Coating composition

A method for providing a coated substrate comprising:

• forming an aqueous coating composition comprising an aqueous emulsion polymer, said polymer having a glass transition temperature (Tg) from −20° C. to 80° C., formed by the free radical polymerization of at least one ethylenically unsaturated nonionic acrylic monomer and 0-7.5%, by weight based on the total weight of said polymer, ethylenically unsaturated acid monomer in the presence of 0.01-1.0%, by weight based on the total weight of said polymer, t-alkyl hydroperoxide, t-alkyl peroxide, or t-alkyl perester wherein the t-alkyl group includes at least 5 Carbon atoms and, optionally, at least one other oxidant;
• applying said aqueous coating composition to said substrate;
• and
• drying, or allowing to dry, said aqueous composition.

A method for improving scrub resistance of a coating comprising

• forming an aqueous coating composition comprising an aqueous emulsion polymer, said polymer having a glass transition temperature (Tg) from −20° C. to 80° C., formed by the free radical polymerization of at least one ethylenically unsaturated nonionic acrylic monomer and 0-7.5%, by weight based on the total weight of said polymer, ethylenically unsaturated acid monomer in the presence of 0.01-1.0%, by weight based on the total weight of said polymer, t-alkyl hydroperoxide, t-alkyl peroxide, or t-alkyl perester wherein the t-alkyl group includes at least 5 Carbon atoms and, optionally, at least one other oxidant;
• applying said aqueous coating composition to a substrate;
• and
• drying, or allowing to dry, said aqueous composition.

A method for improving the outdoor durability of a coating comprising

• forming an aqueous coating composition comprising an aqueous emulsion polymer, said polymer having a glass transition temperature (Tg) from −20° C. to 80° C., formed by the free radical polymerization of at least one ethylenically unsaturated nonionic acrylic monomer and 0-7.5%, by weight based on the total weight of said polymer, ethylenically unsaturated acid monomer in the presence of 0.01-1.0%, by weight based on the total weight of said polymer, t-alkyl hydroperoxide, t-alkyl peroxide, or t-alkyl perester wherein the t-alkyl group includes at least 5 Carbon atoms and, optionally, at least one other oxidant;
• applying said aqueous coating composition to a substrate;
• drying, or allowing to dry, said aqueous composition;
• and
• exposing said coating to outdoor conditions.

A method for improving the pick strength of a paper or paperboard coating comprising

• forming an aqueous coating composition comprising an aqueous emulsion polymer, said polymer having a glass transition temperature (Tg) from −20° C. to 80° C., formed by the free radical polymerization of at least one ethylenically unsaturated nonionic acrylic monomer and 0-7.5%, by weight based on the total weight of said polymer, ethylenically unsaturated acid monomer in the presence of 0.01-1.0%, by weight based on the total weight of said polymer, t-alkyl hydroperoxide, t-alkyl peroxide, or t-alkyl perester wherein the t-alkyl group includes at least 5 Carbon atoms and, optionally, at least one other oxidant;
• applying said aqueous coating composition to paper or paperboard;
• and
• drying, or allowing to dry, said aqueous composition.