http://rdf.ncbi.nlm.nih.gov/pubchem/patent/ES-2406702-T3
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0b009665becdebf38c989424b45622b6 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08C19-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F136-06 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K3-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08C19-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K3-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F8-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L9-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-54 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F136-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-606 |
| filingDate | 2004-12-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2013-06-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ba3ae89ec887cb04abfeb40de1087c8c http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b1448e7f0098a1f22b693f7e0788dd51 |
| publicationDate | 2013-06-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | ES-2406702-T3 |
| titleOfInvention | Procedure for the preparation of polybutadiene with a low degree of branching |
| abstract | Process for the preparation of polybutadiene with a low degree of branching having the following characteristics: - value of the branching index (gm) less than 1; - value of the damping coefficient (tg δ), defined as the trigonometric tangent of the relationship between the viscous modulus (G ") and the elastic modulus (G ') [tg δ> = G" / G'] measured at 0.01 Hz, 100 ° C and 1% strain, between 0.80 and 1.40; - Mooney viscosity less than 49; - Mw / Mn less than 2.9; - percentage of 1,4-cis units greater than 93%; the above procedure being affected by the polymerization of 1,3-butadiene in the presence of neodymium catalysts, the above procedure comprising: (a) a first stage of polymerization of butadiene in the presence of organic solvents and in the presence of a catalytic system comprising (a1 ) a neodymium derivative selected from neodymium carboxylates with a H2O / Nd molar ratio of less than 1, a -COOH / Nd molar ratio of less than 2; (a2) an aluminum alkyl having the general formula (I) AlR1R2R3 in which R1 and R2, the same or different, are a radical alkyl containing 1 to 10 carbon atoms or a hydrogen atom, R3 is an alkyl radical containing 1 to 10 carbon atoms; (a3) an organoaluminum derivative containing at least one halogen atom, preferably chlorine; the first step above being carried out until a conversion to butadiene> = 98% to provide linear polybutadiene (gm> = 1) with a content of 1,4-cis units higher than 93%, and a Mw / Mn comprised between 2.2 and 2.9; (b) treating the polymer solution obtained at the end of step (a) with a peroxide until polybutadiene with a low degree of branching is obtained; (c) recovering the polybutadiene with a low branching degree obtained at the end of step (b). |
| priorityDate | 2004-01-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 103.