Abstract: The invention shows a photosensitive resin composition which can be used in protective film and liquid crystal display element and provides good transparency and high chemical resistance. The composition includes a complex resin (A), an o-naphthoquinone diazide sulfonate (B), and a solvent (C). The complex resin (A) includes a main chain and a side chain. The main chain includes a repeating unit derived from siloxane (meth)acrylate based monomer (a1-2). The side chain includes a repeating unit derived from siloxane based monomer (a2), and is bonded to the repeating unit derived from siloxane (meth)acrylate based monomer (a1-2). The complex resin (A) satisfies at least one of the following conditions (I) and (II): Condition (I): the main chain further includes a repeating unit derived from unsaturated monomer (a1-1) including a carboxylic acid or a carboxylic anhydride. Condition (II): the siloxane based monomer (a2) includes a monomer (a2-1) represented by formula (A-4).

Abstract: The invention shows a photosensitive resin composition which can be used in protective film and liquid crystal display element and provides good transparency and high chemical resistance. The composition includes a complex resin (A), an o-naphthoquinone diazide sulfonate (B), and a solvent (C). The complex resin (A) includes a main chain and a side chain. The main chain includes a repeating unit derived from siloxane (meth)acrylate based monomer (a1-2). The side chain includes a repeating unit derived from siloxane based monomer (a2), and is bonded to the repeating unit derived from siloxane (meth)acrylate based monomer (a1-2). The complex resin (A) satisfies at least one of the following conditions (I) and (II): Condition (I): the main chain further includes a repeating unit derived from unsaturated monomer (a1-1) including a carboxylic acid or a carboxylic anhydride. Condition (II): the siloxane based monomer (a2) includes a monomer (a2-1) represented by formula (A-4).