| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ce67b9d74064fed5f9a58c47d2251a8f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b992e5f7a0ebce9c8b6dff49206f2764 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-14 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-14 |
| filingDate |
2013-09-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_07c62183f19431cf592659e173312941
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9033c60742be39d4b7c9d343695c08f7
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_eb4c4d10e71989c1b7a34056a3579012
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6fdf850a337e2d787ecf2db697c0afdd
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b93a7fc5685df15d4d0f5cb76434b715
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_de4f98edf09e172bdc4e1d3f3396989e |
| publicationDate |
2016-07-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-3040359-A1 |
| titleOfInvention |
Method for preparing polycarbonate with continuous two-phase interface phosgene method |
| abstract |
The present invention relates to a method for preparing branched polycarbonate with a continuous two-phase interface phosgene method. Firstly, an aqueous solution of alkali metal hydroxide with triphenol and polyphenol dissolved therein reacts with a certain amount of phosgene in the present of inert organic solvent to prepare a prepolymer, and then a coupling reaction is performed among the prepolymer, an aqueous solution of alkali metal hydroxide with bisphenol and phosgene dissolved therein to finally obtain a polycarbonate resin. The method can avoid a cross-linking reaction, reduce the cost and improve the quality of the product, while improving the conversion ratio of the branching agent and the branching degree of the product. |
| priorityDate |
2013-08-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |