NAUGALUBE® 438
Aminic Antioxidant
Naugalube® 438 is an octylated diphenylamine antioxidant designed to protect mineral and synthetic base stocks typically employed in lubricant applications. Naugalube® 438 can easily be incorporated into aviation turbine oils, gear oils, hydraulic fluids, compressor oils, and greases. It is an NSF HX-1 listed ingredient for use in H1 (incidental food contact) lubricants.
Naugalube® 438 provides good protection against degradation due to heat and oxygen. High performance industrial lubricants and greases can be developed using Naugalube® 438 as the amine portion of the formulation. Naugalube® 438 may used in combination with other antioxidants such as alkylated diphenylamines, phenyl-α- naphthylamine, and hindered phenolics.
Typical treat levels range from 0.05 to 1.0 percent by weight.
- excellent high temperature performance
- low sludging properties
- solid pellet form to minimize dust
- NSF HX-1 approved
Brand
NAUGALUBE®
Discover NAUGALUBE® Antioxidants
Octylated Diphenylamine
Discover Phenyl-α-Naphthylamine (PANA) Antioxidant
Discover nonylated diphenylamine Antioxidant
FAQ
Below, you will find some of our most frequently asked questions. In case you have any question that is not answered - feel free to contact us!
Below, you will find some of our most frequently asked questions. In case you have any question that is not answered - feel free to contact us!
Antioxidants are additives used in lubricants to prevent or slow down the oxidation process, which can degrade the lubricant and reduce its effectiveness.
Antioxidants help extend the life of lubricants by increasing their oxidative resistance. This allows lubricants to perform effectively at higher temperatures and under more demanding conditions.
The undesirable chemical transformation of mineral and synthetic products (e.g. lubricants, fuels) in use and during storage is referred to as aging. The process is triggered by reactions with oxygen (producing peroxides and hydrocarbon radicals). Heat, light, and the catalytic effects of metals and other contaminants speed up oxidation, which generates acids and sludge. Substances that protect a lubricant from aging – antioxidants (AO) – delay degradation, thus extending service life.
The undesirable chemical transformation of mineral and synthetic products (e.g. lubricants, fuels) in use and during storage is referred to as aging. The process is triggered by reactions with oxygen (producing peroxides and hydrocarbon radicals). Heat, light, and the catalytic effects of metals and other contaminants speed up oxidation, which generates acids and sludge. Substances that protect a lubricant from aging – antioxidants (AO) – delay degradation, thus extending service life.
Antioxidants work by neutralizing free radicals and decomposing peroxides formed during the oxidation process. This prevents the formation of harmful by-products that can increase viscosity, form sludge, and cause corrosion.
There are two main types of antioxidants:
- Primary antioxidants (radical scavengers): These include hindered phenols and aromatic amines, which neutralize free radicals.
- Secondary antioxidants (peroxide decomposers): These include sulfur and phosphorus compounds, which transform peroxides into non-reactive products.
Corrosion inhibitors and metal passivators are sometimes classified as tertiary antioxidants because they mitigate negative interactions with metal surfaces.
LANXESS offers all three types of antioxidants:
- Primary antioxidants (radical scavengers) can be found in our Additin® RC 7xxx and Naugalube® product lines.
- Secondary antioxidants are not found under "antioxidants” directly, but as sulfur carriers and dithiophosphates. See Additin® RC 2xxx, Additin® RC 30xx, and Additin® RC 6xxx.
- For tertiary antioxidants (corrosion inhibitors for cobalt, copper, and steel), see Additin® RC 4xxx and Additin® RC 82xx.
Yes, antioxidants can interact with other additives. Some combinations have synergistic effects, enhancing the overall stability of the lubricant, while others may have antagonistic effects, reducing the effectiveness of the antioxidants. It is best practice to test specific formulations for possible interactions.
In case you need recommendations or guideline formulations for specific applications, please contact our Application Technology team.
In case you need recommendations or guideline formulations for specific applications, please contact our Application Technology team.
Many standard laboratory tests may be used to evaluate the effectiveness of antioxidants. The choice of method is often guided by knowledge of the end-use application. However, common bench-scale oxidative stability tests include pressurized differential scanning calorimetry (PDSC, ASTM D 6186) and the rotating pressure vessel oxidation test (RPVOT, ASTM D 2272). After bench tests are completed, specialized (OEM test rigs) and application-specific testing (field trials) may be necessary to fully evaluate a lubricant formulation.
This varies and depends on the application. Lubricants for less demanding conditions only require a small amount (0.05 - 0.3%), while high temperature oils require considerably more antioxidant (2 – 3%).
Our Application Technology team is happy to support you with further information.
Our Application Technology team is happy to support you with further information.