Polymer preparation

Details Polymer preparation Polymer preparation

C - Chemistry, Metallurgy

08

G

402/7.1

C08G 67/02 (2006.01) B01J 31/04 (2006.01) B01J 31/18 (2006.01)

Patent

CA 1271877

A B S T R A C T Process for the preparation of polymers characterized in that a mixture of carbon monoxide and ethene is polymerized at an overall pressure of between 75 and 250 bar and an ethene/carbon monoxide partial pressure ratio of between 0.75 and 3 by using a catalyst composition based upon a) a palladium compound, b) an anion of an acid with a pKa of less than 2, provided that the acid is not a hydrohalogenic acid, and c) a bidentate ligand of the general formula R1R2-M-R-M- R3R4, wherein M represents phosphorus, arsenic or antimony, R1, R2, R3 and R4 represent hydrocarbyl groups which may or may not be substituted with polar groups and R represents a bivalent organic bridging group which contains at least two carbon atoms in the bridge. The process carried out under these conditions is characterized by an increased reaction rate and produces polymers having high molecular weight, which makes them a valuable material for shaping objects.

531704

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