24937-78-8 Usage
Description
Ethylene-vinyl acetate copolymer, also known as EVA copolymer or poly(ethylene-co-vinyl acetate) (PEVA), is a flame-retardant material with good mechanical and physical properties. It is characterized by its good impact resistance, stress crack resistance, softness, high elasticity, puncture resistance, chemical stability, good electrical properties, good biocompatibility, and low density. It is also compatible with fillers and flame retardant agents, making it a versatile material for various applications.
Uses
Used in Plastic Products Industry:
Ethylene-vinyl acetate copolymer is used as a raw material for manufacturing plastic products due to its good impact resistance, stress crack resistance, softness, high elasticity, puncture resistance, and chemical stability.
Used in Wire and Cable Industry:
As an insulating material, Ethylene-vinyl acetate copolymer is utilized in the wire and cable industry for its flame-retardant properties and good mechanical and physical properties.
Used in Automotive Industry:
Ethylene-vinyl acetate copolymer is used as flexible tubing, color concentrates, gaskets, and molded parts for automobiles, taking advantage of its flexibility, durability, and resistance to various environmental factors.
Used in Optical Industry:
The copolymer is used in the production of plastic lenses and pumps, benefiting from its translucent film properties and compatibility with other materials.
Used in Adhesives and Coatings Industry:
Ethylene-vinyl acetate copolymer serves as an elastomer to improve the adhesion properties of hot-melt and pressure-sensitive adhesives, as well as for conversion coatings and thermoplastics, due to its compatibility with various additives and flame retardants.
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.
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.
Safety
Ethylene vinyl acetate is mainly used in topical pharmaceutical
applications as a membrane or film backing. Generally it is regarded
as a relatively nontoxic and nonirritant excipient.
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.
Check Digit Verification of cas no
The CAS Registry Mumber 24937-78-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,4,9,3 and 7 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 24937-78:
(7*2)+(6*4)+(5*9)+(4*3)+(3*7)+(2*7)+(1*8)=138
138 % 10 = 8
So 24937-78-8 is a valid CAS Registry Number.
InChI:InChI=1/C4H6O2.C2H4/c1-2-3-4(5)6;1-2/h2H,1,3H2,(H,5,6);1-2H2