Patent ID: 8043899

Claim:
A photosensitive resin composition comprising (A) 100 parts by weight of a photosensitive silicone compound described in the following (I), and (B) 0.1-20 parts by weight of a photopolymerization initiator: (I) A photosensitive silicone compound having a weight average molecular weight of 3000 or more and 10000 or less obtained in a reaction wherein, in a first step, relative to at least one silanol compound (hereinbelow, component (a)) represented by the following general formula (a), at least one compound, as component (b), selected from the group consisting of a compound (hereinbelow component (b1)) represented by the following general formula (b1) and a compound (hereinbelow component (b2)) represented by the following general formula (b2), wherein the content of component (b1) in component (b) is 10% or more to 100% or less in terms of moles, is added at a ratio of (a)/(b)=40 mol %/60 mol % to 60 mol %/40 mol %, and, as a catalyst, one or more than one compound selected from the group consisting of an alkaline earth metal hydroxide, B(OR 5 ) 3 , Al(OR 5 ) 3 , Ti(OR 5 ) 4 , Zr(OR 5 ) 4 , NH 4 F and NR 5 4 F wherein R 5 is one or more than one group selected from the group consisting of a C 1 -C 12 linear-, a C 3 -C 12 branched-, and a C 3 -C 12 cyclic-alkyl group is added at a ratio of 0.01-10% by weight relative to the total amount of said component (a) and said component (b), and then are reacted, without positively adding water, to obtain said precondensate, and in a second step, at least one selected from the group consisting of an alkaline metal hydroxide, ammonium hydroxide and tetraalkylammonium hydroxide is added, as a catalyst, at 1-20 mol % relative to the repeating unit of the precondensate synthesized in the first step, and then is condensed, without positively adding water, to obtain said photosensitive silicone compound: R 1 2 Si(OH) 2 (a) wherein R 1 is one or more than one group selected from the group consisting of a C 6 -C 12 aryl group and a C 7 -C 12 alkylaryl group, and two R 1 s may be the same or different; R 2 R 3 SiX 2 (b1) wherein R 2 is a C 2 -C 17 organic group comprising at least one group having a carbon-carbon double bond, R 3 is a C 1 -C 12 hydrocarbon group and X is a C 1 -C 12 alkoxy group, and two Xs may be the same or different; R 4 a R 3 b SiX 4-a-b (b2) wherein R 3 is a C 1 -C 12 hydrocarbon group, R 4 is a group selected from the group consisting of a C 1 -C 12 linear alkyl group, a C 3 -C 12 branched alkyl group, a C 3 -C 12 cyclic alkyl group and a fluorine-containing C 1 -C 12 hydrocarbon group, and X is a C 1 -C 12 alkoxy group, wherein a is an integer selected from 1 and 2, b is an integer selected from 0 and 1, and a+b is 2 or less, and when a is 2, two R 4 s may be the same or different.