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Polyvinyl Alcohol (PVA)

A water soluble synthetic resin made by hydrolysis of polyvinyl acetate.

Viscosity: Variable, depending on the degree of hydrolysis; ranges from 400 to 40,000 cPs.
Sp. Gr.: 1.2 to 1.3

Remarks: A base material for water-resistant laminating adhesives. Used in adhesives, in binders for leather, cloth and paper, in grease proof paper, as a paper size, as an emulsifying agent, as an emulsion stabilizer and thickener, for temporary protective coatings.

Pump Notes: Cast iron construction is satisfactory. Buna n elastomers are generally acceptable. A mechanical shaft seal may be used depending on viscosity.