The invention provides a process for preparing polyether carbonate polyols by addition of alkylene oxides and carbon dioxide onto H-functional starter substance in the presence of a double metal cyanide (DMC) catalyst or in the presence of a metal complex catalyst based on the metals zinc and/or cobalt, wherein (γ) alkylene oxide and carbon dioxide are added onto H-functional starter substance in a reactor in the presence of a double metal cyanide catalyst or in the presence of a metal complex catalyst based on the metals zinc and/or cobalt, wherein a reaction mixture comprising the polyether carbonate polyol is obtained, and wherein (δ) the reaction mixture obtained in step (γ) remains in the reactor or is transferred continuously into a postreactor, wherein the content of free alkylene oxide in the reaction mixture is reduced in each case in the manner of a postreaction, characterized in that a component K is added during the postreaction, component K being selected from at least one compound containing a phosphorus-oxygen-hydrogen group.

The invention provides a process for preparing polyether carbonate polyols by addition of alkylene oxides and carbon dioxide onto H-functional starter substance in the presence of a double metal cyanide (DMC) catalyst or in the presence of a metal complex catalyst based on the metals zinc and/or cobalt, wherein (γ) alkylene oxide and carbon dioxide are added onto H-functional starter substance in a reactor in the presence of a double metal cyanide catalyst or in the presence of a metal complex catalyst based on the metals zinc and/or cobalt, wherein a reaction mixture comprising the polyether carbonate polyol is obtained, and wherein (δ) the reaction mixture obtained in step (γ) remains in the reactor or is transferred continuously into a postreactor, wherein the content of free alkylene oxide in the reaction mixture is reduced in each case in the manner of a postreaction, characterized in that a component K is added during the postreaction, component K being selected from at least one compound containing a phosphorus-oxygen-hydrogen group.

The present invention relates to a linear inorganic coordination polymer and a metal complex compound which are prepared in the form of a metal nanostructure having various stereo structures and thus can be used as a catalyst or the like having an excellent activity in preparing a polyalkylene carbonate resin and the like, and a metal nanostructure and a catalyst composition comprising the same. The linear inorganic coordination polymer comprises a repeating unit having a form in which a predetermined oxalic acid derivative is coordinately bonded to a transition metal, and the metal complex compound comprises a plurality of linear inorganic coordination polymer chains and has a structure in which the plurality of polymer chains are linked to each other via a predetermined neutral ligand.

Polycarbonate polyols are made by copolymerizing carbon dioxide and an alkylene oxide in the presence of a starter compound and a carbonate catalyst. The process is operated in semi-batch mode by combining starter, catalyst and a small amount of alkylene oxide in a reaction vessel, pressurizing the vessel with carbon dioxide, initiating polymerization, and then feeding both carbon dioxide and alkylene oxide to the vessel under polymerization conditions without removal of product until the feeds are completed.

Polycarbonate polyols are made by copolymerizing carbon dioxide and an alkylene oxide in the presence of a starter compound and a carbonate catalyst. The process is operated in semi-batch mode by combining starter, catalyst and a small amount of alkylene oxide in a reaction vessel, pressurizing the vessel with carbon dioxide, initiating polymerization, and then feeding both carbon dioxide and alkylene oxide to the vessel under polymerization conditions without removal of product until the feeds are completed.

In one aspect, the present invention encompasses blends of structurally different polycarbonate polyols, resulting polyurethanes derived from such blends of polyols, methods of making such polyurethane compositions, and coatings and adhesives derived from such polyurethane compositions.

In accordance with one or more embodiments of the present disclosure, a process includes introducing a mixture comprising polypropylene carbonate (PPC) polyol, carbon dioxide, propylene oxide, and at least one dibasic ester to a quenching vessel to separate the PPC polyol from the carbon dioxide and the propylene oxide; introducing additional dibasic ester to the separation vessel, thereby separating the carbon dioxide from the propylene oxide and the dibasic ester such that a mixture of propylene oxide and the dibasic ester is formed; and introducing the mixture of propylene oxide and the dibasic ester to a recovery vessel, wherein the propylene oxide is separated from the dibasic ester in the recovery vessel.

A process for continuous production of polyether carbonate polyols by the addition of alkylene oxide and carbon dioxide in the presence of a DMC catalyst or a metal complex catalyst based on the metals cobalt and/or zinc, onto an H-functional starter substance is provided. Wherein (γ) the H-functional starter substance, alkylene oxide and catalyst are continuously metered into the reaction during the addition and the resulting reaction mixture is continuously discharged from the reactor, wherein (i) before step (γ), a suspension of catalyst in suspension medium and/or H-functional starter substance in the reactor is adjusted to a temperature T.sub.1 ranging from 100° C. to 150° C., wherein T.sub.1 is at least 10% above a temperature T.sub.2 and T.sub.2 is a temperature ranging from 50° C. to 135° C., and (ii) from commencement of the addition of alkylene oxide in step (γ) the temperature is continuously reduced to the temperature T.sub.2.

A process for continuous production of polyether carbonate polyols by the addition of alkylene oxide and carbon dioxide in the presence of a DMC catalyst or a metal complex catalyst based on the metals cobalt and/or zinc, onto an H-functional starter substance is provided. Wherein (γ) the H-functional starter substance, alkylene oxide and catalyst are continuously metered into the reaction during the addition and the resulting reaction mixture is continuously discharged from the reactor, wherein (i) before step (γ), a suspension of catalyst in suspension medium and/or H-functional starter substance in the reactor is adjusted to a temperature T.sub.1 ranging from 100° C. to 150° C., wherein T.sub.1 is at least 10% above a temperature T.sub.2 and T.sub.2 is a temperature ranging from 50° C. to 135° C., and (ii) from commencement of the addition of alkylene oxide in step (γ) the temperature is continuously reduced to the temperature T.sub.2.

In one aspect, the present disclosure encompasses polymerization systems for the copolymerization of CO.sub.2 and epoxides comprising 1) a catalyst including a metal coordination compound having a permanent ligand set and at least one ligand that is a polymerization initiator, and 2) a chain transfer agent having two or more sites that can initiate polymerization. In a second aspect, the present disclosure encompasses methods for the synthesis of polycarbonate polyols using the inventive polymerization systems. In a third aspect, the present disclosure encompasses polycarbonate polyol compositions characterized in that the polymer chains have a high percentage of —OH end groups and a high percentage of carbonate linkages. The compositions are further characterized in that they contain polymer chains having an embedded polyfunctional moiety linked to a plurality of individual polycarbonate chains.