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Tribromoneopentyl Alcohol is a high-purity reactive brominated intermediate and flame retardant core material, distinguished by its bromine content of ≈70% and reactive hydroxyl group (-OH). Unlike non-reactive brominated additives, it covalently bonds with resin matrices (e.g., unsaturated polyester, polyurethane) during synthesis, ensuring permanent flame retardancy without migration or leaching. With a melting point of ≈100℃ and excellent solubility in organic solvents (e.g., acetone, ethylene glycol), it integrates seamlessly into resin production processes. Its decomposition temperature >260℃ maintains stability during resin curing (120–200℃), making it ideal for fiberglass-reinforced composites (FRP), flame-retardant resins, and specialty polymer synthesis. Compliant with RoHS 2.0 and REACH SVHC, it is widely used in automotive composites, building materials, and electrical insulation where long-term fire safety and environmental compliance are critical.
At the core of its performance is a bromine content of ≈70% —one of the highest among reactive brominated intermediates. When bonded to resins, it releases bromine radicals during combustion that rapidly interrupt the combustion chain reaction, while its branched neopentyl structure enhances char formation in the condensed phase. This dual mechanism enables unsaturated polyester FRP to achieve UL94 V-0 (1.6mm thickness) with addition levels as low as 8–10%, outperforming non-reactive flame retardants that require 15–20% addition. For example, FRP boat hulls with 9% Tribromoneopentyl Alcohol resist ignition from gasoline spills and meet IMO Resolution A.653(16) (maritime fire safety standards).
The hydroxyl group (-OH) in Tribromoneopentyl Alcohol reacts with isocyanate (in polyurethane) or carboxyl (in unsaturated polyester) groups, forming covalent bonds with the resin backbone. This integration eliminates migration, blooming (surface whitening), or leaching—even after 1,000 hours of aging at 85℃/85% RH (per ISO 815). For instance, polyurethane foam synthesized with this intermediate retains UL94 HF-1 rating without bromine loss, making it suitable for long-service-life products like automotive seat cushions and furniture foam.
With a purity of ≥99.0% (by gas chromatography), Tribromoneopentyl Alcohol minimizes impurities that could disrupt resin curing or degrade material performance. Its low moisture content (<0.1% at 23℃) prevents hydrolysis during storage, ensuring consistent batch-to-batch quality. During resin synthesis (e.g., unsaturated polyester production), it melts uniformly at ≈100℃ and mixes with monomers without agglomeration—reducing production defects (e.g., bubble formation in FRP). This stability also extends to processing equipment, as it does not release corrosive byproducts (e.g., hydrogen bromide) below 260℃.
Fully compliant with RoHS 2.0 (2011/65/EU) and REACH SVHC (no listed substances), Tribromoneopentyl Alcohol contains no polybrominated diphenyl ethers (PBDEs) or heavy metals. It exhibits low acute toxicity (LD50 >5,000 mg/kg in oral rat tests) and emits <30 ppm hydrogen bromide (HBr) during combustion (per ASTM D635-14)—40% less than traditional additive brominated flame retardants. This makes it safe for enclosed spaces like aircraft cabins and residential buildings, aligning with global environmental regulations.
| Item | Specification |
| CAS Number | 36483-62-2 |
| Molecular Formula | C₅H₉Br₃O |
| Molecular Weight | 324.84 g/mol |
| Bromine Content | ≈70% (by weight, verified via titration) |
| Functional Group | Hydroxyl (-OH) (reactive site for resin copolymerization) |
| Appearance | White crystalline solid (no visible impurities, high purity) |
| Purity | ≥99.0% (by GC, ensuring minimal process interference) |
| Melting Point | ≈100℃ (range: 98–102℃, per ASTM D127) |
| Decomposition Temperature | >260℃ (5% weight loss, TGA under N₂ at 10℃/min) |
| Solubility | 200 g/L in acetone, 180 g/L in MEK, 50 g/L in ethylene glycol; <1 g/L in water (23℃, prevents hydrolysis) |
| Particle Size | D50 ≈50–100 μm (easy to dissolve in organic solvents) |
Tribromoneopentyl Alcohol is a key intermediate in unsaturated polyester FRP for marine, building, and electrical applications. When added at 8–9% during resin synthesis, it enables FRP boat hulls to meet IMO A.653(16) (maritime fire safety) and resist gasoline ignition—critical for offshore vessels. For building FRP panels (e.g., exterior wall cladding), it achieves GB/T 8624-2012 (B1 grade) and withstands 1,000 hours of UV aging without losing flame retardancy. In electrical FRP enclosures, it provides UL94 V-0 protection and electrical insulation (volume resistivity >10¹⁴ Ω·cm), suitable for high-voltage equipment.
In polyurethane (PU) resins, it is used to synthesize flame-retardant polyols for rigid foam insulation and flexible foam. Rigid PU foam with 11% of this intermediate meets ASTM E84 (Class A fire rating) for building insulation, with a thermal conductivity of ≈0.023 W/(m·K)—maintaining energy efficiency. For automotive flexible PU seat cushions, it complies with FMVSS 302 and retains comfort (indentation force deflection ≈300 N) while preventing fire spread. Its permanent bonding also eliminates foam “blooming,” ensuring long-term aesthetic appeal.
Epoxy adhesives for electronic components (e.g., PCB bonding) use Tribromoneopentyl Alcohol to achieve flame retardancy. The adhesive with 10% of this intermediate achieves UL94 V-0 and has a shear strength of ≈15 MPa (on aluminum substrates)—ensuring strong, fire-safe bonding. In epoxy laminates (PCB substrates), it enables compliance with IEC 61249-2-21 and increases the glass transition temperature (Tg) to ≈130℃, suitable for high-temperature LED drivers and industrial controllers.
As a chemical intermediate, it is used to synthesize high-performance flame-retardant monomers (e.g., tribromoneopentyl acrylate, tribromoneopentyl phosphate). These monomers are integrated into acrylic resins and polycarbonates for aerospace interiors and transparent flame-retardant plastics. For example, tribromoneopentyl acrylate synthesized from this alcohol is used in aircraft cabin coatings, meeting FAR 25.853 (low smoke and toxicity) standards.
It has a high bromine content of ≈70%, enabling UL94 V-0 at 8–10% addition in FRP.
Its hydroxyl group forms covalent bonds with resins, ensuring permanent flame retardancy without migration.
Yes, it complies with RoHS 2.0 and REACH SVHC, with low toxicity and minimal HBr emission.
It works with unsaturated polyester, polyurethane, epoxy, and vinyl ester resins.
