Polymerization of co/olefin with diphosphine containing heterocyclic/alkyl substituents
AssigneeShell Oil Company
InventorsPetrus H. M. Budzelaar, Eit Drent
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Abstract
An improved process for the production of linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon employs a novel catalyst composition formed from a compound of palladium, the anion of a strong non-hydrohalogenic acid and a novel bidentate phosphine ligand wherein each phosphorus has an aliphatic group as one monovalent substituent and as another monovalent substituent a heteroaromatic group connected to the phosphorus by a ring carbon atom. The polymers are useful as thermoplastics.
Claims14
In the process of producing a linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon by contacting the carbon monoxide and hydrocarbon under polymerization conditions in the presence of a reaction diluent and a catalyst composition formed from a compound of palladium, the anion of a strong non-hydrohalogenic acid and a bidentate ligand of phosphorus, the improvement wherein the bidentate ligand is represented by the formula ##STR2## wherein R independently is an alkyl group of 4 carbon atoms inclusive, R' independently is a heteroaromatic group containing up to 10 carbon atoms inclusive with from 4 to 5 carbon atoms in the ring and one heteroatom selected from nitrogen or sulfur in the ring, and R" is a divalent aliphatic group of from 2 to 4 carbon atoms in the bridge linking the two phosphorus atoms.
In the process of producing linear alternating polymer of carbon monoxide and ethylene by contacting carbon monoxide and ethylene under polymerization conditions in the presence of a methanol reaction diluent and a catalyst composition formed from palladium acetate, the anion of trifluoroacetic acid or p-toluenesulfonic acid and a bidentate phosphine ligand, the improvement wherein the phosphine ligand is represented by the formula ##STR3## wherein R independently is alkyl group of 4 carbon atoms, R' independently is a heteroaromatic group containing up to 10 carbon atoms inclusive with from 4 to 5 carbon atoms in the ring and one heteroatom in the ring selected from nitrogen or sulfur, and R" is 1,3-propylene.
In the process of producing a linear alternating terpolymer of carbon monoxide, ethylene, and propylene by contacting the carbon monoxide and hydrocarbons under polymerization conditions in the presence of a reaction diluent and a catalyst composition formed from a compound of palladium, the anion of a strong non-hydrohalogenic acid and a bidentate ligand of phosphorus, the improvement wherein the bidentate ligand is represented by the formula ##STR4## wherein R independently is an alkyl group of 4 carbon atoms inclusive, R' independently is a heteroaromatic group containing up to 10 carbon atoms inclusive with from 4 to 5 carbon atoms in the ring and one heteroatom selected from nitrogen or sulfur in the ring, and R" is a divalent aliphatic group of from 2 to 4 carbon atoms in the bridge linking the two phosphorus atoms.
Dependencies are inferred from the claim text.