Interfacial polycarbonate polymerization process and product
AssigneeGeneral Electric Company
InventorJackie D. Davies
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Abstract
A process for preparing an aromatic carbonate polymer by an interfacial polymerization reaction by first forming an aliphatic chloroformate and then reacting the bischloroformate with a dihydroxy phenol such as bisphenol-A. The resulting polymer consists of alternating units of the reaction residue of the dihydroxy phenol and the aliphatic chloroformate.
Claims16
A carbonate copolymer consisting essentially of the residue of the polymerization reaction of one or more aromatic dihydroxy compound and an aliphatic haloformate, said carbonate copolymer having the formula:
- ##STR5## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are independently selected from the group consisting of alkyl, aryl, and alkylaryl hydrocarbons of 1 to 20 carbon atoms, R is selected from the group consisting of alkyl, aryl, and alkylaryl hydrocarbons of 1 to 20 carbon atoms, disubstituted oxygen, sulfone, and spirobiindane, n is an integer of 5-200, and wherein the ratio of aromatic species to aliphatic species is 1:0.5 to 1:1.5.
A process for preparing a carbonate copolymer by an interfacial polymerization reaction comprising:
- reacting an aliphatic diol with a halogen containing carbonate precursor to form an aliphatic haloformate;
- reacting the aliphatic haloformate with an aromatic dihydroxy compound in an interfacial polymerization reaction in the presence of an amine at a pH of 8-14 to form a carbonate copolymer consisting essentially of the residue of the aliphatic haloformate and the aromatic dihydroxy compound wherein the ratio of aromatic species to aliphatic species in the copolymer is 1:0.5 to 1:1.5.
Dependencies are inferred from the claim text.