⟡ EVA Copolymers / Thermoplastic Polymers / Adhesive Materials
Poly(ethylene/vinyl acetate) [60:40 (wt)]
Poly(ethylene-co-vinyl acetate) (EVA) [60:40 (wt)] is a flexible thermoplastic copolymer composed of approximately 60 wt% ethylene and 40 wt% vinyl acetate. The elevated vinyl acetate content increases softness, flexibility, adhesion, and compatibility compared to lower vinyl acetate EVA grades, making this material particularly useful for adhesives, coatings, films, and polymer modification applications.
This EVA copolymer exhibits reduced crystallinity, improved elasticity, and enhanced low-temperature performance while maintaining good processability in melt-based systems. The material also contains approximately 540 ppm BHT antioxidant to support thermal and oxidative stability during processing and storage.
Key Features & Benefits
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60:40 ethylene-to-vinyl acetate composition: provides increased flexibility and softness versus lower VA EVA grades
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High vinyl acetate content: improves adhesion, compatibility, and elastomeric behavior
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Thermoplastic EVA copolymer: suitable for melt processing, blending, and formulation development
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Low crystallinity: contributes to flexibility and low-temperature toughness
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Good adhesive characteristics: useful in hot-melt adhesives and coating systems
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Contains ~540 ppm BHT antioxidant: supports thermal stability during processing
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Flexible polymer modifier: helps improve impact resistance and elasticity in polymer blends
Product Details
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Product name: Poly(ethylene/vinyl acetate) [60:40 (wt)]
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Common abbreviation: EVA
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CAS number: 24937-78-8
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Composition: ~60 wt% ethylene / ~40 wt% vinyl acetate
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Polymer type: Thermoplastic copolymer
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Additive: ~540 ppm BHT antioxidant
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Function: Adhesive polymer, flexible modifier, film and coating material
Typical Applications
Hot-melt adhesives
EVA copolymers are widely used in hot-melt adhesive formulations due to their flexibility, adhesion performance, and compatibility with tackifiers, waxes, and resins.
Flexible coatings and films
The higher vinyl acetate content improves softness and flexibility in film and coating systems where low-temperature performance and elasticity are important.
Polymer modification
Used to improve toughness, impact resistance, and flexibility in polymer blends and composite materials.
Sealants and pressure-sensitive systems
EVA is incorporated into flexible sealants and pressure-sensitive adhesive formulations requiring elasticity and cohesive strength.
Research and formulation development
Suitable for polymer research involving thermoplastic elastomers, flexible copolymer systems, and compatibility studies.
Functional Role
This EVA copolymer functions as a flexible thermoplastic binder and modifier. Ethylene segments contribute structural stability, while vinyl acetate functionality reduces crystallinity and enhances flexibility, adhesion, and compatibility with other formulation components.
The 60:40 composition produces a softer and more elastomeric material compared to lower vinyl acetate EVA grades, making it useful in applications requiring flexibility, compliance, and adhesive performance.
Why Vinyl Acetate Content Matters
Vinyl acetate concentration strongly influences EVA behavior. As vinyl acetate content increases, EVA generally becomes softer, more flexible, and more adhesive while exhibiting lower crystallinity and stiffness. At approximately 40 wt% vinyl acetate, this grade offers a balance of thermoplastic processability and elastomeric performance suitable for coatings, adhesives, and flexible material systems.
For a broader overview of how polymer composition and molecular characteristics influence performance, see our polymer molecular weight selection guide.
Handling & Storage
- Store in a cool, dry environment away from excessive heat.
- Keep container tightly sealed when not in use.
- Avoid prolonged exposure to oxidizing conditions.
- Consult the SDS for detailed handling and safety information.
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FAQ
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What is EVA 60:40 used for?
EVA 60:40 is commonly used in hot-melt adhesives, flexible coatings, polymer modification, sealants, films, and elastomeric material systems.
What does 60:40 mean in EVA copolymers?
The ratio refers to the approximate weight percentage of ethylene to vinyl acetate in the copolymer composition.
How does higher vinyl acetate content affect EVA?
Higher vinyl acetate levels generally increase flexibility, softness, adhesion, and compatibility while lowering crystallinity and stiffness.
Is EVA considered a thermoplastic elastomer?
High vinyl acetate EVA grades can exhibit elastomeric behavior while still maintaining thermoplastic processing characteristics.
Why is BHT included in EVA formulations?
BHT acts as an antioxidant to help improve thermal and oxidative stability during processing and storage.
