Description

Poly(Vinyl Alcohol-Co-Ethylene) is a water-soluble synthetic copolymer that combines the film-forming and adhesive properties of polyvinyl alcohol with the flexibility and toughness imparted by ethylene units. This material is valued for its excellent barrier properties against gases like oxygen and its ability to form strong, clear films. It is essential for manufacturers in the packaging, textile, paper, and adhesive industries seeking to enhance product performance with a versatile polymeric additive. The compound is also identified by the CAS registry number 25067-34-9.

Application

• Barrier Coatings: Used in high-performance packaging films to provide excellent oxygen and aroma barrier properties, extending the shelf life of food products.
• Paper Sizing & Coatings: Improves strength, printability, and oil/grease resistance of paper and paperboard.
• Textile Finishing: Serves as a warp sizing agent to protect yarns during weaving and as a binder for non-woven fabrics.
• Adhesives & Binders: A key component in water-based adhesives, pigment binders for paints, and ceramic binders due to its strong adhesion and film-forming characteristics.
• Pharmaceutical & Personal Care: Employed as a film-forming agent in tablet coatings and as a thickener or stabilizer in cosmetic formulations.
• Photographic Films: Acts as a subbing layer to improve the adhesion of photographic emulsions to the film base.
• Construction Materials: Used as an additive in cement and gypsum to improve workability, adhesion, and reduce dust.

Basic Information

Product Name	Poly(Vinyl Alcohol-Co-Ethylene)
CAS No.	25067-34-9
Molecular Formula	(C2H4O.C4H6O2)x
Molecular Weight	Varies by grade (Typical Mw: 20,000 - 200,000 g/mol)
Synonyms	Ethylene-Vinyl Alcohol Copolymer; EVOH; EVAL; Poly(ethylene-co-vinyl alcohol); Vinyl alcohol-ethylene copolymer; 1-Ethenol, polymer with ethene; Ethenol, homopolymer, ether with ethene; OH-functionalized polyethylene
EINECS	246-562-2

Quality Control

Our Poly(Vinyl Alcohol-Co-Ethylene) is produced under a strict quality management system. Each batch is tested to ensure consistent properties such as ethylene content, degree of hydrolysis, viscosity, and residual monomer levels. Certificates of Analysis (COA) documenting these parameters are provided with every shipment. We can support compliance requirements for food contact and pharmaceutical applications, with grades available that meet relevant regulatory frameworks.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the original container sealed to prevent caking or property changes due to moisture absorption. Keep away from strong acids and strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white granules or powder
Identification (IR)	Complies
Ethylene Content	27 - 48 mol% (Grade dependent)
Degree of Hydrolysis	≥ 99 mol%
Viscosity (4% aq. sol.)	4 - 60 mPa·s (Grade dependent)
Volatiles	≤ 5.0 %
Ash Content	≤ 0.5 %
pH (4% aq. sol.)	5.0 - 7.0

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.