4,4'-Diaminodiphenyl Ether (ODA)

4,4'-Diaminodiphenyl Ether (ODA), with CAS Number 101-80-4, is a colorless to off-white crystalline solid.   It is also referred to as 4,4'-Oxydianiline, Bis(4-aminophenyl) ether, or 4-Aminophenyl ether.

ODA is insoluble in water but soluble in common organic solvents used in polymer synthesis.

4,4'-Diaminodiphenyl Ether (ODA) is a critical aromatic diamine monomer essential for manufacturing high-temperature-resistant polyimides and advanced engineering plastics.

Technical Specifications

Packaging & Storage

• Net weight 25kgs drum. Aluminum foil bag inside, cartons outside.

• Store in a cool, ventilated warehouse. Keep away from fire and heat sources. Avoid direct sunlight.

Key Benefits of 4,4'-Diaminodiphenyl Ether (ODA)

Outstanding Thermal Stability:

Enables polymers to withstand continuous use at temperatures exceeding 200–300°C.

Excellent Mechanical Strength:

Provides high tensile strength, flexibility, and dimensional stability in final resins and films.

Superior Electrical Insulation:

Low dielectric constant and high dielectric strength, ideal for electronics and wire enamels.

Chemical Resistance:

Resists solvents, radiation, and harsh environments.

Versatile Monomer:

Acts as a chain extender and curing agent in polyimides, poly(ester)imides, epoxy systems, and other high-performance resins.

Primary Applications of 4,4'-Diaminodiphenyl Ether (ODA)

4,4'-Diaminodiphenyl Ether (ODA) is primarily utilized in the synthesis of high-performance polymers:

Polyimide and Poly(ester)imide Resins

• Production of polyimide films, varnishes, and coatings.

• Wire enamels for high-temperature motors and generators, including new energy vehicles.

• Flexible and rigid printed circuit boards (PCBs) with excellent thermal and electrical performance.

• Aerospace laminates, composites, and insulating materials for extreme environments.

Other Industrial Applications

• Curing agent in advanced epoxy resins.

• Monomer for polyamide-imide, polyester-imide, and polymaleimide resins.

• Flame-retardant fibers, adhesives, coated fabrics, and oil sealants.

• Photoresists and specialty foams in electronics and electrical industries.

Frequently Asked Questions (FAQs)

Q: What is the CAS number for 4,4'-Diaminodiphenyl Ether (ODA)?

A: The CAS Registry Number is 101-80-4.

Q: What are the common synonyms for ODA?

A: Common names include 4,4'-Oxydianiline, 4,4'-Diaminodiphenyl ether, Bis(4-aminophenyl) ether, and 4-Aminophenyl ether.

Q: What is the primary use of ODA?

A: ODA is mainly used as a monomer in the production of high-performance polyimide resins (such as Kapton-type films) and other heat-resistant polymers for aerospace, electronics, and electrical applications.

Q: Is ODA suitable for high-temperature applications?

A: Yes. Polyimides derived from ODA exhibit excellent thermal stability, often withstanding continuous service temperatures above 200-300℃ while maintaining mechanical and electrical properties.

Q: How should ODA be stored?

A: Store in a cool, dry, well-ventilated area in tightly sealed containers to prevent oxidation and moisture absorption.

Q: Can ODA be used in epoxy resins?

A: Yes. It serves effectively as a curing agent or chain extender in advanced epoxy systems, enhancing thermal and mechanical performance.

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