| 主权项 |
1. A curable epoxy resin composition having a viscosity suitable for Resin Transfer Molding (RTM), said composition comprising:
(a) at least one multifunctional epoxy resin having an epoxy functionality of greater than 1 and that functionality is based on glydicyl amine, or glycidyl ether, or both; (b) a hardener composition comprising:
i. at least one aliphatic or cycloaliphatic amine curing agent having one or more amino groups per molecule and capable of individually initiating a curing reaction of said at least one multifunctional epoxy resin at a cure onset temperature within the range of 30° C.-100° C. and selected from a group consisting of: isophorone diamine, triethylamine, diethylamine, triethylenetetramine (TETA), and Polyether amines;ii. at least one aromatic amine curing agent having one or more amino groups per molecule and capable of individually initiating a curing reaction of said at least one multifunctional epoxy resin at a cure onset temperature of 120° C. or greater and selected from a group consisting of, but not limited to: 3,3′diaminodiphenylsulphone, 4,4′diaminodiphenylsulphone; 4,4′-methylene-bis-(3-chloro-2,6-diethylaniline) (MCDEA), 4,4′-methylene-bis-(2,6-diethylaniline) (MDEA), 2,6-diethylaniline (DEA), and dianiline; and (c) optionally, an imidazole as curing accelerator, wherein, per 100 parts of multifunctional epoxy resin (a), the amount of hardener composition (b) is 10-90 parts, and if present, the amount of imidazole (c) is up to 10 parts, and wherein said epoxy resin composition is curable at a temperature below the cure onset temperature of the aromatic amine curing agent for a time period of less than 5 minutes to achieve a degree of cure of 95% or higher. |
