Process for producing raw polycarbonate resin material and producing polycarbonate resin
AssigneeIdemitsu Petrochemical Co., Ltd.
InventorsHajime Ito, Akio Suwa, Jun Kohiruimaki
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Abstract
The invention relates to an inexpensive and simple method for producing a starting material for polycarbonate resin and for producing polycarbonate resin. In the method for producing a starting material for polycarbonate resin production through interfacial polymerization, (I) a molten bisphenol compound is mixed and dissolved in an aqueous alkali solution at 20 to 80° C., or (II) it is, without being solidified, directly mixed with water to be in liquid at a temperature not higher than the melting point of the bisphenol compound, and then dissolved in an aqueous alkali solution.
Claims17
A method for producing a starting material for polycarbonate resin production, comprising:
- preparing a melt of a bisphenol compound in a process of bisphenol compound production;
- and
- mixing and dissolving the molten bisphenol compound in an aqueous alkali solution at 20 to 80° C., thereby preparing a bisphenol starting material for the production of a polycarbonate resin by interfacial polymerization.
A method for producing a polycarbonate resin, comprising:
- preparing a melt of a bisphenol compound in a process of bisphenol compound production;
- mixing and dissolving the molten bisphenol compound in an aqueous alkali solution at 20 to 80° C.;
- and the
- conducting interfacial polymerization employing the prepared bisphenol containing aqueous solution as a reactant, thereby preparing a polycarbonate resin product.
A method for producing a starting material for polycarbonate resin production, comprising:
- preparing a melt of a bisphenol compound in a process of bisphenol compound production;
- and
- without solidification of the melt, mixing the molten bisphenol compound into liquid water at a temperature higher than the melting point of the bisphenol compound;
- and then
- dissolving the water solution obtained in an aqueous alkali solution.
A method for producing a polycarbonate resin, comprising:
- preparing a melt of a bisphenol compound in a process of bisphenol compound production;
- without solidification of the melt, mixing the molten bisphenol compound into liquid water at a temperature higher than the melting point of the bisphenol compound;
- dissolving the water solution obtained in an aqueous alkali solution;
- and then
- conducting interfacial polymerization employing the prepared bisphenol containing aqueous alkali solution as a reactant, thereby preparing a polycarbonate resin product.
Dependencies are inferred from the claim text.