http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1078812-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_bea23fc24859bc4382f3cd71d006cd4b |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-64 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-195 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-193 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-64 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-195 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-193 |
| filingDate | 1965-01-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1967-08-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1078812-A |
| titleOfInvention | Improvements in or relating to the preparation of copolyesters |
| abstract | Copolyesters are made by (a) heating a mixture of a diaryl terephthalate and/or isophthalate (100 mol. per cent), a diaryl ester of carbonic or oxalic acid (0-10 mol per cent) and a dihydric phenol (at least 100 mol per cent) until the melt viscosity of the mixture is at least 2000 poises, (b) adding to the reaction product at least 15% by weight, calculated on the polyester which should theoretically derive from (a) of a linear polyester of terephthalic and/or isophthalic acid and a diprimary alcohol and having a viscosity number of 0.1 to 0.5 and (c) continuing the polycondensation at an elevated temperature. Specified dihydric phenols are resorcinol, hydroquinone and bisphenol A whilst specified dihydric alcohols are ethylene glycol and other polymethylene glycols, 2:2-dimethyl - 1:3 - propanediol, dimethylol cyclohexanes, di-, tri-, tetra- and penta-ethylene glycol and hydroxyethylation products of resorcinol, hydroquinone and bisphenol A. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1317497-A4 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1317497-A1 |
| priorityDate | 1963-09-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 50.