Processes for producing polyurethane foams containing alkoxysilane functional polymers and uses therefor
View Patent ↗Processes comprising: (a) providing a composition comprising at least one silane-terminated polyurethane preploymer prepared by a process comprising: reacting (A) at least one polyether having a number average molecular weight (Mn) of 2000 to 8000 g/mol, and comprising 10 to 30 wt % ethylene oxide units based on all alkylene oxide units in the polyether; with (B) at least one isocyanate and alkoxysilane group-containing compound of the formula (I): wherein each of X, Y, and Z independently represents a C 1 -C 8 alkyl or a C 1 -C 8 alkoxy residue, with the proviso that at least one of X, Y, and Z represents a C 1 -C 8 alkoxy group; and wherein R is an at least bifunctional, organic residue; (b) foaming the composition, and (c) curing the foamed composition in the presence of water; and uses of polyurethane foams prepared thereby.
1. A process comprising:
(a) providing a composition comprising at least one silane-terminated polyurethane preploymer prepared by a process comprising: reacting (A) at least one polyether having a number average molecular weight (Mn) of 2000 to 8000 g/mol, and comprising 10 to 30 wt. % ethylene oxide units based on all alkylene oxide units in the polyether; with (B) at least one isocyanate and alkoxysilane group-containing compound of the formula (I):
wherein each of X, Y, and Z independently represents a C 1 -C 8 alkyl or a C 1 -C 8 alkoxy residue, with the proviso that at least one of X, Y, and Z represents a C 1 -C 8 alkoxy group; and wherein R is an at least bifunctional, organic residue, until a complete conversion of the NCO groups of the compounds of component (B) with component (A) is achieved;
(b) foaming the composition, and
(c) curing the foamed composition in the presence of water.
2. The process according to claim 1 , wherein R represents an alkylene radical having 1 to 8 carbon atoms.
3. The process according to claim 1 , further comprising applying the composition to a substrate before, during or after foaming.
4. The process according to claim 1 , wherein the at least one polyether has a number average molecular weight (Mn) of 3000 to 5000 g/mol.
5. The process according to claim 2 , wherein the at least one polyether has a number average molecular weight (Mn) of 3000 to 5000 g/mol.
6. The process according to claim 1 , wherein the at least one polyether comprises 10 to 20 wt. % ethylene oxide units and 80 to 90 wt. % polypropylene oxide units based on all alkylene oxide units in the polyether.
7. The process according to claim 2 , wherein the at least one polyether comprises 10 to 20 wt. % ethylene oxide units and 80 to 90 wt. % polypropylene oxide units based on all alkylene oxide units in the polyether.
8. The process according to claim 4 , wherein the at least one polyether comprises 10 to 20 wt. % ethylene oxide units and 80 to 90 wt. % polypropylene oxide units based on all alkylene oxide units in the polyether.
9. The process according to claim 5 , wherein the at least one polyether comprises 10 to 20 wt. % ethylene oxide units and 80 to 90 wt. % polypropylene oxide units based on all alkylene oxide units in the polyether.
10. The process according to claim 1 , wherein each of X, Y, and Z independently represents a methoxy or ethoxy group.
11. The process according to claim 2 , wherein each of X, Y, and Z independently represents a methoxy or ethoxy group.
12. The process according to claim 4 , wherein each of X, Y, and Z independently represents a methoxy or ethoxy group.
13. The process according to claim 6 , wherein each of X, Y, and Z independently represents a methoxy or ethoxy group.
14. The process according to claim 9 , wherein each of X, Y, and Z independently represents a methoxy or ethoxy group.
15. The process according to claim 1 , wherein the at least one isocyanate and alkoxysilane group-containing compound of the formula (I) comprises isocyanatopropyltrimethoxysilane or isocyanatopropyltriethoxysilane.
16. The process according to claim 2 , wherein the at least one isocyanate and alkoxysilane group-containing compound of the formula (I) comprises isocyanatopropyltrimethoxysilane or isocyanatopropyltriethoxysilane.
17. The process according to claim 4 , wherein the at least one isocyanate and alkoxysilane group-containing compound of the formula (I) comprises isocyanatopropyltrimethoxysilane or isocyanatopropyltriethoxysilane.
18. The process according to claim 6 , wherein the at least one isocyanate and alkoxysilane group-containing compound of the formula (I) comprises isocyanatopropyltrimethoxysilane or isocyanatopropyltriethoxysilane.
19. The process according to claim 14 , wherein the at least one isocyanate and alkoxysilane group-containing compound of the formula (I) comprises isocyanatopropyltrimethoxysilane or isocyanatopropyltriethoxysilane.
20. A polyurethane foam prepared by the process according to claim 1 .