Cyclic phosphazene compound

Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Organic phosphorus compound – wherein the phosphorus is...

Reexamination Certificate

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C508S424000

Reexamination Certificate

active

08063003

ABSTRACT:
A cyclic phosphazene compound complying with formula (I) or (II):wherein:Rfand R′frepresent independently a (per)fluoropolyoxyalkylene chain comprising recurring units Ro, said recurring units, distributed randomly through the (per)fluoropolyoxyalkylene chain, being chosen among; (i)—CFXO—, X being F or CF3; (ii) —CF2CFXO—, X being F or CF3; (iii) —CF2CF2CF2O—; (iv) —CF2CF2CF2CF2O—;Z and Z′ represent a polar group of formula —O−M+, M being chosen among hydrogen, a monovalent metal, or an ammonium radical of formula NR1R2R3R4, or represent a polar group of formula —O−)2M′2+, M′ being a divalent metal;nZis an integer from 1 to 3;nZ′is an integer from 1 to 4;nf′is an integer such that nZ′+nf′is equal to 8; andnfis an integer such that nZ+nfis equal to 6.

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Maccone, P, et al. “New additives for fluorinated lubricants”, 70th National Lubricating Grease Institute Annual Meeting, Hilton Head Island, South Carolina (Oct. 25-29, 2003). No.#318—11 pp.

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