http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1197366-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_70ec63d39d6704bacc5c7068c93ded43 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-08 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-88 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L67-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-78 |
| filingDate | 1968-08-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f6cdd1189f298ea26dd5b2d5e91d9e7d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_09731cd7eb8fdacd9efabd3e62c108d4 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7fdb9deca4eabcd052bdc3f5435f611f |
| publicationDate | 1970-07-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1197366-A |
| titleOfInvention | Process for the Degassing of Polymers of a beta-Lactone |
| abstract | 1,197,366. Degassing #-lactone polyesters. SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N.V. 26 Aug., 1968, No. 40714/68. Heading C3R. A polyester obtained by the melt polymerization of a #-lactone is freed from volatile impurities by subjecting the polyester in the liquid state to a pressure of at least 1ยข atmospheres (absolute) in contact with a space of lower pressure into which the volatile products enter. Preferably the process is effected in a single- or multiple-screw extruder in which (a) the depth or pitch of the screw(s) decreases in the direction of the discharge side and/or (b) a die with one or more small openings is provided at the discharge side. One or more venting sections to the atmosphere or a vacuum apparatus are attached to the extruder. The polyester may have been obtained by polymerization of the #-lactone in a wiped film reactor, a screw pump or a gear pump and may have been first degassed at atmospheric pressure and thereafter solidified. It may contain a stabilizer or a nucleating agent of which very many are specified. The example describes the degassing of poly-(pivalolactone). |
| priorityDate | 1968-08-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
| Predicate | Subject |
|---|---|
| isDiscussedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/compound/CID6476006 http://rdf.ncbi.nlm.nih.gov/pubchem/substance/SID426113422 |
Total number of triples: 19.