Carbamate solutions with bound carbon dioxide prepared from alkanolamines

US6316662A · kind A · utility

Assignee

• BASF SE

Inventors

• Peter W. K. Woo · Diepholz, DE
• Anke Schulze · Wetschen, DE
• Edmund Stadler · Hollfeld, DE
• Dieter Tintelnot · Diepholz, DE
• Udo Hadick · Lemförde, DE
• Ralf Hinrichs · Ehrenburg, DE
• Horst Hurkamp · Dinklage, DE
• Klaus Sobolewski · Diepholz, DE

Key dates

• Filing date: Nov 12, 1999
• Grant date: Nov 13, 2001
• Expiry date: Nov 12, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2410/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Carbamate solutions are obtainable by reacting at least one alkanolamine with carbon dioxide in, as solvent, at least one organic compound having a molecular weight of from 60 to 600 and containing at least one hydroxyl group, wherein the carbamate contains at least 0.51 mol of bound carbon dioxide per mole of alkanolamine and the alkanolamine has one of the following formulae: PA1 (I): NH.sub.2 --X--OH PA1 (II): HO--X--Y--OH PA1 (III): HO--X--NR.sup.9 --(CR.sup.7 R.sup.8).sub.n5 --Y--OH where PA1 X: --[(CR.sup.1 R.sup.2).sub.n1 --NR.sup.3 ].sub.n2 --[(CR.sup.4 R.sup.5).sub.n3 --NR.sup.6 ].sub.n4 --(CR.sup.7 R.sup.8).sub.n5 -- PA1 Y: --[NR.sup.6 --(CR.sup.4 R.sup.5).sub.n3 ].sub.n4 [NR.sup.3 --(CR.sup.1 R.sup.2).sub.n1 ].sub.n2 -- and PA1 n1, n3, n5: identical or different integers selected from the group consisting of 1, 2, 3, 4, PA1 n2, n4: identical or different integers selected from the group consisting of 0, 1, 2, 3, 4, 5, 6, where for each of X and Y the sum of n2 and n4 is greater than or equal to 1, PA1 R1, R2, R4, R5, R7, R8: identical or different radicals selected from the group consisting of hydrogen, aliphatic, cycloaliphatic, araliphatic and aromatic radicals having …