Patent ID: 8603453

Claim:
A composition comprising: (i) an anti-microbial agent comprising a polymeric biguanide, alone or in combination with at least one other microbiologically active component selected from the group consisting of quaternary ammonium compounds, monoquaternary heterocyclic amine salts, urea derivatives, amino compounds, imidazole derivatives, nitrile compounds, tin compounds or complexes, isothiazolin-3-ones, thiazole derivatives, nitro compounds, iodine compounds, aldehyde release agents, thiones, triazine derivatives, oxazolidine and derivatives thereof, furan and derivatives thereof, carboxylic acids and the salts and esters thereof, phenol and derivatives thereof, sulphone derivatives, imides, thioamides, 2-mercapto-pyridine-N-oxide, azole fungicides, strobilurins, amides, carbamates, pyridine derivatives, compounds with active halogen groups, and organometallic compounds; wherein the polymeric biguanide is a linear polymeric biguanide comprising a mixture of polymer chains in which the individual polymer chains excluding the terminating groups contain at least one recurring unit having two biguanide groups of Formula (4): wherein d and e represent bridging groups which may be the same or different and in which together the total of the number of carbon atoms directly interposed between the pairs of nitrogen atoms linked by d plus the number of carbon atoms directly interposed between the pairs of nitrogen atoms linked by e is more than 9 and less than 17; and (ii) an acidic co-polymer of the Formula (1) wherein: [A] is of Formula (9), [B] is of Formula (10), L in [B] comprises a group of the Formula: [C] is of Formula (12), [G] in [C] is of the Formula: wherein d′ is 2, 3, 4 or 5; wherein: [X] is of Formula (11), wherein [A], [B] and [C] may occur in any order; T is a group of the Formula —C(O)OR 6 , wherein R 6 is C 1-10 -alkyl; L and G each independently is an optionally substituted linking group; R 1 , R 2 and R 3 are each independently H, C 1-20 -alkyl or C 3-20 -cycloalkyl; R 4 and R 5 are each independently H or C 1-4 -alkyl; q is 15 to 1000; p is 3 to 50; J is an optionally substituted hydrocarbyl group; F is an acidic substituent; b is 0, 1, or 2; m is 1 to 350; n is 1 to 75; v is 1 to 100; and w is 1 to 4; provided that at least one of R 4 and R 5 is H and provided that R 1 , R 2 , R 3 , T, L, J and G do not contain a basic group; and wherein the pka value of the acidic substituent F on the monomer from which [C] is derived is less than 5.5 and wherein acidic substituent [F] comprises a carboxylic acid, a sulphonic acid, a phosphonic acid, or a phosphoric acid.