Hot-melt polycondensation method for manufacturing a polycarbonate composition
AssigneeGeneral Electric Company
InventorsTakeshi Sakashita, Tomoaki Shimoda, Takashi Nagai, Kenichi Tominari, Akio Kanezawa
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Abstract
The method of the present invention is a hot-melt polycondensation for an aromatic dihydroxy compound and a dicarbonate in the presence of a basic catalyst, adding sulfur-containing acid compound with a pKa value less than 3 or the derivative thereof, and 5-1,000 ppm of water, and additives as needed for the polycarbonate while the reaction product polycarbonate is still in a molten state, and kneading the material.
Claims9
A method for manufacturing a polycarbonate composition comprising performing a hot-melt polycondensation of an aromatic dihydroxy compound and a dicarbonate in the presence of a basic catalyst, adding
- (B) 0.1-10 ppm of a sulfur-containing acid compound with a pKa value less than 3 or a derivative thereof, and
- (C) 5-1,000 ppm of water for the polycarbonate while the reaction product polycarbonate (A) is still in a molten state, and kneading the material.
A method for manufacturing a polycarbonate composition comprising performing a hot-melt polycondensation of an aromatic dihydroxy compound and a dicarbonate in the presence of a basic catalyst, adding
- (B) 0.1-10 ppm of a sulfur-containing component acid with a pKa value less than 3 or a derivative thereof,
- (C) 5-1000 ppm of water for the polycarbonate, and
- (D) additives
- while the reaction product polycarbonate (A) is still in a molten state, and kneading the material.
Dependencies are inferred from the claim text.