Production of low-emission polyurethanes
AssigneeEvonik Operations GmbH
InventorsThomas Günther, Mladen Vidakovic, Collins Wettey
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Abstract
The use of a mixture (M) comprising nitrogen compound(s) in the preparation of polyurethanes, especially polyurethane foams, wherein said mixture (M) comprises the following constituents: (a) N,N-dimethylaminopropylamine, at least in an amount of ≥5% by weight, advantageously in an amount of ≥20% by weight, preferably 20%-95% by weight, further preferably 30%-70% by weight, especially 30%-60% by weight, and (b) at least one solvent, especially water, advantageously in a total amount of ≥5% by weight, preferably ≥10% by weight, more preferably 10%-60% by weight, especially 10%-40% by weight, % by weight based in each case on the overall mixture (M), is described.
Claims14
A polyurethane prepared from an isocyanate component, a polyol component, and a mixture (M) comprising the following constituents:
- (a) N,N-dimethylaminopropylamine, in an amount of from 40% to 95% by weight, and
- (b) at least one solvent, in an amount of ≥5% by weight,
- (c) from a tertiary amine in an amount of from 15% to 60% by weight, wherein the tertiary amine is selected from the group consisting of
- 2-(dimethylamino)ethanol, 1,1′-{[3-(dimethylamino)propyl]imino}bis-2-propanol, bis(3-dimethylaminopropyl)amine, 1-[bis[3-(dimethylamino)propyl]amino]-2-propanol, 2-(diethylamino)ethanol, 1-(2-hydroxyethyl)pyrrolidine, 2-(2-(dimethylamino)ethoxy)ethanol, 2-(2-(diethylamino)ethoxy)ethanol, 2-(2-(pyrrolidin-1-yl)ethoxy)ethanol, bis(2-dimethylaminoethyl) ether, 1,1′-(oxybis(ethane-2,1-diyl))dipyrrolidine, N-(2-(dimethylamino)ethyl)-N,N′,N′-trimethylethylene-1,2-diamine, N,N,N′,N′-tetramethyl-1,6-hexanediamine, 2-((2-(dimethylamino)ethyl)(methyl)amino)ethanol, 2-((2-(2-(dimethylamino)ethoxy)ethyl)(methyl)amino)ethanol, or N-(2-(2-(dimethylamino)ethoxy)ethyl)-N-methylpropane-1,3-diamine.
Dependencies are inferred from the claim text.