http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6133406-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7ef01e33058cf740cf2197991be97af1 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G69-265 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G69-28 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G69-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G69-26 |
| filingDate | 1998-11-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2000-10-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_13c235c5cb60afd01028ceedfbe0a18a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2eec29c8158f65f63cf082f32b839da7 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8dcd8063d7c95e3488283d5c84f000b1 |
| publicationDate | 2000-10-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-6133406-A |
| titleOfInvention | Process for preparing aromatic polyamides |
| abstract | The present invention relates to a process for preparing an aromatic polyamide which comprises: (A) a dicarboxylic acid component unit comprising 30 to 100 mol % of a terephthalic acid component unit, and, as required, 0 to 70 mol % of a cyclic dicarboxylic acid component unit other than the terephthalic acid and, as required, 0 to 15 mol % of an aliphatic dicarboxylic acid having 7 to 20 carbon atoms; and (B) a diamine unit comprising 50 to 100 mol % of a component unit derived from an aliphatic alkylene diamine having 4 to 25 carbon atoms, and 0 to 50 mol % of a component unit derived from an alicyclic diamine having 3 to 25 carbon atoms; said process comprising: a step (i) of preparing a solid low-degree condensation product having an intrinsic viscosity [ eta ]1 of from 0.05 to 0.2 dl/g is prepared by the polycondensation reaction of the dicarboxylic acid with the diamine; a step (ii) of solid-phase polymerizing said low-degree condensation product at a temperature of not higher than 195 DEG C. to prepare a solid-phase polymerized product having having an intrinsic viscosity [ eta ]2 satisfying the following relationship [I],[ eta ]2-[ eta ]1=0.02 to 0.1 dl/g [I] and; a step (iii) of further solid-phase polymerizing said solid-phase polymerized product to obtain an aromatic polyamide having an intrinsic viscosity [ eta ]3 of from 0.15 to 1.1 dl/g and a ratio [ eta ]3/[ eta ]2 of not smaller than 1.0. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/TW-I460207-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112409594-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112409594-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2010003277-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2015526578-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-115197416-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2011028614-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9611356-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9023975-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8487024-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9090739-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9115247-B2 |
| priorityDate | 1997-11-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 409.