Patent ID: 7455909

Claim:
A binder for a nonwoven composite of non-oleophilic fibrous material comprising: a) a dispersed phase in an aqueous media of polymer from the polymerization of unsaturated monomer(s) wherein said unsaturated monomer(s) is comprised of a) at least 30 weight percent repeating units from a C1-C8 alkyl (alk)acrylate, in combination with, b) a water dispersible and/or blocked polyisocyanate component dispersed in an aqueous media, said polyisocyanate component present from 0.01 to about 20 weight percent based on the weight of the binder less the volatile portion of said aqueous media, and wherein said water dispersible polyisocyanate component comprises the reaction product of reactive isocyanate groups with a deficiency of water dispersible reactive hydroxyl terminated poly(alkyleneoxide) and wherein said blocked polyisocyanate component is characterized by an ability to regenerate two or more isocyanate groups and the blocking molecule from said blocked polyisocyanate component by heating.