Some Nonlinear Problems in Riemanian Geometry

Methods of controlling the migration of resin dispersions such as resin binders in the manufacture of porous materials such as bonded nonwoven fabrics comprising the use of a resin dispersion or resin binder composition comprising: (1) a metal ammine complex coordination compound; (2) a synthetic resin; and (3) a surfactant, at least one of the resin and surfactant components containing specific coordinating ligands capable of being affected by ions of said metals to control the total migration of the resin binder during its deposition.