Sulfonamido substituted acetal polymers and use thereof in photo-sensitive 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.