How to use polyether defoamer GP-330? What is the recommended dosage?

GP-330 is a liquid polyether defoamer. It is recommended to add it directly or after dilution into the system. The typical dosage is 0.01% to 0.3% of the total system weight. The specific dosage should be determined through experiments based on the actual process.

Detailed Explanation

Polyether defoamer GP-330 (CAS No.: 68439-50-9) appears as a colorless to light yellow transparent viscous liquid. It is a nonionic surfactant with an HLB value of approximately 1 and has good dispersibility in water. The product is in liquid form, making it very convenient for metering and addition. It can be directly added at any stage of the production process, disperses evenly, and is not prone to stratification or sedimentation, which is a major advantage over solid defoamers in terms of ease of use.

GP-330 is specifically designed for water-based systems, offering excellent defoaming speed and long-lasting foam suppression. It has strong chemical stability, can withstand acidic, alkaline, and hard water conditions, and maintains stable defoaming activity even at high temperatures. In practical applications, GP-330 achieves foam breaking by disrupting the liquid film structure of foam, while its low HLB value allows it to continuously suppress foam formation in the system, effectively preventing foam regeneration.

Technical Parameters

Application Recommendations

Addition Method: GP-330 is a liquid product and can be added directly or after pre-dilution. It is recommended to add it slowly while the system is being stirred to ensure uniform dispersion and optimal defoaming performance. For continuous production processes, quantitative continuous addition can be achieved using a metering pump. For batch production, a portion can be pre-added as a foam suppressant before foam generation, with additional product added when foam appears to break existing foam. According to the Guoli Chemical Product Database, the effective active content of this product is 20% to 100% (depending on the specification). Please confirm the specific specification when selecting the product.

Recommended Dosage Reference: The Guoli Chemical Product Database does not provide a unified fixed dosage recommendation (actual dosage varies significantly depending on the formulation and process conditions). The following are typical industrial dosage ranges for reference during trial stages:

• Water-based coatings/adhesives: 0.1% to 0.5% of total formulation weight
• Water-based inks: 0.05% to 0.3% of total formulation weight
• Industrial water treatment: 0.01% to 0.1% of total system weight (approximately 10 to 100 ppm)
• Textile dyeing and finishing: 0.05% to 0.3% of working solution weight
• Papermaking process: 0.02% to 0.2% of pulp weight
• Metalworking fluids: 0.05% to 0.2% of working solution weight
• Industrial cleaning: 0.1% to 0.5% of cleaning solution weight

It is recommended to start with a low dosage in new formulations or processes and conduct gradient experiments to gradually find the optimal balance between defoaming effect and cost efficiency. Excessive addition may cause turbidity or slight stratification in the system and should be avoided.

Precautions

• Storage and pre-use inspection: The product should be stored at a temperature of 5°C to 35°C. Once opened, it should be used as soon as possible. If slight stratification or turbidity occurs after long-term storage, stir thoroughly before use; this does not affect the defoaming performance.
• Addition timing: It is recommended to add the product slowly while the system is being stirred to avoid local high concentration caused by one-time large addition, which may affect dispersion.
• Compatibility verification: When using the product for the first time in a new formulation system, it is recommended to conduct small-scale trials to verify compatibility, ensuring no defects such as cratering or fisheyes in the coating film before large-scale use.
• Safety operation: Wear chemical protective gloves and safety goggles during operation. Avoid contact with eyes and skin. The product is slightly toxic to aquatic organisms. Do not discharge untreated waste liquid directly into water bodies.