| 摘要 |
A sealant composition used for cold rolled steel, galvanizer steel sheet panels and aluminum panels is provided to realize excellent adhesion and improved strength and durability at a sealed portion, and to ensure excellent impact performance. A sealant composition comprises 2-10 wt% of an epoxy resin, 1-5 wt% of a hygroscopic agent, 15-20 wt% of a filler, 2-10 wt% of conductive carbon black, 0.5-6 wt% of a curing agent, 0.1-0.5 wt% of a curing accelerator and 5-12 wt% of alkylphenol glycidyl ester as a reactive diluent. The epoxy resin comprises: (A) 10-23 wt% of an acrylic rubber-modified epoxy resin or nitrile butadiene rubber-modified epoxy resin; (B) 5-16 wt% of at least one blend selected from a silicone-modified epoxy resin, amine-terminated butadiene acrylonitrile copolymer-modified epoxy resin and carboxyl-terminated butadiene acrylonitrile copolymer-modified epoxy resin; (C) 5-16 wt% of a bisphenol F type epoxy resin or solid bisphenol A type epoxy resin; and (D) 2-10 wt% of a melt blend of polyoxypropylene diamine with a liquid bisphenol A type epoxy resin.
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