Process for curing polyepoxides and resulting product
Abstract
Abstract A PROCESS FOR CURING A POLYEPOXIDE TO OBTAIN A CLEAR COLORLESS CASTING ADAPTIBLE FOR OPTICAL APPLICATIONS COMPRISING REACTING: (A) A MIXTURE OF (1) EPOXY RESIN AND (2) HEXAHYDROPHTHALIC ANHYDRIDE AND (B) A CURING CATALYST COMPOSITION COMPRISING (1) AN EQUAL WEIGHT MIXTURE OF (A) A METAL CARBOXYLATE E.G. ZN OLEATE, ZN OR SN-II 2-ETHYL HEXOATE AND NA SALICYLATE (B) TRIPHENYL PHOSPHITE (2) THE PRODUCT OF REACTION AT 40 TO 100*C. OF H3PO4 WITH AN ALIPHATIC GLYCIDYL ETHER IN THE PRESENCE OF A SOLVENT SUCH AS GLYCERINE POLYETHYLENE GLYCOL OR A GLYCERINE INITATED POLYPROPYLENE GLYCOL (3) AN AMOUNT OF HEXAHYDROPHTHALIC ANHYDRIDE SUFFICIENT TO BRING THE TOTAL IN THE SYSTEM UP TO 40 TO 100 PARTS BY WEIGHT OF POLYEPOXIDE.
Inventors
- 👤 Lawrence D Harry
- 👤 George A Sweeney
Bibliographic Details
Claims Analysis
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