http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2037583-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a526baeaf0a6e90f4a91d4dbfd619756 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S526-903 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F136-06 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F136-06 |
| filingDate | 1991-03-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d7896e86cc6c7bde358eaf98ada940bd |
| publicationDate | 1992-07-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2037583-A1 |
| titleOfInvention | Technique for reducing the molecular weight and broadening the molecular weight distribution of high cis-1,4-polybutadiene |
| abstract | Abstract of the Disclosure TECHNIQUE FOR REDUCING THE MOLECULAR WEIGHT AND BROADENING THE MOLECULAR WEIGHT DISTRIBUTION OF HIGH CIS-1,4-POLYBUTADIENE High cis-1,4-polybutadiene can be synthesized by polymerizing 1,3-butadiene monomer with a three component nickel catalyst system containing (a) an organonickel compound, (b) an organoaluminum compound, and (c) a fluorine containing compound. However, the molecular weight of the high cis-1,4-polybutadiene prepared is typically too high to be utilized as a non-oil extended rubber. This invention is based upon the discovery that halogenated phenols act to reduce the molecular weight and to increase the molecular weight distribution of high cis-1,4-polybutadiene prepared with such nickel based catalyst systems. The use of halogenated phenols as modifiers in such polymerizations does not change the microstructure of the high cis-1,4-polybutadiene produced. Accordingly, the present invention specifically discloses a process for producing high cis-1,4-polybutadiene having a reduced molecular weight and broad molecular weight distribution which comprises polymerizing 1,3-butadiene in the presence of (a) an organonickel compound, (b) an organoaluminum compound, (c) a fluorine containing compound, and (d) a halogenated phenol. |
| priorityDate | 1991-01-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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