Ultra fine calcium carbonate Omyabond 120

Waterborne, Low Cost PVAc Adhesive for Bonding Wallboard to Studs

Adhesives Formulation

Applicable Type

Waterborne Adhesives

Applicable Base Polymer

Vinyl Acetate Ethylene Copolymers (VAE)

Applicable Industrial Sectors

General caulking & sealing

Applicable Base Polymer Properties

Waterborne vinyl acetate adhesives for construction applications have relatively good flexibility and low temperature properties (by virtue of added plasticizers) and excellent adhesion to wood and 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

Vinyl acetate latex emulsion (Gelva S-55H, Solutia)

xxxx

Dibutyl phthalate plasticizer

xxx

Starch (Pearl)

xxx

Polyvinyl alcohol (fully hydrolyzed)

xxx

Aluminum silicate (ASP-400)

xxxx

Water

xxxx

Defoamer (Lanolubric No. 2, E.F. Haughton & Co.)

(Source: Adhesives Formulary Handbook, NIIR Board, Asia Pacific Business Press, Inc., 2010, p. 11.)

Typical Properties

Properties

Brookfield viscosity, cps

xxxxxx

Total solids content, % by weight

Wood bond shear strength (maple), psi

xxxxxxxxxxxxxx

Full strength development

xxxxxxxxx

Initial bond development

xxxxxxx

Processing

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Resulting Properties

This adhesive formulation has improved wet tack in which the adhesive joint remains firm immediately after the bond has been established. Penetration can be controlled by the concentration of particulate additives. This adhesive formulation tends to have thixotropic properties that eliminate stringiness and provide good consistency. The adhesive also provides high solids content to lower cost and faster drying times.

Tips and Tricks

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