Abstract:
The present invention relates to a spray-polyurethane system which comprises a polyol component (A) and an isocyanate component (B), where the polyol component (A) comprises a1) at least one compound reactive with isocyanate, a2) at least one reactive chain extender having at least two groups reactive toward isocyanates, where at least one group reactive toward isocyanates is a free, primary NH2 group, and also a3) at least one metal catalyst, and a4) if appropriate, further additives, where the spray-polyurethane system comprises no amine catalyst. The present invention moreover relates to a process for production of a backing layer composed of polyurethane for moldings and to the use of this backing layer for production of automobile parts. Inventive backing layers have good mechanical properties, and low emissions, and their demolding time is small when compared with the open assembly time.
Abstract:
The present invention relates to a spray-polyurethane system which comprises a polyol component (A) and an isocyanate component (B), where the polyol component (A) comprises a1) at least one compound reactive with isocyanate, a2) at least one reactive chain extender having at least two groups reactive toward isocyanates, where at least one group reactive toward isocyanates is a free, primary NH2 group, and also a3) at least one metal catalyst, and a4) if appropriate, further additives, where the spray-polyurethane system comprises no amine catalyst. The present invention moreover relates to a process for production of a backing layer composed of polyurethane for moldings and to the use of this backing layer for production of automobile parts. Inventive backing layers have good mechanical properties, and low emissions, and their demolding time is small when compared with the open assembly time.
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: NH2—X—OH (I) HO—X—Y—OH (II) HO—X—NR9—(CR7R8)n5—Y—OH (III) where X: —[(CR1R2)n1—NR3]n2—[(CR4R5)n3—NR6]n4—(CR7R8)n5— Y: —[NR6—(CR4R5)n3]n4—[NR3—(CR1R2)n1]n2— and n1, n3, n5: identical or different integers selected from the group consisting of 1, 2, 3, 4, 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, R1, R2, R4, R5, R7, R8: identical or different radicals selected from the group consisting of hydrogen, aliphatic, cycloaliphatic, araliphatic and aromatic radicals having from 1 to 20 carbon atoms, R3, R6, R9: identical or different radicals selected from the group consisting of hydrogen, aliphatic, cycloaliphatic, araliphatic and aromatic radicals having from 1 to 20 carbon atoms.
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: (I): NH2—X—OH (II): HO—X—Y—OH (III): HO—X—NR9—(CR7R8)n5—Y—OH where X: —[(CR1R2)n1—NR3]n2—[(CR4R5)n3—NR6]n4—(CR7R8)n5— Y: —[NR6—(CR4R5)n3]n4[NR3—(CR1R2)n1]n2— and n1, n3, n5: identical or different integers selected from the group consisting of 1, 2, 3, 4, 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, R1, R2, R4, R5, R7, R8: identical or different radicals selected from the group consisting of hydrogen, aliphatic, cycloaliphatic, araliphatic and aromatic radicals having from 1 to 20 carbon atoms, R3, R6, R9: identical or different radicals selected from the group consisting of hydrogen, aliphatic, cycloaliphatic, araliphatic and aromatic radicals having from 1 to 20 carbon atoms.