Abstract
The dry prepreg and its lamination was studied using novel cycloaliphatic epoxy resins (CE-resins) derived from 2, 7-octadienol, since the CE-resins have mild reactivity with BF3·MEA hardener and give good thermal and mechanical properties. The dry perpreg under the drying conditions at 100-120°C for 5-8 minutes using toluene-methylethyl ketone mixture, showed a good shelf life but too poor flowability to laminate.
Trial for improving the flowability by adding the conventional two-functional cycloaliphatic epoxy resins was effective in achieving a good lamination. Thus, the first cycloaliphatic epoxy laminate, obtained from dry prepreg under the press condition of 175°C and 105 kgf/cm2, proved to have characteristics such as good thermal and mechanical properties as well as good arc and tracking resistance, as expectedly.
The only defect of poor water resistance in the cured cycloaliphatic epoxy composites was improved by the selected surface treatment on the glass cloth for strong adhesion.
