US 12,122,867 B2
Photocurable resin composition and use thereof
Makoto Tai, Joetsu (JP); and Takashi Gondaira, Joetsu (JP)
Assigned to ARISAWA MFG. CO., LTD., Joetsu (JP)
Appl. No. 16/964,738
Filed by ARISAWA MFG. CO., LTD., Joetsu (JP)
PCT Filed Jan. 23, 2019, PCT No. PCT/JP2019/002126
§ 371(c)(1), (2) Date Jul. 24, 2020,
PCT Pub. No. WO2019/146657, PCT Pub. Date Aug. 1, 2019.
Claims priority of application No. 2018-012084 (JP), filed on Jan. 26, 2018; application No. 2018-025451 (JP), filed on Feb. 15, 2018; and application No. 2018-186846 (JP), filed on Oct. 1, 2018.
Prior Publication US 2020/0347177 A1, Nov. 5, 2020
Int. Cl. C08G 18/42 (2006.01); C08G 18/08 (2006.01); C08G 18/28 (2006.01); C08G 18/32 (2006.01); C08G 18/75 (2006.01); G03F 7/027 (2006.01); H05K 3/28 (2006.01)
CPC C08G 18/4263 (2013.01) [C08G 18/0819 (2013.01); C08G 18/281 (2013.01); C08G 18/3221 (2013.01); C08G 18/753 (2013.01); G03F 7/027 (2013.01); C08G 2170/00 (2013.01); H05K 3/28 (2013.01)] 17 Claims
 
1. A photocurable resin composition containing:
an anionic group-containing photosensitive resin containing at least a photosensitive urethane resin;
a photopolymerization initiator; and
a thermal curing agent,
wherein the photosensitive urethane resin is obtained by reacting a raw material mixture containing the following compounds (A) to (D):
(A) a polyol having at least an ester bond and at least an unsaturated bond in the main chain;
(B) a compound having both at least one active hydrogen-containing group and at least one anionic group in the molecule;
(C) polyisocyanate; and
(D) a compound having both at least one active hydrogen-containing group and an unsaturated bond group in the molecule, and
the photosensitive urethane resin has:
the ester bond and the unsaturated bond in the main chain in the same molecule, an amount of the unsaturated bond in the main chain of the compound (A) being 0.80 mmol/g or more;
an anionic group in at least one of side chains and ends, an amount of the anionic group contained in the anionic group-containing photosensitive resin being 0.60 mmol/g or more; and
the unsaturated bond group in the side chains.