Patent ID: 7959822

Claim:
A magnetorheological formulation comprising a) at least one base oil which is selected from the group consisting of dialkyl dicarboxylates, based on linear or branched fatty acids having chain lengths of C 4 to C 10 and linear or branched alcohols having chain lengths of C 4 to C 10 ; saturated polyol esters, based on neopentylglycol, trimethylolpropane or pentaerythritol; poly-α-olefins and mixtures of the abovementioned dialkyl dicarboxylates and poly-α-olefins; b) at least one magnetizable particle selected from the group consisting of iron powder, finely divided iron powder, gas- and water-atomized iron powder, coated iron powder and mixtures of the abovementioned magnetizable particles; c) at least one dispersant selected from the group consisting of polyhydroxystearic acid and alkyd resin: and d) at least one thixotropic agent based on hydrophobically modified sheet silicates.