| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c7ad58d3c0b071069a8ee0cb8c8ba2e8 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C263-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C209-78
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-7664 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C265-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C211-50 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G12-08
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/C08G12-40
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-76
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C209-78 |
| filingDate |
2001-08-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2a94a36e3a005ded08620bf6334f24bc
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9b37279be208755e99a0f525f8456e0d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a9ac1780ef104bce4d1be75c1d1a6c12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e9148f283f55da6551fe00e2fc121d4f |
| publicationDate |
2003-03-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
DE-10141620-A1 |
| titleOfInvention |
Process for the preparation of polyisocyanates of the diphenylmethane series with a reduced color value |
| abstract |
The invention relates to a process for the preparation of polyisocyanates of the diphenylmethane series, in which DOLLAR A a) aniline and formaldehyde are converted to polyamines in the presence of an acid catalyst and then DOLLAR A b) the reaction mixture is neutralized with a base at a temperature of above 110 ° C. or after the neutralization with a base the reaction mixture is heated to a temperature above 110 ° C. and then DOLLAR A c) the polyamides are converted into the corresponding polyisocyanates by phosgenation. |
| priorityDate |
2001-08-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |