IPDB >Record detail Report generated at IPDB: http://nclinnovations.org/ipdb/details.php
Level 1:Core information
Record no 201102173308
Activity status Dead or Administration by others
Working Title PROCESS FOR THE PREPARATION OF AROMATIC POLYESTERS 
Working Inventors BHASKAR B. IDAGE;NAYAKU N. CHAVAN;SUDHAKAR S. MAHAJAN;SWAMINATHAN SIVARAM; 
Contributing institutions NCL 
Administered by  
Ownership  
Categories > Subjects Polymer sciences and engineering 
Categories > Portfolio Polymerization/Polymer catalysis 
Disclosure number
NCL No 1991-NCL-0046 
CSIR No 1991-NF-0218  
Priority date 04-01-1993 
Country US 
Application number 08/041700  
Provisional filing date  
Complete filing date 04-01-1993  
Publication status Yes  
Publication date  
Publication no  
Granted number 5340908  
Granted date 08-23-1994  
Final title PROCESS FOR THE PREPARATION OF AROMATIC POLYESTERS  
Final Inventors BHASKAR B. IDAGE;NAYAKU N. CHAVAN;SUDHAKAR S. MAHAJAN;SWAMINATHAN SIVARAM;  
Abstract This invention relates to a process for the preparation of aromatic polyester s having an intrinsic viscosity greater than 0.4 dL g in chloroform at 30° C. which comprises a reacting diarylesters of tere and isophthalic acid s and dihydric phenol s in the melt phase in an inert atmosphere in the presence of a catalyst selected from alkoxides of Group IV B metals and derivatives of Group IV A metals and in the presence of an organic solvent at a temperature in the range of 100° 300° C. to form a prepolymer having intrinsic viscosity in the range of 0.1 to 0.3 dL g in chloroform at 30° C. b purifying the prepolymer using conventional solvent extraction methods and c Polycondensing the purified prepolymer at a temperature in the range of 300° 350° C. in presence of a catalyst selected from alkoxides of Group IVB metals and derivatives of Group IVA metals under reduced pressure.
Case status Granted + Allowed to lapse  
Licensing status  
Licensing case no  
Client name  
Lead inventors  
Categories > Industry > Primary  
Categories > Industry > other  

Note: IPDB gets updated on last day of every month.