Processes for preparing a mixture that contains a polyoxyalkylene polyol
AssigneeCovestro Deutschland AG
InventorsKlaus Lorenz, Ingo Danek
Life of this patent
Estimating the term…
Abstract
The invention relates to processes for preparing a mixture that contains a polyoxyalkylene polyol, preferably a polyether polyol, to the mixtures obtainable by the process and to a mixture that contains a polyoxyalkylene polyol, preferably a polyether polyol and an alkoxylated oxoacid of phosphorus.
Claims19
A process for producing a mixture comprising a polyoxyalkylene polyol, comprising:
- i. providing a component A) comprising a polyoxyalkylene polyol A1) having a calculated hydroxyl number (OHNA1) of 600 to 1060 mg KOH/g by
- a) reacting an H-functional starter compound (B) with an alkylene oxide (C) using a component (D), where component (D) contains a Brønsted acid, to form an intermediate (E);
- b) adding an amine (F) to the intermediate (E) obtained in i-a), to form component (A);
- ii. subsequently reacting component (A) with an alkylene oxide (G) in the presence of a DMC catalyst (H) to give the mixture comprising the polyoxyalkylene polyol;
- wherein the reaction in step i.-a) is effected in the absence of a superacid, and
- wherein the calculated amount of Brønsted acid added in step i.-a) is 0.5% by weight-5.0% by weight, based on the total mass of the intermediate (E).
The process as claimed in claim 6, wherein the tertiary amine has a hydroxyl number of 300 mg KOH/g to 1200 mg.
A component (A) comprising a polyoxyalkylene polyol A1) having a calculated hydroxyl number (OHNA1) of 600 to 1060 mg KOH and an alkoxylated oxygen acid of phosphorus, wherein the calculated phosphorus content of 0.16% to 2.35% by weight is based on component (A).
A mixture comprising a polyoxyalkylene polyol having an equivalent mass of 93 to 225 g/mol and an alkoxylated oxygen acid of phosphorus, where the calculated phosphorus content is from 0.065% to 1.287% by weight, based on the mixture.
Dependencies are inferred from the claim text.