http://rdf.ncbi.nlm.nih.gov/pubchem/patent/ES-2846674-T3
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_696ca0ae93d5cf5a686273601361781f |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-582 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2369-00 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-42 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-307 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J3-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-42 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-30 |
| filingDate | 2013-11-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-07-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5d8cf79bc440d55eeaae27b7fbbf270f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_afaf5778bc05e21b28a66de6c101ccfe http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_86092f911512b48b88e9b82a1a464427 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0278d81d1d1c4b5e61f2d3ad39f5fae9 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f60f75f9e2126837a26532f89de4c397 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_345fc3dad04e7b5aa70c3ed3a2b9dad7 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a344c085beae0cfab0b843c129241e30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_15c15ce8e966227a22136c8569306d80 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_672726e5107ae576e7512047cbe51e93 |
| publicationDate | 2021-07-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | ES-2846674-T3 |
| titleOfInvention | Production method of aromatic polycarbonate resin having increased molecular weight |
| abstract | Process for preparing a highly polymerized aromatic polycarbonate resin, comprising the steps of a highly polymerizing step for reacting an aromatic polycarbonate prepolymer and an aliphatic diol compound represented by the following formula (g2) in the presence of a transesterification catalyst to obtain a highly polymerized aromatic polycarbonate resin, a cyclic carbonate removal step to remove at least part of the cyclic carbonate obtained as a by-product in the previous highly polymerizing step out of the reaction system, and a recirculation step to hydrolyze the cyclic carbonate removed in the cyclic carbonate removal step to obtain an aliphatic diol compound and use the obtained aliphatic diol compound as at least a part of the aliphatic diol compound to be used in the highly polymerizing step: **(See formula) ** where, in formula (g2), Ra and Rb rep each independently contain a hydrogen atom, a halogen atom, a linear or branched alkyl group having from 1 to 30 carbon atoms which may contain an oxygen atom or a halogen atom, a cycloalkyl group having from 3 to 30 carbon atoms which may contain an oxygen atom or a halogen atom, an aryl group having 6 to 30 carbon atoms which may contain an oxygen atom or a halogen atom, or an alkoxyl group having 1 to 15 carbon atoms which may contain an oxygen atom or a halogen atom, or Ra and Rb may be bonded together to form a ring; R1 to R4 each independently represent a hydrogen atom, a halogen atom or a linear or branched alkyl group having 1 to 5 carbon atoms; and n represents an integer from 0 to 30, wherein the hydrolysis is alkaline hydrolysis, wherein the terms highly polymerized and highly polymerized indicate that the weight average molecular weight (Mw) of the aromatic polycarbonate resin after reaction is increased by 5,000 or more compared to the weight average molecular weight (Mw) of the aromatic polycarbonate prepolymer; wherein the weight average molecular weight (Mw) is measured as indicated in the description, and wherein the cyclic carbonate removal step is a step of removing a distillate containing at least a portion of the cyclic carbonate formed in the highly polymerizing stage outside the reaction system, wherein the recirculation stage comprises a stage of obtaining a hydrolyzate solution by subjecting the distillate to a hydrolysis treatment and a purification stage of purifying the hydrolyzate solution to separate the compound of aliphatic diol, wherein the purification step comprises an oil-water separation step of separating the hydrolyzate solution into an aqueous phase and an oil phase containing the aliphatic diol compound, and a phase purification step oily phase of purifying the oily phase to remove the aliphatic diol compound, and wherein the oil-water separation step comprises a step of adding an acid to the to hydrolyzate solution. |
| priorityDate | 2012-11-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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