Lubricating oil

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...

Reexamination Certificate

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C508S502000, C585S003000

Reexamination Certificate

active

07632900

ABSTRACT:
A lubricating oil suitable for use in α-olefin compressors and a high-pressure ethylene polymerization process is disclosed. The oil comprises a base fluid and a hindered C6-C30alkyl 4-hydroxybenzoate. The hindered C6-C30alkyl 4-hydroxybenzoate stabilizes the lubricating oil and does not interfere with the high-pressure α-olefin polymerization.

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