Description

4,4'-(4,4'-Isopropylidenediphenoxy)Bis(Phthalic Anhydride) is a high-purity aromatic dianhydride monomer essential for synthesizing advanced polymeric materials. Its bifunctional structure provides the critical building block for creating polymers with exceptional thermal stability and mechanical properties. This product is primarily needed by manufacturers in the advanced materials, electronics, and aerospace sectors for producing high-performance polyimides and epoxy resins.

Application

• Polyimide Synthesis: A key monomer for the production of high-temperature, high-strength polyimide films and coatings used in flexible printed circuits (FPC) and aerospace components.
• Epoxy Curing Agent: Serves as a high-performance curing agent for epoxy resin systems, enhancing their thermal resistance and mechanical strength for composite materials.
• Advanced Polymer Intermediates: Used in the synthesis of polyetherimides (PEI), polyamide-imides (PAI), and other specialty engineering plastics.
• Electronic Encapsulation Materials: Employed in the formulation of protective coatings and encapsulants for semiconductors and microelectronic devices due to its excellent insulating properties.
• Adhesive & Composite Formulations: A critical component in high-temperature adhesives and matrix resins for carbon fiber and other advanced composites.
• Research & Development: Used in academic and industrial R&D for developing novel polymeric materials with tailored properties.

Basic Information

Product Name	4,4'-(4,4'-Isopropylidenediphenoxy)Bis(Phthalic Anhydride)
CAS No.	38103-06-9
Molecular Formula	C31H20O8
Molecular Weight	520.48 g/mol
Synonyms	BPADA; Bisphenol A Dianhydride; 4,4'-(4,4'-Isopropylidenediphenoxy)diphthalic anhydride; 2,2-Bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride; Bisphenol A diphthalic anhydride; 1,1,1,3,3,3-Hexafluoro-2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride (common misnomer for related compound); 4,4'-(4,4'-Isopropylidenediphenoxy)bis(phthalic acid) dianhydride; BPA-DA
EINECS	Contact for details

Quality Control

Our 4,4'-(4,4'-Isopropylidenediphenoxy)Bis(Phthalic Anhydride) is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure high purity and consistency, meeting the stringent requirements for polymer synthesis. Certificates of Analysis (COA) with detailed specifications for assay, melting point, and impurity profiles are available upon request.

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 is hygroscopic (moisture-sensitive); ensure containers are sealed immediately after use to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 99.0%
Melting Point	185 - 195 °C
Loss on Drying	≤ 0.5%
Heavy Metals (as Pb)	≤ 10 ppm
Chloride (Cl)	≤ 50 ppm

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