{
    "protocol": "The synthesis of hydrophilic polymers with functional groups involves using a water soluble copolyester, preferably made up of about 90 mol percent isophthalic acid, about 10 mol percent of the sodium salt of 5-sulfoisophthalic acid, and about 100 mol percent ethylene glycol. The preferred percentage ranges in the context of this synthesis are 50 to about 98 mol percent isophthalic acid, 0 to about 50 mol percent aliphatic dicarboxylic acid, and 2 to about 20 mol percent sulfomonomer. The copolyester may be created as the condensation product of a maderfogi sulfonate group attached to a dicarboxylic aromatic nucleus and an alkylene glycol with about 2 to about 11 carbon atoms. A preferred method of incorporating the binder into the solution is by maintaining it at about 1 to about 30 percent by weight in the coating solution. The binder components are mixed with surfactants including anionic surfactants such as sodium dodecyl benzenesulfonate, as well as fluorosurfactants containing fluoroaliphatic oxyethylenes. The resulting mixture should be formulated as a dispersion in water or a water-containing solvent, reaching a solids level up to about 50 weight percent and enabling the final dry coating thickness to yield between about 0.02 to 0.1 microns. Coating is preferably applied to a polymer film substrate after corona treatment and prior to stretch orientation in a process that may be in-line or off-line, ensuring adherence of the functionalized copolyester binder.The synthesis of hydrophilic polymers involves incorporating about 20 mol percent of at least one sulfomonomer that contains a sulfonate group attached to a dicarboxylic nucleus and about 100 mol percent of at least one copolymerizable glycol with 2 to 11 carbon atoms. The resulting polymer can comprise polyester with various binders present in specific weight percentages for applications like anti-fog coatings. The process may include coating a surface with an anti-fog coating containing a water-soluble hydrophilic copolyester binder and a surfactant, while ensuring the surfactant's weight percent of fluorosurfactant is less than 0.5. The final coating must have a wetting tension greater than 60 dynes/cm and be fog-free after exposure to a warm air humidifier."
}