CYCLIC PHOSPHAZENE COMPOUND

摘要

The invention pertains to a cyclic phosphazene compound complying with formula (I) or (II), wherein: - R<SUB>f</SUB> and R'<SUB>f</SUB>, equal or different each other and at each occurrence, represent independently, a (per)fluoropolyoxyalkylene chain [chain (OF)] comprising (preferably consisting essentially of) recurring units R°, said recurring units, distributed randomly through the (per)fluoropolyoxyalkylene chain, being chosen among: (i) -CFXO-, wherein X is F or CF<SUB>3</SUB>, (ii) -CF<SUB>2</SUB>CFXO-, wherein X is F or CF<SUB>3</SUB>, (iii) -CF<SUB>2</SUB>CF<SUB>2</SUB>CF<SUB>2</SUB>O-, (iv) -CF<SUB>2</SUB>CF<SUB>2</SUB>CF<SUB>2</SUB>CF<SUB>2</SUB>O- - Z and Z', equal or different each other and at each occurrence, represent a polar group of formula -O<SUP>-</SUP>M<SUP>+</SUP>, wherein M is chosen among hydrogen, a monovalent metal, preferably an alkaline metal selected from Li, Na, K, an ammonium radical of formula NR <SUB>1</SUB>R<SUB>2</SUB>R<SUB>3</SUB>R<SUB>4</SUB>, wherein each of R<SUB>1</SUB>, R<SUB>2</SUB>, R<SUB>3</SUB>, R<SUB>4</SUB> is, independently, an hydrogen atom or a C<SUB>1</SUB>-C<SUB>12</SUB> hydrocarbon group, optionally fluorinated, or a polar group of formula -O<SUP>-</SUP>)<SUB>2</SUB>M'<SUP>2+</SUP>, wherein M' is a divalent metal, preferably an alkaline earth metal selected from Ca, and Mg [group (P)]; - n<SUB>Z</SUB> is an integer from 1 to 3, preferably equal to 1; - n<SUB>Z'</SUB> is an integer from 1 to 4, preferably equal to 1; n<SUB>f' </SUB> is an integer such that n<SUB>Z'</SUB> + n<SUB>f'</SUB> is equal to 8; - n<SUB>f</SUB> is an integer such that n<SUB>Z</SUB> + n<SUB>f</SUB> is equal to 6.