| 摘要 |
PROBLEM TO BE SOLVED: To provide an alkali-developable photosensitive resin composition that is environmentally friendly, and a dry film and a cured material of the composition, and a printed wiring board having a cured coating of the composition.SOLUTION: The photosensitive resin composition comprises (A) a resin using a recovered polyester as a raw material, (B) a photopolymerization initiator and (C) a carboxyl group-containing photosensitive resin except for the resin (A). The resin (A) includes at least one resin selected from the following (A1), (A2) and (A3). They are: (A1) a carboxyl group-containing resin obtained by depolymerizing (a) a recovered polyester with (b) a polyol and further reacting (c) a polybasic acid or its anhydride; (A2) a (meth)acrylate photosensitive resin obtained by depolymerizing the (a) recovered polyester with the (b) polyol and then reacting a compound (d) having an ethylenically unsaturated group and a functional group that can react with an acid such as a (meth)acrylic acid or its derivative or with an alcohol; and (A3) a carboxyl group-containing resin obtained by depolymerizing the (a) recovered polyester with the (b) polyol, reacting a compound (d) having an ethylenically unsaturated group and a functional group that can react with an acid such as a (meth)acrylic acid or its derivative or with an alcohol to obtain a (meth)acrylate photosensitive resin, and further reacting the obtained resin with the (c) polybasic acid or its anhydride. |
