Fabrication of mouled bodies from a one-coponent epoxy resin composition by means of an automatic pressure gelling process

摘要

Production of a moulding by automatic gelation of a liquid, thermosetting epoxide resin composition under pressure is carried out in a mould at a temperature high enough to initiate thermal cure and the composition is allowed to cure in the mould until it is solid enough to be removed. During cure, the moulding is kept under a pressure high enough to compensate for shrinkage. The novel features are that (1) a one-component composition is used; (2) the composition contains epoxide resin(s) with 1 epoxide group/molecule, together with N-benzylquinolinium hexafluoroantimonate (I) and 1,1,2,2-tetraphenyl-1,2-ethane diol (benzopinacol) (II), each in an amount NOTGREATER 0.02 mole/equivalent of epoxide groups; (3) the composition is introduced into the mould at a temperature of 30-55 degrees C; and (4) the temperature of the mould is 140-150 degrees C.