Description

1,3-Benzenedicarboxylic Acid, Diphenyl Ester, Polymer With (1,1-Biphenyl)-3,3,4,4-Tetramine is a high-performance polyamide-imide (PAI) precursor polymer, also known as a poly(amic acid) ester. This advanced material is valued for its exceptional thermal stability, mechanical strength, and excellent dielectric properties, which are critical for demanding engineering applications. It serves as a key intermediate for the synthesis of high-temperature resistant coatings, adhesives, films, and composite matrices, primarily targeting the aerospace, electronics, and automotive industries.

Application

• High-Temperature Wire Enamels and Insulating Varnishes: Used as a binder to create electrical insulation for motors, generators, and transformers that operate under extreme thermal stress.
• Advanced Composite Matrices: Acts as a polymer matrix for carbon fiber or glass fiber composites, providing lightweight strength and heat resistance for aerospace and automotive components.
• Protective and Adhesive Coatings: Formulated into coatings that offer superior chemical resistance, wear resistance, and thermal protection for industrial equipment and electronic parts.
• Flexible Printed Circuit Boards (FPCs): Employed in the production of high-performance polyimide films, which serve as flexible substrates in advanced electronics.
• Semiconductor Encapsulation and Passivation: Used in the fabrication of microelectronic devices where stability at high processing temperatures is required.
• Membrane Technology: Can be processed into semi-permeable membranes for high-temperature gas separation or filtration applications.
• 3D Printing Resins for Engineering Plastics: Serves as a base for formulating high-strength, heat-resistant photopolymer resins for additive manufacturing.

Basic Information

Product Name	1,3-Benzenedicarboxylic Acid, Diphenyl Ester, Polymer With (1,1-Biphenyl)-3,3,4,4-Tetramine
CAS No.	25928-81-8
Molecular Formula	(C20H14O4 • C12H12N4)n
Molecular Weight	Polymer - Contact for details
Synonyms	Poly(amic acid) ester from isophthaloyl chloride and 3,3',4,4'-biphenyltetramine; PAI precursor polymer; Polyamide-imide precursor; BPDA/ODPA poly(amic acid) ester; Thermoplastic polyimide intermediate; Polymer of diphenyl isophthalate and 3,3',4,4'-biphenyltetramine; High-temperature polymer resin
EINECS	Contact for details

Quality Control

Our production of this advanced polymer adheres to strict quality management systems to ensure batch-to-batch consistency and performance reliability. Key parameters such as inherent viscosity, solid content, amine end-group concentration, and residual solvent levels are rigorously monitored. A comprehensive Certificate of Analysis (COA) detailing all relevant specifications is provided with each shipment to support your quality assurance and R&D processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at temperatures between 2°C and 8°C (refrigerated) to maintain polymer stability and prevent premature imidization or viscosity increase. The material is moisture-sensitive (hygroscopic). Allow the container to reach ambient temperature before opening to prevent condensation.

Specification

Item	Specification
Appearance	Yellow to amber viscous solution or solid
Solid Content	10-30% (in specified solvent)
Inherent Viscosity	0.5 - 1.2 dL/g (at 30°C)
Identification (IR)	Conforms to structure
Solvent (Typical)	N-Methyl-2-pyrrolidone (NMP), DMAc
Residual Monomers	< 0.5% (by HPLC)
Metal Impurities	< 10 ppm (by ICP-MS)

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