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Primary Antioxidant - Phenolic Based

PowerNox™ 4426

2,2',6,6'-tetra-tert-butyl-4,4'-methylenediphenol.
Synonym: 4,4ʹ-methylenebis (2,6-di-tertiary-butylphenol);
       Phenol, 4,4-methylenebis(2,6-bis(1,1-dimethylethyl)-
Chemical Structure
Introduction / Features
PowerNox™ 4426 has extreme low volatile. It is used for synthetic resin antioxidants due to its resisting thermal oxidation good stability.
Physical Properties
Chemical Name: 2,2',6,6'-tetra-tert-butyl-4,4'-methylenediphenol
CAS No.: 118-82-1
EINECS No.: 204-279-1
Formula: C29H44O2
Molecular Weight: 425
Melting Point(°C): 154
Relative Density[15°C, g/cm3]: 0.88
Flash point(°C): 170
Vapor Pressure[20°C, Pa]: <13
Appearance: white powder
Ash (%): Max.0.2

Solubility (20°C) % w/w
Isooctane: 4
Petroleum ether: 8
Ethanol: 6
10% NaOH: <0.01
Toluene: 33
Water: <0.01

Applications
PowerNox™ 4426 is premier multi-ring phenolic antioxidant for engine oil and industrial lubricants. It is a highly effective additive for suppressing the formation of acidic and insoluble products of oil oxidation.
PowerNox™ 4426 also has advantages as below:
- High hindered phenolic antioxidant activity
- Low volatility ensures optimum lubricant performance at high temperatures
- Inhibits deposit and sludge formation in the 1000-hour TOST and the CMA thermal    stability test
- Synergistic with zinc dithiophosphates and alkylated diphenylamines
- Nonreactive with copper, iron, lead, and silver
- Reduces total deposits in the TEOST MHT-4
Packings
PowerNox™ 4426 is supplied in net weight 20kg plastic bag.
Technical Library
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