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Kuraray Poval™ 5-74

Polymer Name: Polyvinyl Alcohol (PVOH)
Functions: Resin, Binder, Coupling Agent
Chemical Family: Polyvinyl Alcohols & Esters, Vinyls, Vinylics & Vinyl Derivatives

KURARAY POVAL™ 5-74 by Kuraray is a biodegradable and recyclable polyvinyl alcohol (PVOH) having varying degree of polymerization and hydrolysis. It is a water-soluble polymer manufactured by alcoholysis of polyvinyl acetate. It exhibits excellent film forming characteristics, high tensile strength and elasticity, as well as resistance against organic solvents and dispersing power. It is notable for its good bonding strength and pigment binding capacity because PVAs have such good cohesion and good adhesion to fibers, fillers as well as pigments. It is used in a similar manner as natural products such as casein as well as starch and its degraded derivatives (for example dextrin) as raw material to produce aqueous adhesive solution. For the modification of aqueous adhesives its aqueous solution can be added to polymer emulsions already stabilized with polyvinyl alcohol which affects the extension of the open time, increase of the setting speed and influence on the rheology. KURARAY POVAL™ 5-74 is used in producing silicon base paper that are further used as release paper for PSA labels and in remoistenable adhesives which are employed mainly in the paper processing industry and films applications.

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