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AssigneeMitsui Toatsu Chemicals, Inc.
InventorsMinato Karasawa, Takuji Shimizu
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A curing agent for epoxy resins, prepared by reacting 2,5- and 2,6-bis(aminomethyl)-bicyclo[2.2.1]heptanes (1 equivalent of the active hydrogen in the amino group) with an epoxy resin (a reaction product of bisphenols or a novolak resin with epichlorohydrin; an epoxy equivalent of 150-300 g/eq.; two or more epoxy groups per molecule; bisphenol-A diglycidyl ether or bisphenol-F diglycidyl ether in particular)(0.025-0.50 equivalents of the epoxy group). The reaction temperature is 40.degree.-120.degree. C. The amount of the curing agent is within the range of 20-75 parts by weight relative to 100 parts by weight of an epoxy resin to be cured. The curing agent has a high curing rate at a room temperature, and the epoxy resins cured by it have a good appearance as well as excellent adhesion, water resistance, and chemical resistance. Therefore, the curing agent is suitable for paints, civil engineering and construction materials, adhesives, casting resins, laminates, etc.
A curing agent for epoxy resins prepared by reacting 2,5- and 2,6-bis(aminomethyl)-bicyclo[2.2.1]heptanes with an epoxy resin wherein the equivalent of the epoxy group in the epoxy resin relative to one equivalent of the active hydrogen in the amino group of the 2,5 and 2,6-bis(aminomethyl)-bicyclo[2.2.1]heptanes is 0.025-0.50 and said epoxy resin is a polyglycidyl ether of a polyphenol having an epoxy equivalent of 150-600 g/eq.
Dependencies are inferred from the claim text.