| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c7ad58d3c0b071069a8ee0cb8c8ba2e8 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C263-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-7664
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-32
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C209-78 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-76
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C209-78
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C211-50
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C263-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C265-14 |
| filingDate |
2003-03-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2003-10-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a9ac1780ef104bce4d1be75c1d1a6c12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2a94a36e3a005ded08620bf6334f24bc
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fb1edd8000097ec4a74ec953d1a679b5
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e9148f283f55da6551fe00e2fc121d4f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f61691b19afe09e44cd0ed5e0e12fbb5 |
| publicationDate |
2003-10-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-6639102-B2 |
| titleOfInvention |
Process for producing polyisocyanates of the diphenyl methane series having a reduced color value |
| abstract |
Polyisocyanates of the diphenyl methane series having reduced color values are obtained by a) reacting aniline and formaldehyde in the presence of an acid catalyst to form a polyamine, b) neutralizing the reaction mixture containing polyamine with a base, c) separating the neutralized mixture into the aqueous and the organic phases, d) adding a base to the organic phase and then e) phosgenating the resulting polyamine to produce the corresponding polyisocyanate. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006183938-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2007179317-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2005113557-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006287555-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2004002579-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7435853-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7253321-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7312362-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8614352-B2 |
| priorityDate |
2002-03-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |