Polymerization of co/olefin with sets of temperature/pressure conditions
AssigneeShell Oil Company
InventorsLeonardus Petrus, Philip J. M. Maurice de Smedt
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Abstract
Novel, linear alternating polymer compositions of carbon monoxide and at least one ethylenically unsaturated hydrocarbon having a relatively wide molecular weight range are produced by contacting ethylene and unsaturated hydrocarbon in the presence of a polymerization catalyst under different polymerization conditions of temperature and pressure. One set of polymerization conditions will have a higher reaction temperature and a lower reaction pressure than another.
Claims10
In the process of producing a linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon by contacting carbon monoxide, and an ethylenically unsaturated hydrocarbon, under polymerization conditions in the presence of a liquid reaction diluent and a catalyst composition formed from a palladium compound, the anion of a strong non-hydrohalogenic acid and a bidentate ligand of phosphorus or nitrogen, the improvement wherein a polymer having a relatively wide molecular weight distribution is produced with at least two different sets of polymerization conditions, the reaction temperature of one set of polymerization conditions being higher and the reaction pressure being lower than the temperature and pressure of the other set of polymerization conditions, and wherein the two sets of polymerization conditions have a difference of at least 5.degree. C. in temperature and at least 5 bar in pressure.
In the process of producing a linear alternating copolymer of carbon monoxide and ethylene by contacting carbon monoxide and ethylene under polymerization conditions in the presence of a liquid reaction diluent and a catalyst composition formed from a palladium alkanoate, the anion of trifluoroacetic acid or p-toluenesulfonic acid and a bidentate ligand of phosphorus, the improvement wherein a copolymer product having a relatively wide molecular weight distribution is produced with at least two different sets of polymerization conditions, the reaction temperature of one set of polymerization conditions being higher and the reaction temperature being lower than the reaction temperature and pressure of the other set of polymerization conditions, and wherein the two sets of polymerization conditions have a difference of at least 5.degree. C. in temperature and at least 5 bar in pressure.
In the process of producing a linear alternating terpolymer of carbon monoxide, ethylene and propylene under polymerization conditions in the presence of a liquid reaction diluent and a catalyst composition formed from a palladium alkanoate, the anion of trifluoroacetic acid or p-toluenesulfonic acid and a bidentate ligand of phosphorus, the improvement wherein a terpolymer product of relatively wide molecular weight distribution is produced with at least two different sets of polymerization conditions, the reaction temperature of one set of polymerization conditions being higher and the reaction pressure being lower than the temperature and pressure of the other set of polymerization conditions.
Dependencies are inferred from the claim text.