Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Patent
1992-11-30
1993-08-10
Garvin, Patrick P.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
502104, 502111, 502125, 502127, 526125, C08F 4649
Patent
active
052348792
ABSTRACT:
When asymmetric olefins or a monomer mixture containing asymmetric monomers is polymerized by a catalyst composition containing esters of carboxylic acid e.g. as a so-called donor, and alcohol the ester group can be transesterified with the alcohol to an ester containing another alkyl group during the preparation and/or polymerization of the catalyst. This is advantageous particularly when an adduct of a so-called spray-crystallized Mg-halide and alcohol is used as the catalyst carrier, because the alkoxy group of the alcohol of the carrier and the alkoxy group of the ester of the donor can be transesterified and thus obtain the preferable effects of both esters on the run of the polymerization reaction. Hereby, a solvent having a high boiling point should be used as the intermediate agent, so that the transesterification reaction can take place. Most preferable have been found hydrocarbons having high boiling points, especially nonane and decane.
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patent: 4950630 (1990-08-01), Murata et al.
patent: 4959427 (1990-09-01), Furuhashi et al.
Chien et al; J. Polymer Science Part A: Polymer Chemistry, 28, No. 1, pp. 273-284 (Jan. 1990).
Garoff Thomas
Iiskola Eero
Leinonen Timo
Garvin Patrick P.
Neste Oy
Peebles Brent M.
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