http://rdf.ncbi.nlm.nih.gov/pubchem/patent/ES-2546382-T3
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_96ec3985e3ce9b24614fb87bf51a4f12 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T428-31667 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-2534 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-307 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-30 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-24 |
| filingDate | 2008-05-07^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2015-09-23^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_04b099a42a4fd1b43ec51529c681f3c1 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b94c34db78ddb0c996c1c843e844767f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_93e3d95fa9c3c235907947e913abe28a |
| publicationDate | 2015-09-23^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | ES-2546382-T3 |
| titleOfInvention | Polycarbonate preparation process according to the melt transesterification procedure |
| abstract | Polycarbonate preparation process according to the melt transesterification process, in which at least one dihydroxyaryl compound is reacted with at least one diaryl carbonate, using at least one catalyst in a multi-stage process, characterized in that at the melt from the last reaction stage is added at least one inhibitor and in the last reaction stage or after the same one or more aromatic hydroxycarboxylic acids are added, in which the hydroxycarboxylic acid (s) are one or more compound (s) of the general formulas (VI), (VII) or (VIII), which are used in a range of 5 to 500 ppm with respect to polycarbonate, ** Formula ** in which R2, R2 ', independently of one another represent a C1-C10 alkyl radical, C6-C34 aralkyl, preferably represent a linear or branched C1-C4 alkyl radical, R3, R3', independently of each other, represent H, a C1-alkyl radical C10-carbonyl or aryl C6-C34-carbo nyl, preferably represent H or a methylcarbonyl, ethylcarbonyl, propylcarbonyl, phenylcarbonyl, butylcarbonyl radical and very particularly preferably represent H or a methylcarbonyl radical, l represents 1 or 2, preferably represents 1, n represents 0 or an integer from 1 to 3, preferably represents 0 or 1, m represents 1 or 2, preferably represents 1, Y represents a divalent residue made up of 1 to 8 C atoms and / or heteroatoms, preferably represents -C (R5) (R6) -, - ( C R5R6) m-, -O -, - S -, - S (> = O) -, -S (> = O) 2-, - (C> = O) -, - O (C> = O) O-, -OC (R5R6) O-, particularly preferably represents -C (R5) (R6) -, in which R5 and R6, independently of each other, represent a C1-C10 alkyl radical, preferably represent a C1-C6 alkyl radical, particularly preferably represents methyl, and X represents a C1-C10 alkyl, C1-C10 alkyl-phenyl or phenyl radical, particularly preferably represents a phenyl radical. |
| priorityDate | 2007-05-11^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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