| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_503ca624090dbdff07cca03c51569340
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_78648c6564ea67f1da5d1aa28e5c93a1
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6c8d4dc7bd1a30d8fda907fceaeb4e69
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d4417491c34aa50ca57c66f0613aec03 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C63-331
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D407-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-89
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-1007
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-10 |
| filingDate |
2005-06-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b1429ab021a78575bedb060f7cadb835
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5f236e70e3406f989e2c26a9fa831dc5
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4888ede648a3e8f8172cda5e86bad10c |
| publicationDate |
2006-01-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
WO-2006001443-A1 |
| titleOfInvention |
Biphenyltetracarboxylic acid dianhydride and process for producing the same, and polyimide formed from the same and process for producing the same |
| abstract |
A process for producing BPDA by which high productivity is attained while maintaining a high purity. The process for biphenyltetracarboxylic acid dianhydride production comprises heating biphenyltetracarboxylic acid to produce biphenyltetracarboxylic acid dianhydride, wherein the heat treatment is conducted at a pressure of 1×102-1.1×105 Pa to a maximum temperature in the range of 210-250°C in such a manner that at least 1/4 the period used for heating from 60°C to 210°C has a heating rate of 50 °C/Hr or higher and that the acid is held at 150-250°C for 0.5-10 hours. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2006137882-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2012011590-A1 |
| priorityDate |
2004-06-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |