Description

Styrene-Isoprene-Butadiene Rubber (SIBR) is a high-performance synthetic elastomer engineered to deliver a superior balance of properties for demanding applications. This advanced copolymer is valued for its excellent abrasion resistance, low rolling resistance, and good wet grip characteristics. It is a critical material for manufacturers in the tire, automotive parts, industrial belts, and footwear industries seeking to enhance product durability and performance.

Application

• High-Performance Tire Treads and Sidewalls: Used to improve wear resistance, fuel efficiency (via low rolling resistance), and wet traction in passenger, truck, and specialty tires.
• Automotive Components: Formulated into vibration dampers, seals, gaskets, and hoses requiring a robust balance of elasticity and environmental resistance.
• Industrial and Conveyor Belts: Provides excellent durability, flexibility, and resistance to cutting and tearing in heavy-duty applications.
• Footwear and Sporting Goods: Used in soles and components for athletic shoes and equipment where superior grip, cushioning, and longevity are required.
• Polymer Modification and Blends: Acts as a performance-enhancing additive or compatibilizer in other rubber and plastic compounds.
• Adhesives and Sealants: Imparts strong, flexible bonding characteristics in high-strength industrial and construction adhesives.

Basic Information

Product Name	Styrene-Isoprene-Butadiene Rubber
CAS No.	438544-68-4
Molecular Formula	(C8H8·C5H8·C4H6)x
Molecular Weight	Polymer (Variable)
Synonyms	SIBR; Styrene Isoprene Butadiene Rubber; Terpolymer of Styrene, Isoprene, and Butadiene; 1,3-Butadiene, polymer with 2-methyl-1,3-butadiene and ethenylbenzene; Butadiene-Isoprene-Styrene Rubber; Rubber, styrene-isoprene-butadiene
EINECS	Contact for details

Quality Control

Our Styrene-Isoprene-Butadiene Rubber is manufactured under stringent process controls to ensure batch-to-batch consistency and performance reliability. Quality is verified through comprehensive testing of key parameters including polymer microstructure (by NMR), styrene content, vinyl content, Mooney viscosity, and stabilizer levels. A Certificate of Analysis (COA) detailing all specifications is provided with each shipment to guarantee 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, open flames, and strong oxidizing agents. For long-term storage, maintain under an inert atmosphere (e.g., nitrogen) to prevent premature cross-linking or degradation.

Specification

Item	Specification
Appearance	Pale yellow to amber bale/crumbs
Styrene Content	10 - 25 %
Isoprene Content	20 - 40 %
Butadiene Content	40 - 60 %
Vinyl Content (in butadiene)	10 - 50 %
Mooney Viscosity (ML 1+4 @ 100°C)	30 - 80
Volatile Matter	≤ 0.75 %
Ash Content	≤ 0.50 %
Stabilizer Type	Non-staining / Staining (as required)

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