Defom 5300

Product Details

CasNo： 64742-95-6

MF： C6H6-C4H11

Appearance： liquid

Delivery Time： 15 days

Packing： 25kg/drum

Purity： 99%

1. Basic Information

• Brand & Model: Defom 5300
• Core Ingredient: Modified polysiloxane. It is produced through specific chemical modification of the polysiloxane molecular structure, introducing special functional groups or altering the molecular chain structure. This enhances its compatibility with solvent-based coating systems while improving its ability to eliminate and inhibit various types of bubbles.
• Appearance & Character: Typically a colorless, transparent, or slightly light yellow homogeneous liquid with good fluidity, free from visible impurities and suspended matter. This allows for easy and uniform dispersion during coating production.
• Packaging Specification: 25 kg/drum. High-strength, corrosion-resistant, and well-sealed packaging drums are used, which can effectively prevent the product from volatilization, leakage, or contamination during transportation and storage, ensuring stable product quality.
• Physical Parameters:
  • Density: Approximately 0.96 - 1.03 g/cm³ (at 25℃), close to the density of most solvent-based coating systems. This facilitates the uniform distribution of the defoamer in the coating, enabling it to fully exert its defoaming effect.
  • Flash Point: ≥62℃, classified as a flammable liquid. Fire prevention measures should be taken during storage and use, and the product should be kept away from fire sources and high-temperature environments.
  • Viscosity: 120 - 350 mPa·s (at 25℃). The moderate viscosity allows for accurate metered addition during coating production and ensures rapid and uniform mixing with the coating system.

2. Product Features

• Efficient Elimination of Two-Component Polyurethane Reaction Bubbles: It delivers extremely significant defoaming effects on bubbles generated by carbon dioxide during the reaction of two-component polyurethane. It can quickly reduce the surface tension of the bubble film, causing bubbles to burst, effectively avoiding coating defects caused by residual bubbles and ensuring coating quality.
• Broad Bubble-Inhibiting Capability: It can efficiently inhibit and eliminate bubbles generated during coating manufacturing (e.g., stirring, mixing), agitation, and application (e.g., dipping coating, flow coating). Specifically, for bubble systems in dipping or flow coating operations, it exhibits excellent bubble inhibition and release performance, ensuring smooth coating application and a flat coating film.
• No Impact on Coating Transparency: When used in solvent-based coating systems, it does not negatively affect the coating’s transparency. It is particularly suitable for applications such as colored topcoats and clear coats that require high transparency, as it can maximize the retention of the coating’s original optical properties while defoaming, resulting in a clear and bright coating appearance.
• Good Compatibility: It has excellent compatibility with resins, solvents, pigments, and other components in solvent-based coating systems, and is less likely to cause incompatibility issues such as floating color or flooding. It can also effectively eliminate coating defects like fisheyes, pinholes, and craters, improving the surface quality and aesthetics of the coating film.
• Long-Lasting Defoaming Performance: It offers long-term defoaming and foam-inhibiting capabilities. During coating storage, it can continuously prevent the formation of new bubbles, ensuring the coating remains in good condition during use and reducing quality instability caused by bubble problems.

3. Application Fields

• Automotive Topcoat Field: Suitable for colored topcoats and clear coats in automotive original equipment manufacturer (OEM) paints and automotive refinish paints. It can effectively eliminate bubbles during production and application, ensuring a smooth, flat, and uniform-colored coating on the automotive body, enhancing the aesthetics and durability of the automotive exterior.
• Furniture Coating Field: In solvent-based wood coatings for furniture, it can eliminate bubbles generated during stirring and spraying, avoiding defects such as fisheyes and pinholes in the coating film. This results in a transparent and attractive coating on the furniture surface, protecting the wood while enhancing its decorative effect.
• Industrial Protective Coating Field: Used in solvent-based industrial protective coatings for various metal components (e.g., steel structure anti-corrosion paints, mechanical equipment topcoats). It prevents bubbles from affecting the coating’s adhesion and corrosion resistance, extending the service life of metal components and ensuring the normal operation of industrial equipment.
• Other Solvent-Based Coating Applications: It can also be applied to solvent-based coating systems with high coating quality requirements, such as marine coatings and aerospace coatings, meeting the strict defoaming and coating quality needs of different industries.

4. Usage Methods & Recommended Dosage

• Recommended Dosage: Generally 0.05% - 0.3% based on the total mass of the coating formula. The specific dosage needs to be adjusted according to factors such as the type of coating system, the severity of bubble formation, and the application process. For example, in two-component polyurethane systems with severe bubble issues, the dosage can be appropriately increased to 0.2% - 0.3%; for ordinary solvent-based coating systems with minimal bubble formation, the dosage can be controlled between 0.05% - 0.1%. It is recommended to determine the optimal dosage through small-scale formula tests to achieve the desired defoaming effect.
• Addition Methods:
  • Direct Addition Method: During the paint mixing stage of coating production, slowly and evenly add Defom 5300 to the coating system while turning on the mixing equipment. Control the mixing speed at 300 - 600 r/min and continue mixing for 15 - 30 minutes to ensure the defoamer is fully dispersed in the coating and uniformly mixed with other components.
  • Pre-Dilution Method: If the coating system has high viscosity, Defom 5300 can first be pre-diluted with a compatible solvent from the coating system at a ratio of 1:5 - 1:10. After thorough mixing, slowly add the diluted solution to the coating system and continue mixing for 20 - 30 minutes to ensure uniform dispersion of the defoamer in the high-viscosity coating and maximize its defoaming 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 5 - 35℃. Keep away from fire sources, heat sources, and strong oxidants to prevent product deterioration or safety accidents. The shelf life of unopened products is typically 12 - 18 months; after opening, the packaging drum must be sealed promptly to prevent product volatilization and reactions with substances in the air (which may affect defoaming performance). It is recommended to use the opened product within 3 months.
• Safety Precautions:
  • Operators must wear protective equipment such as gloves, goggles, and masks when using this defoamer to avoid skin and eye contact with the product. In case of accidental skin contact, rinse immediately with plenty of water; if splashed into the eyes, rinse with plenty of water for at least 15 minutes and seek medical attention promptly.
  • Since the product is flammable, the storage and use areas must maintain good ventilation. Open flames and smoking are strictly prohibited, and appropriate fire-fighting equipment (e.g., dry powder fire extinguishers) should be equipped to handle potential fire hazards.
  • During handling, carry with care to prevent damage to the packaging drum due to impact or extrusion (which may lead to product leakage). In case of leakage, immediately isolate the leaked area, absorb the leaked material with adsorbents (e.g., vermiculite, sand), and dispose of it properly in accordance with environmental protection requirements.