http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109761903-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D229-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D229-00 |
| filingDate | 2018-12-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-07-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-07-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-109761903-B |
| titleOfInvention | Preparation method of polyisocyanate containing uretdione group |
| abstract | The invention discloses a preparation method of polyisocyanate with uretdione groups, wherein diisocyanate monomers with the total mass M in a reaction system are subjected to polymerization reaction under the catalysis of tertiary phosphine to prepare polyisocyanate containing the uretdione groups, the reaction is terminated when the ratio of the consumed mass M1 of the diisocyanate monomers in the system to the total mass M of the diisocyanate monomers reaches a required ratio, unreacted diisocyanate monomers in the system are removed and reused in the system, and the content of phosphine oxide in the unreacted diisocyanate monomers is controlled not to exceed 1wt%, preferably not to exceed 0.5wt% before the unreacted diisocyanate monomers removed from the system are reused in the system. The uretdione isocyanate homopolymer prepared by the method has low color number and good storage stability. |
| priorityDate | 2018-12-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 101.