Description

2-Propenenitrile, Polymer With 1,3-Butadiene, 3-Carboxy-1-Cyano-1-Methylpropyl-Terminated, Ethoxylated CAS NO 71243-89-5 is a specialized, functionalized nitrile rubber polymer designed for high-performance applications. This product matters for its unique combination of chemical resistance, elasticity, and reactive terminal groups that enable further chemical modification and crosslinking. It is primarily needed by formulators and manufacturers in the adhesives, sealants, coatings, and advanced elastomer industries seeking to enhance material toughness and adhesion properties.

Application

• High-Performance Adhesives & Sealants: Acts as a key polymeric backbone or toughening agent in structural adhesives, pressure-sensitive adhesives (PSAs), and industrial sealants requiring excellent oil and fuel resistance.
• Specialty Coatings & Inks: Used in formulating chemical-resistant and flexible coatings for automotive, marine, and industrial equipment, as well as in specialty printing inks.
• Advanced Elastomer Compounding: Serves as a reactive modifier or base polymer in the production of oil-resistant gaskets, O-rings, hoses, and other molded rubber goods.
• Polymer Modification & Compatibilization: The reactive carboxyl and cyano terminal groups allow for grafting or blending with other polymers (e.g., epoxies, polyamides) to improve impact strength and compatibility.
• Fiber & Textile Treatment: Can be applied as a coating or sizing agent to improve the durability and chemical resistance of industrial fibers and fabrics.

Basic Information

Product Name	2-Propenenitrile, Polymer With 1,3-Butadiene, 3-Carboxy-1-Cyano-1-Methylpropyl-Terminated, Ethoxylated
CAS No.	71243-89-5
Molecular Formula	(C3H3N·C4H6·C6H8N2O3·C2H4O)x
Molecular Weight	Varies (Polymer)
Synonyms	Carboxyl-Terminated Acrylonitrile Butadiene Polymer, Ethoxylated; CTBN Rubber, Ethoxylated; Reactive Liquid Nitrile Rubber; Ethoxylated Acrylonitrile-Butadiene Carboxy-Terminated Polymer; 3-Carboxy-1-cyano-1-methylpropyl-terminated poly(acrylonitrile-co-butadiene), ethoxylated; ATBN Variant; Functionalized NBR; Telechelic Nitrile Rubber.
EINECS	Contact for details

Quality Control

Our production of 2-Propenenitrile, Polymer With 1,3-Butadiene, 3-Carboxy-1-Cyano-1-Methylpropyl-Terminated, Ethoxylated adheres to stringent quality management protocols. Each batch undergoes rigorous testing to ensure consistency in key parameters such as carboxyl value, acrylonitrile content, molecular weight, and viscosity. Certificates of Analysis (COA) documenting these specifications are available upon request to support your quality assurance and regulatory compliance needs.

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 / 59-77°F). Keep away from heat sources, open flames, and incompatible materials such as strong oxidizing agents. Under these conditions, the product is typically stable for 24 months from the date of manufacture.

Specification

Item	Specification
Appearance	Viscous Liquid
Color	Amber to Light Yellow
Acrylonitrile Content	Contact for details
Carboxyl Equivalent Weight	Contact for details
Viscosity (25°C)	Contact for details
Moisture Content	< 0.5%

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