Description

1,3-Isobenzofurandione, 5,5-(1-Methylethylidene)Bis(4,1-Phenyleneoxy)Bis-, Polymer With 1,4-Benzenediamine is a high-performance polyimide precursor or oligomer, known for its exceptional thermal stability and mechanical properties. This advanced material is critical for applications demanding reliability under extreme conditions, offering a combination of high-temperature resistance, chemical inertness, and excellent dielectric characteristics. It is primarily sought by manufacturers in the aerospace, electronics, and advanced composite materials industries for producing coatings, adhesives, films, and high-strength matrix resins.

Application

• High-Temperature Adhesives & Sealants: Used in aerospace and automotive assemblies for bonding components exposed to extreme heat.
• Advanced Composite Matrix Resins: Serves as a key polymer matrix for carbon fiber and other high-performance composites in structural applications.
• Electronic Encapsulants & Passivation Layers: Provides protective, insulating coatings for sensitive microelectronics and semiconductor devices.
• Flexible & Rigid Printed Circuit Board (PCB) Substrates: Employed in the production of high-reliability, heat-resistant PCB laminates.
• Wire & Cable Insulation: Used for insulating wires in high-temperature environments, such as in aviation and industrial machinery.
• Protective & Abrasion-Resistant Coatings: Formulated into coatings for metal, ceramic, and other substrates requiring durability and thermal protection.
• Membrane & Separation Technology: Potential use in the fabrication of high-temperature, chemically resistant filtration membranes.
• Precursor for Polyimide Films & Fibers: A vital intermediate in the synthesis of commercial polyimide products like Kapton®-type films.

Basic Information

Product Name	1,3-Isobenzofurandione, 5,5-(1-Methylethylidene)Bis(4,1-Phenyleneoxy)Bis-, Polymer With 1,4-Benzenediamine
CAS No.	61128-47-0
Molecular Formula	(C31H20O8 · C6H8N2)n
Molecular Weight	Polymeric substance (Contact for details)
Synonyms	Poly[(oxy-4,1-phenylene)-5,5-(1-methylethylidene)bis(oxy-4,1-phenylene)pyromellitimide]
Bisphenol A dianhydride-pyromellitic dianhydride-1,4-phenylenediamine copolymer
BPADA-PMDA-PPD copolymer
Poly(bisphenol A dianhydride-co-pyromellitic dianhydride-co-1,4-phenylenediamine)
Polyimide oligomer based on BPADA, PMDA, and PPD
Thermoplastic polyimide precursor
PMDA/BPADA/PPDA polymer
EINECS	Contact for details

Quality Control

Our production of this advanced polymer adheres to strict quality management systems, ensuring batch-to-batch consistency and performance reliability. Key parameters such as inherent viscosity, glass transition temperature (Tg), and residual solvent content are rigorously monitored. Certificates of Analysis (COA) detailing specific lot specifications are available upon request. We support compliance with relevant industry standards for high-performance polymers.

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). This material may be hygroscopic; keep the container tightly sealed to minimize moisture absorption. Keep away from strong oxidizers and incompatible materials.

Specification

Item	Specification
Appearance	Yellow to amber powder or granules
Identification (IR)	Conforms to structure
Inherent Viscosity	0.35 - 0.65 dL/g (typical)
Glass Transition Temperature (Tg)	> 250 °C
Residual Solvent (NMP)	< 0.5 %
Moisture Content	< 1.0 %
Ash Content	< 0.1 %

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