Carboxylate from monoethylenically unsaturated monocarboxylic and dicarboxylic acids - method of making a rich copolymer, and low carboxylate degree of neutralization - rich copolymer

Monoethylenically unsaturated monocarboxylic acids and dicarboxylic acids, carboxylate having at least 20.1% by weight of the dicarboxylic acid, and at least 3000 g / mol average molecular weight M Lower carboxylate degree of neutralization obtained by the above method - rich copolymer; and methods of using such copolymers method used for the surface treatment, as well as a binder for fiber bonding. .BACKGROUND