[12] Patent
[11] Patent No.:GC0007659  
[45] Date of Publishing the Grant of the Patent: 30/Apr /2018                48/2018  
Number of the Decision to Grant the Patent:2018/126561
Date of the Decision to Grant the Patent:29/Apr/2018

[21] Application No.:GC 2014-27377

[22] Filing Date:22/6/2014

[30] Priority:

[33] State [32] Priority date [31] Priority No.
EP
20/6/2013
13382234.6

[72] Inventors:1- Ignacio Vic FernandezŲŒ2- Isabel Macian Aviles

[73] Owner: SABIC Global Technologies B.V., Plasticslaan 1, 4612 , Bergen op Zoom, Netherlands

[74] Agent: Saba & Co. T.M.P

  

 

  

[51]IPC:
Int. Cl.: C08G 64/06, 64/30; G01N 29/024, 29/44 (2006.01)

[56] Cited Documents:

-DE 103 47 826 A1 (ZIMMER AG [DE]) 12 May 2005
-US 2003/199665 A1 (KIMURA TAKATO [JP] ET AL) 23 October 2003
-US 2007/197764 A1 (YOKOTA KOSHI RO [JP] ET AL) 23 August 2007
 
Examiner: Faisal Abdulla Aljardan

[54] PROCESS FOR THE MANUFACTURE OF POLYCARBONATE COMPOSITIONS
[57] Abstract: A continuous process for the manufacture of a polycarbonate comprises: combining an aromatic dihydroxy compound stream and a diaryl carbonate stream to form a mixture; controlling a weight or molar ratio of the diaryl carbonate to the aromatic dihydroxy compound by: measuring a sound velocity, Vs, in the mixture at an operating temperature of the controlling step; and determining the weight or molar ratio of the diaryl carbonate to the aromatic dihydroxy compound in the mixture; and adjusting a flow rate of at least one of the aromatic dihydroxy compound stream and the diaryl carbonate stream, if needed, to achieve a desired weight or molar ratio of the diaryl carbonate to the aromatic dihydroxy compound; and polymerizing the aromatic dihydroxy compound and the diaryl carbonate in the presence of a catalyst to produce the polycarbonate.
No. of claims: 13     No. of figures: 7


 

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