| 摘要 |
<p>The present invention relates to the use of a polyurethane system comprising (a) polyisocyanates, (b) at least one compound that is reactive to isocyanate, (c) at least one carboxylic acid salt of an amine catalyst, containing 0.5 to 1.5 acid group equivalents of a carboxylic acid, based on an amine equivalent of the amine catalyst, (d) alternatively other catalysts, (e) alternatively a reactive chain extender with at least two groups that are reactive to isocyanates, wherein at least one group that is reactive to isocyanates is a free group, primarily an NH2 group, and (f) alternatively other additives for producing polyurethane sandwich parts. The present invention further relates to a method for producing polyurethane sandwich parts and the polyurethane sandwich parts obtained according to the method according to the invention.</p> |
