Airflex 4500 terpolymers of vinyl chloride, ethylene and a third monomer Air Products Ethylene copolymers - emulsions (VAE, EVC) Airflex EVCL emulsions are terpolymers of vinyl chloride, ethylene and a third monomer, which imparts amide functionality to the polymers. Airflex 4500 emulsion is the softest in the EVCL series with the highest ethylene content. Because their major constituent is vinyl chloride, they can be used in fire-retardant adhesives. Airflex EVCL emulsions show good adhesion to metals, some plastic films and foams. The emulsions provide clear, tough films that have outstanding water and alkali resistance. Airflex 4500 emulsions have the best film formation properties in the series due to their low Tg. Good film formation and a hydrophobic polymer backbone promote moisture vapor barrier properties. Being a copolymer with ethylene, they have low heat-seal temperatures with very good blocking resistance. Compunding Airflex EVCL series emulsions are compatible with a wide variety of compounding ingredients. Their anionic stabilization systems are effective at a high pH. Airflex EVCL emulsions will accept high levels of clay, calcium carbonate or other fillers. However, they have poor tolerance toward trivalent ions. Airflex EVCL emulsions are compatible with most common plasticizers. Acceptable classes of plasticizers are butyl benzyl phthalate, benzoate esters, phosphate esters and sulfonamides. Airflex EVCL emulsions can be thickened with Hydroxyethyl cellulose, inverse acrylic emulsion thickeners, associative thickeners and watersoluble acrylics. The emulsions contain chlorine in the polymer backbone and can be used to create fire-retardant adhesives and lagging cements with good adhesion to a variety of surfaces. Airflex EVCL emulsions can be crosslinked through the amide functionality on the polymers. Condensation reactions with additives such as urea formaldehyde resins, phenol formaldehyde resins and melamine formaldehyde resins are all possible. Crosslinking can improve the heat and solvent-resistance properties of Airflex EVCL series emulsions. Applications: Due to the presence of chlorine in the polymer backbone, Airflex EVCL series emulsions find use in fire-retardant adhesives and coatings. Their excellent MVTR barrier properties make them an ideal starting point for moisture vapor barrier coatings. They have good nonblocking characteristics for their Tg, making the emulsions useful in nonblock, heat-sealable coatings. Terpolymers of vinyl chloride, ethylene and a third monomer, which imparts amide functionality to the polymers. Very soft with a high ethylene content. Can be used in fire-retardant adhesives. Shows good adhesion to metals, some plastic films and foams. Provides clear, tough films that have outstanding water and alkali resistance. No dry tack and fexible films. Moisture vapor barrier properties, low heat-seal temperatures with very good blocking resistance.