Description

Acrylonitrile, Butadiene Polymer, Hydroxy-Terminated, Bis(Hydrogen Maleate) Ester is a specialized functionalized polymer, specifically a hydroxy-terminated nitrile rubber (HTBN) derivative. This compound matters for its unique combination of reactive end groups and a nitrile rubber backbone, enabling precise chemical modification and crosslinking. It is primarily needed by formulators in the adhesives, sealants, coatings, and advanced composite materials industries seeking to enhance toughness, chemical resistance, and adhesion properties.

Application

• High-Performance Adhesives & Sealants: Acts as a reactive toughening agent and modifier for epoxy, polyurethane, and acrylic systems, improving peel strength and flexibility.
• Advanced Composite Matrices: Used as a flexibilizer and impact modifier in thermoset resin systems for aerospace, automotive, and wind energy components.
• Protective & Functional Coatings: Incorporated into coating formulations to enhance chemical resistance, adhesion to difficult substrates, and durability.
• Elastomer Modification: Serves as a compatibilizer and crosslinking agent in blends with other polymers to tailor mechanical and thermal properties.
• Potting & Encapsulation Compounds: Improves the stress relief and crack resistance of electronic potting compounds and encapsulants.
• Rubber-to-Metal Bonding Agents: A key intermediate in formulations designed for strong bonds between elastomers and metal surfaces.

Basic Information

Product Name	Acrylonitrile, Butadiene Polymer, Hydroxy-Terminated, Bis(Hydrogen Maleate) Ester
CAS No.	69991-75-9
Molecular Formula	Typically represented as (C3H3N·C4H6)n with terminal modifications. Exact formula varies with molecular weight.
Molecular Weight	Varies by grade. Contact for details.
Synonyms	Hydroxy-Terminated Butadiene-Acrylonitrile Copolymer Maleate; HTBN Maleate Ester; Maleated Hydroxy-Terminated Nitrile Rubber; Bis(Hydrogen Maleate)-Terminated NBR; Reactive Liquid Nitrile Rubber; Functionalized NBR Oligomer; Telechelic Nitrile Rubber Derivative; Carboxyl-Functional HTBN (related form)
EINECS	Contact for details.

Quality Control

Our Acrylonitrile, Butadiene Polymer, Hydroxy-Terminated, Bis(Hydrogen Maleate) Ester is manufactured under a strict quality management system. Each batch is characterized for critical parameters including hydroxyl value, acid value, acrylonitrile content, and molecular weight to ensure consistent performance in your formulations. Certificates of Analysis (COA) detailing these specifications are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong bases and oxidizing agents. Recommended storage temperature is 15-25°C. Under these conditions, the product is typically stable for 24 months from the date of manufacture. Keep container tightly sealed when not in use to prevent moisture absorption.

Specification

Item	Specification
Appearance	Viscous liquid, clear to amber
Acrylonitrile Content	18 - 26 %
Hydroxyl Value	40 - 60 mg KOH/g
Acid Value	20 - 40 mg KOH/g
Viscosity (25°C)	30,000 - 80,000 mPa·s
Color (Gardner)	≤ 6
Moisture Content	≤ 0.2 %

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