Process for preparing narrow molecular weight distribution syndi

Details Process for preparing narrow molecular weight distribution syndi Process for preparing narrow molecular weight distribution syndi

1992-04-29

1993-06-08

Henderson, Christopher

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526170, 526328, 526329, 5263297, C08F 452

Patent

active

052180646

ABSTRACT:
A process for preparing a narrow molecular weight distribution syndiotactic polymer or copolymer of an unsaturated carboxylic acid ester (e.g., acrylate or methacryrate) by using, as an initiator, at least one organometallic compound of the group consisting of (a) trivalent organic Y compounds, and (b) trivalent organic lanthanide (La, Ce, Pr, Nd, Pm, Sm, Eu, Ga, Tb, Dy, Ho, Er, Tm, Yb, Lu) compounds, or a combination thereof with an organoaluminum compound having the formula:

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P. L. Watson et al., "Homogeneous Lanthanide Complexes as Polymerization and . . . Studies", J. American Chemical Society Symposium Ser, vol. 212, pp. 459-479 (1983).
W. J. Evans et al., "Organolanthanide Hydride Chemistry. 3. Reactivity of . . . Complex", J. American Chemical Society, vol. 105, pp. 1401-1403 (1983).
G. Jeske et al., "Highly Reactive Organolanthanides. Systematic Routes to and . . . Complexes", J. American Chemical Society, vol 107, pp. 8091-8103 (1985).

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