: The kinematic viscosity at 25°C is about 50 - 200 mPa·s. The viscosity is moderate, which will not cause insufficient concentration of active ingredients due to being too thin, nor will it affect the dispersion speed due to being too thick.
Flash Point: ≥100°C, it is a low-risk flammable product, and has high safety during storage and use, and no special explosion-proof measures are required (still need to stay away from open flames).
Solubility: Easily dispersed in polar systems such as water, water-based coatings, water-based inks, and cleaning solutions, insoluble in non-polar solvents such as mineral oil and solvent oil, and no delamination or precipitation after dispersion.
(2) Core Performance Advantages
Efficient Defoaming and Long-lasting Foam Inhibition: After contacting the foam, it can quickly destroy the foam film structure within 3 - 5 seconds to eliminate the generated foam; at the same time, the active ingredients will be adsorbed on the gas-liquid interface to form a "protective film" to inhibit the generation of new foam, and the foam inhibition time can reach 8 - 12 hours, avoiding the repeated occurrence of foam during the production process (such as coating stirring, ink printing, cleaning spraying, etc.).
Low Addition Amount, High Cost Performance: In different application scenarios, the recommended addition amount is only 0.05% - 0.3% of the total system (for example, adding 0.1% in water-based furniture coatings can achieve the ideal effect), and a small amount of addition can be effective, reducing raw material costs.
Excellent Compatibility: It has no adverse reactions with components such as resins in water-based coatings (such as acrylic resin, polyurethane resin), color pastes in inks, and surfactants in cleaning solutions, and will not cause problems such as loss of gloss of coatings, color deviation of inks, and reduction of activity of cleaning solutions, ensuring the quality of end products.
Temperature and Acid-base Resistance: It can play a stable role in the temperature range of 5 - 80°C (covering the normal temperature stirring before coating drying, medium temperature spraying in the cleaning process, etc.); in the system with pH value of 4 - 11 (such as weakly acidic water-based ink, weakly alkaline cleaning solution), the performance does not decay significantly, meeting the needs of multiple working conditions.
No Undesirable Residues: After the coating film is formed and the ink is dried, the residual organosilicon components will not cause shrinkage cavities and fish eyes in the paint film, nor will they affect the adhesion and wear resistance of the ink; in the cleaning scene, it is easily biodegradable after being discharged with wastewater, and will not cause secondary pollution.
3. Action Principle
Destroy the Stability of Foam Film: The polysiloxane chain segment (hydrophobic group) in the organosilicon molecule will be quickly adsorbed to the gas-liquid interface of the foam, replacing the original surfactant molecules, breaking the "double electric layer stable structure" of the foam film, and making the foam film wall thinner and less strong.
Accelerate Foam Rupture: The surface tension of polysiloxane is much lower than that of water (about 20 - 25 mN/m, the surface tension of water is about 72 mN/m), which will cause uneven local surface tension of the foam film and generate "tension difference", which promotes the rupture of the foam film and releases the internal gas.
Inhibit the Generation of New Foam: The organosilicon molecules that do not participate in defoaming will be evenly dispersed in the system. When a new foam core is formed, it will be preferentially adsorbed to the gas-liquid interface to prevent surfactant molecules from aggregating to form stable foam, achieving long-lasting foam inhibition.
4. Applicable Scenarios
(1) Coating Field
Water-based Furniture Coatings: Used for water-based topcoats and primers of solid wood furniture and panel furniture, eliminating the foam generated during the stirring and spraying of coatings, and avoiding pinholes and bubbles after the paint film dries, improving the flatness and gloss of the paint film.
Leather Coatings: Suitable for the surface coating of PU leather and PVC leather, solving the foam generated when the coating is roll-coated or sprayed due to the porous structure of the leather, ensuring uniform coating coverage without missing coating or bubbling.
PU Printing Paste: Used in the PU printing process of textiles, eliminating the foam generated during the stirring and scraping of the printing paste, preventing the printed pattern from having broken lines and bubbles, and ensuring the clarity and adhesion of the printing.
Paints (water-based systems): For water-based industrial paints (such as water-based paints for metal parts), eliminate the foam in the paint during preparation and dip coating, avoid defects after the paint film dries, and improve the anti-corrosion performance of the workpiece.
