Ethylene Vinyl Acetate Copolymer Emulsion In Water

Water based adhesives for.

Ethylene vinyl acetate copolymer emulsion in water.

In contrast to the emulsion polymerization of vinyl acetate the syntheses of vinyl acetate ethylene copolymers utilize high pressure reactions ranging from 20 to 60 bar or even more. In the general formulation it can be combined with plasticizers solvents thickening agents extenders etc. However pvac emulsions are also widely used in many industrial and consumer end use applications. Generally vae copolymer emulsions can be used without additives or modifiers and ideally combine low environmental impact with effective performance in paints.

It has been developed as a powerful base adhesive offering the following unique characteristics. Ethylene vinyl acetate emulsion. Adhesive compositions consisting essentially of an aqueous emulsion of vinyl acetate ethylene copolymer prepared in the presence of protective colloid comprising fully hydrolyzed vinyl alcohol copolymer containing methyl methacrylate have improved water resistance. 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.

Vinyl acetate ethylene vae is a combination of ethylene and vinyl acetate two monomers possessing special properties as e g. Vae copolymers form the basis for engineering different properties in the individual end application. Series is a product line of water based emulsions for various forms of polymer compositions as typified by ethylene vinyl acetate copolymer resins ternary copolymer resins composed of ethylene vinyl acetate and vinyl chloride and acrylic ethylenevinyl acetate copolymer resins. There are three different types of eva copolymer which differ in the vinyl acetate va content and the way the materials are used.

Ethylene vinyl acetate eva also known as poly ethylene vinyl acetate peva is the copolymer of ethylene and vinyl acetate the weight percent of vinyl acetate usually varies from 10 to 40 with the remainder being ethylene. Vinyl acetate ethylene copolymer emulsion vae emulsion is a copolymer of vinyl acetate and ethylene. Strong initial adhesion high wet tack good creep resistance water alkali resistance improved thickening response and safe operation. Polyvinyl acetate is synthesized by the emulsion polymerization of vinyl acetate monomer vam.

Polymerization leads to vae copolymers. Vinyl acetate ethylene vae emulsions are based on the copolymerization of vinyl acetate and ethylene in which the vinyl acetate content can range between 60 and 95 percent and the ethylene content ranges between 5 and 40 percent of the total formulation.