| 摘要 |
<p>Fibrous-reinforced composites, such as prepregs and sheet moulding compounds, are made with a thermosettable Friedel-Crafts resin, a heat-curing agent therefor, and a photopolymerisable compound. The Friedel-Crafts resins employed are those obtainable by a Friedel-Crafts reaction of certain aralkyl alkyl ethers and/or certain aralkyl halides with phenolic compounds. The heat-curing agents employed are those used to cure novolac resins, and include formaldehyde in various forms, sources of formaldehyde, and also epoxide resins. Fibers may be impregnated with a liquid mixture of the resin, heat-curing agent, and the photopolymerisable compound, and exposed to actinic radiation to cause the mixture to solidify through photopolymerisation. Alternatively, the liquid mixture is exposed to actinic radiation to form a solid film into which the fibers are pressed. The product, when desired, e.g., after stacking to form a multilayer laminate, or after shaping, is heated to cure the resin.</p> |
