The process of claim 1 wherein the non-carboxylic acid monomer is selected from alkyl esters of acrylic or methacrylic acid such as methyl, ethyl or butyl acrylate or methyl, butyl or isobutyl methacrylate, hydroxyalkyl esters of acrylic or methacrylic acids, such as hydroxyethyl or hydroxypropyl acrylate or methacrylate, acrylamide, n-alkyl acrylamides, methacrylamide, methylol acrylamide, methyl