CasNo： 9016-00-6
MF： (C2H6OSi)n
Appearance： liquid
Delivery Time： 15 days
Packing： 20kg/drum
Purity： 99%
DC-56
20 kg/barrel, a small-to-medium capacity package suitable for small and medium-sized production enterprises, laboratory small-batch trials, or process links with low usage. This specification facilitates flexible use, precise dosage control, reduces storage pressure and capital occupation for small-volume users, and also enables short-distance transportation and rapid turnover.
The core component is methyl siloxane (usually referring to methyl siloxane compounds such as polydimethylsiloxane and its derivatives). These components have the characteristic of low surface tension, which is the key to achieving the defoaming function; they also have good chemical stability and compatibility, allowing them to play a stable role in solvent-based systems without easily reacting adversely with other components in the system.
For fine and stubborn foam commonly found in solvent-based systems, DC-56 can quickly penetrate the foam film wall, destroy the film's stability, and achieve efficient defoaming. Even in high-temperature process scenarios (such as the preheating stage before coating drying), it can still maintain excellent foam resistance, preventing secondary foam formation in high-temperature environments and ensuring that the production process and product quality are not affected by temperature fluctuations.
In solvent-based wood coatings, curtain coatings, and other coating systems, adding DC-56 can improve the leveling property of the coating—it reduces defects such as brush marks, shrinkage cavities, and orange peel caused by uneven surface tension after brushing or curtain coating, allowing the coating to spread evenly on the substrate surface. At the same time, it can enhance the gloss of the coating, making the paint film fuller and brighter, and improving the visual texture and grade of the end product.
In addition to defoaming and appearance optimization functions, DC-56 can also slightly improve the wear resistance of the paint film after the coating dries and forms a film. By improving the compactness of the internal structure of the coating, it reduces scratches and peeling of the paint film during friction. It is especially suitable for scenarios such as wood coatings that have certain requirements for surface wear resistance, extending the service cycle and appearance retention time of the product.
In processes that require multiple coating overlays (such as primer + topcoat application for wood furniture), DC-56 will not form an isolation layer on the surface of the underlying paint film or affect interlayer adhesion. When recoating later, the new coating can still bond closely with the old coating, avoiding problems such as delamination and peeling. It is suitable for multi-process and multi-coating production needs, without the need to adjust the recoating process due to the addition of antifoam.
Applicable to various solvent-based wood coatings (such as nitrocellulose wood coatings, polyurethane wood coatings). Whether it is the coating of furniture, floors, or wooden crafts, DC-56 can be added. It can not only eliminate fine foam generated during coating mixing and brushing to avoid pinholes in the paint film but also improve leveling and gloss, enhance the surface texture of wooden products, and ensure recoating effect and wear resistance.
For the curtain coating process (common in the mass coating of panel furniture and decorative panels), DC-56 can solve the foam problem caused by air entrainment when the coating flows at high speed during curtain coating, ensuring that the coating after curtain coating is uniform and free of defects. At the same time, it optimizes the leveling property, reduces the scraper marks of the curtain coater, and makes the coating surface flatter, improving the consistency and efficiency of mass production.
In solvent-free paint systems (such as solvent-free epoxy floor paints, solvent-free polyurethane anti-corrosion paints), DC-56 can effectively eliminate foam generated during paint mixing and construction (solvent-free systems have high viscosity, making foam more likely to remain). Its high-temperature foam resistance is suitable for the heating and accelerated curing stage of solvent-free paints before curing; at the same time, it does not affect the adhesion and anti-corrosion performance of the paint, ensuring the functional stability of the coating.
It is recommended to add DC-56 during the production and mixing stage of the solvent-based system (such as coatings, paints) or the paint mixing link before construction. Adding it during the production stage can inhibit foam generation in advance; if foam is found in the system before construction, it can also be added, but it is necessary to ensure sufficient stirring to avoid local high concentration leading to coating defects.
The addition amount needs to be adjusted flexibly according to the specific application scenario (such as wood coating, curtain coating), system viscosity, and foam severity. Generally, the recommended addition amount is 0.1% - 0.5% of the total mass of the system. When using it for the first time, it is recommended to conduct a small-batch test: add it in different proportions and test the defoaming effect, leveling property, and gloss to determine the optimal dosage suitable for the process, balancing performance and cost.
DC-56 can be directly and slowly added to the stirring solvent-based system (the stirring speed is recommended to be medium to avoid entraining a large amount of air again due to too fast stirring), and stirred for 5 - 10 minutes until it is completely dispersed. If the system viscosity is high, DC-56 can also be diluted 1 - 2 times with a small amount of system solvent (such as xylene, ethyl acetate) before adding to improve dispersion efficiency and ensure that the antifoam is evenly distributed in the system.
It should be stored in a cool, dry, and well-ventilated warehouse, avoiding direct sunlight and high-temperature environments (the recommended storage temperature is 5℃ - 30℃). High temperatures may cause the volatilization of methyl siloxane components or emulsion delamination, affecting the defoaming performance; low temperatures (below 0℃) may cause the product to solidify. After thawing, it is necessary to fully stir and check whether it returns to a uniform state; otherwise, it cannot be used.
When unopened, the packaging barrel must be tightly sealed to prevent moisture and impurities from entering and contaminating the product; if it is not used up after opening, the barrel lid must be tightened immediately for sealing to avoid product concentration changes or moisture absorption and deterioration due to solvent volatilization. Under the above storage conditions, the product's shelf life is usually 12 - 24 months (specifically subject to the product label). After expiration, the performance needs to be retested, and it can be used only if it is confirmed to be qualified.
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