DF

DESCRIPTION:

AT-DF is a highly stable, long-lasting, “reacted” silicone defoamer which virtually eliminates problems associated with improperly emulsified silicone oils found in most silicone defoamers. Readily dispersible, AT-DF is effective under a broad range of conditions including high -temperature and pressure processes.

ADVANTAGES:

• Eliminates foam efficiently throughout drying cycle – defoams even during depressurizing of jets.
• Superior compatibility with dyes and other chemicals stable to most electrolytes.
• Efficient and stable at high temperatures; resistant to emulsification by processing surfactants.
• Effective in all types of dyeing equipment; leaves no scum ring, avoids dye spots.

FIELD OF APPLICATION:

Selecting a defoamer involves far more than evaluating its efficiency to kill foam. The product must be finely balanced to control foam, yet have the stability necessary to prevent any negative effects caused by the active defoaming ingredients. However AT-DF can be used in the following areas:

• Precast / prestressed concrete production
• Concrete pavement repairs
• Repairs of the industrial floors
• Repairs of concrete slabs and flat members

DOSAGE:

• 0.05% to 0.1% by weight of System

STABILITY OF DEAFOAMING STRENGTH Unlike other silicone defoamers AT-DF is stable in baths containing high concentrations of electrolytes which can come from one or more of the following sources:

• pH modifiers (ammonium sulphate, MSP, TSP, other salts).
• Water (hardness ions and trace metals).
• Dyestuffs (the dye molecule, salt, diluents, and/or dispersants).
• Chemicals (cationic or anionic materials).
• Salts (common salt, Glauber salt).

COMPATIBILITY:

AT-DF is compatible with most admixtures used in the production of quality concrete including normal, other mid-range and high-range water-reducing admixtures, air entertainers, accelerators, retarders, extended set control admixtures, corrosion inhibitors, and shrinkage reducers. AT-DF is also compatible with slag and Pozzolans such as fly ash and silica fume
CAUTION: The effect of AT-DF is dependent upon the cement properties and the type of plasticizers used in the concrete mix.

TECHNICAL DATA:

PACKAGING & STORAGE:

• AT-DF is available in 50 kg & 200 kg HDPE container
• Shelf life is 24 months in original & sealed packing
• Stirring of barrel before each use is highly recommended
• Storage condition should be free from frost and protect from direct sunlight
• Keep packing in cool, dry place away from heat, cold and moisture
• Stir material well before use

HEALTH & SAFETY:

• Protect hands with rubber gloves and eyes with goggles.
• Accidental splashes to the skin or eyes must be rinsed immediately with clean water.
• Store in well-labeled containers.