| 摘要 |
PURPOSE:A corrosion-inhibiting composition excellent in adhesion, wet surface curability, water vapor barrier property and flexibility, comprising a specified epoxy resin containing a urethane-modified epoxy resin, a difficultly water- soluble polyamine, etc. CONSTITUTION:A urethane-modified epoxy resin is obtained by reacting a compound having both epoxy and hydroxyl groups (e.g., glycidol) with an isocyanate group-terminated urethane bond-containing compound, i.e. a reaction product between a polyhydroxyl compound (e.g., polytetramethylene glycol) and a polyisocyanate compound (e.g., tolylene diisocyanate). A mixture of 40-100wt% said resin and 60-0wt% general-purpose epoxy resin is mixed with 3-230pts.wt. at least one difficultly water-soluble polyamine, polyamide or polymercaptan, e.g., m-phenylenediamine.
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