| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_f36afbd052157a01a3b8c80e2917fae2 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-18 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G69-00 |
| filingDate |
2004-07-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_20d6ea140a72856951a9666a2e76e2e1
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_874c97739981f79d92b712db53546aea
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_64a76125f065018f49047aab611a9a7b |
| publicationDate |
2006-01-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-2006004182-A1 |
| titleOfInvention |
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. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7038007-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7060782-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006004181-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009075141-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2007010646-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2008103604-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2006014213-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2006014213-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2007008327-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2008103604-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7504475-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8101315-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006009613-A1 |
| priorityDate |
2004-07-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |