Description

Poly(Isobutylene-Co-Isoprene), Brominated is a halogenated butyl rubber, a synthetic elastomer modified with bromine to enhance its reactivity and performance characteristics. This modification is critical for improving the material's adhesion to other substrates and its vulcanization properties, making it a superior choice for demanding sealing applications. It is primarily sought after by manufacturers in the automotive, construction, and industrial goods sectors for producing high-performance components like tire inner liners, pharmaceutical stoppers, and vibration damping elements.

Application

• Tire Manufacturing: As a key component in tire inner liners and inner tubes due to its excellent air retention and low permeability.
• Pharmaceutical Closures: Used in the production of bromobutyl rubber stoppers and seals for vials and medical containers, offering superior barrier properties.
• Industrial Seals and Gaskets: Formulated into molded and extruded seals for automotive, HVAC, and industrial equipment requiring chemical resistance.
• Adhesive and Sealant Formulations: Acts as a reactive polymer base for high-performance construction and industrial adhesives.
• Vibration Damping Components: Utilized in engine mounts and anti-vibration pads where durability and flexibility are paramount.
• Wire and Cable Insulation: Provides halogenated flame-retardant properties in specialized cable jacketing.
• Polymer Modification: Used as a compatibilizer or impact modifier in blends with other polymers like polyolefins.

Basic Information

Product Name	Poly(Isobutylene-Co-Isoprene), Brominated
CAS No.	68441-14-5
Molecular Formula	(C4H8)x·(C5H8)y·(Br)z
Molecular Weight	Varies by grade and bromine content
Synonyms	Brominated Butyl Rubber; Bromobutyl Rubber; BIIR (Bromo Isobutylene Isoprene Rubber); Brominated Isobutylene-Isoprene Copolymer; 1-Butene, 2-methyl-, polymer with 2-methyl-1,3-butadiene, brominated; Exxon Bromobutyl; JSR Bromobutyl; Halogenated Butyl Rubber
EINECS	Contact for details

Quality Control

Our Bromobutyl Rubber is manufactured under strict quality management systems to ensure batch-to-batch consistency and performance reliability. Each lot is tested against key parameters including bromine content, Mooney viscosity, and volatile matter. A Certificate of Analysis (COA) detailing these specifications is provided with every shipment. Our quality commitment aligns with industry standards for polymer production, ensuring the material meets the rigorous demands of automotive, pharmaceutical, and industrial applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Keep away from strong oxidizing agents, fluorides, and strong alkalis. For long-term storage, keep the original packaging sealed to prevent contamination and moisture absorption.

Specification

Item	Specification
Appearance	Off-white to light amber slab or pellets
Mooney Viscosity (ML 1+8 @ 125°C)	Contact for details
Bromine Content (%)	Contact for details
Volatile Matter (%)	≤ 0.7
Ash Content (%)	≤ 0.5
Stabilizer Content	Contact for details

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