NEW GREASES FOR LEATHER AND THEIR USE (II)

摘要

Water-dispersible and/or water-emulsifiable urethane oligomers haing a fatty character (UR fatty oligomers) contain hydrocarbon fatty residues, the oligomer molecule having an at least mostly non-cross-linked base structure, together with acid groups capable of building salts. These oligomers are used as amphiphilic agents for greasing and if desired retanning leathers and pelts. Also disclosed are aqueous dispersions of said amphiphilic UR fatty oligomers designed as water-dilutable, aqueous pasty masses. These dispersions may also contain emulsifiers and if desired other greasing or water-proofing agents known per se for leathers and pelts, mixed with the UR fatty oligomers.