Patent ID: 7034074

Claim:
An aqueous composition comprising a polymer having a diameter of <500 mn comprising a free-radical microemulsion or miniemulsion polymerization product of at least one olefinically unsaturated monomer (A) in the presence of at least one hydrophobic crosslinking agent for the (co)polymer resulting from the at least one olefinically unsaturated monomer (A) is dispersed prior to (co)polymerization in an aqueous dipersion of the crosslinking agent; wherein the aqueous composition is one of a primary dispersion and a coating material, and wherein the polymer comprises a disposed solid core-shell particle, wherein the monomer (A) comprises at least one diarylethylene of the general formula I R 1 R 2 C═CR 3 R 4 (I) wherein R 1 , R 2 , R 3 , and R 4 are each independently one of a hydrogen atom, an unsubstituted alkyl radical, an unsubstituted cycloalkyl radical, an unsubstituted alkylcycloalkyl radical, an unsubstituted cycloalkylalkyl radical, an unsubstituted aryl radical, an unsubstituted alkylaryl radical, an unsubstituted cycloalkylaryl radical, an unsubstituted arylalkyl radical, an unsubstituted arylcycloalkyl radical, a substituted alkyl radical, a substituted cycloalkyl radical, a substituted alkylcycloalkyl radical, a substituted cycloalkylalkyl radical, a substituted aryl radical, a substituted alkylaryl radical, a substituted cycloalkylaryl radical, a substituted arylalkyl radical, and a substituted arylcycloalkyl radical, with the proviso that at least two of R 1 , R 2 , R 3 , and R 4 are at least one of an unsubstituted aryl radical, an unsubstituted arylalkyl radical, an unsubstituted arylcycloalkyl radical, a substituted aryl radical, a substituted arylalkyl radical, and a substituted arylcycloalkyl radical.