pour-point depressant

pour-point depressant

[′pȯr ‚pȯint di‚pres·ənt]
(materials)
An additive that lowers the pour point of a wax-containing petroleum-base lubricating oil by reducing the tendency of the wax to solidify. Also known as pour depressant; pour-point inhibitor.
References in periodicals archive ?
A pour-point depressant (PPD) has also been added to the formulation, simplifying logistics for Afton customers.
In order to improve viscosity index over longer period of use certain additive such as Dispersants, anti-wear agents, friction modifiers, pour-point depressants, antioxidants and foam inhibitors are used in engine oil.