Patent ID: 8338081

Claim:
An alkali developable photosensitive resin composition, comprising a photopolymerizable unsaturated compound having a structure resulting from: an addition reaction of a compound having a β-diketone moiety or a compound having a β-ketoester group, to a (meth)acryloyl group of a compound having at least two (meth)acryloyl groups and a hydroxyl group, and subsequent esterification of the hydroxyl group of the resulting addition product with a polybasic acid anhydride, wherein the compound having a β-diketone moiety is represented by general formula (I): R 1 represents an alkyl group having 1 to 20 carbon atoms; R 2 represents R 11 , OR 11 , COR 11 , SR 11 , CONR 12 R 13 , or CN; R 11 , R 12 , and R 13 each independently represent a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms, an arylalkyl group having 7 to 30 carbon atoms, or a heterocyclic group having 2 to 20 carbon atoms, in which said alkyl group, aryl group, arylalkyl group, and heterocyclic group may have a hydrogen atom substituted with OR 21 , COR 21 , SR 21 , NR 22 R 23 , CONR 22 R 23 , —NR 22 —OR 23 , —NCOR 22 —OCOR 23 , —C(═N—OR 21 )—R 22 , —C(═N—OCOR 21 )—R 22 , CN, a halogen atom, —CR 21 ═CR 22 R 23 , —CO—CR 21 ═CR 22 R 23 , a carboxyl group, or an epoxy group; R 21 , R 22 , and R 23 each independently represent a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms, an arylalkyl group having 7 to 30 carbon atoms, or a heterocyclic group having 2 to 20 carbon atoms; methylene units of an alkylene moiety of the substituents represented by R 11 , R 12 , R 13 , R 21 , R 22 , and R 23 may be interrupted by an unsaturated linkage, an ether linkage, a thioether linkage, an ester linkage, a thioester linkage, an amido linkage, or a urethane linkage at 1 to 5 sites thereof; an alkyl moiety of the substituents represented by R 11 , R 12 , R 13 , R 21 , R 22 , and R 23 may be branched or cyclic; an alkyl terminal of the substituents represented by R 11 , R 12 , R 13 , R 21 , R 22 , and R 23 may have an unsaturated bond; R 12 and R 13 , and R 22 and R 23 may be connected to each other to form a ring; R 2 may be taken together with a neighboring benzene ring to form a ring; R 3 and R 4 each independently represent R 11 , OR 11 , SR 11 , COR 11 , CONR 12 R 13 , NR 12 COR 11 , OCOR 11 , COOR 11 , SCOR 11 , OCSR 11 , COSR 11 , CSOR 11 , CN, a halogen atom, a nitro group, or a hydroxyl group; a represents an integer of 0 to 3; b represents an integer of 0 to 4; when a or b is 2 or greater, then R 3 s or R 4 s may be the same or different; and the β-diketone moiety may have either a keto-form or an enol-form.