Long-chain polyether polyols with a high proportion of primary oh groups
AssigneeBayer Aktiengesellschaft
InventorsJörg Hofmann, Pramod Gupta, Manfred Dietrich
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Abstract
The invention relates to long-chain polyether polyols having a content of primary OH groups of 40 to 95 mol-% and a total content of oxyethylene units of >25 wt. % as well as a process for their production by DMC-catalysed polyaddition of an ethylene oxide (EO)/propylene oxide (PO) mixture in the weight ratio of 40:60 to 95:5 as an end block to starter compounds having active hydrogen atoms.
Claims20
A polyether polyol having a primary OH content of
- from about 40 to about 95 mol-%, based on the amount of OH groups in the polyether polyol, with an oxyethylene unit content of at least 25 wt. %, based on the total weight of the polyether polyol,
- wherein the polyether polyol contains an ethylene oxide/propylene oxide end block produced in the presence of a double-metal cyanide catalyst.
A process for producing polyether polyols having from about 40 to about 95 mol-%, based on the amount of OH groups in the polyether polyol, of primary OH groups comprising:
- reacting starter compounds having active hydrogen atoms with an ethylene oxide/propylene oxide mixture in the presence of a double-metal cyanide catalyst, wherein the ethylene oxide and propylene oxide are present in the ethylene oxide/propylene oxide mixture in a ratio of from 40:60 to 95:5, by weight.
A polyether polyol having a primary OH content of from about 40 to about 95 mol-%, based on the amount of OH groups in the polyether polyol, with an oxyethylene unit content of at least 30 wt. %, based on the total weight of the polyether polyol,
- wherein the polyether polyol contains an ethylene oxide/propylene oxide end block produced in the presence of a double-metal cyanide catalyst.
A polyether polyol having a primary OH content of from about 40 to about 95 mol-%, based on the amount of OH groups in the polyether polyol, with an oxyethylene unit content of at least 35 wt. %, based on the total weight of the polyether polyol,
- wherein the polyether polyol contains an ethylene oxide/propylene oxide end block produced in the presence of a double-metal cyanide catalyst.
Dependencies are inferred from the claim text.