Claims
- 1. A method for preparing a polycarbonate polymer, comprising the following steps:(a) reacting phenol with 2-(4-hydroxyphenyl)-2-propanol in the presence of a catalyst, at a reaction temperature of no greater than about 65° C., to prepare bisphenol A, with a selectivity for the p,p′-isomer of greater than about 97%; and then (b) reacting the p,p′-isomer of bisphenol A with a carbonate precursor, in the presence of a base.
- 2. The method of claim 1, wherein the carbonate precursor is phosgene.
- 3. The method of claim 2, wherein step (b) is carried out by an interfacial technique.
- 4. A method for preparing a polycarbonate polymer, comprising the following steps:(a) reacting phenol with 2-(4-hydroxyphenyl)-2-propanol in the presence of a catalyst, at a reaction temperature of no greater than about 65° C., to prepare bisphenol A, with a selectivity for the p,p′-isomer of greater than about 97%; and then (b) reacting the p,p′-isomer of bisphenol A prepared in step (a) with diphenyl carbonate in an ester interchange process, to form the polycarbonate.
- 5. A bisphenol A polycarbonate made by the method of claim 1.
- 6. An article made from the polycarbonate of claim 5.
- 7. A bisphenol A polycarbonate made by the method of claim 4.
- 8. An article made from the polycarbonate of claim 7.
Parent Case Info
This appln is a Div of Ser. No. 09/144,487 filed Aug. 31, 1998 now U.S. Pat. No. 5,990,362.
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