Patent ID: 7553607

Claim:
A process for the production of a lithographic substrate comprising: (a) applying an aqueous solution comprising at least one phosphono-substituted siloxane of the general formula (I) wherein R 1 is selected from a hydrogen atom, a hydroxy group, a linear or branched C 1 -C 20 alkyl, linear or branched C 2 -C 20 alkenyl, linear or branched C 1 -C 20 alkoxy, linear or branched C 2 -C 20 alkinyl, aryl, arylalkyl, alkylaryl, arylalkenyl, alkenylaryl, arylalkinyl, alkinylaryl, acyloxy group and a group —CHR 6 —PO 3 2− , R 2 and R 3 are independently selected from a hydrogen atom, a linear or branched C 1 -C 20 alkyl, linear or branched C 2 -C 20 alkenyl, linear or branched C 2 -C 20 alkinyl, aryl, arylalkyl, alkylaryl, arylalkenyl, alkenylaryl, arylalkinyl and alkinylaryl group, R 4 is selected from a hydrogen atom, a linear or branched C 1 -C 20 alkyl, linear or branched C 2 -C 20 alkenyl, linear or branched C 2 -C 20 alkinyl, aryl, arylalkyl, alkylaryl, arylalkenyl, alkenylaryl, arylalkinyl, alkinylaryl group and the group —CHR 6 —PO 3 2− , R 5 is selected from a hydrogen atom, a linear or branched C 1 -C 20 alkyl, linear or branched C 2 -C 20 alkenyl, linear or branched C 2 -C 20 alkinyl, aryl, arylalkyl, alkylaryl, arylalkenyl, alkenylaryl, arylalkinyl, alkinylaryl group and the group —CHR 6 —PO 3 2− , Z represents —(CR 6 R 7 ) x — or arylene, or a combination of two or more thereof, R 6 and R 7 are independently selected from a hydrogen atom, a linear or branched C 1 -C 6 alkyl, linear or branched C 2 -C 6 alkenyl, linear or branched C 2 -C 6 alkinyl, aryl, arylalkyl, alkylaryl, arylalkenyl, alkenylaryl, arylalkinyl and alkinylaryl group, n is an average value and has a value from 1 to 200 and x is an integer from 1 to 100, M represents the counterion(s) needed for charge equalization and is selected from monovalent, divalent or multivalent cations, and m is the number of cations needed for charge equalization; onto a dimensionally stable plate- or foil substrate with an aluminum oxide layer; (b) drying at a temperature from 30 to 120° C.