US 12,473,428 B2
Epoxy resin mixture, epoxy resin composition and cured product of same
Yusuke Kawano, Tokyo (JP); and Masataka Nakanishi, Tokyo (JP)
Assigned to NIPPON KAYAKU KABUSHIKI KAISHA, Tokyo (JP)
Appl. No. 17/780,995
Filed by NIPPON KAYAKU KABUSHIKI KAISHA, Tokyo (JP)
PCT Filed Jan. 20, 2021, PCT No. PCT/JP2021/001905
§ 371(c)(1), (2) Date May 30, 2022,
PCT Pub. No. WO2021/149736, PCT Pub. Date Jul. 29, 2021.
Claims priority of application No. 2020-008404 (JP), filed on Jan. 22, 2020.
Prior Publication US 2022/0411627 A1, Dec. 29, 2022
Int. Cl. C08L 63/00 (2006.01); C08G 59/06 (2006.01); C08G 59/50 (2006.01); C08J 5/04 (2006.01); C08J 5/24 (2006.01)
CPC C08L 63/00 (2013.01) [C08G 59/063 (2013.01); C08G 59/50 (2013.01); C08J 5/042 (2013.01); C08J 5/243 (2021.05); C08J 2363/00 (2013.01)] 9 Claims
 
1. An epoxy resin mixture which contains an epoxy resin represented by Formula (1) below and an epoxy resin represented by Formula (2) below at a weight ratio of 1:5 to 1:0.2,

OG Complex Work Unit Chemistry
in Formula (1), plural R1's each exist independently and represent a hydrogen atom or a C1-10 alkyl group, n represents a real number of 1 to 10, and G represents a substituted or unsubstituted glycidyl group, and

OG Complex Work Unit Chemistry
in Formula (2), plural R2's and R3's each exist independently and represent a hydrogen atom or a C1-10 alkyl group, n represents a real number of 1 to 10, and G represents a substituted or unsubstituted glycidyl group,
wherein the epoxy resin mixture is obtained through a reaction between a phenolic resin represented by Formula (3) below, a phenolic resin represented by Formula (4) below, and an epihalohydrin,

OG Complex Work Unit Chemistry
in Formula (3), plural R1's each exist independently and represent a hydrogen atom or a C1-10 alkyl group, and n represents a real number of 1 to 10, a total content of a component represented by n=1 and a component represented by n=3 as measured by gel permeation chromatography is greater than or equal to 1% by area and less than 20% by area, a total content of a component represented by n=2 and a component represented by n=4 as measured by gel permeation chromatography is greater than or equal to 25% by area and less than 80% by area, and

OG Complex Work Unit Chemistry
in Formula (4), plural R2's and R3's each exist independently and represent a hydrogen atom or a C1-10 alkyl group, and n represents a real number of 1 to 10.