Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymer of an ethylenically unsaturated reactant with a...
Patent
1997-03-26
1998-03-31
Acquah, Samuel A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymer of an ethylenically unsaturated reactant with a...
528392, 524701, 524707, 524709, 524712, 502102, 502103, 502202, 502208, C08G 6702
Patent
active
057340102
ABSTRACT:
Linear alternating copolymers of carbon monoxide and at least one compound containing an alkenyl unsaturation are obtained by reaction between carbon monoxide and at least one compound containing an alkenyl unsaturation, in a solvent which is liquid under the operating conditions, in the presence of a preformed bischelated catalyst having general formula (I) active without cocatalysts:
wherein: chel and chel', the same or different, represent a nitrogenated or phosphorated bidentate chelating agent, and A.sup.- represents an essentially non-co-ordinating, non-esterifiable and non-labile anion selected from (3,5-(CF.sub.3).sub.2 -C.sub.6 H.sub.3).sub.4 B.sup.-, tetra(perfluorophenyl)borate B(C.sub.6 F.sub.5).sub.4.sup.- and Al(C.sub.6 F.sub.5).sub.4.sup.-.
REFERENCES:
patent: 5218085 (1993-06-01), De Jong et al.
patent: 5420236 (1995-05-01), Keijsper et al.
Garbassi Fabio
Mestroni Giovanni
Milani Barbara
Sommazzi Anna
Acquah Samuel A.
Enichem S.p.A.
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