DuPont Krytox lubricants Composition
Krytox Fluorinated Oils Lubricants
Krytox fluorinated oils are a series of low molecular weight fluorine end-capped homopolymers of hexafluoropropylene epoxide with the following chemical structure:
where n = 10–60
The polymer chain is completely saturated and contains only the elements carbon, oxygen and fluorine . There is no hydrogen present . On a weight basis, Krytox oil typically contains 21 .6% carbon, 9 .4% oxygen and 69 .0% fluorine .
The Chemical Abstracts Index name for Krytox is oxirane, trifluoro (trifluoromethyl)-, homopolymer . The CAS Registry Number is 60164-51-4 .
Krytox Grease Lubricants
Standard Krytox grease is formed by blending PFPE base oil with polytetrafluoroethylene (PTFE) powder with the following chemical structure:
Using a fluorinated thickener gives the grease a similar temperature and chemical stability as the base oil, allowing it to be used also in harsh, demanding conditions. The point of adding thickener is to hold the oil near the contact point . The thickener provides a barrier to keep the oil from flowing away from the contact point, allowing for adequate long-term lubrication without the need of a complicated oil recirculation system . The CAS Registry Number for PTFE is 9002-84-0 .
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