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Adhesives Ingredients
The material selection platform
Adhesives Ingredients

High Strength, Clear Waterborne Acrylic Sealant by Evonik

Adhesives Formulation

Applicable Base Polymer
Applicable Industrial Sectors

Applicable Base Polymer Properties

Acrylic emulsion based sealants have taken over many of the applications where a higher movement capability is required than for polyvinyl acetate sealants. Acrylic sealants can also be used outdoors, whereas the polyvinyl acetate sealants have inferior exterior durability. Acrylic emulsion polymers are ideally suited to the formulation of medium performance sealants. There is a significant variation in the types of base polymer emulsions that are available, and these emulsions are easy to formulate. This gives the formulator wide latitude for compounding to meet specific requirements. Sealants based on acrylic emulsions provide tough, elastic systems, with high adhesion and durability, and they are very environmentally friendly and easy to use.

Typical Formulation Ingredients

Phase
Ingredient
Parts by weight
Acrylic latex (UCAR 9192, Dow Chemical) 
xxxxx 
Surfactant (Tergitol NP-4, Dow Chemical) 
xxxx 
Defoamer (Foamaster NXZ, BASF) 
xxxx 
Propylene glycol 
xxxx 
Coalescing agent (UCAR Filmer IBT, Dow Chemical) 
xxxx 
Mineral spirits 
xxxx 
UV stabilizer (Tinuvin 1130, BASF) 
xxxx 
UV stabilizer (Tinuvin 292, BASF) 
xxxx 
Fumed silica (Aerosil 200, Evonik) 
xxxx 
Ammonium hydroxide (28%) 
xxxx 

Typical Properties

Properties
Tensile strength, MPa 
xxxx 
Elongation, % 
xxxx 
Clarity 
xxxxxxxxx 

Processing

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Resulting Properties

A broad product line with a wide range of properties can be developed by only varying the pigment-to-binder ratio. A typical formulation for standard acrylic latex sealants is given above. It provides a high solids, rapid drying, paintable, and low cost formulation for gap filling applications. This specific formulation is noted by its high strength and clarity due mainly to the fumed silica filler.

(Source: Evonik)

Tips and Tricks

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