Description

Epoxidized Natural Rubber (ENR) is a chemically modified form of natural rubber where some of the double bonds are converted into epoxide (oxirane) groups, imparting enhanced oil resistance, gas impermeability, and improved compatibility with polar materials. This modification creates a versatile specialty elastomer that bridges the performance gap between conventional natural rubber and synthetic polymers. It is essential for manufacturers in the tire, automotive, and advanced adhesive industries seeking to improve product durability and performance under demanding conditions.

Application

• Tire Manufacturing: Used in tire inner liners and sidewalls for improved air retention and reduced rolling resistance.
• Oil-Resistant Components: Formulation of gaskets, seals, and hoses requiring resistance to oils and fuels.
• Advanced Adhesives & Sealants: Serves as a key component in high-performance, polar-substrate bonding adhesives and sealants.
• Polymer Blending & Modification: Acts as a compatibilizer and toughening agent in blends with polar polymers like PVC or nylon.
• Damping Materials: Production of vibration-damping mounts and pads with a good balance of resilience and damping properties.
• Coated Fabrics & Membranes: Used in impermeable membranes and coated textiles for protective applications.

Basic Information

Product Name	Epoxidized Natural Rubber
CAS No.	138009-59-3
Molecular Formula	(C5H8O)n (Variable, based on epoxidation level)
Molecular Weight	Variable (High Polymer)
Synonyms	ENR; Epoxidised Natural Rubber; Oxirane, 2-methyl-, homopolymer, (2S)-; Natural Rubber, epoxidized; Epoxidized Polyisoprene; Epoxy Natural Rubber; ENR 25; ENR 50 (numbers denote mol% epoxidation)
EINECS	Contact for details

Quality Control

Our Epoxidized Natural Rubber is produced under controlled conditions to ensure consistent epoxidation levels and material properties. Each batch is characterized for key parameters including epoxide content, Mooney viscosity, and stability. Certificates of Analysis (COA) detailing these specifications are provided to guarantee the material meets the agreed technical requirements for your application.

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 strong oxidizing agents, acids, and heat sources to prevent premature cross-linking or degradation. For long-term storage, consider under an inert atmosphere.

Specification

Item	Specification
Appearance	Pale yellow to amber solid (crumb/sheet)
Epoxide Content (mol%)	25, 50, or Custom
Mooney Viscosity (ML 1+4 @ 100°C)	30 - 80 (Grade dependent)
Identification (IR)	Conforms to structure
Volatile Matter (%)	≤ 1.0
Ash Content (%)	≤ 0.5
Stabilizer Content	As required / Non-stained grades available

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