Version 20190909	Technical Data sheet
Product Name	A-406
Product Description	A-406  is  a  kind  of  modified  polyether  powder  defoamer with  high  defoaming  efficiency.  It  is suitable for cementitious mortars with requirement of high fluidity and high strength.
Product Performance	A-406 can impart mortar quick and long defoaming effect. Through  its  dosage  adjusted,  A-406  can  optimize  air  bubble  size  and  distribution &  in mortar system to improve flowing ability. A-406 is of good compatibility with various kind of cement or gypsum binders and other additives, such as retarder, expansive agent, accelerator etc. With A-406 inside, it is easy to obtain a perfect finishing surface.
Recommending Application	Flowable mortar or slurry for grouting application Flowable mortar for spreading application Flowable mortar for brushing application Other flowable mortar or concrete
Usage & Dosage	Dry  mixed  homogeneously  with  other  ingredients  of  dry  mortar  and  packaged  as  one product,  which  can   be  at job  site   mixed  with   recommended   dosage  of  water  for application. Recommended  dosage  is  0.02-0.2%  based  on  the  total  eight  of  mortar.  The  detailed dosage should  be  determined  by  test  in  advance  according  to  local  raw  materials  and construction  regulation.
Packaging Specification	PE-lined plastic woven bag, 25kg/bag
Storage & Transportation Condition	Storage and transportation should  be carried out  in cool and dry condition.  Under  high temperature  and   high   humidity,   product   should   be   kept   away  from   moisture   and pressure to avoid coalescence  or agglomeration. If the  product  is  not  used  up,  the  opened  package  must  be  sealed  tightly  to  prevent moisture from ingress.
Shelf Life	9 months since production. For product stored over shelf life, test confirmation should be done before use
Safety Data	This product is of non-toxicity, non- irritation, non-spontaneous combustion. For detailed safety issue, please refer to  MSDS.
Typical Product Data	Appearance：whitish powder with good fluidity
	Bulk density：300-500kg/m3
	Dispersing ability in water：easy dispersing into water
	pH value of 1% in water @20℃ ：7-9

All of data, suggestions, and proposals presented here are based on our current knowledge and experience in raw materials and application technologies, which do not exclude the responsibility of users to scrutinize the quality of all received products. Because we are out of control of quality in users’ raw materials, production and application methods, service conditions as well as local standards, our suggestions and proposals do not imply any guarantee and promise for end product’s quality. The users should be responsible for formulation adjustment according to real conditions to meet project quality requirements.

 

Key Features & Benefits

Exceptional Knockdown & Persistence: Rapidly breaks existing surface foam and prevents re-foaming for extended periods.

Broad Compatibility: Effective across a wide pH range and in systems containing various surfactants and electrolytes.

Easy Handling & Dispersion: Ready-to-use, low-viscosity emulsion ensures easy pumping and homogeneous dispersion.

High Efficiency: Low dosage rates deliver significant cost savings.

Improved Process Efficiency: Minimizes downtime for foam-related cleaning, boosts production rates, and prevents overflow.

Enhanced Product Quality: Eliminates foam-related defects in coatings, adhesives, and finished products.

Equipment Protection: Reduces stress on pumps and agitators caused by air entrainment.

Emulsion Stability: Resists shearing and maintains performance under typical process conditions.

 

Technical Parameters

Parameter	Specification/Value	Test Method
Appearance	Milky white emulsion	Visual
Active Content	20% Silicone	Gravimetric
Type	Oil-in-Water (O/W) Emulsion	-
Density (at 20°C)	~1.00 g/cm³	ASTM D1475
Viscosity (Brookfield, 20°C)	< 500 mPa·s (cP)	ASTM D2196
pH (as supplied)	6.0 - 8.0	ASTM E70
Ionic Nature	Non-Ionic	-
Solubility	Dispersible in water; Insoluble in oils	-
Flash Point	> 100°C (> 212°F)	ASTM D93
Storage Temperature	5°C to 40°C (41°F to 104°F)	-
Shelf Life	12 months in original, unopened container	-
Key Silicone Components	Polydimethylsiloxane, Hydrophobic Silica	-
VOC Content	< 1%	EPA Method 24
APEO-Free	Yes	-

 

Primary Application Scenarios

SILENTGUARD™ AF-5500 excels in controlling foam in a vast array of industrial processes:

Pulp & Paper Industry:

Pulping (Kraft, Sulfite, Recycled fiber)

Stock preparation and screening

Paper machine white water systems

Effluent treatment

Coating kitchens and color preparation

Water Treatment:

Municipal and industrial wastewater treatment (aeration basins, equalization tanks, clarifiers)

Reverse Osmosis (RO) pre-treatment

Membrane bioreactors (MBRs)

Flue Gas Desulfurization (FGD) scrubbers

Coatings, Paints & Inks:

Water-based architectural paints

Industrial coatings

Printing inks (flexographic, gravure)

Lacquers and varnishes

Formulation, production, and application stages

Adhesives & Sealants:

Water-based adhesives (PVA, acrylics)

Pressure-sensitive adhesives (PSA)

Sealant production and application

Chemical Processing:

Fermentation broths (antibiotics, enzymes, yeast, citric acid)

Distillation and evaporation processes

Acid cleaning baths (e.g., metal pickling)

Latex and polymer emulsion production

Detergent and surfactant manufacturing

Textile Processing:

Dyeing baths (jet, beck, jig)

Sizing and desizing

Scouring and bleaching

Finishing baths

Food Processing (Subject to specific regulatory approval - consult supplier):

Fermentation processes (breweries, wineries, bakeries)

Sugar processing (evaporation, crystallization)

Potato processing

Fruit and vegetable washing

Oil & Gas:

Drilling muds (water-based)

Produced water treatment

Gas scrubbing systems

Recommended Dosage

Typical dosage ranges from 50 ppm to 500 ppm based on the severity of the foaming problem and the specific process.

Initial Trial: Always conduct laboratory or small-scale trials under process conditions to determine the optimal dosage for maximum efficiency and cost-effectiveness.

Addition Points: Can be added neat or diluted (with water or the process stream) directly to the point of foam generation (e.g., pump suction, top of tank, before a weir). Continuous feed is often preferred for persistent foam problems.

Packaging & Handling

Standard Packaging: 25 kg HDPE pails, 200 kg HDPE drums, 1000 kg IBC totes. Custom packaging available upon request.

Handling: Use standard industrial chemical handling procedures. Avoid freezing or prolonged exposure to high temperatures (>40°C). Agitate gently before use if separation occurs during storage. Wear appropriate PPE (gloves, safety glasses).

Storage: Store in a cool, dry, well-ventilated place in original tightly sealed containers away from direct sunlight and heat sources.

All of data, suggestions, and proposals presented here are based on our current knowledge and experience in raw materials and application technologies, which do not exclude the responsibility of users to scrutinize the quality of all received products. Because we are out of control of quality in users’ raw materials, production and application methods, service conditions as well as local standards, our suggestions and proposals do not imply any guarantee and promise for end product’s quality. The users should be responsible for formulation adjustment according to real conditions to meet project quality requirements.