http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7666977-B2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6842ac50cf3ca2352074cb3a75079618 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G71-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-64 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-00 |
| filingDate | 2007-05-03^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2010-02-23^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_dd73b2b3f0c7fbe412b4b46b7c6ac555 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6ab45188160d26e643b940525aa8917e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8ac4ab10ea99c7566f632016a9037e8d |
| publicationDate | 2010-02-23^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-7666977-B2 |
| titleOfInvention | Poly(carbonate-co-urea) copolymers and melt transesterification method of preparing these copolymers |
| abstract | Disclosed herein is a process to prepare a poly(carbonate-co-urea) copolymer comprising reacting in the melt: (a) a dihydroxy reaction component comprising a dihydroxy compound, (b) a diaryl carbonate reaction component comprising a diaryl carbonate, (c) a urea reaction component comprising a urea compound in the presence of (d) a transesterification catalyst during at least part of the reaction and removing a phenolic byproduct to produce a poly(carbonate-co-urea) copolymer, wherein the urea and dihydroxy compounds are reacted in a molar ratio: (total moles of urea compound)/((total moles of urea compound)+(total moles of dihydroxy compound)) of less than or equal to 0.5. |
| priorityDate | 2007-05-03^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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