http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1097058-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c7ad58d3c0b071069a8ee0cb8c8ba2e8 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-307 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-30 |
| filingDate | 1966-03-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a2962152c0c7ef57c34603d6ca5065f2 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_60082d9876ab1a5cae99f18c30f3661c http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2cbc5a4f988c87a8fab7cecae50d2b25 |
| publicationDate | 1967-12-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1097058-A |
| titleOfInvention | Process for the production of high molecular weight thermoplastic polycarbonates by the transesterification process |
| abstract | In the manufacture of polycarbonates by trans-esterification of a diester of carbonic acid with a dihydric phenol or of a bis-aryl, bis-alkyl or bis-cycloalkyl carbonate of a dihydric or bis-cycloalkyl carbonate of a dihydric phenol by itself or with a dihydric phenol, there is used an acid catalyst having a pK value at 25 DEG C. of between 2 and 10 and which is (a) an organic acid, (b) an acid reacting ester, salt or ester-salt of an organic acid or inorganic oxyacid. Specified catalysts are phenyl phosphonic acid and its acid alkali metal salts, phenylboric acid and its acid alkali metal salts, quinoline - 5 - sulphonic acid, quinoline - 8 - sulphonic acid, 2-hydroxycarbazole-sulphonic acid - 7, aniline - N - methane - sulphonic acid, aniline - N - phenylsulphonic acid - 4, N-methylamino - ethane sulphonic acid, stearic acid, heptadecane - 1:8 - dicarboxylic acid and its acid alkali metal salts, 4-phthalimidododecanoic acid, phosphoric acid monophenyl ester and its acid alkali metal salts and 2-N-phenylamino benzoic acid. Preferably transesterification is effected at 160-320 DEG C., the temperature being raised gradually and the pressure being reduced gradually to a final value of about 1 mm. of Hg. Examples describe the manufacture of polycarbonates by transesterifying (1) and (2) Diphenyl carbonate and bisphenol-A or a mixture thereof with 1,1-bis-(4 - hydroxyphenyl) cyclohexane; (3) Bisphenol - A - bisphenyl carbonate. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-2552995-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5142018-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5151491-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7107925-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5097002-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5276129-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2011120921-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5340905-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5314985-A |
| priorityDate | 1965-03-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 60.