Phosphate Esters for Metalworking

Phosphate Esters for Metalworking


Phosphate esters find application in the formulation of metal working as versatile multipurpose additives. The capability to modify their characteristics by selecting the optimum hydrophobe, ethylene oxide content and monoester to diester ratio allows products with the optimum surface-active properties to be provided for a wide range of metalworking fluid applications.

Monoester Diester

R = Alkyl (C8 – C18) or Aryl n = 0 to 6 (typically)


Their key characteristics are: • Emulsification • Lubrication / Extreme pressure additive • Corrosion inhibition • Low foaming • Detergency • Hydrotropes


These characteristics can be optimized for use in the formulation of a wide range of metalworking products including: • Neat oils • Soluble oils • Semisynthetic MWF • Synthetic MWF • Metal cleaning formulation


Typical products used in the formulation of metalworking fluids include:

Lanphos PE74 - oil soluble phosphate ester which is a highly effective emulsifier that provides excellent lubrication in both oil and water based systems, in addition, it imparts good anticorrosion properties and low foaming characteristics to water based lubricant systems. Lanphos PE74 can best be used in the formulation soluble oils and semi synthetic metalworking fluids, but can also be used in neat oils.

Lanphos TEP4 – water soluble phosphate ester which is a highly effective lubricant for water based systems, imparting good anticorrosion properties and very low foaming characteristics to water based lubricant systems. Lanphos TEP4 can be used in the formulation of synthetic metalworking fluids, Lanphos TEP4 also provides hydrotrope properties and can be sued in the formulation of highly built metal cleaning products.

Lanphos PE35 – oil soluble phosphate ester with moderate water solubility with good emulsification characteristics that provides good lubrication in both oil and water based systems, in addition, it imparts good anticorrosion properties and low foaming characteristics to water based lubricant systems. Lanphos PE35 can best be used in the formulation soluble oils and semi synthetic and synthetic metalworking fluids, particularly for aluminium cutting and forming fluids. Lanphos PE35 can also be used in the formulation of highly built metal cleaning products often in combination with Lanphos TEP4.

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