4,4′-Diaminodiphenyl Ether (ODA), also known as 4,4′-Oxydianiline (ODA). It is an organic compound with CAS Number 101-80-4.
ODA serves as a key building block in polymer chemistry, particularly for creating polyimides renowned for their exceptional heat resistance (often exceeding 300°C continuous use), radiation resistance, and electrical insulation properties.

 

Technical Specifications

ITEMS SPECIFICATIONS
Appearance White Crystals (yellowish or grayish color is allowed)
Assay ≥99.5%
Metal Ion ≤2ppm
Initial Melting Point ≥186℃

 

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.

 

Benefits of 4,4′-Diaminodiphenyl Ether (ODA)

Superior Thermal Stability:
Enables polymers to withstand extreme temperatures without degradation.

Excellent Mechanical Strength:
Contributes to high tensile strength and flexibility in films, fibers, and coatings.

Outstanding Electrical Insulation:
Ideal for electronic and electrical applications requiring reliable dielectric performance.

Chemical Resistance:
Provides resistance to solvents, radiation, and harsh environments.

Versatile Monomer:
Functions effectively as a diamine in polycondensation reactions with dianhydrides or as a curing agent/cross-linker in epoxy and other resin systems.

 

Applications & Uses of 4,4′-Diaminodiphenyl Ether (ODA)

ODA is primarily utilized as a monomer and cross-linking agent in high-performance polymer production:

Polyimide and Poly(amide-imide) Resins

  • Production of polyimide films (such as Kapton-type materials), coatings, adhesives, and varnishes.
  • Wire enamels, insulating varnishes, and flexible printed circuit boards (PCBs).
  • Aerospace composites, oil sealants, and flame-retardant fibers.

Electronics and Electrical Industry

  • High-temperature insulation for cables, semiconductors, and electronic packaging.
  • Photoresists and advanced materials for microelectronics.

Other Industrial Applications

  • Curing agent for epoxy resins and polyurethane systems.
  • Synthesis of aramids, poly(ester)imides, and aromatic polyether imides.
  • Heat-resistant coatings, laminates, and engineering plastics.

 

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 is the primary use of 4,4′-Diaminodiphenyl Ether (ODA)?
A: It is mainly used as a monomer in the synthesis of high-performance polyimide resins, which offer exceptional thermal, mechanical, and electrical properties for aerospace, electronics, and industrial applications.

Q: How should it be stored?
A: Store under inert gas (such as nitrogen) in a cool, dry place away from light and air to prevent oxidation. Keep containers tightly sealed.

Q: What solvents is 4,4′-Diaminodiphenyl Ether (ODA) soluble in?
A: It is insoluble in water but soluble in polar aprotic solvents such as N,N-dimethylacetamide (DMAc), N-methyl-2-pyrrolidone (NMP), and dimethylformamide (DMF).

 

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