NAUGARD™ 445 Granular is an excellent-performance amine antioxidant with significant synergy with phenolics, particularly effective in extreme heat and oxygen environments.
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NAUGARD™ 445 granular is an aromatic amine antioxidant and heat stabilizer for rubber and plastic. NAUGARD™ 445 amine antioxidant is featured with excellent stability, color retention, and ultra-low volatility.
NAUGARD™ 445 provides exceptional protection to polymer systems, including plastics, elastomers, coatings, adhesives, and various other applications. It also offers protection from peroxide degradation and scorching during the processing of polyurethane and polyol systems. This antioxidant provides non-discoloring and strong synergy with other types of stabilizer packages, such as phenolics and phosphites.
Form: Granules
Color: White
CAS number: 10081-67-1
EINECS number: 233-215-5
Molecular weight: 406 g/mol
Melting point: 98°C–100°C
Color APHA: 20
Specific gravity (@ 55°C): 1.14
Flash point: 277°C
Primary Chemistry: 4,4'-Bis (α,α-dimethylbenzyl) diphenylamine
Available in granular and powder form
Advanced protection against extreme heat and oxygen
Storage stability at room temperature
Significant synergy with phenolic and phosphite antioxidants
Low volatility
Minimal susceptibility to bloom
Protection from peroxide degradation at low loading levels
Low water extractability and inherent resistance to chlorinated water
Low adsorption onto fillers
Low performance of amine oxidants in extreme temperatures and weathering conditions
Synergy with phenolic and phosphite antioxidants
High volatility of commercially available amine antioxidants
High loading rate of traditional amine antioxidants and adsorption onto fillers
Long lead time and high minimum order quantity of specialty amine antioxidants
Dusting and handling issues of powder amine antioxidants
Scorching and stability issues during the processing of foams and polyurethane products
Natural and synthetic rubber products, such as NBR, SBR, and EAM
Thermoplastic and polyolefin systems, polyurethanes, foams, spandex, and polyol formulations
Elastomeric coatings, latex, and hot-melt adhesives
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