| 摘要 |
<p>The essence of the disclosed composition is the combination of materials of excellent insulating properties. The cheaper price and the easy processability of epoxy resins are combined with the advantageous surface properties (hydrophobicity, recovery after dry band arcing) and good weather resistance of silicone rubbers. The new composition can be processed by low pressure casting or by pressure gelation. Due to its low viscosity the base resin can take up a large amount of fillers. The silicone component modifying the epoxy resin is not simply a plasticizer, but it is built into the network structure and its effect is permanent. The main components of the composition are cycloaliphatic, aliphatic (or aromatic) epoxy resin, cycloaliphatic (or aromatic) anhydride (perhaps amine or polyamino-amide) cross-linker, accelerator, and a silicone oligomer containing epoxy end-group. Further components may be low molecular or macromolecular active diluent (flexibilizer) and filler. By changing the ratio of the components one can produce several compositions from a rigid, load-bearing structure up to the soft, rubber-like structures.</p> |
