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公开(公告)号：EP1294793B9
公开(公告)日：2011-01-26
申请号：EP01930787.5
申请日：2001-04-27
发明人： MCCLOSKEY, Patrick, Joseph , BURNELL, Timothy, Brydon , SMIGELSKI, Paul, Michael, Jr. , HEUTS, Johan, Pieter, Anna , ZIRKZEE, Hendricus, Franciscus
IPC分类号： C08G64/30
CPC分类号： C08G64/307
摘要： A method of preparing polycarbonate by the melt process comprising the steps of: a) melting a dihydric phenol and a diester of carbonic acid for a time and at a temperature sufficient to form a melt: and thereafter introducing a catalyst composition comprising a tetraorganophosphonium salt or a derivative thereof and 1) an alkali and/or alkali earth metal compound or derivative thereof or 2) a less active alkali and/or alkali earth metal derivative thereof into the melt; and b) oligomerizing the product from step a) to a number average molecular weight of from about 3000 to about 7500; and c) polymerizing the product from step b) to a number average molecular weight of from about 16,000 to about 35,000.
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公开(公告)号：EP1414780B1
公开(公告)日：2009-08-26
申请号：EP02752120.2
申请日：2002-06-28
发明人： MCCLOSKEY, Patrick, Joseph , BURNELL, Timothy, Brydon , BRUNELLE, Daniel, Joseph , SHANKLIN, Elliott, West , SMIGELSKI, Jr., Paul, Michael , KAILASAM, Ganesh
摘要： High yields of ester-substituted diary carbonates such as bis-methyl salicyl carbonate were obtained by the condensation of methyl salicylate with phosgene in the presence of a phase transfer catalyst (PTC) in an interfacial reaction system in which the pH of the aqueous phase was greater than 9.3. Using the method of the present invention conversions of greater than 99% were obtained whereas under standard conditions using triethylamine as the catalyst conversions were limited to 70-75% of the methyl salicylate starting material even with a 20 mole% excess of added phosgene. The optimized conditions of the present invention use only a slight excess of phosgene and represent an attractive route for the manufacture of bis methyl salicyl carbonate and ester-substituted diaryl carbonates generally.
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公开(公告)号：EP1414779B1
公开(公告)日：2015-05-27
申请号：EP02742382.1
申请日：2002-07-01
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公开(公告)号：EP1294793B1
公开(公告)日：2010-09-08
申请号：EP01930787.5
申请日：2001-04-27
发明人： MCCLOSKEY, Patrick, Joseph , BURNELL, Timothy, Brydon , SMIGELSKI, Paul, Michael, Jr. , HEUTS, Johan, Pieter, Anna , ZIRKZEE, Hendricus, Franciscus
IPC分类号： C08G64/30
CPC分类号： C08G64/307
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