| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c72d118f5664072de841f9c5c34b9d99 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-307
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-30 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-30 |
| filingDate |
2004-08-24^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c8ab1c958dba3722c010a9d211ba4cee
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7af87b864f139c92db966cba3f462d58 |
| publicationDate |
2005-08-04^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-2005171323-A1 |
| titleOfInvention |
Process for the production of copolycarbonates with reduced color |
| abstract |
A method is provided for reducing the color generated during production of copolycarbonate that includes quinone-type residues. The method includes the steps of mixing the precursors of monomer residues, a carbonate source and a polymerization catalyst into a reaction mixture. The method further includes the steps of introducing an antioxidant such as a hydroxycarboxylic acid to the reaction mixture in an amount sufficient to reduce color formation and introducing the reaction mixture to a series of process units wherein the reaction mixture polymerizes. The resulting copolycarbonate has improved color as compared to a copolycarbonate formed in a process without the step of introducing an antioxidant to the melt polymerization process. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2011152420-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2011152471-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2011152431-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2007208159-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7495064-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8017697-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2010139944-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2007299241-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2007287796-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2007208144-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-102007052968-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009318635-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8450412-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009117314-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006056776-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2008002721-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8309655-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-2058363-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7847032-B2 |
| priorityDate |
2004-01-29^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |