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A bonded can having a high hot water resistance, which consists of a metal material having both the confronting side edges bonded together by a linear polyamide adhesive through an epoxy-phenolic resin undercoating composition, wherein said epoxy-phenolic resin undercoating composition comprises 50

A bonded can having a high hot water resistance, which consists of a metal material having both the confronting side edges bonded together by a linear polyamide adhesive through an epoxy-phenolic resin undercoating composition, wherein said epoxy-phenolic resin undercoating composition comprises 50 to 95% by weight of an epoxy resin having a number average molecular weight of 800 to 5500, which is obtained by condensation of an epihalohydrin with bisphenol A, and 5 to 50% by weight of a resol-type phenol-aldehyde resin having a number average molecular weight of 200 to 1000, which is obtained by reacting a mixed phenol comprising 65 to 98% by weight of a dihydric phenol represented by the following general formula: [Figure] wherein R stands for a bridging group or is a direct bond, and 2 to 35% by weight of a monohydric phenol, with an aldehyde in the presence of a basic catalyst. This bonded can can resist retort sterilization conducted at 122°to 135°C. without substantial reduction of the peel strength of the bonded portion.

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A bonded can adapted to be subjected to a retort sterilization treatment, which consists of a metal material having both the confronting side edges bonded together by a linear polyamide adhesive through an epoxy-phenolic resin undercoating composition, wherein said epoxy-phenolic resin undercoating

A bonded can adapted to be subjected to a retort sterilization treatment, which consists of a metal material having both the confronting side edges bonded together by a linear polyamide adhesive through an epoxy-phenolic resin undercoating composition, wherein said epoxy-phenolic resin undercoating composition comprises 50 to 95% by weight of an epoxy resin having a number average molecular weight of 800 to 5500, which is obtained by condensation of an epihalohydrin with bisphenol A, and 5 to 50% by weight of a resol-type phenol-aldehyde resin having a number average molecular weight of 200 to 1000, which is obtained by reacting a mixed phenol comprising 65 to 98% by weight of a dihydric phenol represented by the following general formula: [Figure] wherein R stands for a bridging group or is a direct bond, and 2 to 35% by weight of a monohydric phenol with an aldehyde in the presence of a basic catalyst. An undercoating composition for production of bonded cans to be subject to a retort sterlization treatment, which comprises 50 to 95% by weight of an epoxy resin having a number average molecular weight of 800 to 5500, which is obtained by condensation of an epihalohydrin with bisphenol A, and 5 to 50% by weight of a resol-type phenol-aldehyde resin having a number average molecular weight of 200 to 1000, which is obtained by reacting a mixed phenol comprising 65 to 98% by weight of a dihydric phenol represented by the following general formula: [Figure] wherein R stands for a bridging group or is a direct bond, and 2 to 35% by weight of a monohydric phenol with an aldehyde in the presence of a basic catalyst.