http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-111961185-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2101-00 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D71-021 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D53-228 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-7664 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-7812 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D67-0039 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-48 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D69-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D69-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D71-022 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D71-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D67-0067 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-725 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G101-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C263-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C263-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C263-00 |
| filingDate | 2020-08-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-07-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-07-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-111961185-B |
| titleOfInvention | A kind of polymethylene polyphenyl polyisocyanate composition and preparation method thereof |
| abstract | The invention provides a polymethylene polyphenyl polyisocyanate composition and a preparation method thereof. The HCl stripping process is adopted in the preparation process, by controlling the content of impurities in HCl (including COCl 2 , PI (phenyl isocyanate), MDI (diphenylmethane series diisocyanate) these substances that potentially affect the content of phosgene adducts) , can effectively control the phosgene adduct content in the reaction liquid after HCl stripping, improve the curing rate of the polymethylene polyphenyl polyisocyanate composition in the production process, and the compressive strength of the foam after foaming with polyether. Moreover, the HCl stripping process is simple, the operation cost is low, the operation is convenient, and has certain effects on improving the production efficiency of the product and improving the application performance of the product. |
| priorityDate | 2020-08-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 53.