Use of guanidine reaction products in the production of polyurethane systems
The present invention provides specific alkoxylation products, a process for preparing them, compositions which comprise these alkoxylation products, and the use thereof.
1. A process for production of polyurethane systems by reacting at least one polyol component with at least one isocyanate component in the presence of one or more catalysts for the isocyanate-polyol and/or isocyanate-water reactions and/or the trimerization of isocyanate, wherein said reacting is carried out in the presence of one or more compounds obtainable by reacting a guanidine salt with a polyamine comprising a compound of formula (I)
H 2 N—CH 2 —CH 2 —NH—(CH 2 —CH 2 —NH) x —CH 2 —CH 2 —NH 2 (I)
where x=0 to 4.
2. The process according to claim 1 , wherein
x=1 to 3.
3. The process according to claim 1 , wherein said reacting the guanidine salt with the polyamine is carried out with a molar ratio of guanidine salts to the polyamines which is in the range from 5:1 to 1:5.
4. The process according to claim 1 , wherein the guanidine salt used is guanidine hydrochloride, guanidine sulphamate, guanidine phosphate, guanidine acetate, guanidine carbonate, guanidine sulphate, guanidine thiocyanate or guanidine nitrate.
5. The process according to claim 1 , wherein said reacting is effected in the presence of at least one compound of formula (II)
H[—(HN—CH 2 —CH 2 ) a —NH—C(═NHR + X − )] c —NH—(CH 2 —CH 2 —NH—) b H (II)
where
a=independently 0 to 6
b=independently 0 to 6
c=independently 1 to 4
R=H,
X −= anion.
6. The process according to claim 5 , wherein a is =b in the compound of formula (II), with a =b =2 to 6, while c is equal to 1 or 2, and R is =H.
7. The process according to claim 5 , wherein compounds of formula (II) comprise at least 40 wt% of compounds obtainable by reacting a guanidine salt with a compound of formula (I).
8. The process according to claim 1 , wherein the compounds obtainable by reacting a guanidine salt with the polyamine are used in a mass fraction of 0.01 to 5 parts, based on 100 parts of polyol component.
9. The process according to claim 1 , wherein the polyurethane system produced is a polyurethane foam.
10. The process according to claim 2 , wherein x is from 1 to 3.
11. The process according to claim 2 , wherein x is 1.
12. The process according to claim 2 , wherein said reacting the guanidine salt with the polyamine is carried out with a molar ratio of guanidine salts to the polyamines which is in the range from 1:1 to 1:3.
13. The process according to claim 2 , wherein said reacting the guanidine salt with the polyamine is carried out with a molar ratio of guanidine salts to the polyamines which is in the range from 2:3 to 1:3.
14. The process according to claim 5 , wherein
a=independently 3 to 5,
b=independently 3 to 5,
c=independently 1 or 2,
R=H,
and
X − = chloride.