| 摘要 |
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; nZ is 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; and nfis an integer such that nZ+nfis equal to 6. |
