Process for the preparation of polyether carbonate polyols
US-9382417-B2 · Jul 5, 2016 · US
Polycarbonate based polyols
US11174348B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11174348-B2 |
| Application number | US-201716327517-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 9, 2017 |
| Priority date | Nov 11, 2016 |
| Publication date | Nov 16, 2021 |
| Grant date | Nov 16, 2021 |
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Abstract
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A method of manufacturing a poly(ether-carbonate) polyol comprises a polymerization stage that includes polymerizing carbon dioxide and at least one alkylene oxide, with a starter, in the presence of a double metal cyanide polymerization catalyst and a catalyst promoter that is devoid of halide anions and cyanide. The catalyst promoter is separate from the double metal cyanide polymerization catalyst.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method of manufacturing a poly(ether-carbonate) polyol, comprising: a polymerization stage that includes polymerizing carbon dioxide and at least one alkylene oxide, with a starter, in the presence of a double metal cyanide polymerization catalyst and a catalyst promoter that is devoid of halide anions and cyanide, the catalyst promoter being separate from the double metal cyanide polymerization catalyst, wherein the catalyst promoter is selected from the group consisting of: trialkyl aluminum compounds; aluminum alkoxides; aluminum aryloxides; aluminum amides; aluminum acetylacetonate; aluminum t-butylacetylacetonate; and alkylaluminum oxides and alkoxides. 2. The method as claimed in claim 1 , wherein the starter includes at least one selected from a mono-alcohol initiator and a poly-alcohol initiator. 3. The method as claimed in claim 1 , wherein in the presence of the double metal cyanide catalyst complex and the catalyst promoter, the carbon dioxide is added intermittently or continuously during the polymerization stage to a reactor and each alkylene oxide of the at least one alkylene oxide is added intermittently or continuously during the polymerization stage to the reactor. 4. The method as claimed in claim 1 , further comprising a preliminary stage, prior to the polymerization stage, in which the double metal cyanide catalyst complex, the catalyst promoter, and the starter form a starting reaction mixture. 5. The method as claimed in claim 1 , wherein the carbon dioxide and the at least one alkylene oxide are polymerized with the starter to form the poly(ether-carbonate) polyol. 6. The method as claimed in claim 1 , wherein the poly(ether-carbonate) polyol is manufactured in a batch or semi-batch process. 7. The method as claimed in claim 1 , wherein the poly(ether-carbonate) polyol is manufactured in a continuous process.
Assignees
Inventors
Classifications
- C08G65/2663Primary
Metal cyanide catalysts, i.e. DMC's · CPC title
Cyanides · CPC title
- C08G18/44Primary
Polycarbonates · CPC title
- C08G64/34Primary
and cyclic ethers · CPC title
the ligands containing nitrogen · CPC title
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- What does patent US11174348B2 cover?
- A method of manufacturing a poly(ether-carbonate) polyol comprises a polymerization stage that includes polymerizing carbon dioxide and at least one alkylene oxide, with a starter, in the presence of a double metal cyanide polymerization catalyst and a catalyst promoter that is devoid of halide anions and cyanide. The catalyst promoter is separate from the double metal cyanide polymerization ca…
- Who is the assignee on this patent?
- Dow Global Technologies Llc
- What technology area does this patent fall under?
- Primary CPC classification C08G65/2663. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 16 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 12 related publications on this page (citations in our corpus or others sharing the same primary CPC).