http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8921511-B2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1e70c0aeade92d7571d955d3b90ea06e http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9265431181f1b66786319fa2cd87b3ec |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G69-265 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G69-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G69-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G69-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G69-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G69-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G69-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G69-00 |
| filingDate | 2012-07-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2014-12-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_93c54c661c9473188d46aea63bdd391f |
| publicationDate | 2014-12-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-8921511-B2 |
| titleOfInvention | Process for forming an aramid copolymer |
| abstract | The invention concerns processes for forming polymer crumb comprising residues of 2-(4-amino phenyl)-5 (6) amino benzimidazole (DAPBI), paraphenylene diamine (PPD), and terephthaloyl dichloride (TCl), comprising the steps of: i) forming a slurry of b mole percent DAPBI in a solvent system comprising organic solvent and c weight percent of an inorganic salt, wherein the inorganic salt is present in an amount of at least 5 weight present of the organic solvent; ii) contacting the slurry with a less than stoichiometric amount of terephthaloyl chloride to form an prepolymer solution; and iii) contacting the prepolymer solution with y mole percent of PPD and additional TCL to form a polymer solution; wherein the total amount of TCL added in steps ii) and iii) is a stoichiometric amount based on the total amount of DAPBI and PPD added in steps i) and iii); the DAPBI and PPD are added in an amount sufficient for providing a polymer solution having a weight percent solids of 12 percent or greater on a polymer basis; and wherein the sum of y+b is 100 and the product of b×c is 225 or greater. |
| priorityDate | 2012-07-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 78.