Description

4,4'-Bismaleimidodiphenylmethane (DMX/BMI) is a high-performance bismaleimide monomer, a critical building block for advanced thermosetting polymers. This compound matters for its exceptional thermal stability, mechanical strength, and chemical resistance when polymerized, enabling materials to perform in demanding environments. It is essential for manufacturers in the aerospace, electronics, and high-temperature composite industries seeking to produce lightweight, durable components.

Application

• High-Temperature Composite Matrices: Primary resin component for aerospace structural parts, engine components, and missile radomes.
• Electronic Encapsulation & Packaging: Used in underfills, molding compounds, and printed circuit board laminates for superior thermal and dimensional stability.
• Adhesives & Bonding Agents: Formulation of high-performance structural adhesives for metal-to-metal and composite bonding in automotive and aviation.
• Advanced Coating Systems: Basis for coatings requiring extreme heat resistance, chemical inertness, and low smoke emission.
• Modifier for Epoxy Resins: Co-reactant to enhance the glass transition temperature (Tg) and thermal degradation resistance of epoxy systems.
• Friction Materials: Used in formulations for high-performance brake pads and clutch facings.

Basic Information

Product Name	4,4'-Bismaleimidodiphenylmethane (DMX/BMI)
CAS No.	105357-11-7
Molecular Formula	C25H20N2O4
Molecular Weight	412.44 g/mol
Synonyms	BMI; Bismaleimide Monomer; 1,1'-(Methylenedi-4,1-phenylene)bismaleimide; 4,4'-Bismaleimidodiphenylmethane; N,N'-(4,4'-Diphenylmethane)bismaleimide; DMX; Tetramethyl Diphenylmethane Bismaleimide; Kerimid 601 (trade name variant).
EINECS	Contact for details

Quality Control

Our 4,4'-Bismaleimidodiphenylmethane is manufactured under a stringent quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation by FT-IR, to ensure consistent performance and reliability for your formulations. Certificates of Analysis (COA) detailing purity, melting point, and other critical parameters are provided with every shipment.

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); keep the original container tightly sealed to minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	Light yellow to yellow crystalline powder
Identification (IR)	Conforms
Melting Point	154 - 160 °C
Assay (HPLC)	≥ 98.5%
Loss on Drying	≤ 0.5%

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