Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
502 1, 502 2, 502 7, 528 4, 528147, 528196, 528198, 528199, 528200, 528404, 528405, C08G 804
A processes for producing a (co)polycarbonate having a low terminal hydroxyl group concentration and being excellent in heat resistance and hue, which comprises melt-polycondensing a dihydroxy compound with a carbonic diester in the presence of a catalyst for transesterification selected from the group consisting of a nitrogen-containing basic compound, an alkali metal borate and an alkaline earth metal borate and in the presence of a specific ester compound.
patent: 4871795 (1989-10-01), Pawar
patent: 5276109 (1994-01-01), Sakashita et al.
DATABASE WPI, AN 93-61696 & JP-A-05 009 283, 28 Jun. 1991, Abstract.
Daicel Chemical Industries Ltd.
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