Patent ID: 8119729

Claim:
An aqueous secondary dispersion comprising a copolymer P) synthesized from I) a hydroxy-functional, hydrophobic polymer comprising monomer units derived from Ia) (meth)acrylic acid esters having C1 to C22 hydrocarbon radicals in the alcohol part, and optionally vinyl aromatics vinyl esters, or mixtures thereof, and Ib) hydroxy-functional monomers, and II) a hydroxy-functional, hydrophilic polymer comprising monomer units derived from IIa) (meth)acrylic acid esters having C1 to C22 hydrocarbon radicals in the alcohol part, and optionally vinyl aromatics, vinyl esters, or mixtures thereof, IIb) hydroxy-functional monomers, and IIc) acid-functional monomers, wherein said monomer units derived from said (meth)acrylic acid esters of Ia) and IIa) comprise monomer units B) derived from (meth)acrylic acid esters comprising an aliphatic radical with at least eight carbon atoms in the alcohol part and whose content, based on the copolymer P), is at least 12.5 wt. %.