http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0906345-B1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9ce023a6c13740cb05a67332f11a29f9 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F8-22 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F8-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F8-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F12-08 |
| filingDate | 1997-05-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2005-04-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9cd9aa1294c08c29ca0fc1ed9e479dad http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4c7f5b27d09962fd6ca9a174c10fc675 |
| publicationDate | 2005-04-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0906345-B1 |
| titleOfInvention | Brominated polystyrene having improved thermal stability and color and process for the preparation thereof |
| abstract | In a process for the suppression of backbone halogenation during the bromination of polystyrenes comprising the step of pretreating a solution of a polystyrene reactant comprising from about five to about 20 percent by weight of a polystyrene reactant, in a halogenated hydrocarbon solvent with at least about 0.1 percent by weight of an additive to suppress halogenation of the polystyrene backbone prior to brominating the polystyrene in the presence of a catalyst; adding a metal halide bromination catalyst to the solution, capable of effecting bromination of the ring without causing crosslinking of the polystyrene; adding to the solution from about 1 to about 3.4 moles of a brominating agent, per mole of polystyrene repeating units; reacting the polystyrene reactant with the brominating agent at a reaction temperature of from about -20° C. to about 50° C., and isolating the brominated polystyrene. A brominated polystyrene is also provided having a backbone halogen content of less than about 750 ppm and, a DELTAE color as low as about 5. |
| priorityDate | 1996-06-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 60.