Patent ID: 8034892

Claim:
A biocidal polymer consisting essentially of at least one repeating unit of formula (A) and at least one repeating unit of formula (B): wherein, in formula (A): R 1 in each occurrence independently represents a divalent aromatic group containing 6 to 30 carbon atoms, a C 2 -C 16 alkylene group or an alkylene biscyclohexyl; Y in each occurrence independently represents an oxygen atom or a sulfur atom; and Z 1 , Z 2 , Z 3 and Z 4 in each occurrence independently represent a hydrogen atom or a halogen atom; wherein at least one of Z 1 , Z 2 , Z 3 and Z 4 in the at least one repeating unit of formula (A) is a halogen atom; wherein, in formula (B): R 1 in each occurrence is the same as that defined in formula (A); R 2 in each occurrence independently is a group represented by a formula selected from; wherein: R 3 is an ethylene group, and n 1 is an integer ranging from 1 to 227; or R 3 is a propylene group, and n 1 is an integer ranging from 1 to 172; or R 3 is a tetramethylene group, and n 1 is an integer ranging from 1 to 138; —O—R 4 —O—, (ii) wherein: R 4 is a C 2 -C 16 alkylene group; wherein: R 5 represents a C 2 -C 16 alkylene group, divalent aromatic group containing 6 to 30 carbon atoms, an alkylene biscyclohexyl group, wherein: R 6 , R 7 and R 8 independently represent a C 2 -C 16 alkylene group, and n 2 is an integer ranging from 1 to 46; and wherein: R 9 and R 11 independently represent a C 2 -C 16 alkylene group, R 10 represents a C 2 -C 16 alkylene group or —R 12 —O—R 13 , R 12 and R 13 independently represent a C 2 -C 4 alkylene group, and n 3 and n 4 independently are an integer ranging from 1 to 86; and Z 5 and Z 6 in each occurrence independently represent a hydrogen atom or a halogen atom; wherein in the biocidal polymer, the molar ratio of the at least one repeating unit of formula (A) to the at least one repeating unit of formula (B) is in a range of 0.003:0.997 to 0.999:0.001; and wherein the biocidal polymer has an average weight molecular weight ranging from 500 to 2,000,000.