EP/AW Additives

Tertiary dodecyl polysulfide PSAIL PS20

PSAIL PS20 is an efficient extreme pressure additive for lubricating oils, widely used in pure and emulsified oil formulations, and is a highly effective dialkyl polysulfide. It has a highly stable tert dodecyl chain and is suitable for formulations that require high thermal stability of the product. This product is soluble in mineral oils, synthetic base oils, and most common solvents. It is insoluble in water.

Product name:  PSAIL PS20

Similar products:  TPS 20

Chemical name: Tertiary dodecyl polysulfide

Appearance: Yellow clear liquid

Flash point open cup (℃):  ≥230

Acid number (mgKOH/g):  ≤0.1

Phosphorus content (%):  7.8




Description

What is Tertiary Dodecyl Polysulfide PSAIL PS20?

PSAIL PS20 is an advanced long-chain alkyl polysulfide extreme pressure (EP) additive specifically engineered for high-performance lubricating oils and functional fluids. As a highly effective dialkyl polysulfide compound, it features a thermally stable tertiary dodecyl molecular structure that delivers exceptional performance in both pure and emulsified oil formulations. This specialty additive demonstrates excellent solubility in mineral oils, synthetic base stocks (including PAOs, esters, and Group III/IV base oils), and most common organic solvents while being completely insoluble in water. The unique chemical structure of PSAIL PS20 provides outstanding thermal stability, making it particularly suitable for demanding applications where conventional sulfur-based additives may degrade or become ineffective. Its balanced molecular design ensures compatibility with a wide range of lubricant formulations while maintaining excellent copper corrosion protection characteristics.

Features of Tertiary Dodecyl Polysulfide PSAIL PS20:

PSAIL PS20 distinguishes itself through several key technical advantages: Its highly stable tertiary dodecyl polysulfide structure provides superior thermal and oxidative stability compared to conventional sulfur carriers, enabling use in high-temperature applications up to 200°C. The additive exhibits remarkably low odor characteristics and is completely free from chloride impurities and reactive unsaturated hydrocarbons, addressing common formulation challenges associated with traditional sulfur-based EP additives. Unlike many competitive products, PSAIL PS20 demonstrates excellent copper compatibility, showing minimal corrosion in standard copper strip tests (typically achieving 1a-1b ratings per ASTM D130). The product's selective sulfur release mechanism ensures effective extreme pressure protection while minimizing corrosive wear. Additionally, its excellent solubility profile allows for easy incorporation into various base oil systems without requiring special handling or solubilizers.

Functions of Tertiary Dodecyl Polysulfide PSAIL PS20:

As a multifunctional lubricant additive, PSAIL PS20 delivers several critical performance benefits: It serves as an extremely effective extreme pressure agent, forming protective sulfide films on metal surfaces that prevent welding and scoring under severe boundary lubrication conditions (demonstrating outstanding performance in Four-Ball EP tests and FZG gear rig evaluations). The additive significantly enhances anti-wear performance, reducing friction coefficients and protecting mechanical components from adhesive wear. Its unique thermal decomposition profile provides progressive sulfur release, ensuring continuous protection across a broad temperature range. Unlike reactive sulfur compounds, PSAIL PS20 maintains excellent metal compatibility while still delivering strong EP performance, making it particularly valuable for applications involving yellow metals. The additive also demonstrates good synergy with other EP/AW additives (such as phosphorus and zinc compounds), allowing formulators to create balanced additive packages for specific performance requirements. Furthermore, its chemical stability helps maintain lubricant performance over extended service intervals.

Applications of Tertiary Dodecyl Polysulfide PSAIL PS20:

PSAIL PS20 finds extensive use across multiple industrial lubrication segments: In metalworking applications, it serves as a key component in both pure and emulsified oil formulations for processing copper and copper alloys, where its non-corrosive nature provides critical advantages. The additive is widely employed in industrial gear oils (particularly those requiring API GL-4/GL-5 performance levels) and EP-enhanced ester-based lubricants for heavy-duty applications. Cold rolling oil formulations benefit from its balanced EP performance and surface finish enhancement capabilities. The product also sees application in various specialty lubricants including wire drawing compounds, stamping fluids, and other metal forming lubricants where controlled sulfur activity is required. Additionally, PSAIL PS20 is utilized in some high-performance greases designed for extreme pressure service conditions. Its thermal stability makes it suitable for circulating oil systems operating at elevated temperatures, while its copper compatibility allows use in systems containing bronze or brass components. The additive is particularly valued in applications where conventional sulfur-phosphorus chemistry may be unsuitable due to corrosion concerns or regulatory restrictions.

Price of Tertiary Dodecyl Polysulfide PSAIL PS20:

The current price of Tertiary Dodecyl Polysulfide PSAIL PS20 may vary depending on numerous factors, including the supplier, quantity, and specific formulation requirements. For accurate and up-to-date pricing information, it is advisable to contact UNPChemicals directly.

Supplier of Tertiary Dodecyl Polysulfide PSAIL PS20:

If you are looking for Tertiary Dodecyl Polysulfide PSAIL PS20 or want to know more about the technical information, please feel free to contact UNPChemicals.

Techspecs

Chemical property of Tertiary Dodecyl Polysulfide PSAIL PS20:

Description

PSAIL PS20 is an efficient extreme pressure additive for lubricating oils, widely used in pure and emulsified oil formulations, and is a highly effective dialkyl polysulfide. It has a highly stable tert dodecyl chain and is suitable for formulations that require high thermal stability of the product. This product is soluble in mineral oils, synthetic base oils, and   most common solvents. It is insoluble in water.

Chemical name

Tertiary Dodecyl Polysulfide

Highlights

High sulfur content, reactive sulfur, not suitable for non-ferrous metals.

Chlorine free.

Good compatibility with other additives.

 

Technical parameters of Tertiary Dodecyl Polysulfide PSAIL PS20:

Item

Specification

Appearance

Yellow clear liquid

Density (20, g/cm3)

1.01

Viscosity at 40, mm2/s

133.6

Flash point (closed cup, )

≥230.0

Sulfur content (%)

30.1

 

Packaging

50kg plastic drum or 200kg steel drum (Net weight)

Handling information

Store in a cool, dry and well-ventilated warehouse.

For more information, please refer to the relevant MSDS.


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Luoyang Pacific United Petrochemical Co., Ltd.

Location

No. 113, Huayang Avenue, Baihe Town, Mengjin District, Luoyang City, Henan Province, China

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+86 16638830202