US 12,305,004 B2
Cationically polymerizable composition
Kazuya Suwa, Chiba (JP)
Assigned to JNC CORPORATION, Tokyo (JP)
Filed by JNC CORPORATION, Tokyo (JP)
Filed on Mar. 29, 2021, as Appl. No. 17/216,611.
Claims priority of application No. 2020-059788 (JP), filed on Mar. 30, 2020.
Prior Publication US 2021/0301087 A1, Sep. 30, 2021
Int. Cl. C09D 183/06 (2006.01); C08G 77/12 (2006.01); C08G 77/18 (2006.01)
CPC C08G 77/18 (2013.01) [C08G 77/12 (2013.01); C09D 183/06 (2013.01); C08G 2150/00 (2013.01); Y10T 428/31663 (2015.04)] 3 Claims
 
1. A cationically polymerizable composition including a compound (A) represented by Formula (2), a cationically polymerizable compound (B), a compound (C) having a vinyl group and a cationically polymerizable cyclic ether, and a chelate-modified epoxy resin (D):

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wherein the compound (C) is a compound represented by Formula (4):

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the cationically polymerizable compound (B) contains a compound represented by Formula (B-1) and a compound represented by Formula (B-2),

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the chelate-modified epoxy resin (D) includes phosphate ester and is produced via reaction of a bisphenol A epoxy resin with phosphoric acid, and an amount of epoxy group/phosphate group is 28 to 33, an epoxy equivalent is 290 to 320 g/eq, and a phosphate equivalent is 8000 to 11000 g/eq,
with respect to a total amount of (A) to (D), a content of the compound (A) represented by Formula (1) is 5 to 30 mass %, a content of the compound (C) having a vinyl group and a cyclic ether is 10 to 30 mass %, a content of the chelate-modified epoxy resin (D) is 10 to 50 mass %, and a content of the cationically polymerizable compound (B) is the remaining component ratio,
a ratio between the content (mass %) of the compound represented by Formula (B-1) and the content (mass %) of the compound represented by Formula (B-2) is 5:1 to 2:1.