| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_52a65b677bbedbe7bf090dd556a7cc43 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-1042
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-1071 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-10 |
| filingDate |
1989-01-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_04ce2bf1d25815e7917df93dd2c7ab27
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_be3bd166e065bad352641cc1efd3796a |
| publicationDate |
1989-07-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0323912-A1 |
| titleOfInvention |
Low-melting polyimide copolymers and the preparation thereof |
| abstract |
A low-melting copolyimide contains 30 to 90 mole% of imide repeating units of the formula:n (b) 10 to 70 mole% of imide repeating units of the formula:n the copolymer having a logarithmic viscosity number of 0.1 to 5 dl/g when measured in concentrated sulphuric acid at a temperature of 30 ± 0.01°C at a concentration of 0.5 g/dl. n The copolymers are prepared by the polycondensation of appropriate tetracarboxylic anhydries and diamines to form a precursor which is subsequently converted to the polymer. (c), optionally, imide repeating units of the formula:n and R⁵ is a carbocyclic aromatic group having 6 to 50 carbon atoms, but when R⁴ is |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5268447-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5268446-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0400811-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5688848-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5177180-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0585829-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0585829-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0479148-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0470446-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0479148-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0424805-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0424805-A2 |
| priorityDate |
1988-01-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |