Description

Ethylene Methacrylic Acid Copolymer Partial Metal Salt is an ionomer resin formed by the partial neutralization of an ethylene-methacrylic acid copolymer with metal cations. This material is valued for its unique combination of toughness, clarity, and adhesion properties, bridging the gap between traditional plastics and elastomers. It is essential for manufacturers in the packaging, automotive, and consumer goods industries seeking materials with excellent melt strength, chemical resistance, and sealability.

Application

• Packaging Films: Used as a heat-seal layer in multi-layer films for food and medical packaging due to its excellent adhesion and seal integrity.
• Automotive Components: Employed in bumper covers, trim, and under-hood parts for its impact resistance and paintability.
• Golf Ball Covers: A key material in the manufacture of durable, high-performance golf ball covers that provide a soft feel and high cut resistance.
• Adhesives and Tie Layers: Functions as a compatibilizer and adhesive layer in co-extrusion and lamination processes for dissimilar materials.
• Consumer Goods: Used in flexible tubing, household goods, and protective coatings where toughness and clarity are required.
• Wire and Cable Jacketing: Provides a protective, semi-conductive, or insulating layer with good environmental stress crack resistance.

Basic Information

Product Name	Ethylene Methacrylic Acid Copolymer Partial Metal Salt
CAS No.	9078-96-0
Molecular Formula	(C5H8O2·C2H4)x·Mz (M = metal cation, e.g., Na+, Zn2+)
Molecular Weight	Varies by grade and metal ion content
Synonyms	Ethylene/Methacrylic Acid Copolymer Ionomer; Ethylene-MAA Ionomer; Ionomer Resin; Poly(ethylene-co-methacrylic acid) partial metal salt; Surlyn® (trade name series); AClyn® (trade name series); Iotek® (trade name series); Ethylene Methacrylic Acid Ionomer
EINECS	Contact for details

Quality Control

Our ionomer resins are produced under strict quality management systems to ensure batch-to-batch consistency for critical applications. Key parameters such as melt flow index (MFI), metal ion content, and acid neutralization level are rigorously controlled. A comprehensive Certificate of Analysis (COA) detailing physical, mechanical, and compositional specifications is provided with every shipment to support your quality assurance protocols.

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). Keep away from heat sources and open flame. The material is hygroscopic (moisture-sensitive); ensure containers are sealed after use to prevent moisture absorption, which can affect processing characteristics.

Specification

Item	Specification
Appearance	Pellets or granules, clear to translucent
Melt Flow Rate (190°C/2.16 kg)	0.5 - 20 g/10 min (grade dependent)
Density	0.93 - 0.97 g/cm³
Melting Point (DSC)	85 - 100 °C
Methacrylic Acid Content	4 - 15 wt%
Neutralization Level	20 - 80% (of acid groups)
Metal Ion Type	Sodium (Na+), Zinc (Zn2+), or others
Tensile Strength at Yield	15 - 30 MPa
Elongation at Break	300 - 500 %

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