BROMINATED EPOXY FLAME RETARDANT
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Category：Paint chemicals Own Brand：MT /MOQ:100KG /From China/ B2B only.
Introduction
Brominated epoxy resin flame retardant is an epoxy resin flame retardant with high bromine content. It can be used in various engineering plastics such as PP, PA, PE, PS, ABS, PET and PBT, etc. The thermal stability, chemical resistance and dimensional stability of the finished products after the reaction are better than those of the traditional flame retardants (TBBA).
Brominated Epoxy Flame Retardant: Overview and Key Properties
| Category | Details |
|---|---|
| Chemical Type | Brominated aromatic epoxy oligomer |
| Bromine Content | 48-52% (typical) |
| CAS Number | Varies by product (e.g., 68928-70-1) |
| Appearance | Light yellow to amber powder/solid |
| Thermal Stability | Decomposes at 300-350°C |
Key Technical Specifications
| Property | Value/Range |
|---|---|
| Molecular Weight | 1.000-5.000 g/mol |
| Melting Point | 70-120°C (product dependent) |
| Bromine Content | 48-52 wt% |
| Epoxy Equivalent Weight | 350-450 g/eq |
| Decomposition Temp. | 300°C+ |
Flame Retardant Performance
| Parameter | Effectiveness |
|---|---|
| UL94 Rating | V0 achievable at 15-20% loading |
| LOI (%) | 28-32 (with 20% loading) |
| Synergists | Often used with Sb₂O₃ (1:2-1:3 ratio) |
Applications
| Application Area | Typical Uses |
|---|---|
| Printed Circuit Boards | FR-4 laminates |
| Electronic Encapsulation | Semiconductor packaging |
| Electrical Components | Connectors, housings |
| Automotive Electronics | Under-hood components |
Processing Characteristics
| Processing Method | Conditions |
|---|---|
| Epoxy Formulation | 120-150°C mixing |
| Curing | 150-180°C for 1-2 hours |
| Compatibilization | Requires dispersion aids |
Regulatory Status
| Regulation | Compliance Status |
|---|---|
| RoHS | Exempted for PCBs (Annex III) |
| REACH | Registered |
| TSCA | Listed |
| WEEE | Compliant with marking |
Advantages vs. Limitations
| Advantages | Limitations |
|---|---|
| Excellent FR efficiency | Potential dioxin risk during combustion |
| Good electrical properties | May affect CTI performance |
| Thermal stability | Color limitations |
Comparison with Alternatives
| Flame Retardant | Brominated Epoxy vs. |
|---|---|
| Phosphorus-based | Better electrical properties |
| Mineral FRs | Higher efficiency at lower loading |
| Polymer FRs | Better compatibility |
Environmental & Safety Data
| Parameter | Value |
|---|---|
| LD50 (oral rat) | >2.000 mg/kg |
| Biodegradability | Not readily biodegradable |
| Ecotoxicity | Moderate aquatic toxicity |
Summary
Brominated epoxy flame retardants remain essential for high-performance electronic applications despite environmental concerns. Their balance of flame retardancy (achieving UL94 V0 at 15-20% loading) and electrical properties makes them irreplaceable for PCB laminates. Ongoing developments focus on reduced environmental impact through improved thermal stability and recycling compatibility.
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