http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1769016-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0d23ccf987f680486db35766d52794e3 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-18 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G69-00 |
| filingDate | 2005-06-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_802a80bb2507fdbfcecec3b9137df372 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3497f26636b7ee256b4d11cd9e6cbcf6 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_dfecc338967ae3d69630c63ca2839602 |
| publicationDate | 2007-04-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-1769016-A1 |
| titleOfInvention | A process for a two stage melt polymerization for the production of polybenzimidazole having an improved solid state polymerization |
| abstract | A process for the production of high molecular weight polybenzimidazole by one: providing a first reaction vessel; charging the reaction vessel with at least one aromatic hydrocarbon tetraamine, and a heterocylic ring making up the dicarboxylic component; heating the reactants under agitation in a substantially oxygen-free atmosphere with agitation until the agitator torque is about 1.5 times the torque before a rise in viscosity begins; terminating the agitation while continuing to heat the reaction mixture to about 230° C while allowing the reaction mass to foam; cooling the reaction mass to a friable foamed mass; crushing the friable foamed mass to obtain a ground prepolymer; and two: providing a second reaction vessel, the second reaction vessel being a high intensity reaction vessel; transferring the ground prepolymer to the second reaction vessel; heating the ground prepolymer under agitation to over 315° C at atmospheric pressure for a time of about 90 minutes. |
| priorityDate | 2004-07-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 101.