Self-extinguishing epoxy resin containing a halogenated polynuclear phenol and a hardening agent

Claim 1

AN EPOXY RESIN COMPOSITION CURABLE TO A SELF-EXTINGUISHING PRODUCT HAVING A HIGH HEAT DISTORTION TEMPERATURE, HARDNESS, AND CHEMICAL RESITANCE, CONSISTING ESSENTIALLY OF THE REACTION PRODUCT OF A GLYCIDYL ETHER OF A POLYNUCLEAR PHENOLIC COMPOUND HAVING AN OXIRANE FUNCTIONALITY PER MOLECULE OF MORE THAN 2, A HALOGENATED POLYNUCLEAR PHENOLIC COMPOUND HAVING AN AVERAGE HYDROXYL FUNCTIONALITY PER MOLECULE OF AT LEAST 2, IN AN AMOUNT SUFFICIENT TO PROVIDE AN EQUIVALENT WEIGHT RATIO OF HYDROXYL TO OXIRANE GROUPS OF BETWEEN ABOUT 0.1 AND ABIUT 0.45 AND, A SUPPLEMENTAL HARDENING AGENT IN AN AMOUNT SUFFICIENT TO EFFECT CROSS-LINKING OF SUBSTANTIALLY ALL THE REMAINING OXIRANE GROUPS SAID HALOGENATED POLYNUCLEAR POLYPHENOLIC COMPOUND PROVIDING SUFFICIENT HALOGEN TO RENDER THE SUBSEQUENTLY CURED RESIN COMPOSITION SELF-EXTINGUISHING.