| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c72d118f5664072de841f9c5c34b9d99 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C69-96
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C68-02 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-96
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C68-02 |
| filingDate |
1989-04-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1992-11-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_538433d7f69e8ca31f4ba979f8bc347d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b89bd1247b6c54f7b958352bcea00a82 |
| publicationDate |
1992-11-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-5162564-A |
| titleOfInvention |
Method for making oligomeric carbonate bischloroformates with low phosgene usage |
| abstract |
Oligomeric carbonate bischloroformates are prepared with low phosgene usage by phosgenating a dihydroxyaromatic compound in an interfacial reaction in the presence of small amounts of trialkylamine, preferably, triethylamine. In this invention, the molar ratio of phosgene to dihydroxyaromatic compound, hydrolysis of phosgene, formation of such byproducts as monochloroformates and hydroxyl-terminated polycarbonate oligomers, and batch time are minimized and consumption of the dihydroxylaromatic compound is substantially complete. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5410014-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-4244008-A1 |
| priorityDate |
1989-04-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |