A method of preparing an aqueous dispersion of acrylate-siloxane copolymer particles comprising the steps of: 1) adding a first portion of an aqueous monomer emulsion into a vessel containing water and an anionic surfactant, wherein the contents of the vessel are stirred and controlled at a temperature in the range of from 60 °C to 95 °C; 2) adding a first portion of an initiator to the vessel to form, over time, an aqueous dispersion of seed copolymer particles; then 3) adding a second portion of the monomer emulsion and a second portion of the initiator to the vessel; then 4) maintaining the temperature of the contents of the vessel in the range of from 60 °C to 95 °C for a sufficient time to achieve substantially complete conversion of monomers in the monomer emulsion to polymer particles comprising structural units of the monomers; wherein the monomer emulsion has an average monomer droplet size in the range of from 1 μm to 30 μm determined by the method mentioned in the specification and comprises, based on the weight of monomers, a) from 40 to 98.8 weight percent of an acrylate monomer; b) from 0.1 to 5 weight percent of an acid monomer; from c) from 1 to 59.8 weight percent of a siloxane acrylate monomer; from 0.5 to 5 weight percent of the nonionic surfactant; and from 0.5 to 5 weight percent of the anionic surfactant; wherein the siloxane acrylate monomer is represented by formula I: where R is H or CH 3; R 1 is H or CH 3; each R 2 is independently CH 3 or O-Si(CH 3) 3; Y is -CH 2 - or -CH 2 CH 2 -; and x is 0 or 1; with the proviso that when x is 1, R 1 is H; when Y is -CH 2 -, R 1 is H; and when Y is - CH 2 CH 2 -, R 1 is CH 3 and x is 0; wherein the nonionic surfactant is represented by formula II: where n is from 0 to 10; p is from 2 to 30, with the proviso that p ≥ n; and R 3 is a linear or branched C 3 -C 16 -alkyl group; and wherein the anionic surfactant is represented by formula III: where R 4 is C 6 -C 20 -alkyl; m is from 0 to 10; and M is Li, Na, or K. 1) adding a first portion of an aqueous monomer emulsion into a vessel containing water and an anionic surfactant, wherein the contents of the vessel are stirred and controlled at a temperature in the range of from 60 °C to 95 °C; 2) adding a first portion of an initiator to the vessel to form, over time, an aqueous dispersion of seed copolymer particles; then 3) adding a second portion of the monomer emulsion and a second portion of the initiator to the vessel; then 4) maintaining the temperature of the contents of the vessel in the range of from 60 °C to 95 °C for a sufficient time to achieve substantially complete conversion of monomers in the monomer emulsion to polymer particles comprising structural units of the monomers; wherein the monomer emulsion has an average monomer droplet size in the range of from 1 μm to 30 μm determined by the method mentioned in the specification and comprises, based on the weight of monomers, a) from 40 to 98.8 weight percent of an acrylate monomer; b) from 0.1 to 5 weight percent of an acid monomer; from c) from 1 to 59.8 weight percent of a siloxane acrylate monomer; from 0.5 to 5 weight percent of the nonionic surfactant; and from 0.5 to 5 weight percent of the anionic surfactant; wherein the siloxane acrylate monomer is represented by formula I: where R is H or CH 3; R 1 is H or CH 3; each R 2 is independently CH 3 or O-Si(CH 3) 3; Y is -CH 2 - or -CH 2 CH 2 -; and x is 0 or 1; with the proviso that when x is 1, R 1 is H; when Y is -CH 2 -, R 1 is H; and when Y is - CH 2 CH 2 -, R 1 is CH 3 and x is 0; wherein the nonionic surfactant is represented by formula II: where n is from 0 to 10; p is from 2 to 30, with the proviso that p ≥ n; and R 3 is a linear or branched C 3 -C 16 -alkyl group; and wherein the anionic surfactant is represented by formula III: where R 4 is C 6 -C 20 -alkyl; m is from 0 to 10; and M is Li, Na, or K.