http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1904555-A2
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 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-16 |
classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G69-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-18 |
filingDate | 2006-06-13-04:00^^<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 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_db2724c4bf6c63fc18745c5d1299c78f |
publicationDate | 2008-04-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
publicationNumber | EP-1904555-A2 |
titleOfInvention | A process for a two stage melt polymerization for the production of polybenzimidazole |
abstract | The invention is a two-step process for the production of high molecular weight polybenzimidazole. Step one comprising: combining at least one aromatic hydrocarbon tetraamine and a dicarboxylic component; heating the reactants under agitation; terminating agitation while continuing heating to a step one temperature of about 230 °C and allowing the reaction mass to foam; cooling the reaction mass to a friable foamed mass; crushing said mass to obtain a first pulverized prepolymer. Step two comprising: transferring said first prepolymer into a second reaction vessel; pressure washing of the first reaction vessel to obtain a second pulverized prepolymer; transferring the second ground prepolymer to the second reaction vessel; heating the first and second pulverized prepolymers under agitation to a temperature that is higher than step one temperature until the desired degree of polymerization is achieved. |
priorityDate | 2005-07-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 87.