Binders soluble in aqueous alkali and containing silanyl groups in the side chain for a photosensitive mixture

A photosensitive mixture comprising:

• a photosensitive component, and
• a silylated polymeric binder which bears a plurality of at least one of aliphatic and aromatic hydroxyl groups, at least a portion of which are derivatized by units of the formulae I and II
• [(A--B.sub.n).sub.m C]--[(D.sub.o E.sub.p)BC].sub.u -- (I)
• and
• [(D.sub.o E.sub.p)BC].sub.v -- (II),
• which are side chains of the polymeric binder, wherein
• A denotes a silanyl group containing at least 2 silicon atoms in total linked to each other, but not more than 3 silicon atoms linked to each other in an unbranched chain of silicon atoms;
• B denotes a bridging group having the formula IV:
• --b.sub.1).sub.r --(X)--(b.sub.2).sub.s --
• wherein
• b.sub.1 denotes C.sub.1 --C.sub.4)-alkylene or a group containing at least one C--C double bond and resulting from Diels-Alder reaction of an alkadienylene with a dienophile;
• X denotes a single bond, --O--, --S--, --SO.sub.2 --, --NH--, --NR.sup.1 --, ##STR13## wherein R.sup.1 is a (C.sub.1 -C.sub.3) alkyl;
• b.sub.2 denotes arylene or cycloalkylene;
• and
• r, s each denote 0 or 1, with the proviso that the bridging group B the sum of the values of r and s is at least 1;
• C denotes a functional group which has formed a covalent bond with an aromatic, aliphatic or cycloaliphatic hydroxyl group of the binder, the group D or the group E;
• D denotes a grafted monohydric or polyhydric aliphatic alcohol group;
• E denotes a grafted monohydric or polyhydric aromatic alcohol group;
• n denotes 0 or 1;
• m denotes 1 or 2;
• and
• o, p, u and y each denote 0 or 1.