Bismaleimide (BMI) CAS 13676-54-5 Supplier

Bismaleimide (BDM-BMI) CAS 13676-54-5

Chemical Name: 4,4′-Bismaleimidodiphenylmethane

Synonymous Names: Bismaleimide; BDM; BDM-BMI; 4,4′-Methylenebis(N-phenylmaleimide); Bis(4-maleimidophenyl)methane

CAS No.: 13676-54-5

Molecular Formula: C21H14N2O4

Molecular Weight: 358.35

Purity: ≥99%

EINECS No.: 237-163-4

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Description
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Bismaleimide (BMI) is a difunctional bismaleimide monomer supplied as a light yellow crystalline powder. It is used to produce thermosetting resin systems requiring heat resistance, mechanical strength and electrical insulation performance.

Our product is commonly used in bismaleimide resins, fiber-reinforced composites, electrical insulation materials, electronic laminates, high-temperature adhesives and modified epoxy systems.

Structural formula:

Product Description

ANALYSIS TEST	STANDARD	RESULTS
Appearance	Light yellow or yellow crystalline powder	Light yellow crystalline powder
Purity	≥99.0%	99.2%
Melting point	150℃-160℃	152℃-158℃
Acid value ,mg KOH/g	≤0.10%	0.51%
Water	≤0.10%	0.16%
Gel time s at 200 ° C ( 1 g sample)	＜300	74
Conclusion	Conforms

4,4′-Bismaleimidodiphenylmethane (BMI) Applications

Bismaleimide Resin Production

4,4′-Bismaleimidodiphenylmethane is used as a core monomer in thermosetting BMI resin systems.

Aerospace and Structural Composites

BMI resin systems based on this monomer are used as matrix materials for carbon-fiber and glass-fiber composites. Typical applications include structural components, heat-resistant composite parts and tooling materials exposed to demanding mechanical and thermal conditions.

Electrical Insulation Materials

BMI is used in heat-resistant insulating varnishes, laminates, mica-based insulation systems and molded electrical components.

Electronic Laminates

4,4′-Bismaleimidodiphenylmethane is used in resin systems for copper-clad laminates, printed circuit board materials and other electronic substrates requiring dimensional stability and heat resistance.

High-Temperature Adhesives and Coatings

BMI monomers are used in heat-resistant adhesives, protective coatings and bonding materials.

Rubber and Polymer Crosslinking

4,4′-Bismaleimidodiphenylmethane can be used as a crosslinking or co-curing component in selected rubber and polymer systems. It is used where the finished compound requires improved resistance to heat, deformation and mechanical wear.

Packaging and Storage

Packaging: Our Bismaleimide (BMI)’s packaging is 25 kg per fiber drum with a sealed polyethylene inner liner.

Storage: Store the product below 15°C in a cool, dry and dark place. Keep the package tightly sealed and protect it from moisture, direct sunlight and heat.