Premoulding material having long-term controllable b-stage...

Details Premoulding material having long-term controllable b-stage... Premoulding material having long-term controllable b-stage...

C - Chemistry, Metallurgy

08

L

400/5419, 400/73

C08L 61/06 (2006.01) C04B 24/30 (2006.01) C08G 8/10 (2006.01)

Patent

CA 2004669

Abstract Premoulding materials having long-term controllable B-stage characteristic, comprising phenol resins, optionally with reagents, additives and adjuvants, are characterised in that they contain hydraulic binder and/or its components as well as an agent that reduces the alkalinity and optionally the content of free metal ions. For its preparation, 1 part by wt. phenol resin is mixed with less than 4 parts by wt. of a hydraulic binder and/or its components as well as less than 0.2 equivalent parts by weight of the agent. The phenol resin premoulding materials according to the invention thicken quickly to a desired B-stage, are capable of maintaining the attained plateau, and thus allow the manufacture of heat- curable composites of desired rheology and reactivity.

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