EPOXY RESIN SYSTEM CONTAINING POLYETHYLENE TETRAAMINES FOR RESIN TRANSFER MOLDING PROCESSES

摘要

A two-component curable epoxy resin system is disclosed. The resin system includes an epoxy resin component containing at least 80% by weight of a polyglycidyl ether of a polyphenol. The system also includes a hardener mixture containing mainly polyethylene tetraamines. The system includes one or more of i) alkali metal salts, ii) carboxylic acid-, carboxylic anhydride- or carboxylic acid ester-substituted phenol compounds, iii) an amino as a catalyst. The system has beneficial curing characteristics that make it useful for producing fiber-reinforced composites in a resin transfer molding process.

主权项

1. A curable epoxy resin system, comprising
1) an epoxy resin component containing one or more epoxy resins, wherein at least 80% by weight of the epoxy resins is one or more polyglycidyl ethers of a polyphenol that has an epoxy equivalent weight of up to about 250; 2) an amine hardener, wherein the amine hardener is a polyethylene tetraamine mixture containing at least 95% by weight polyethylene tetraamines, the mixture containing at least 40% by weight linear triethylene tetraamine, wherein at least 0.8 epoxy equivalents are provided to the reaction mixture by the epoxy resin component per amine hydrogen equivalent provided by the amine hardener; and 3) a catalytically effective amount of at least one catalyst selected from the group consisting of i) alkali metal salts, ii) carboxylic acid-, carboxylic anhydride or carboxylic acid ester-substituted phenol compounds, iii) an amino acid, the catalyst being present in the epoxy resin component, the amine hardener, or both.