Where Does Ethylene Vinyl Acetate Come From

47 but elevated temperature and presence of some additives for example high amounts of clay cause the production of pungent acetic acid odor which is a product of thermal degradation of ethylene vinyl acetate copolymer.

Where does ethylene vinyl acetate come from. 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. Poly vinyl acetate was discovered in germany in 1912 by fritz klatte. The global chemicals industry faces economic and environmental pressures that s why many of our suppliers like ethylene vinyl acetate factory are always. The monomer vinyl acetate was first produced on an industrial scale by the addition of acetic acid to acetylene with a mercury i salt but it is now primarily made by palladium catalyzed oxidative addition of acetic acid to ethylene.

Vam is usually produced by the catalysed vapour phase reaction of acetic acid with ethylene and oxygen in a fixed bed tubular reactor using a supported noble metal catalyst. Elvax 40p was obtained from the du pont company wilmington de. Inhalation does not pose a threat unless you actually work in a processing plant. Before proceeding with drug incorporation evac must be washed in absolute ethyl alcohol to extract its inflammatory impurities mainly the antioxidant butylhydroxytoluene bht.

Pva is a vinyl polymer. Ethylene vinyl acetate eva is not hazardous by ingestion unless you eat an object made of eva that s big enough to cause choking or other problems in which case it would pose the same hazards as any other plastic object. Ethylene vinyl acetate copolymer does not have an acid odor if it is not thermally degraded. Eva or ethylene vinyl acetate sometimes known as peva poly ethylene vinyl acetate is a polymer based material consisting of ethylene and vinyl acetate merged together a copolymer.

Ethylene is now the preferred feedstock for vam vinyl acetate monomer largely replacing the earlier acetylene based process. If the material is processed at high. The ethylene vinyl acetate copolymer evac 40 vinyl acetate by weight. There are three different types of eva copolymer which differ in the vinyl acetate va content and the way the materials are used.