Synthesis of 1,1-dichloro-2,2-bis[4-(4'-hydroxyphenyl)phenyl]ethene and its incorporation into homo- and heteropolycarbonates

Polycarbonates from 1,1-dichloro-2,2-bis-(4-hydroxyphenyl)ethylene (BPC) constitute a highly flame-resistant family of engineering thermoplastics. The preparation of polycarbonates from BPC was first reported in 1964 as a copolymer with bisphenol A (BPA). A new monomer analogue of BPC has been synthesized which has a higher aspect ratio than BPC. This monomer has been polymerized to polycarbonates with the goal of improved ductility and heat-resistance. An efficient synthesis of the monomer 1,1-dichloro-2,2-bis[4'-(4-hydroxyphenyl)phenyl] ethane (TABPC) is reported, as are the molecular weights and glass transition temperatures of homo-and heteropolycarbonates of TABPC.