Description

Poly(Butadiene-Co-Acrylonitrile), Dicarboxy Terminated is a reactive liquid nitrile rubber (NBR) polymer with carboxylic acid end groups. This functionalization is critical as it enables covalent bonding and cross-linking with various substrates, significantly enhancing adhesion, toughness, and chemical resistance in composite materials. It is primarily sought by formulators and manufacturers in the advanced adhesives, sealants, coatings, and polymer modification industries seeking to improve the performance characteristics of their final products.

Application

• Toughening Agent for Epoxy Resins: Used to improve the fracture toughness and impact resistance of epoxy systems for aerospace, automotive, and electronic composite applications.
• High-Performance Adhesive Formulations: Serves as a key component in structural adhesives and sealants, providing excellent flexibility and bond strength to metals, plastics, and elastomers.
• Reactive Modifier for Coatings: Incorporated into polyurethane, epoxy, and other coating systems to enhance flexibility, chemical resistance, and durability.
• Compatibilizer for Polymer Blends: Facilitates the blending of immiscible polymers, such as polar and non-polar plastics, by acting as an interfacial agent.
• Fuel and Oil-Resistant Elastomer Modification: Used to modify other elastomers to improve their resistance to fuels, oils, and hydrocarbons.
• Binder for Energetic Materials: Employed in propellant and explosive formulations where its reactive groups contribute to the binder matrix's mechanical properties.

Basic Information

Product Name	Poly(Butadiene-Co-Acrylonitrile), Dicarboxy Terminated
CAS No.	68891-46-3
Molecular Formula	(C4H6·C3H3N)x·C2H2O4
Molecular Weight	Varies by acrylonitrile content and chain length. Typical Mn: 3,000 - 5,000 g/mol.
Synonyms	Carboxyl-Terminated Nitrile Rubber (CTBN); Carboxy-Terminated Acrylonitrile Butadiene Copolymer; CTBN Rubber; Reactive Liquid Nitrile Rubber; Carboxylated NBR; Butadiene/Acrylonitrile Copolymer, Carboxy-Terminated; Dicarboxyl-Terminated Poly(Butadiene-Co-Acrylonitrile); ATBN Carboxyl-Terminated (related variant)
EINECS	Contact for details

Quality Control

Our Poly(Butadiene-Co-Acrylonitrile), Dicarboxy Terminated is manufactured under a stringent quality management system. Each batch is characterized for critical parameters including acid value, acrylonitrile content, molecular weight, and viscosity to ensure consistent performance as a reactive polymer intermediate. Certificates of Analysis (COA) detailing these specifications are provided with every shipment to guarantee traceability and 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 (store under inert atmosphere) and may be sensitive to strong acid/organic solvent. Keep away from heat, sparks, and open flame. Under recommended storage conditions, the product is typically stable for 24 months from the date of manufacture.

Specification

Item	Specification
Appearance	Viscous, clear to amber liquid
Acid Value (mg KOH/g)	Contact for details
Acrylonitrile Content (%)	Contact for details
Viscosity (cP @ 27°C)	Contact for details
Number Average Molecular Weight (Mn)	Contact for details
Color (Gardner)	≤ 6
Volatile Matter (%)	≤ 1.0

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