http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104684965-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G69-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G69-32 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G69-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G69-32 |
| filingDate | 2012-07-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2017-05-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2017-05-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-104684965-B |
| titleOfInvention | Process for forming aramid copolymers |
| abstract | The present invention relates to a method of forming polymer crumbs comprising 2-(4-aminophenyl)-5(6)-aminophenylbenzimidazole (DAPBI), p-phenylenediamine (PPD) and the residue of terephthaloyl dichloride (TCl), the method comprising the steps of: i) forming a slurry of b mole % DAPBI in a solvent system comprising an organic solvent and c weight % of an inorganic salt , wherein the inorganic salt is present in an amount of at least 5% by weight of the organic solvent; ii) contacting the slurry with a substoichiometric amount of terephthaloyl chloride to form a prepolymer solution; and iii) making The prepolymer solution is contacted with y mole % of PPD and additional TCL to form a polymer solution; wherein the total amount of TCL added in steps ii) and iii) is equal to the amount of DAPBI added in steps i) and iii) and A stoichiometric amount based on the total amount of PPD; the DAPBI and PPD are added in an amount sufficient to provide a polymer-based polymer solution having a weight percent solids of 12% or greater; 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: 38.