Binder composition and nonwoven fabrics and impregnated papers using the same

摘要

A binder composition is disclosed, which comprises: (A) a copolymer emulsion which contains as its essential ingredients vinyl acetate, ethylene, and a monomer represented by the formula (1): <IMAGE> (1) wherein R1 is H or CH3; and R2 is H or an alkyl group having not more than 5 carbon atoms, the proportions of the respective ingredients being within the range of 55-96.5/3-40/0.5-5 on a weight basis; (B) a formaldehyde-free nitrogen-containing glyoxal resin; (C) a metal salt catalyst; and optionally (D) a higher alcohol sulfuric acid ester-based surfactant. Nonwoven fabrics and impregnated papers using the binder composition are also disclosed. The binder composition exhibits not only high resistance to water and solvents but also low residual free formaldehyde level, with an improvement in foamability being optionally attainable.