Energy savings plus mechanical reinforcement and rheology control

Waterborne PVAc Roof Coating and Adhesive

Adhesives Formulation

Applicable Type

Waterborne Adhesives

Applicable Base Polymer

Polyvinyl Acetate Emulsions & Derivatives (PVAc)

Applicable Industrial Sectors

Buildings & constructions

Applicable Base Polymer Properties

Polyvinyl acetate adhesives and sealants have the same base latex resin that is used in wood glues. These adhesives provide a low performance, inexpensive coating that dries to a hard, rigid seal. A typical adhesive formulation consists of polyvinyl acetate latex, filler, plasticizer (for improved flexibility), and water. Since these products set by evaporation, their shrinkage is greater than solventless systems such as polyurethane.

Typical Formulation Ingredients

Ingredient

Parts by weight

PVAc latex copolymer (Pounds / 100 Gallons)

xxx

Water (Pounds / 100 Gallons)

xxx

Wetting agents and dispersants (Pounds / 100 Gallons)

Mildewcide (Pounds / 100 Gallons)

xxx

Methyl cellulose (3% solution) (Pounds / 100 Gallons)

xxx

Antifoaming agent (Pounds / 100 Gallons)

Titanium dioxide (Pounds / 100 Gallons)

Whiting (Pounds / 100 Gallons)

xxx

Mineral fiber (Pounds / 100 Gallons)

Processing

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Resulting Properties

Polyvinyl acetate latex emulsions have been used to make mastic compounds as a base for constructing and repairing roofs and for bonding aggregate on built-up roofs. As a mastic, a latex roof coating is generally applied by towel and reinforced with glass cloth or felt. A typical latex roof coating is shown in the table above.

Tips and Tricks

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