http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-944307-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_73ee0bacab5a7576a6a3244747f6ea99 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G69-18 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G69-18 |
| filingDate | 1961-06-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_75a14588d5403cfcdb6284d6d755eaf9 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5d7cae6db6dd67a52e27bd72ec75e24d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_68cea4ca4944aa87b245ff991005cdb2 |
| publicationDate | 1963-12-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-944307-A |
| titleOfInvention | Continuous lactam polymerisation process |
| abstract | A process for the production of polyamides comprises carrying out the following steps in a continuous manner: heating a mixture of at least one monomeric lactam having at least six carbon atoms in the ring with an alkaline polymerization catalyst and a catalyst promoter at a temperature above the melting point of the polymer of said lactam, extruding through a die the product obtained when its viscosity is at or near its maximum value, cooling the extrudate to a temperature below said melting point and maintaining the cooled extrudate at a temperature that is between 60 DEG and 15 DEG C. below said melting point for a period of time which is at least sufficient to cause the polymer formed to become non-tacky. Specified lactams are e -captolactam, oenantholactam, capryllactam, dodecanolactam, a -methyl-e -caprolactam, b :d -dimethyl-e -caprolactam and b -phenyl-e -caprolactam. Specified catalysts are alkali and alkaline earth metals and hydrides, complex hydrides, amides, hydroxides, oxides, alkoxides, carbonates and organo-metallic derivatives thereof and Grignard reagents. Specified calayst promoters are organic isocyanates, e.g. p-phenylene diisocyanate, acid chlorides e.g. terephthaloyl chloride, acid anhydrides e.g. phthatic anhydride, N-carboxy-amino acid anhydries e.g. glycine N-carboxy-anhydride, amides e.g. N:N.diphenyl formamide, sulphonamides e.g. N:N-diphenyl-p-toluene sulphonamide and compounds of the formula R.X.C(:Z).Y.R1 where R and R1 are hydrocarbon residues and X, Y and Z are oxygen, sulphur or -NR11- where R11 is a hydrocarbon residue or hydrogen, many such compounds are specified, examples being dimethyl carbonate, N-methyl ethyl carbamate, 1-methyl-3-ethyl guanidine, dibenzyl imino carbonate, 1-ethyl-3-phenyl-urea, 1:3-dimethyl thiourea, O-ethyl-N-phenyl-isourea, ethyl S-butyl xanthate, N-phenyl S-methyl thiolcarbamate, N-ethyln-butyl-dithiocarbamate, N-ethyl-S-phenyl isothiourea, N-phenyl O-methyl-thioncarbamate, methyl dithiol carbonate and diethyl trithiocarbonate. The example describes the preparation of a polyamide from e -caprolactam in the presence of sodium and diethyl carbonate. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9747596-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5952493-A |
| priorityDate | 1961-06-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 58.