Vinyl acetate-vinyl alcohol copolymer

Vinyl acetate-vinyl alcohol copolymer (CAS 25213-24-5) is a partially hydrolyzed polyvinyl acetate that bridges the performance gap between fully hydrolyzed polyvinyl alcohol and standard polyvinyl acetate resins.

By controlling the degree of hydrolysis, manufacturers can tune water solubility, adhesion strength, and film flexibility to meet specific processing requirements across multiple industrial sectors.

In textile sizing, the copolymer coats warp yarns to reduce breakage during high-speed weaving, improving throughput and fabric quality. Paper and board manufacturers use it as a surface sizing agent.

It acts as a binder to enhance printability, surface strength, and ink holdout. In construction adhesives and tile-setting formulations, it contributes to bond strength and open time control on porous substrates.

Packaging and printing applications rely on it as a film-forming binder in water-based coatings and laminating adhesives. Controlled rheology and substrate wetting are critical to coating uniformity.

Vinyl acetate-vinyl alcohol copolymer is supplied as a white to off-white powder or granules, with solution grades available at defined solid content levels for various industrial processes.

Key specification parameters include degree of hydrolysis and viscosity grade, which together define suitability for a given application. Technical and industrial grades are standard for most uses.

Buyers should confirm hydrolysis degree ranges with suppliers when substituting between grades. This ensures the material meets the specific chemical and physical requirements of the final product formulation.