| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c7ad58d3c0b071069a8ee0cb8c8ba2e8 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-7664
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-0655
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C209-78
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C263-10 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C265-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C211-50 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C209-78
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C265-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C263-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C211-43
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G12-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-76 |
| filingDate |
2003-06-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e9148f283f55da6551fe00e2fc121d4f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9b37279be208755e99a0f525f8456e0d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2a94a36e3a005ded08620bf6334f24bc
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a9ac1780ef104bce4d1be75c1d1a6c12 |
| publicationDate |
2004-02-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
JP-2004059920-A |
| titleOfInvention |
Process for producing polyamines and polyisocyanates of the diphenylmethane series |
| abstract |
An object of the present invention is to provide a method capable of producing a diphenylmethane series polyisocyanate which is industrially simple and reliable and has a low color value. The method comprises the steps of: a) reacting aniline and formaldehyde in the presence of an acid catalyst to form a polyamine; and b) neutralizing the reaction mixture with a base to produce a diphenylmethane series polyamine. Two alcohols are present during and / or after the neutralization step, wherein the molar ratio of alcohol to formaldehyde is at least 0.02: 1. [Selection diagram] None |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2006022100-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2012524746-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-101756998-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2007197448-A |
| priorityDate |
2002-06-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |