| 摘要 |
<p>The invention relates to a polymer composition comprising 3 to 95 wt % of a copolymer H and 3 to 95 wt % of a copolymer K, wherein the copolymers H and K each have polyethermacromonomer structure units and acid monomer structure units that are each present in the copolymers H and K in a molar ratio of 1 : 20 to 1 : 1, and at least 20 mol % of all structure units of the copolymer H and at least 25 mol % of all structure units of the copolymer K are each present in the form of acid monomer structure units, the polyethermacromonomer structure units of the copolymers H and K each have at least 5 side chains comprising ether-oxygen atoms, the number of the ether-oxygen atoms per side chain of the polyethermacromonomer structure units of the copolymers H and K each vary such that the corresponding frequency distribution diagrams, in which the number of ether-oxygen atoms per side chain of a polyethermacromonomer structure unit is applied to the x-axis and the related frequencies for the copolymers H or K are applied to the y-axis, each comprise at least 2 maxima, the x-axis values of which each deviate from one another by more than 7 ether-oxygen atoms, wherein the frequency distribution diagrams of the copolymers H and K differ from one another insofar as the x-axis value of at least one maximum of the copolymer H deviates by more than 5 ether-oxygen atoms from the x-axis values of all maxima of the copolymer K and/or the arithmetically determined number of ether-oxygen atoms of the polyethermacromonomer structure units of the copolymers H and K deviate from one another by more than 5 ether-oxygen atoms.</p> |
