US 12,378,450 B2
Adhesive for endoscope and cured product thereof, and endoscope and method for producing the same
Kazushi Furukawa, Kanagawa (JP); and Yoshihiro Nakai, Kanagawa (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Feb. 15, 2023, as Appl. No. 18/169,330.
Application 18/169,330 is a continuation of application No. PCT/JP2021/032923, filed on Sep. 8, 2021.
Claims priority of application No. 2020-163597 (JP), filed on Sep. 29, 2020.
Prior Publication US 2023/0203353 A1, Jun. 29, 2023
Int. Cl. C09J 163/00 (2006.01); A61B 1/00 (2006.01); C09J 11/06 (2006.01)
CPC C09J 163/00 (2013.01) [A61B 1/0011 (2013.01); A61B 1/00128 (2013.01); C09J 11/06 (2013.01)] 8 Claims
 
1. An adhesive for an endoscope, comprising components (A) to (C) below,
Component (A): an epoxy resin
Component (B): an epoxy resin curing component
Component (C): a radical scavenger
wherein the component (A) includes at least one of a bisphenol A epoxy resin, a bisphenol F epoxy resin, or a phenol novolac epoxy resin,
the component (B) includes at least one of a phosphorus-containing compound, a polythiol compound, a dicyandiamide compound, a phenol compound, a polyamine compound having an unsubstituted amino group, an acid anhydride compound, or an imidazole compound, and
the component (C) includes at least one of components (C-1) to (C-7) below, Component (C-1): a compound represented by general formula (C-1) below Component (C-2): a compound represented by general formula (C-2) below Component (C-3): a compound represented by formula (C-3) below Component (C-4): a compound represented by general formula (C-4) below Component (C-5): a compound represented by general formula (C-5) below Component (C-6): a compound having a structure represented by general formula (C-6) below Component (C-7): a compound having a structure represented by general formula (C-7) below

OG Complex Work Unit Chemistry
where R1 and R2 each represent a hydrogen atom, an aliphatic group, an acyl group, an aliphatic oxycarbonyl group, an aromatic oxycarbonyl group, an aliphatic sulfonyl group, or an aromatic sulfonyl group, R3 represents an aliphatic group, an aliphatic oxy group, an aromatic oxy group, an aliphatic thio group, an aromatic thio group, an acyloxy group, an aliphatic oxycarbonyloxy group, an aromatic oxycarbonyloxy group, a substituted amino group, a heterocyclic group, or a hydroxy group, R1 and R2, R2 and R3, or R1 and R3 may be bonded to each other to form a five- to seven-membered ring but do not form a piperidine skeleton, provided that R1 and R2 are not simultaneously hydrogen atoms and have a total of 7 or more carbon atoms, and R1, R2, and R3 include no unsubstituted amino groups,

OG Complex Work Unit Chemistry
where R4 to R7 each represent a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, or an aryl group having 6 to 15 carbon atoms,

OG Complex Work Unit Chemistry
where R8 and R9 each represent an alkyl group, an aryl group, an alkoxy group, an aryloxy group, or a halogen atom, R10 represents an alkyl group or an aryl group, and at least two of R8, R9, and R10 may be linked to each other via a divalent or higher valent group or a single bond,
R11—S—R12  general formula (C-5)
where R11 and R12 each represent an alkyl group,

OG Complex Work Unit Chemistry
where R13 to R16 each represent a hydrogen atom or an alkyl group having 1 to 12 carbon atoms, R17 represents a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, or OR18, where R18 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, and * represents a bonding site, provided that R13 to R16 are not simultaneously hydrogen atoms,

OG Complex Work Unit Chemistry
where R19 and R20 each represent a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, or an aralkyl group having 7 to 36 carbon atoms, and * represents a bonding site.