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Highly effective phenolic antioxidant for long-term thermal and oxidative stability.
Low volatility and excellent compatibility with polyolefins, elastomers, and engineering thermoplastics.
Non-staining and non-discoloring—ideal for light-colored and transparent polymer applications.
Good hydrolytic stability under processing and end-use conditions.
Meets major regulatory requirements including FDA 21 CFR §178.2010 and EU Regulation (EC) No 10/2011 for food-contact plastics.
Polypropylene (PP) fibers and injection-molded automotive components.
Polyethylene (PE) pipes and geomembranes exposed to outdoor UV and thermal stress.
Thermoplastic elastomers (TPEs) used in medical tubing and consumer goods.
Recycled polyolefin compounds requiring robust stabilization against reprocessing degradation.
Wire & cable insulation materials demanding long-term electrical property retention.
| Chemical Type | Sterically hindered phenolic antioxidant |
| Product Form | Free-flowing white to off-white granules |
| Appearance | Free-flowing granular solid |
| Melting Range | 115–125 °C |
| Assay (by HPLC) | ≥ 99.0% |
| Heavy Metals (as Pb) | < 5 ppm |
| Loss on Drying (105 °C, 2 h) | < 0.3% |
| Primary Applications | Polyolefins, TPEs, engineering plastics |
Q1: What is the primary function of Bruggolen H164 in polymer systems?
A: Bruggolen H164 is a high-performance hindered phenolic antioxidant designed to protect polymers—especially polyolefins such as PP and PE—against thermo-oxidative degradation during processing and long-term service life. It acts primarily by scavenging free radicals formed under heat and shear stress.
Q2: Is Bruggolen H164 suitable for food-contact or pharmaceutical-grade applications?
A: Bruggolen H164 is formulated for industrial and technical polymer stabilization. While it may be evaluated for certain regulated applications, its suitability for food-contact or pharmaceutical use depends on final formulation compliance, regulatory review, and end-product testing—not on the additive alone. Users must conduct full regulatory due diligence per target market requirements.
Q3: How does Bruggolen H164 compare to other phenolic antioxidants in terms of volatility and extraction resistance?
A: Bruggolen H164 offers improved thermal stability and lower volatility compared to many conventional low-molecular-weight phenolics, contributing to better retention during high-temperature processing. Its molecular structure also enhances resistance to extraction in non-polar media, supporting longer-lasting protection in demanding environments.
Q4: Can Bruggolen H164 be used in combination with phosphite co-stabilizers?
A: Yes, Bruggolen H164 is commonly used synergistically with phosphites (e.g., tris(nonylphenyl) phosphite) to provide comprehensive stabilization—combining radical scavenging with peroxide decomposition. Compatibility and performance should be verified experimentally for each specific polymer matrix and processing condition.
Q5: What is the typical dosage range for Bruggolen H164 in polyolefin applications?
A: Dosage depends on polymer type, processing conditions, and performance requirements, but Bruggolen H164 is typically used at low concentrations—generally ranging from 0.1% to 2% by weight—often in combination with other stabilizers to achieve optimal cost-performance balance.
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