Description

Poly(Butadiene-Co-Acrylonitrile), Vinyl Terminated is a reactive liquid nitrile rubber (NBR) polymer featuring terminal vinyl groups, which provide enhanced sites for cross-linking and chemical modification. This unique structure is critical for formulating high-performance adhesives, sealants, and impact modifiers that require excellent oil and fuel resistance combined with improved processability. It is an essential raw material for manufacturers in the aerospace, automotive, and specialty polymer industries seeking to enhance the toughness and chemical resistance of their products.

Application

• Reactive Modifier for Epoxy and Phenolic Resins: Used to significantly improve the fracture toughness, flexibility, and impact resistance of high-performance thermoset composites and adhesives.
• High-Performance Sealant and Adhesive Formulations: Serves as a key polymer backbone in fuel-resistant and oil-resistant sealants, gaskets, and structural adhesives for automotive and aerospace applications.
• Cross-Linking Agent in Elastomer Systems: The terminal vinyl groups facilitate co-vulcanization with other diene rubbers, enhancing the properties of custom rubber compounds.
• Compatibilizer and Impact Modifier for Engineering Plastics: Improves the compatibility between polar and non-polar polymer blends, increasing the durability of PVC, ABS, and nylon blends.
• Binder for Advanced Composite Materials: Employed in the production of carbon fiber prepregs and filament-wound structures requiring a balance of strength and chemical resistance.
• Base Polymer for Radiation-Curable Coatings: Utilized in UV-curable coating systems where fast curing and chemical resistance are paramount.

Basic Information

Product Name	Poly(Butadiene-Co-Acrylonitrile), Vinyl Terminated
CAS No.	68891-47-4
Molecular Formula	(C4H6·C3H3N)n
Molecular Weight	Varies by grade (typically 3,000 - 5,000 g/mol)
Synonyms	Vinyl-Terminated Nitrile Rubber; VTBN; Vinyl-Terminated Butadiene-Acrylonitrile Copolymer; Reactive Liquid Nitrile Rubber; ATBN (Amino-Terminated) analogue; Carboxyl-Terminated Nitrile Rubber (CTBN) analogue; Telechelic NBR; Nitrile Butadiene Rubber, vinyl-terminated
EINECS	Contact for details

Quality Control

Our Poly(Butadiene-Co-Acrylonitrile), Vinyl Terminated is manufactured under a stringent quality management system. Each batch is characterized for critical parameters including acrylonitrile content, vinyl functionality, molecular weight, and viscosity to ensure consistent performance. A comprehensive Certificate of Analysis (COA) detailing these specifications is provided with every shipment to guarantee compliance with your formulation requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at temperatures between 15-25°C (59-77°F). This product is easily oxidized; for long-term storage, it is recommended to blanket the container headspace with an inert gas such as nitrogen. Keep away from strong oxidizing agents, acids, and bases.

Specification

Item	Specification
Appearance	Clear, viscous liquid
Acrylonitrile Content	10 - 30%
Vinyl Functionality (equiv./g)	0.05 - 0.10 meq/g
Viscosity @ 25°C	50,000 - 150,000 cP
Color (Gardner)	≤ 5
Moisture Content	≤ 0.1%
Identification (IR)	Conforms

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