http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-825614-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_14f86e164bb6ab1032c519b42ff81a64 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F26-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F226-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D207-267 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L39-06 |
| filingDate | 1957-05-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1959-12-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-825614-A |
| titleOfInvention | Improvements in or relating to the stabilization of 1-vinyl-2-pyrrolidone |
| abstract | 1-Vinyl-2-pyrrolidone is stabilized against autopolymerization by means of 0.001 to 5% by weight of one or more alkali metal hydroxides, alkoxides, sulphides or carbonates, alone or admixed with sulphur. Storage or distillation without mass polymerization is made possible. The monomer may be separated from the substantially insoluble inhibitor by distillation, decantation or filtration prior to its use in a polymerization reaction. Examples describe the stabilization of the vinyl pyrrolidone with 0.05-0.25% of sodium hydroxide, sodium carbonate, sodium sulphide, alone or with about the same amount of sulphur, and sodium methoxide alone or with about the same amount of sulphur either during storage at 70 DEG C. or distillation under reduced pressure; comparative experiments show the stabilizing or polymerizing effects on vinyl pyrrolidone of sodium bisulphite, sodium meta-bisulphite, copper powder, thiourea, pyrogallol and sulphur alone or admixed with thiourea or pyrogallol and other experiments show that sodium methoxide is effective even in the presence of an equal amount of sodium bisulphite, metabisulphite or thiosulphate. |
| priorityDate | 1956-06-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 36.