Description

Chlorobutyl Rubber CAS NO 75214-07-2 is a halogenated copolymer of isobutylene and isoprene, engineered to provide superior impermeability and enhanced vulcanization compatibility. This modification significantly improves resistance to heat, ozone, and chemicals compared to standard butyl rubber, making it a critical material for demanding sealing applications. It is primarily sought by manufacturers in the pharmaceutical, automotive, and industrial goods sectors for producing high-performance components like tire inner liners, pharmaceutical stoppers, and specialized hoses.

Application

• Tire Inner Liners: The primary application, providing exceptional air retention and aging resistance for tubeless tires.
• Pharmaceutical Stoppers and Septa: Used for vial and syringe closures due to its excellent barrier properties against moisture and gases, ensuring drug stability.
• Automotive Hoses and Seals: Employed in coolant, vacuum, and air conditioning hoses where heat and chemical resistance are paramount.
• Industrial Gaskets and Diaphragms: Ideal for chemical processing equipment requiring a reliable seal against aggressive media.
• Adhesive and Sealant Formulations: Acts as a base polymer for high-performance, weather-resistant adhesives and construction sealants.
• Membranes for Protective Apparel: Used in laminates for chemical protective clothing due to its low permeability.

Basic Information

Product Name	Chlorobutyl Rubber
CAS No.	75214-07-2
Molecular Formula	(C4H8)x(C5H8)y
Molecular Weight	Varies (Polymer)
Synonyms	Chlorinated Butyl Rubber; IIR, chlorinated; Chlorobutyl; Butyl rubber, chlorinated; Chlorobutyl elastomer; Halobutyl rubber (chlorinated type); Exxon Chlorobutyl; Polysar Chlorobutyl
EINECS	Contact for details

Quality Control

Our Chlorobutyl Rubber is manufactured under a stringent quality management system. Each batch is tested against key parameters including chlorine content, Mooney viscosity, and cure characteristics to ensure consistent performance and processability. Certificates of Analysis (COA) detailing these specifications are provided with every shipment to guarantee traceability and compliance with your technical requirements.

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. Due to its nature of being easily oxidized (store under inert atmosphere), it is recommended to store under nitrogen blanket for long-term storage to prevent premature cross-linking or degradation.

Specification

Item	Specification
Appearance	Light colored slab
Chlorine Content	1.1 - 1.3 % (w/w)
Mooney Viscosity (ML 1+8 @ 125°C)	30 - 55
Volatile Matter	≤ 0.7 %
Ash Content	≤ 0.5 %
Stabilizer Content	Contact for details
Cure Characteristics (MDR @ 160°C)	Available on TDS

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