Polymer for heat-sensitive lithographic printing plate precursor
AssigneeAgfa Graphics NV
InventorsBert Groenendaal, Johan Loccufier, Huub Van Aert, Marc Van Damme
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Abstract
A polymer for a heat-sensitive lithographic printing plate precursor is disclosed wherein the polymer comprises a phenolic monomeric unit wherein the H atom of the hydroxy group of the phenyl group of the phenolic monomeric unit is replaced by a group comprising a N-imide group and wherein the substitution of the polymer increases the chemical resistance of the coating of the printing plate precursor.
Claims50
A polymer comprising a phenolic monomeric unit wherein the H atom of the hydroxy group of the phenolic monomeric unit is replaced by a N-imide group Q having the structure
- wherein L is a linking group, wherein k is 0 or 1, wherein L is covalently bound to the O atom of the polymer when k is 1, or wherein the N atom of the N-imide group is covalently bound to the O atom of the polymer when k is 0, wherein X or Y are independently selected from O or S, and wherein T1 and T2 represent a terminal group.
A heat-sensitive lithographic printing plate precursor comprising a support having a hydrophilic surface and an oleophilic coating provided on the hydrophilic surface, said coating comprising an infrared light absorbing agent and a polymer comprising a phenolic monomeric unit wherein the H atom of the hydroxy group of the phenolic monomeric unit is replaced by a N-imide group Q having the structure
- wherein L is a linking group, wherein k is 0 or 1, wherein L is covalently bound to the O atom of the polymer when k is 1, or wherein the N atom of the N-imide group is covalently bound to the O atom of the polymer when k is 0, wherein X or Y are independently selected from O or S, and wherein T1 and T2 represent a terminal group.
Dependencies are inferred from the claim text.