| 摘要 |
The use of a 4,4' methylene bis aniline compound as a curing agent for epoxy resins, wherein the 4,4' methylene bis aniline compound is a liquid at 20 °C. The 4,4' methylene bis aniline compound may have one substituent on each aniline ring, preferably the substituent is at the ortho position relative to the amine group. The 4,4' methylene bis aniline compound may also have two substituents on each aniline ring, preferably at the meta position relative to the amine group. Preferably the 4,4' methylene bis aniline compound is M-MIPACDEA, M-DIPACDEA or M-MEACDEA. The epoxy resin may have a functionality of at least two and preferably has an epoxy equivalent weight (EEW) from 80-500. The epoxy resin may also comprise a thermoplastic component that is soluble in the epoxy resin and acts as a toughening agent. The epoxy resin may be used as the matrix of a prepreg comprising a reinforcement. The reinforcement may be carbon fibre, glass fibre or aramid and may be continuous, woven, unwoven or short fibre. Also disclosed is a process for producing a composite comprising an epoxy resin, reinforcing material and a 4,4' methylene bis aniline compound. |
