http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1043160-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9e5302e08e56037ff7bc5c9b6fcc29f9 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-307 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C68-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C69-96 |
| filingDate | 1963-06-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1966-09-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1043160-A |
| titleOfInvention | Improvements in and relating to polycarbonate resins |
| abstract | Polycarbonates are made by heating (a) a dihydric phenol and (b) phosgene or a bis-chloroformate of a dihydric phenol; the reaction being effected under anhydrous conditions in the presence of a salt of a non-amphoteric metal and a dihydric phenol as catalyst. The preferred metal is Be, Mg, Ca, Sr, Ba or Mn, and the diphenate catalysts may be formed in situ by adding to the reaction mixture the free metal or an inorganic salt thereof, e.g. a chloride, bromide, iodide, sulphate, nitrate, phosphate or silicate. The reaction may be effected in the absence or presence of a solvent, e.g. benzene, toluene, xylene, chloroform, carbon tetrachloride, 1:2:4-trichloroethane, tetrachloroethane, chlorobenzene or o-dichlorobenzene. Examples describe the preparation of polycarbonates by reacting (1) bisphenol A and its bischloroformate; (2)-(6) phosgene and bis - (4 - hydroxyphenyl) - sulphone, bis - (4-hydroxy - 3 - chlorophenyl) - methane, bis-phenol A, bis-(3,5-diethyl-4-hydroxyphenyl)-1,1 - cyclohexane, bis - (4 - hydroxyphenyl)-methane. |
| priorityDate | 1962-07-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 59.