| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b55c349b43c3ecba4977fd52cc8f8c67 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2379-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-54
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2201-0464 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J9-28
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H05K1-0346 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H05K1-03
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J9-28
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J9-26 |
| filingDate |
2001-11-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e9430173234e223697c182e7b1037b3a
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8b3918f99d03e500a974b0e7ee3a1987
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8759944600c45d234a39b62d4ff3a6e8
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d7801423940cabae20bd01d28b9d371c |
| publicationDate |
2002-05-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
KR-20020037286-A |
| titleOfInvention |
Process for producing porous polyimide and porous polyimide |
| abstract |
The present invention relates to a low dielectric constant heat resistant porous polyimide of a fine cell structure. The porous polyimide is added by adding a dispersible compound to the polyimide precursor to form a micro-domain structure such that the dispersible compound is dispersed in the polymer and has a size smaller than 10 μm, followed by extraction with supercritical carbon dioxide. Prepared by a process comprising removing the acidic compound to make the precursor porous, wherein the interaction parameter χ AB between the polyimide precursor (A) and the dispersible compound (B) is greater than three. Such porous polyimide has an average bubble diameter of less than 5 mu m and a dielectric constant of 3 or less. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9725565-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10112368-B2 |
| priorityDate |
2000-11-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |