http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1211946-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_e2c9efaea5dccdc8052bc4dd188eafd9 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F236-10 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F236-10 |
| filingDate | 1968-12-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1970-11-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1211946-A |
| titleOfInvention | Preparation of copolymers using organolithium/pyridine compound catalyst system |
| abstract | 1,211,946. An organolithium-pyridine compound polymerization catalyst. BRIDGESTONE TIRE K.K. 13 Dec., 1968 [22 Dec., 1967], No.59558/68. Heading C3P. A conjugated diene and vinyl aromatic compound are copolymerized in an anhydrous hydrocarbon reaction medium at from -80 C. to 150 C. in the presence of catalyst consisting of an organolithium compound and a pyridine compound of formula wherein R<SP>2</SP>-R<SP>6</SP> is hydrogen or a hydrocarbon radical and at least two of R<SP>2</SP>-R<SP>6</SP> are alkyl, alkenyl, cycloalkyl or aralkyl radicals. The amount of organolithium compound is from 0À01-100 m. moles per mole of monomer, and the mole ratio of the pyridine compound to the organolithium compound is from 0.5 to 10À0. Preferred pyridine compounds are lutidines, collidines and pentamethylpyridine. In the examples, 1,3 butadiene or isoprene are copolymerized with styrene in a hydrocarbon solvent in the presence of a catalyst consisting of butyl lithium, phenyl lithium or dilithiostilbene and one of the preferred pyridine compounds. The polymer is extracted by conventional means and may be vulcanized. Comparative examples illustrate the use as an additive to the organolithium catalyst of triethylamine, N,N-diethylaniline, pyridine and quinoline. |
| priorityDate | 1967-12-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 36.