Polyetheramine macromonomers comprising two neighboring hydroxyl groups and their use for producing polyurethanes
View Patent ↗The object of the invention are compounds of the formula (2) wherein R 1 is H, methyl or ethyl, R 2 is C 1 - to C 4 alkyl, A is a C 2 - to C 4 alkylene group, m is number from 10 to 400, n is 1, 2, 3, 4, or 5, a method for their production and their use in the production of polyurethane prepolymers.
1. A process for producing a compound of formula 2,
in which
R 1 is H, methyl or ethyl,
R 2 is C 1 - to C 4 -alkyl,
A is a C 2 - to C 4 -alkylene group,
m is a number from 1 to 400
n is 1, 2, 3, 4 or 5,
comprising the steps of: producing an α-hydroxy-Ω-alkoxypolyalkylene glycol with a secondary hydroxyl end group by alkoxylation of R 2 —OH and subsequent propoxylation, replacing the secondary α-hydroxy group through an aminolysis by a primary amino group, and reacting the primary amino group without addition of an alkoxylation catalyst with 2 mol of alkylene oxide, to give the dihydroxyalkylamino group.
2. A process for producing a polyurethane prepolymer comprising the step of reacting at least one compound of formula 2
in which
R 1 is H, methyl or ethyl,
R 2 is C 1 - to C 4 -alkyl,
A is a C 7 - to C 4 -alkylene group,
m is a number from 1 to 400
n is 1, 2, 3, 4 or 5, with a polyisocyanate and optionally, with further polyols or polyamines.
3. A process for producing a polyurethane polymer comprising the steps of a) reacting at least one compound of formula 2
in which
R 1 is H, methyl or ethyl,
R 2 is C 1 - to C 4 -alkyl,
A is a C 2 - to C 4 -alkylene group,
m is a number from 1 to 400
n is 1, 2, 3, 4 or 5, with a polyisocyanate and optionally, with further polyols or polyamines to give a polyurethane prepolymer, and
b) reacting the resulting polyurethane prepolymer in aqueous medium with a polyamine to give a polyurethane polymer.
4. A polyurethane prepolymer prepared by a process comprising the step of reacting at least one compound of formula 2
in which
R 1 is H, methyl or ethyl,
R 2 is C 1 - to C 4 -alkyl,
A is a C 2 - to C 4 -alkylene group,
m is a number from 1 to 400
n is 1, 2, 3, 4 or 5,
with an isocyanate of the formula X(NCO) p , in which p is a number from 2 to 4 and X is an aliphatic, cycloaliphatic, aromatic or araliphatic hydrocarbon radical.
5. A process for producing a polyurethane polymer comprising the steps of reacting at least one compound of formula 2
in which
R 1 is H, methyl or ethyl,
R 2 is C 1 - to C 4 -alkyl,
A is a C 2 - to C 4 -alkylene group,
m is a number from 1 to 400
n is 1, 2, 3, 4 or 5,
with an isocyanate of the formula X(NCO) p , in which p is a number from 2 to 4 and X is an aliphatic, cycloaliphatic, aromatic or araliphatic hydrocarbon radical to form a polyurethane prepolymer, and reacting the resulting polyurethane prepolymer in an aqueous medium with a polyamine of the formula Y(NH 2 ) q , in which Y is an aliphatic, cycloaliphatic, aromatic or araliphatic hydrocarbon radical, and q is a number from 2 to 4.
6. The process as claimed in claim 1 , wherein the alkylene oxide is ethylene oxide.
7. The process as claimed in claim 1 , wherein the dihydroxyalkylamino group is a dihydroxyethylamino group.
8. A polyurethane prepolymer made in accordance with the process of claim 2 .
9. A polyurethane polymer made in accordance with the process of claim 3 .
10. A polyurethane prepolymer made in accordance with the process of claim 4 .
11. A polyurethane polymer made in accordance with the process if claim 5 .