Energy savings plus mechanical reinforcement and rheology control

Flexible 2K Epoxy Adhesive for Bonding Damp Concrete (A) by Evonik

Adhesives Formulation | Supplied by Evonik

Applicable Type

Reactive Adhesives

Applicable Base Polymer

Epoxies (EP)

Applicable Industrial Sectors

Buildings & constructions

Applicable Base Polymer Properties

Because of their thermosetting molecular structure, epoxy adhesives exhibit excellent tensile-shear strength but poor flexibility and peel strength unless modified with a more resilient polymer. Ancarez 2364 flexibilizer is a moderate viscosity acrylate functional urethane resin. It is stable over long periods of time when mixed with epoxy resin and completely reacted when cured with amine curing agents.

The Ancarez 2364 flexibilizer use level can be varied to meet flexibility and toughness requirements in many applications. The moderate viscosity and epoxy compatibility make it especially useful in coatings and civil engineering applications such as resilient flooring, crack bridging, bridge decks and secondary containment membranes.

Typical Formulation Ingredients

Phase

Ingredient

Parts by weight

Epoxy resin (EEW=190)

xxxx

Diluent (Epodil® 740, Evonik)

xxxx

Flexibilizer (Ancarez® 2364, Evonik)

xxxx

Curing agent (Ancamine® 2384, Evonik)

xxxxx

Typical Properties

Properties

Gel time, min, 150 gm mass

Mix viscosity, cps

xxxx

Strength, psi, at cure temperature of 22°C

xxx

Strength, psi, at cure temperature of 4°C

xxx

Failure mode, at cure temperature of 22°C

xxxxxxxxxxxxx

Failure mode, at cure temperature of 4°C

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Processing

Resulting Properties

Ancarez 2364 flexibilizer formulations exhibit good adhesion to concrete under ambient and low temperature cure conditions. Unfilled flexibilized formulations were tested at room temperature for adhesion to damp concrete after curing for seven days at both 72°F and 40°F. Results of the dolly pull-off test (ASTM 4541), including adhesive strength and mode of failure, are shown above.

Tips and Tricks

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