Brominated Epoxy Resin Flame Retardant

Name: Brominated Epoxy Resin Flame Retardant
Brand: Chemzip
Price: 1 USD
Availability: InStock

CAS Number: 68928-70-1

Brominated epoxy resin (BER) is a high-bromine-content reactive and additive flame retardant used in epoxy laminates, adhesives, and thermoplastics. Based on brominated bisphenol A diglycidyl ether oligomers, it integrates into the epoxy cure cycle, providing durable, non-migratory flame retardancy. BER is widely used in PCB epoxy systems, HIPS, and polyester as either a reactive component (with epoxy systems) or an additive (with thermoplastics), offering an intermediate approach between fully reactive TBBPA and additive halogen FRs.

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Technical Specifications

appearance	Pale yellow to amber solid or semi-solid
moisture (%)	<0.2
color (Gardner)	<4
bromine content (%)	48–52
softening point (°C)	65–95
epoxide equivalent weight (g/eq)	340–450

Applications

FR-4 and FR-5 epoxy PCB laminate manufacture as reactive FR component
HIPS and polystyrene compounds as additive flame retardant with Sb2O3
Epoxy powder coating resins requiring UL94 V-0 flame classification
Polyester film and fiber with brominated FR requirements
Adhesive and potting compound systems requiring halogenated FR

Key Features

Dual use as both reactive (epoxy systems) and additive (thermoplastics) FR reduces inventory complexity
High bromine content (48–52%) achieves UL94 V-0 in PCB epoxy and HIPS at practical loading levels
Reactive epoxy groups allow covalent incorporation, providing migration-resistant FR in laminate systems
Good thermal stability and compatibility with standard epoxy hardeners and HIPS processing conditions