| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_efbc93fa15ca59046e84ca5c5c84c433 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2650-62
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2190-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2110-0025
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2110-0008 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-56
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-66
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-092
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-183
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L59-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2-38 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L59-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G2-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G2-38 |
| filingDate |
2019-10-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1b6fae8dc353c3d3d8ac57f27654d7bd
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c246b1d3468ec671b2e7e6821af4b9c0
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cd4ec3426da097acb6cfd2b5ee8632ad
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c63126edfd9b388a1bb454bb58416c18 |
| publicationDate |
2022-02-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-2022049042-A1 |
| titleOfInvention |
Method for producing polyoxymethylene polyoxyalkylene block copolymers |
| abstract |
The invention relates to a method for producing a polyoxymethylene polyoxyalkylene block copolymer, said method including the process of reacting a polymer formaldehyde compound with alkylene oxide in the presence of a double metal cyanide (DMC) catalyst and an H-functional starter substance, wherein the theoretical molar mass of the polymer formaldehyde compound is lower than the theoretical molar mass of the H-functional starter substance, and the polymer formaldehyde compound has at least one terminal hydroxyl group, the theoretical molar mass of the H-functional starter substance being at least 500 g/mol. In the method according to the invention, a mixture i) is provided comprising the DMC catalyst and the H-functional starter substance in step (i); the polymer formaldehyde compound is then added to the mixture (i) in step (ii), thereby forming a mixture (ii); and the alkylene oxide is added in step (iii), step (ii) being carried out at the same time as or prior to step (iii). |
| priorityDate |
2018-10-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |