Description

Polyisoprene Rubber CAS NO 308067-72-3 is a high-performance synthetic elastomer designed to replicate the properties of natural rubber. It is prized for its excellent resilience, high tensile strength, and superior purity, making it a critical raw material for applications requiring consistent quality and reliable performance. This product is essential for manufacturers in the medical, automotive, and consumer goods industries seeking a dependable alternative to natural rubber with reduced allergenicity and batch-to-batch variation.

Application

• Medical Devices & Pharmaceutical Stoppers: Primary material for syringe plungers, vial stoppers, and surgical gloves due to its high purity, biocompatibility, and low protein content.
• Adhesives & Sealants: Used in pressure-sensitive adhesives (PSAs), hot-melt adhesives, and construction sealants for its strong tack and cohesive strength.
• Automotive Components: Key ingredient in vibration dampeners, gaskets, hoses, and other under-the-hood parts requiring oil and heat resistance.
• Consumer Goods: Found in baby bottle nipples, pacifiers, elastic bands, and footwear for its softness, elasticity, and safety profile.
• Sporting Goods: Utilized in the production of golf ball cores, bicycle tires, and other equipment demanding high rebound and durability.
• Industrial Rubber Goods: Serves as a base polymer for belts, hoses, and molded rubber products across various manufacturing sectors.

Basic Information

Product Name	Polyisoprene Rubber
CAS No.	308067-72-3
Molecular Formula	(C5H8)n
Molecular Weight	Varies (Polymer)
Synonyms	Poly(1-methyl-1-butenylene); Synthetic Polyisoprene; cis-1,4-Polyisoprene; IR Rubber (Isoprene Rubber); Natsyn; Isoprene Rubber; Isoprene Homopolymer; Synthetic Natural Rubber (SNR)
EINECS	Contact for details

Quality Control

Our Polyisoprene Rubber is manufactured under a stringent quality management system to ensure it meets the exacting standards of our global clientele. Each batch is subjected to comprehensive analytical testing, including determination of cis-1,4 content, molecular weight distribution, and residual monomer levels. Certificates of Analysis (COA) documenting purity, viscosity, and other critical parameters are available upon request to support your quality assurance and regulatory compliance needs.

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, excessive heat, and direct sunlight to prevent premature degradation or cross-linking.

Specification

Item	Specification
Appearance	White to pale yellow crumb or bale
Identification (IR)	Conforms
cis-1,4 Content	> 98%
Mooney Viscosity (ML 1+4 @ 100°C)	30 - 90 (Grade dependent)
Volatile Matter	< 0.8%
Ash Content	< 0.5%
Stabilizer Content	As specified (Non-staining or staining)

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