Use of heterocyclic acids in phenolic resins
Abstract
Abstract COVERS A COMPOSITION COMPRISING, AS A MAJOR COMPONENT, SOLID DISCRETE INERT FILLER PARTICLES, AND AS A MINOR COMPONENT, A THERMOSETTING PHENOLIC RESIN COMPOSITION. THE PHENOLIC RESIN COMPOSITION COMPRISES THE REACTION PRODUCT OF AN ALDEHYDE WITH A PHENOLIC COMPOUND IN THE RATIO OF BETWEEN ABOUT 0.5 AND ABOUT 0.85 MOLE OF ALDEHYDE PER MOLE OF PHENOLIC COMPOUND, A CROSS-LINKING AGENT, AND A HETEROCYCLIC ACID WHICH IMPARTS A HIGH DEGREE OF FLUIDITY TO THE RESIN IN ITS FUSED STATE IN AN AMOUNT FALLING WITHIN THE RANGE FROM ABOUT 0.5% TO ABOUT 12% BY WEIGHT BASED ON TOTAL WEIGHTS OF THE ALDEHYDE AND THE PHENOLIC COMPOUNDS. A PROCESS FOR PREPARING THE COMPOSITION DESCRIBED ABOVE IS DISCLOSED. MOLDED PRODUCTS MADE FROM THE COMPOSITION ARE ALSO SET OUT. IN PARTICULAR, THE COMPOSITION CAN BE MADE INTO SHELL MOLDS AND CORES. THE MOLDS AND CORES EXHIBIT SIGNIFICANTLY REDUCED PEEL BACK.
Inventors
- 👤 Paul H Van Wyk
Bibliographic Details
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