Epoxide resins reacted with polyhydric phenols

Claim 1

THE THREE-STEP PROCESS OF PRODUCING LONG CHAIN POLYMERS AND INSOLUBLE, INFUSIBLE PRODUCTS, WHICH COMPRISES FIRST REACTING A DIHYDRIC PHENOL FREE FROM REACTIVE GROUPS OTHER THAN PHENOLIC HYDROXYL GROUPS WITH MORE THAN 1 MOL AND NOT MORE THAN ABOUT 2 MOLS OF A CHLORHYDRIN SELECTED FROM THE CLASS WHICH CONSISTS OF EPICHLORHYDRIN AND GLYCEROL DICHLORHYDRIN IN THE PRESENCE OF CAUSTIC ALKALI TO FORM A LOW MELTING POINT EPOXIDE RESIN, ADMIXING WITH THE EPOXIDE RESIN A DIHYDRIC PHENOL FREE FROM REACTIVE GROUPS OTHER THAN PHENOLIC HYDROXYL GROUPS, WITH THE PROPORTION OF DIHYDRIC PHENOL TO EPOXIDE RESIN LESS THAN THAT CORRESPONDING TO THE EPOXIDE EQUIVALENT OF THE RESIN, HEATING TO EFFECT REACTION OF THE DIHYDRIC PHENOL WITH SAID EPOXIDE RESIN TO FORM A HIGHER MOLECULAR WEIGHT AND HIGHER MELTING POINT EPOXIDE RESIN, AND FURTHER REACTING THE RESULTING RESIN WITH A DIHYDRIC PHENOL IN A SUFFICIENT PROPORTION TO PRODUCE AN INSOLUBLE, INFUSIBLE PRODUCT.