Patent ID: 7767229

Claim:
A pharmaceutical composition containing a poly(diallylamine) polymer, wherein all diallyl nitrogen atoms are linked to at least two further diallyl nitrogen atoms, said polymer comprising a repeat unit of a monomer of formula Ia: wherein R 1 and R 2 are independently selected from (CR 7 R 8 ) n , or a group CR 9 R 10 , —(CR 7 R 8 CR 9 R 10 )— or —(CR 9 R 10 CR 7 R 8 )— where n is 0, 1 or 2, R 7 and R 8 are independently selected from hydrogen or alkyl, and either (a) one of R 9 or R 10 is hydrogen and the other an electron withdrawing group given by COCH 2 CN or COCH 3 , or (b) R 9 and R 10 together form an oxo electron withdrawing group; R 3 and R 4 are independently selected from C, CH or CR 11 , where R 11 is an electron withdrawing group given by COCH 3 ; the dotted lines indicate the presence or absence of a bond, and X is a group CX 1 X 2 where the dotted line bond to which it is attached is absent and a group CX 1 where the dotted line bond to which it is attached is present, Y is a group CY 1 Y 2 where the dotted line bond to which it is attached is absent and a group CY 1 where the dotted line bond to which it is attached is present, and X 1 , X 2 , Y 1 and Y 2 are independently selected from hydrogen and fluorine; R 5 is either a bond or an electron withdrawing group; R 6 is selected from an aromatic group, a heteroaromatic group, a tetra substituted non-linear optic unit, an octa substituted non-linear optic unit, or a straight or branched chain alkyl group, optionally substituted or interposed with functional groups, a polysiloxane polymer network bridging group of valency r; r is an integer of 3 or greater; R 12 is H, or an optionally substituted hydrocarbyl group; m is a positive integer; and Z − is an anion of valency m, or a pharmaceutically acceptable derivative of such a polymer, together with a pharmaceutically acceptable excipient.