Oberflächenaktive Bis-Poly(ethylenoxid)-Mittel und ihre Verwendung als Antistatika in photographischen Materialien

Optionally fluorine-substituted alkyl or alkenyl poly(ethylene oxides) the compounds of the general formulain whichR is an alkyl group with 10-20 carbon atoms, an alkenyl group with 10-20 carbon atoms or a fluoroalkyl or fluoroalkenyl group with f carbon atoms that each bear at least one fluorine atom and g carbon atoms that bear only hydrogen atoms, in which 1.5 f+g=10-20 and g may optionally be zero.R' is an alkyl group with 1 to 4 carbon atoms,L is a linking group, a linking atom or a chemical bond, andp is at least 2, q is at least 2 and p+q=from 4 to 100,may be prepared by reacting maleic anhydride with a poly(ethylene glycol) alkyl. ether and reacting the resultant intermediate product with a compound of the formula RL'H in which L' is a linking group or linking atom. Compounds of the formula (1) may also be prepared by reacting RL-substituted succinic anhydrides with a alkyl end-capped polyethylene glycol. The compounds of the formula (1) exhibit good solubility and surface activity and may be used as antistats, particularly in gelatin media, optionally in conjunction with lithium triflate or the like, in photographic coatings.