WATER SOLUBLE RESINS AND APPLICATION THEREOF TO PAPER COATING

摘要

A water soluble resin obtainable by reacting at least two members comprising a polyamine and a urea compound, or at least four members comprising a polyamine, a urea compound, a dibasic carboxylic acid compound and a lactam, followed by reacting the reaction product with a cross-linking compound selected from epihalohydrins, .alpha. , .gamma. -dihalo- .beta. hydrins, glycidyl compounds and isocyanates; and the water soluble resin is useful for paper coating composition by being mixed with a pigment and an aqueous binder; and the paper coating composition does not generate formaldehyde and can give coated papers with various improved properties including excellent ink acceptability and water resistance.