Description

p-Phenylenebis(Trimellitate Anhydride) (CAS No. 2770-49-2) is a high-purity, bifunctional aromatic anhydride monomer of significant industrial importance. This compound serves as a critical building block for the synthesis of advanced polymers, particularly high-performance polyimides and polyamide-imides. It is essential for manufacturers and R&D laboratories seeking to develop materials with exceptional thermal stability, mechanical strength, and chemical resistance. Key industries that rely on this monomer include electronics, aerospace, and advanced coatings.

Application

• Polyimide Synthesis: Primary monomer for producing high-temperature, high-strength polyimide resins and films used in flexible printed circuits (FPCs) and semiconductor insulation layers.
• Polyamide-Imide (PAI) Production: Key ingredient in the manufacture of PAI resins, which are used for high-performance wire enamels, adhesives, and injection-molded components.
• Advanced Composite Materials: Used as a cross-linking agent or curing agent in epoxy and other thermoset systems to enhance thermal and mechanical properties for aerospace and automotive applications.
• Electronic Encapsulants & Underfills: Employed in formulations for materials that protect sensitive microelectronics from thermal stress and environmental factors.
• Specialty Coatings: Imparts superior heat resistance and durability to coatings for industrial equipment, cookware, and wire insulation.
• Research & Development: Serves as a versatile intermediate in organic synthesis for developing novel polymers and specialty chemicals with tailored properties.

Basic Information

Product Name	p-Phenylenebis(Trimellitate Anhydride)
CAS No.	2770-49-2
Molecular Formula	C24H10O8
Molecular Weight	426.34 g/mol
Synonyms	1,4-Phenylenebis(trimellitate anhydride); 4,4'-Bis(trimellitic anhydride)diphenyl ether (common misnomer); p-Phenylene bis(trimellitate) dianhydride; PTDA; TA-PP-TA; 1,1'-(1,4-Phenylene)bis(1,3-dihydro-1,3-dioxo-5-isobenzofurancarboxylic acid); 5,5'-(1,4-Phenylene)bis(1,3-dioxo-1,3-dihydro-2-benzofuran-2-carboxylic acid); Bis(trimellitic anhydride)phenylene ester
EINECS	220-468-5

Quality Control

Our p-Phenylenebis(Trimellitate Anhydride) is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes rigorous analytical testing, including assay, impurity profiling, and physical characterization, to meet stringent industry specifications for polymer-grade monomers. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment to support your quality assurance protocols.

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 product is hygroscopic (moisture-sensitive); containers must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality and performance.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.5%
Melting Point	285 - 295 °C
Loss on Drying	≤ 0.5%
Acid Value	Contact for details
Heavy Metals (as Pb)	≤ 10 ppm
Residue on Ignition	≤ 0.1%

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