Lubricant-containing aqueous preparations of copolymers

A lubricant-containing aqueous preparation of copolymers obtainable by polymerisation of

• (A) 70 to 95% by weight of a monomer mixture of
• (a) 20 to 90% by weight of an ethylenically unsaturated monocarboxylic acid or of a corresponding amide,
• (b) 10 to 80% by weight of vinylsulfonic acid, allylsulfonic acid, 3-acrylamidopropanesulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid, 3-methacrylamidopropanesulfonic acid, 2-sulfopropyl acrylate, 2-sulfopropyl methacrylate, bis(3-sulfopropyl) itaconate, 3-allyloxy-2-hydroxypropylsulfonic acid or 4-styrenesulfonic acid, and
• (c) 0 to 25% by weight of N-vinylpyrrolidone or of an N-vinyl-substituted amide of a saturated aliphatic monocarboxylic acid in the presence of
• (B) 5 to 30% by weight of a polyol whose hydroxyl groups have been esterified with a fatty acid of 8 to 26 carbon atoms, the sum totals of (A) and (B) on the one hand and (a), (b) and (c) on the other each adding up to 100%.