Patent ID: 8772408

Claim:
A method for stabilizing inorganic nanoparticles, wherein the method comprises forming an aqueous formulation comprising A) a silane-modified copolymer comprising groups of general formula (1) —Si(R 1 O) 2 R 2 (1) wherein R 1 is a C 2 - to C 8 -alkyl radical; and R 2 is (R 1 O) or a C 1 - to C 5 -alkyl radical, built up from I) a hydroxy-functional hydrophobic polymer containing as builder monomers Ia) (meth)acrylic acid esters having C 1 - to C 18 -hydrocarbon radicals in the alcohol part and/or vinylaromatics and/or vinyl esters; Ib) hydroxy-functional monomers; and IS1) silane-functional monomers capable of polymerization; and II) a hydroxy-functional hydrophilic polymer containing as builder components IIa) (meth)acrylic acid esters having C 1 - to C 18 -hydrocarbon radicals in the alcohol part and/or vinylaromatics and/or vinyl esters; IIb) hydroxy-functional monomers; and IIc) acid-functional monomers; B) inorganic particles which are optionally surface-modified, and having an average particle size (z-mean), as determined by means of dynamic light scattering in dispersion, of less than 200 nm, wherein said inorganic particles B) are inorganic nanoparticles in a colloidally disperse form in organic solvents or in water; and C) water; wherein the inorganic particles are introduced by mechanical stirring.