http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1104321-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_59aeacfc8c0fb15a69d7dd77723e2c36 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F10-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F10-00 |
| filingDate | 1965-05-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1968-02-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1104321-A |
| titleOfInvention | Improvements in or relating to titanium polymerization catalyst and use thereof |
| abstract | A crystalline polyolefin consisting essentially of a mass of uniformly shaped, spheroidal particles having smooth, irregularly undulate surfaces, a mean maximum dimension X, in the range of 1 to 75 microns, of which at least 50% by number of the particles have said maximum dimension X and the remainder of the particles have a maximum dimension within plus or minus 50% of X are made by polymerizing an olefin in the presence of a polymerization catalyst in the form of spheroidal particles of nearly uniform size, and of mean maximum dimension in the range of from 0.5 to 10 microns, comprising TiCl3, co-crystallized with AlCl3, or with AlCl3, and an organoaluminium halide. The titanium trichloride component is preferably made by reducing TiCl4 with an organoaluminium compound in an organic liquid in which both reactants are soluble whilst subjecting the reaction mixture to ultrasonic vibration. The polymerization conditions are conventional. Molecular weight and viscosity modifiers may be present. Specified crystalline polymers are poly(butene-1), poly(4-methylpentene-1), polystyrene, polypropylene, and polyethylene, of which the last two are exemplified.ALSO:TiCl3 co-crystallized with AlCl3 in the form of spheroidal particles of nearly uniform size with a mean maximum dimension in the range of from 0.5 to 10 microns is made by reducing TiCl4 with an organoaluminium compound in an inert organic liquid medium in which both reactants are soluble whilst subjecting the reaction mixture to ultrasonic vibration and separating the finely divided solid which precipitates from the medium. The organoaluminium compound may be tri-ethyl or tripropyl aluminium, or diethyl-, dipropyl-, or diisobutyl-aluminium chloride, or ethyl-, isopropyl-, or isobutyl-aluminium dichloride, and mixtures of the mono- and di-chlorides. The liquid medium may be a saturated liquid aliphatic or cycloaliphatic hydrocarbon, or a halogenated aliphatic or aromatic hydrocarbon, or mixtures thereof. In Example I, TiCl4 dissolved in n-hexane was subjected to ultrasonic vibrations at 25,000 c.p.s., and a solution of ethylaluminium sesquichloride in n-hexane added over a period of five hours with gentle mechanical stirring, whilst in Example II, a solution of ethylaluminium sesquichloride in n-hexane was gently stirred and subjected to ultrasonic vibrations at 40,000 c.p.s., and over a period of 3 hours and 40 minutes pure TiCl4 added. The precipitate may be "aged" at 95 DEG C. for four hours. |
| priorityDate | 1964-05-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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