Defom 5400

Product Details

CasNo： 8020-83-5

Appearance： liquid

Delivery Time： 15 days

Packing： 25kg/drum

Purity： 99%

1. Basic Information

• Brand & Model: Defom 5400
• Core Ingredient: Polysiloxane, a type of high-molecular compound with a siloxane bond as the main chain and organic groups as side chains. Due to its low surface tension, it can quickly penetrate the bubble film and destroy its stability, thereby achieving efficient defoaming and foam inhibition.
• Appearance & Character: Typically a colorless to light yellow transparent liquid with good fluidity, free from visible mechanical impurities to the naked eye. It is easy to disperse and mix in solvent-based coating systems.
• Packaging Specification: 25 kg/blue iron drum. High-quality blue iron drums are used, which feature excellent sealing, solvent resistance, and impact resistance. They can effectively prevent product leakage, volatilization, or external contamination during transportation and storage, ensuring stable product performance.
• Physical Parameters:
  • Density: Approximately 0.95 - 1.05 g/cm³ (at 25℃), close to the density of most solvent-based coating systems, which is conducive to uniform dispersion and full exertion of the defoaming effect.
  • Flash Point: ≥60℃, classified as a flammable liquid. It must be kept away from open flames and high-temperature sources during storage and use.
  • Viscosity: 50 - 300 mPa·s (at 25℃). The moderate viscosity facilitates metered addition and system mixing, avoiding dispersion difficulties caused by excessively high viscosity.

2. Product Features

• Powerful Defoaming and Foam-Inhibiting Ability: It has an excellent control effect on various bubbles in solvent-based coating systems. Whether bubbles are introduced during production, mixing, or generated during application (such as curtain coating and roller coating), it can quickly eliminate them and inhibit their reformation for a long time. In particular, it has an extremely significant effect on eliminating carbon dioxide bubbles generated by the reaction of two-component polyurethane.
• Application-Specific Advantages: It performs outstandingly in the application of thick-film polyurethane coatings, effectively solving the problem of bubble formation in thick films. For dipping coating and mixed coating baking systems, it can significantly inhibit bubble generation during high-temperature baking and promote bubble release, ensuring coating quality.
• Dual Function of Wetting: As an excellent defoamer-type wetting aid, it can improve the wettability of coatings on substrates, reduce defects such as bubbles and pinholes caused by poor wetting, and enhance coating adhesion and uniformity.
• Excellent Compatibility: It has good compatibility with resins, solvents, pigments, and other components in solvent-based coating systems. It will not cause system turbidity, delamination, or affect coating properties such as gloss and color. It is suitable for scenarios with high appearance requirements, such as various colored topcoats and clear coats.
• Comprehensive Elimination of Surface Defects: It can effectively solve common coating defects such as pinholes, fisheyes, and craters, ensuring a smooth and flat coating surface and improving the decorative and protective properties of products.

3. Application Fields

• Solvent-Based Coating Systems: Widely applicable to various solvent-based coatings, especially excelling in polyurethane coatings, and can meet the defoaming needs of different application processes.
• Thick-Film Coating Scenarios: Targeting thick-film polyurethane coatings, it effectively eliminates bubbles that tend to form during thick-film curing, ensuring uniform coating thickness and no defects.
• Specific Coating Processes: In curtain coating and roller coating processes, it can efficiently inhibit and eliminate bubbles generated during application, ensuring coating continuity and quality. It is also suitable for dipping coating and mixed coating baking systems to solve bubble problems during the baking stage.
• Coatings with High Appearance Requirements: Particularly suitable for coatings with high requirements for surface flatness and gloss, such as various colored topcoats and clear coats. It eliminates surface defects and enhances product grade.

4. Usage Methods & Recommended Dosage

• Recommended Dosage: Generally 0.05% - 0.5% based on the total mass of the formula. The specific dosage needs to be adjusted according to factors such as the type of coating system, foaming degree, and application process. For two-component polyurethane systems with high foaming risks or thick-film application, the dosage can be appropriately increased. It is recommended to determine the optimal dosage through small-scale tests.
• Addition Methods:
  • Direct Addition Method: At the appropriate stage of coating production (usually the dispersion or paint mixing stage), slowly and evenly add Defom 5400 to the system under stirring, and continue stirring for 10 - 15 minutes to ensure full dispersion.
  • Pre-Dilution Method: If more precise control of addition is required or the system viscosity is high, the defoamer can first be diluted with solvents in the system (dilution ratio 1:3 - 1:10), then added under stirring to improve dispersion efficiency.

5. Storage & Safety

• Storage Conditions: Should be stored in a cool, dry, and well-ventilated warehouse, avoiding direct sunlight and high-temperature environments. The recommended storage temperature is controlled at 5 - 35℃. The shelf life of unopened products is usually 12 months. After opening, the product must be sealed and used as soon as possible to prevent performance degradation.
• Safety Precautions:
  • Operators must wear protective gloves, goggles, and masks to avoid direct contact with skin and eyes. In case of accidental contact, rinse immediately with plenty of water; if splashed into the eyes, seek medical attention promptly.
  • The product is flammable. Open flames are strictly prohibited in storage and use areas, and corresponding fire-fighting equipment must be equipped. Avoid storing or transporting it together with strong oxidants and other substances.
  • Handle with care during transportation to prevent damage to the packaging drum and subsequent product leakage.