http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-1047691-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1374dd16777534b65ad4422333245af8 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-826 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D01F6-62 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-82 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-82 |
| filingDate | 1976-01-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1979-01-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4cc06431a1fe756973eeadd4121e2cd7 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a4131b13ffb488ed06b74ea2d189fa57 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_86e4a7d734ffa5fda15dda44d0208106 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f557eeb46ab7951518ff6f0e90305445 |
| publicationDate | 1979-01-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-1047691-A |
| titleOfInvention | Process for preparing polyesters |
| abstract | Abstract of the Disclosure A process for preparing a polyester which comprises reacting a di-lower alkyl ester of a difunctional carboxylic acid at least 90 mole % of which consists of terephthalic acid with a polymethylene glycol containing 2 to 10 carbon atoms at least 90 mole % of which consists of ethylene glycol in the presence of an ester-interchange reaction catalyst to form an ester-interchange reaction product, and then polycondensing it in the presence of a polycondensation catalyst, wherein a substantially uniform solution in ethylene glycol of (A) 20 to 150 millimole %, based on said di-lower alkyl ester of the difunctional carboxylic acid, of calcium acetate and (B) 2 to 25 millimole %, based on said di-lower alkyl ester, of cobalt acetate is used as the ester-interchange reaction catalyst. The fiber-forming polyester thus produced has enhanced whiteness over similar known polyesters which disadvan-tageously exhibit yellowness. |
| priorityDate | 1975-12-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 95.