Energy savings plus mechanical reinforcement and rheology control

Vinyl Acetate Acrylic Copolymer Waterborne Packaging Adhesive (A)

Adhesives Formulation

Applicable Type

Waterborne Adhesives

Applicable Base Polymer

Vinyl Acrylics & Vinyl Acrylic Copolymers (VAC)

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

Ingredient

Parts by weight

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

xxx

Polyvinyl alcohol

PVA stabilized copolymer emulsion (Rhoplex R-498, Dow Chemical)

Plasticizer – Dibenzoate (Benzoflex 50, Eastman Chemical)

Filler – Clay (ASP-400)

(Source: “Rovace HP-2931”, Dow Chemical)

Typical Properties

Properties

Viscosity at 22°C, cps

xxxxxxxxxxx

Approximate solids content, %

Clarity

xxxxx

Water resistance

xxxx

Glass transition temperature, °C

xxx

Adhesion,gms/in:

• Aluminum foil

xxxxxxxxxxxxxxxxx

• Polypropylene (treated)

xxx

• Polypropylene (untreated)

xxx

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 provide 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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