| 摘要 |
Preform compounds with long-term adjustable B-stage characteristics made of phenolic resins together, where appropriate, with reactive substances, additives and auxiliaries are remarkable in that they contain hydraulic binders and/or their components together with an alkalinity and possibly a freemetal ion reducer. For their manufacture, 1 part by weight of phenolic resin is mixed with 4 parts by weight of a hydraulic binder an/or its components and less than 0.2 equivalent parts by weight of a reducing agent. The phenolic resin preforms compounds of the invention rapidly cure to a desired B-state, are capable of remaining at the level reached and thus make it possible to produce thermosetting preliminary binders of suitable rheology and reactivity. |
