DIPOLE-MODIFIED POLYURETHANE, METHOD FOR PRODUCING SAME, AND USE THEREOF IN THE PRODUCTION OF CAST ELECTROACTIVE POLYURETHANE-BASED ELASTOMER FILMS

摘要

The invention relates to a method for producing a dielectric polyurethane polymer, having the following steps: (a) generating a dipole-functionalized polyisocyanate by reacting a polyisocyanate with an NCO functionality of 2.0 with a dipole compound of the general formula (I) (Z)-(R)_n-(D)-X-(A)_m in which Z represents a functional group with at least one Zerewitinoff-active hydrogen atom, X represents an organic group with a delocalized electron system, A represents an electron acceptor functionality, selected from the group consisting of N02, -CN, -F, -Cl, -CF3,-OCF3, cyanovinyl, dicyanovinyl, or tricyanovinyl groups, D represents an electron donor functionality, selected from the group consisting of - O-, -S-, or N(B)-, B is hydrogen or a linear or branched alkyl group with 1 to 16 carbon atoms, R is an alkylene group with 1 to 16 carbon atoms, and n = 0 or 1 and m = 1, 2, 3, or 4; and (b) subsequently reacting the dipole-functionalized polyisocyanate obtained in step (a) with (aa) a polyisocyanate component and (bb) a polyol component. The invention further relates to a dielectric polyurethane polymer produced according to the method and to the use thereof.