| 摘要 |
PROBLEM TO BE SOLVED: To attain a stable adhesive strength without being impaired by ink in a printer head by blending a curing agent obtained by the reaction of an epoxy resin with a bisphenol A-type epoxy resin and an imidazole-based compound. SOLUTION: An adhesive comprises an epoxy resin and a curing agent having a structure represented by the formula. In the formula, R1 to R12 are each H, an alkyl group or an aryl group, and it is preferable that R4 , R5 , R9 and R10 are each H or -CH3 . The curing agent is used in a form in which a curing agent component of the formula is used as a nucleus, the nucleus is covered with a covering layer of, for example, polystyrene, gelatin, calcium silicate and a film of a metal such as nickel, and the particle size is 20μm or less and preferably 10μm or less. 5-30 pts.wt. curing agent is added to and dispersed into 100 pts.wt. epoxy resin. Further, it is preferable that a hard particle having a particle size greater than the particle size of the covering particle of the curing agent is employed as a bleeding controlling agent. The curing agent is cured by heat pressurizing.
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