Sulfonamido substituted acetal polymers and use thereof in photosensitive compositions and lithographic printing plates

摘要

The present invention relates to binders and photosensitive compositions comprising said binders. The binder comprises units A, B, C and D, wherein A is present in an amount of 0.5 to 15 wt.% and is of the formula B is present in an amount of 20 to 35 wt.% and is of the formula C is present in an amount of 20 to 50 wt.% and is of the formula wherein R<1> is methyl, ethyl, propyl or isopropyl, and D is present in an amount of 25 to 70 wt.% and is of the formula wherein n is an integer of from 1 to 3 and R<2>, R<3> are hydrogen or methyl and R<4> is alkyl, aralkyl or aryl.