Vinyl acetate ethylene copolymer dispersions are synthesized via emulsion polymerization from the monomers vinyl acetate and ethylene. These polymers are formed in the presence of water and the product is a milk-like latex emulsions. Vinyl acetate is a hard monomer that when polymerized forms poly (vinyl acetate) and is widely used in adhesive applications. The incorporation of ethylene as a comonomer effectively lowers the glass transition temperature of the final VAE copolymer without the incorporation of plasticizers which can migrate. The ethylene comonomer reduces water sensitivity (hydrophobicity) and enhances flexibility, toughness, adhesion and durability. VAE dispersions provide environmental advantages, since they exhibit good film-forming properties without coalescing agents, for example in low VOC paint and coatings.
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VAE dispersions can be spray dried into powders. These VAE polymer powders are redispersible in water and the properties are unchanged.
Vinyl Acetate Ethylene (VAE) copolymers are water-based emulsions that offer considerable performance advantages over Polyvinyl Acetate (PVA) homopolymer adhesive glue due to the ability to alter their glass transition temperature (Tg°C) through the incorporation of ethylene monomer. As ethylene content increases, glass transition temperature decreases.
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VAE adhesives offer comparable machining properties to PVAs with the added benefit of significantly improved adhesion to non-porous surfaces, such as vinyl, aluminum, etc. VAE glue also exhibits better flexibility, water resistance, and cost-performance while offering superior adhesive binding properties along with more user-friendly compounding characteristics.
Flexible packaging adhesives constitute the largest area of application for VAEs. Included in this market segment are case and carton sealing, bonding of coated board, the manufacture of paper bags, etc. Laminating applications represent another substantial use for VAE adhesive glue. Because of their flexibility, moisture resistance, and superior substrate adhesion, VAEs also find wide use in adhesives for furniture manufacture, bookbinding, textiles, and do-it-yourself projects. VAEs are also popular in the fabrication of non-woven products, such as toweling and diapers, and in the backing of fabrics and carpeting.
U.S. Adhesives manufactures numerous types of VAE emulsion glue—a few of our most popular are listed below:
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