Use of urethane or
urea group containing polyether compound as a compatibility agent for a
polyol composition containing at least two immiscible polyols, is claimed, where the polyether is obtained by reacting at least a di- and / or polyisocyanate (a) with at least a hydrophilic polyether and at least a hydrophobic polyether (b) (both statistically containing at least one hydroxyl,
amide and / or
imine function), and optionally further compound (c) containing at least one hydroxyl,
amide and / or
imine function and / or another
isocyanate reactive group and
carboxylic acid or
epoxide function. Use of urethane or
urea group containing polyether compound as a compatibility agent for a
polyol composition containing at least two immiscible polyols, is claimed, where: the polyether is obtained by reacting at least a di- and / or polyisocyanate (a) with at least a hydrophilic polyether statistically containing at least one hydroxyl,
amide and / or
imine function, at least a hydrophobic polyether (b) statistically containing at least one hydroxyl, amide and / or imine function, and optionally further compound (c) containing at least one hydroxyl, amide and / or imine function and / or another
isocyanate reactive group and
carboxylic acid or
epoxide function; and (a) is difunctional or polyfunctional. Independent claims are included for: (1) a
polyol mixture comprising the compatibility agent and further auxiliary material and additives; (2) a reactive mixture comprising a homogeneous polyol mixture and optionally further auxiliary material and additives, and one or more isocyanates; and (3) the urethane or
urea group containing polyether compound.