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Ethylene-Vinyl Acetate (EVA) copolymer is a thermoplastic polymer produced by the copolymerization of ethylene and vinyl acetate monomers.
Ethylene-Vinyl Acetate (EVA) copolymer is a highly versatile material known for its rubber-like softness, flexibility, toughness, and chemical resistance.
CAS No.24937-78-8
Chemical Name:Ethylene-vinyl acetate copolymer
CBNumber:CB0356004
Molecular Formula:(C4H6O2.C2H4)x
Formula Weight:114.14
MOL File:24937-78-8.mol
Synonyms:ETHYLENE/VINYL ACETATE COPOLYMER 20, ETHYLENE/VINYL ACETATE COPOLYMER 25, ETHYLENE-VINYL ACETATE COPOLYMER RESIN, ETHYLENE-VINYL ACETATE LATEX, ETHYLENE-VINYL ACETATE MOLDING RESIN, ETHYLENE-VINYL ACETATE RESIN, Aceticacidethenylester,polymerwithethene, 3-Butenoic acid - ethylene (1:1)
Description
Ethylene-vinyl acetate copolymer has good impact resistance and stress crack resistance, softness, high elasticity, puncture resistance and chemical stability, good electrical properties, good biocompatibility, and low density, and is compatible with fillers, flame retardants agents have good compatibility.
Ethylene-vinyl acetate copolymer is mainly used for plastic products.
Physical properties
Ethylene vinyl acetate is available as white waxy solids in pellet or powder form.
Films are translucent.
Uses
Flexible tubing, color concentrates, gaskets and molded parts for autos, plastic lenses and pumps.
Primary Applications
Footwear & Sports Equipment: Widely processed into cross-linked EVA foam for shoe midsoles (running shoes), padding, and protective gear due to its cushioning and shock-absorption qualities.
Adhesives & Sealants: Used as the base resin in industrial hot-melt adhesive sticks, packaging glues, and bookbinding adhesives.
Solar Energy: Acts as the primary encapsulation material for photovoltaic (PV) modules to protect solar cells from moisture and physical impact.
Cosmetics & Personal Care: Functions as a film former, emulsion stabilizer, and binder in various cosmetic formulations.
Medical & Industrial: Used in flexible tubing, medical bags, cable compounds, and sound barrier sheets.
Pharmaceutical Applications
Ethylene vinyl acetate copolymers are used as membranes and backings in laminated transdermal drug delivery systems.
They can also be incorporated as components in backings in transdermal systems.
Ethylene vinyl acetate copolymers have been shown to be an effective matrix and membrane for the controlled delivery of atenolol triprolidine, and furosemide.
The system for the controlled release of atenolol can be further developed using ethylene vinyl acetate copolymers and plasticizers.
Definition
An elastomer used to improve adhesion properties of hot-melt and pressure-sensitive adhesives, as well as for conversion coatings and thermoplastics.
Production Methods
Various molecular weights of random ethylene vinyl acetate copolymers can be obtained by high-pressure radical polymerization, bulk continuous polymerization, or solution polymerization.
General Description
Poly(ethylene-co-vinyl acetate) (PEVA) is a flame-retardant material with good mechanical and physical properties.
Ethylene-vinyl acetate copolymer is majorly used as an insulating material in wire and cable industry.
Properties
Melting point: 75 °C
Boiling point: <200 °C
Density: 0.948 g/mL at 25 °C
Refractive index: 1.476
Refractive index: 1.482
Refractive index: 1.485
Flash point: 260 °C
Storage temp.: 2-8°C, sealed storage, away from moisture
Solubility: toluene, THF, and MEK: soluble
Form: pellets
Color: White to off-white
Stability: Stable. Combustible. Incompatible with strong oxidizing agents, bases.
Cosmetics Ingredients Functions: EMULSION STABILISING, BINDING, FILM FORMING
InChI: 1S/C4H6O2.C2H4/c1-2-3-4(5)6;1-2/h2H,1,3H2,(H,5,6);1-2H2
InChIKey: DQXBYHZEEUGOBF-UHFFFAOYSA-N
Safety
Ethylene vinyl acetate is mainly used in topical pharmaceutical applications as a membrane or film backing.
Generally Ethylene-vinyl acetate copolymer is regarded as a relatively nontoxic and nonirritant excipient.
Solubility in organics
Acetone, benzene, chloroform, dioxane, DMF, MEK, methylene chloride, THF, toluene, xylene
Benzene, chloroform, toluene, xylene
Benzene, dioxane, MEK, methylene chloride, THF, toluene, xylene
Benzene, methylene chloride, THF, toluene, xylene
storage
Ethylene vinyl acetate copolymers are stable under normal conditions and should be stored in a cool, dry place. Films of ethylene vinyl acetate copolymers should be stored at 0–30°C and less than 75% relative humidity.
Incompatibilities
Ethylene vinyl acetate is incompatible with strong oxidizing agents and bases.
Regulatory Status
Included in the FDA Inactive Ingredients Database (intrauterine suppository; ophthalmic preparations; periodontal film; transdermal film).
Included in nonparenteral medicines licensed in the UK.
