http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-3643730-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_387abf6afc9a2cd5cfa5cd4d35f8b9fe |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2110-0025 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2110-0008 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2650-62 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2190-00 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-183 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-66 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L59-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-092 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-10 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G2-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G2-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-44 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-56 |
| filingDate | 2018-10-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-04-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-3643730-A1 |
| titleOfInvention | Method for the preparation of polyoxymethylene polyoxyalkylene block copolymers |
| abstract | The present invention relates to a process for producing a polyoxymethylene-polyoxyalkylene block copolymer comprising the reaction of a polymeric formaldehyde compound with alkylene oxides in the presence of a double metal cyanide (DMC) catalyst and an H-functional starter substance, the theoretical molar mass of the polymeric formaldehyde compound being smaller than the theoretical Molecular weight of the H-functional starter substance, the polymeric formaldehyde compound having at least one terminal hydroxyl group, the theoretical molar mass of the H-functional starter substance being at least 500 g / mol. Here, the method according to the invention first comprises, in step (i), the preparation of a mixture i) comprising the DMC catalyst and the H-functional starter substance, followed by the addition of the polymeric formaldehyde compound to mixture (i) to form a mixture (ii) in step ( ii) and the addition of the alkylene oxide in step (iii); wherein step (ii) takes place simultaneously or before step (iii). It further relates to polyoxymethylene-polyoxyalkylene block copolymers obtainable by such a method, and to their use for the production of polyurethane polymers. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2022258570-A1 |
| priorityDate | 2018-10-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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