PAG Structure: How Other Lubricants Compare

The chemical structure of Idemitsu's Daphne Hermetic PAG series has proved it to be a superior formulation when compared to ordinary PAG and ester oils.

Ordinary, open-ended PAG molecules, are quite chemically active. Typical PAG products are formulated by capping one end of the main carbon chain. The lubricants in the Daphne Hermetic PAG series, however, are formulated with both ends capped, making chemically inactive and very stable. This critical structural difference is responsible for the chemical stability of our PAG oil.

This chemical stability is also a critical factor in comparing Daphne Hermetic PAG with the chemical structure of ester oils. The base components of ester oil are organic acid and alcohol. When exposed to high levels of moisture and heat (as typically exist in automotive engines), ester oil can hydrolyze. Hydrolysis causes a reverse reaction, causing the ester oil to revert back to its original organic acid and alcohol components. Although they are hygroscopic, Daphne Hermetic PAG oils are very tolerant of moisture even at high temperatures and will not react to form harmful acids.

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