http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2021110691-A1
Outgoing Links
Predicate | Object |
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assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_efbc93fa15ca59046e84ca5c5c84c433 |
classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-2663 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-34 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-2603 |
classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-34 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-26 |
filingDate | 2020-12-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f6f3c138a55464c8317936ecd3621588 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2e323d6d8010184c35a760affb91a155 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_62990bf17658f1c7b6291b3f76752754 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5cd01eb1017a5ac5591ace14d5af53d6 |
publicationDate | 2021-06-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
publicationNumber | WO-2021110691-A1 |
titleOfInvention | Process for producing polyether carbonate polyols |
abstract | The present invention relates to a process for producing polyether carbonate polyols comprising the step of reacting alkylene oxide with carbon dioxide in the presence of an H-functional starter compound and double metal cyanide catalyst, characterized in that (α) a subamount of H-functional starter substance and/or suspension medium containing no H-functional groups is initially charged in a reactor in each case together with DMC catalyst, (β) the mixture from step (α) is admixed with a subamount of alkylene oxide at temperatures of 90°C to 150°C and wherein the addition of the alkylene oxide is then interrupted, (γ) alkylene oxide, carbon dioxide and a mixture containing unactivated double metal cyanide catalyst and an H-functional starter compound, wherein the H-functional starter compound is a polyol having a number-average molar mass according to DIN 55672-1 of 550 to 2000 g/mol, is continuously added to the mixture resulting from (β). |
priorityDate | 2019-12-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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