abstract |
Cyclic phosphazene compounds of formula (I): n n n wherein: n Q is a cyclic compound of formula: n n n A is an end group of the —OCF 2 X, —OC 2 F 4 X, —OC 3 F 6 X type, wherein X═F, Cl, H; n R f and R′ f are (per)fluoropolyoxyalkylene chains having a number average molecular weight in the range 280-5,000. |