| 摘要 |
<p>The present invention relates to a polymer which is preparable by reacting (a) dimer fatty acids with (b) at least one polyether of the general structural formula (I) where R is a C3 to C6 alkylene radical and n correspondingly is selected such that said polyether possesses a number-average molecular weight of 450 to 2200 g/mol, components (a) and (b) are used in a molar ratio of 0.7/2.3 to 1.3/1.7, and the resulting polymer possesses a number-average molecular weight of 1500 to 5000 g/mol and an acid number < 10 mg KOH/g. The invention further relates to a pigmented aqueous basecoat material which comprises this polymer, and to the use of said polymer in pigmented aqueous basecoat materials. It relates additionally to a method for producing multicoat paint systems, and also to the multicoat paint systems producible by means of said method. Moreover, the present invention relates to the repair of defects on multicoat paint systems.</p> |
