Pour Point Depressants
Pour point depressants (PPDs) are chemical additives used in petroleum products to improve their ability to flow at low temperatures. They work by modifying the formation and growth of wax crystals, helping oils remain pumpable in cold conditions.
What Is the Pour Point?
The pour point is the lowest temperature at which an oil will still flow under standardized test conditions. As temperatures drop, wax naturally present in many petroleum oils begins to crystallize, which can make the oil too thick to flow.
PPDs lower the pour point, allowing the fluid to remain usable at lower temperatures.
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