Degradable crosslinking agent

A degradable cross-linking agent, comprising a compound represented by the following formula (1):

• wherein
• -
• n
• ⁢
• ≥
• 1
• ,
• k
• ≥
• 0
• ,
• m
• ≥
• 0
• ,
• p
• ⁢
• 1
• ≥
• 1
• ,
• p
• ⁢
• 2
• ≥
• 1
• ,
• and
• ⁢
• p
• ⁢
• 3
• ≥
• 1
• ;
• R1, R2, and R3 each independently represent a single bond or a C1-C500 hydrocarbon group optionally containing a substituent or a heteroatom;
• Q1, Q2, and Q3 each independently represent at least one reactive functional group selected from the group consisting of a hydroxy group, an amino group, a thiol group, a hydrazide group, a carboxylic acid group, an acid anhydride group, a vinyl group, an allyl group, an acrylate group, a methacrylate group, a crotonate group, an isoprenyl group, an acrylamide group, a methacrylamide group, a crotonamide group, an epoxy group, an oxetane group, an oxazoline group, an isocyanate group, a carbodiimide group, a methylol group, a silanol group, a hydroxysilyl group, and an alkoxysilyl group;
• each A independently represents a carbonyl group or a single bond;
• and
• each Z independently represents a divalent or higher-valent group containing a siloxane structure or a C1-C500 hydrocarbon group optionally containing a heteroatom,
• the degradable cross-linking agent, when subjected to a reaction with an oxidizing agent after cross-linking, generating at least one water-soluble degradation product comprising a Z-containing carboxylic acid, a Z-containing alcohol, a Z-containing amine, or a Z-containing thiol and having a water solubility of 30 g/L or more.