. . . . . . . "Any ethylenically unsaturated monomer which is different from the other monomers in the polymeric latex can be used to prepare the copolymer, including alkyl acrylates and methacrylates, such as methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, butyl methacrylate and the like; vinyl esters, amides, nitriles, ketones, halides, ethers, olefins, diolefins and the like are exemplified" . .