Energy savings plus mechanical reinforcement and rheology control

Waterborne Vinyl Acetate / Starch Adhesive for Bonding Vinyl Wall Covering

Adhesives Formulation

Applicable Type

Waterborne Adhesives

Applicable Base Polymer

Polyvinyl Acetate Emulsions & Derivatives (PVAc) , Starches

Applicable Industrial Sectors

Wallcoverings

Applicable Base Polymer Properties

Waterborne vinyl acetate adhesives for packaging applications have relatively good flexibility and low temperature properties and excellent adhesion to paper. These adhesives provide a low to medium performance relatively inexpensive adhesive that dries quickly. A typical formulation consists of VAE latex, filler (if greater viscosity is desired), plasticizer (for improved flexibility), and water.

Typical Formulation Ingredients

Ingredient

Parts by weight

Polyvinyl acetate latex emulsion (Gelva S-55R, Solutia)

xxxx

Glycerin

xxxx

ASP-100 aluminum silicate (Englehard)

xxx

Carboxy methylcellulose (Dow Chemical)

xxx

Starch (thin boiling)

xxx

Water

xxxx

Preservative (Dowicide A, Dow Chemical)

xxx

(Source: Adhesives Formulary Handbook, NIIR Board, Asia Pacific Business Press, Inc., 2010, p. 4.)

Typical Properties

Properties

Total solids content, %

xxxx

Brookfield viscosity, cps

xxxxxx

Processing

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Resulting Properties

This formulation has excellent wet tack in which the adhesive bond remains firm immediately after the bond has been established. It also has a controlled degree of penetration. The formulation above tends to have thixotropic properties that eliminate stringiness and provide good consistency.

Tips and Tricks

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