Energy savings plus mechanical reinforcement and rheology control

Vinyl Acetate Acrylic Flexible Packaging Adhesive for Difficult Substrates (A) by Dow

Adhesives Formulation | Supplied by Dow Corning

Applicable Type

Waterborne Adhesives

Applicable Base Polymer

Vinyl Acrylics & Vinyl Acrylic Copolymers (VAC) , Vinyl Acetate Ethylene Copolymers (VAE)

Applicable Industrial Sectors

Papers & Packagings , Bags & sacks , Carton closure (packaging user)

Applicable Base Polymer Properties

Vinyl acetate acrylic copolymer emulsion is designed for use in formulating high performance adhesives for the packaging industry. It provides a high level of adhesion to a variety of difficult-to-bond surfaces including polyolefin films. These copolymers deliver superior adhesion without the need for chlorinated solvents.

Typical Formulation Ingredients

Phase

Ingredient

Parts by weight

Vinyl acetate acrylic copolymer (Rovace™ RP-2931, Dow Chemical)

Acrylic emulsion (Rhoplex™ AC-264, Dow Chemical)

Plasticizer – Dibenzoate (Benzoflex™ 50, Eastman Chemical)

Tackifier (Aquatac™ 6085 or Aquatac™ 6025, Kraton)

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Property Enhancement

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Typical Properties

Properties

Viscosity at 22°C, cps

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Approximate solids content, %

Clarity

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Water resistance

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Glass transition temperature, °C

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Adhesion, gms/in Aluminum foil

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Adhesion, gms/in Polypropylene (treated)

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Adhesion, gms/in Polypropylene (untreated)

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Processing

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Resulting Properties

The low viscosity of the water emulsion and its fast setting capability provide an excellent adhesive for sealing of corrugated boxes, cartons, and paper bags. The table above provides a formulation for an adhesive that will have a fast set and good penetration into the porous substrates. The latex adhesive dries to a somewhat rubbery film by virtue of the flexible nature of the copolymer. The adhesive has good resistance to water and good adhesion to most substrates.

Tips and Tricks

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