ADDUCTS OF DIAMINODIPHENYL SULFONE COMPOUNDS AS HARDENERS FOR EPOXY RESINS

摘要

The present invention relates to a hardener for polyfunctional epoxy resinscomprising theadduct obtained from the reaction of (1) a diaminodiphenyl sulfone of theformula(See Formula I)wherein R1, R2, R3 and R4 are independently hydrogen, C1-C4alkyl or halogenand (2) acycloaliphatic diepoxide at a ratio of aminohydrogen equivalent of saidsulfone to saidepoxy equivalent of said diepoxide from 2.5:1 to 75:1.