Shin-Etsu X-50-992 Self-Emulsifying Silicone Defoaming Agent

Shin-Etsu X-50-992 is a self-emulsifying silicone defoamer containing 100% active ingredients, composed of hydrophilic-modified silicone fluids and fluid compounds. It forms a uniform emulsion simply by adding water, and can be used with both aqueous and non-aqueous foaming liquids. It combines rapid foam knockdown with long-lasting foam control and remains stable when diluted, making it especially suitable for demanding applications such as high-temperature dyeing processes and pulp manufacturing.

• Fast acting — rapid foam knockdown.
• Long lasting foam control.
• Stable when diluted.
• Self-emulsifying — forms a uniform emulsion with water.
• High-temperature stable.
• Resistant to acids and alkalis (better than emulsion types).
• 100% active ingredients — no fillers, all-silicone composition.
• Versatile — suitable for aqueous and non-aqueous systems.

Note: Marks (●) indicate outstanding characteristics; “Not specified” means no value is given. Data are not for specification purposes.

• High-temperature dyeing processes.
• Pulp manufacturing processes.
• Foam control in aqueous and non-aqueous foaming liquids.
• Applications requiring acid / alkali and high-temperature resistance.

• Dilution:

Dilute 5- to 10-fold with water at 30°C or below to produce a uniform emulsion; add water gradually in equal portions with stirring for a more stable emulsion.

• Amount to Add:

Typical addition is 1–200 ppm; start with about 50 ppm (0.005%) of active ingredient and adjust as needed.

• Addition Methods:

Add in advance to the foaming liquid, apply by continuous drip, or spray directly on the foam. Use a nozzle with a relatively large aperture for spraying to avoid excessive atomization.

• Certain self-emulsifying defoamers may exhibit separation of the fluid layer or precipitation during storage, but this does not affect defoaming performance. Shake or stir until evenly mixed before use.
• After opening, seal tightly and store in a cool, dark place. Use soon after first opening.
• When using products that contain solvent, provide ventilation and avoid breathing solvent vapors.
• Please read the Safety Data Sheet (SDS) before use.

Q: What type of defoamer is X-50-992?

A: It is a self-emulsifying silicone defoamer containing 100% active ingredients.

Q: How is it diluted?

A: Dilute 5- to 10-fold with water at 30°C or below to form a uniform emulsion.

Q: What systems is it suitable for?

A: It can be used with both aqueous and non-aqueous foaming liquids.

Q: What are the main applications?

A: High-temperature dyeing processes and pulp manufacturing, especially where high-temperature and acid / alkali resistance are required.

Q: What is the recommended dosage?

A: Typically 1–200 ppm; start with about 50 ppm of active ingredient and adjust as needed.