(2) Ink Field
High-end Water-based Inks: Suitable for packaging printing (such as carton water-based inks, plastic film water-based inks) and book printing water-based inks, eliminating the foam generated during the grinding, stirring and printing (such as flexographic printing, gravure printing) of water-based inks, preventing "small white spots" and "missing prints" on printed matter, and ensuring uniform color and complete patterns.
(3) Cleaning Field
Wine Bottle Cleaning: Used in the cleaning process of recycled bottles such as beer bottles and white wine bottles, eliminating the foam generated when the cleaning solution (containing surfactants) is sprayed under high pressure, avoiding clogging of spray holes by foam and affecting cleaning efficiency, and preventing odor caused by foam residue on wine bottles.
Circuit Board Cleaning: For water-based cleaning of PCB circuit boards (such as rosin removal, flux cleaning), eliminate the foam of the cleaning solution during ultrasonic cleaning or spray cleaning, avoid the foam wrapping the circuit board components, ensure thorough cleaning, and do not affect the subsequent welding quality.
(4) Water Treatment Field
Neutralization Link: During the neutralization treatment of industrial wastewater (such as coating wastewater, ink wastewater), eliminate the foam generated by acid-base neutralization reaction, prevent the foam from overflowing the reaction tank, and reduce the cleaning frequency of wastewater treatment equipment.
Biological Treatment Link: Used in the aerobic biological tank of sewage treatment plants to inhibit the foam generated by microbial metabolism during aeration, avoid the foam affecting the oxygen transfer efficiency, and ensure the effect of biodegradation.
Drainage Link: In the final sedimentation link before the wastewater meets the discharge standards, eliminate residual foam to prevent the foam from entering the natural water body with the drainage, meeting the environmental discharge requirements.
5. Usage Methods and Precautions
(1) Usage Methods
Adding Timing:
Coatings/Inks: It is recommended to add in the later stage of system preparation (such as after pigment dispersion is completed and before adjusting viscosity) to avoid loss of active ingredients due to strong stirring in the early stage.
Cleaning Solution: Add synchronously with components such as surfactants and chelating agents when preparing the cleaning solution to ensure uniform dispersion.
Water Treatment: Continuously add dropwise when the industrial wastewater (such as coating wastewater, ink wastewater) enters the neutralization tank, or add it all at once before the biological tank is aerated (adjust according to the amount of foam generated).
Adding Method:
Direct Addition: Suitable for small-batch systems (such as laboratory sample preparation), slowly pour into the system and stir for 1 - 2 minutes.
Dilution Addition: In mass production, the defoamer can be diluted 5 - 10 times with deionized water or system solvent (for example, 25 kg of defoamer plus 100 kg of water), and then injected evenly through a metering pump to avoid "shrinkage cavities" caused by excessive local concentration (only need to pay attention to the coating/ink scene).
Recommended Addition Amount:
Coatings/Inks: 0.05% - 0.2% (based on the total mass of the system);
Cleaning Solution: 0.1% - 0.3%;
Water Treatment: 0.1% - 0.5% (adjust according to the foam concentration, and can be appropriately increased to 0.8% when the foam is serious).
(2) Precautions
Storage Conditions: Store in a cool, dry and ventilated warehouse after sealing, avoid direct sunlight, and store at a temperature of 5 - 35°C; keep away from strong acids, strong alkalis and strong oxidants (such as concentrated sulfuric acid, sodium hypochlorite) to prevent chemical reactions leading to failure; the shelf life of unopened products is 12 months, and the remaining products need to be used up within 3 months after opening, and the remaining products need to be sealed in time.
Safety Protection: Wear acid and alkali resistant gloves and goggles during operation to avoid direct skin contact (if it contacts the skin, rinse with clean water for 10 - 15 minutes, no irritation); if it accidentally enters the eyes, rinse immediately with plenty of water and seek medical attention (the product is weakly alkaline and has slight irritation to the eyes); oral administration is prohibited. If accidentally ingested, drink milk immediately and seek medical attention.
Compatibility Test: When using in a new system for the first time (such as a new water-based resin coating, a special formula water-based ink), a small-batch compatibility test should be carried out first (such as preparing a 100g system, adding 0.1% defoamer, and observing whether there is delamination or precipitation within 24 hours, and whether the performance of the end product is affected), and use it in batches after confirming that there is no problem.
Avoid Excessive Addition: When the addition amount exceeds 0.5%, it may cause the gloss of the coating film to decrease and the adhesion of the ink to decrease, so the dosage needs to be strictly controlled.
