Ion-sensitive, water-dispersible polymers, a method of making same and items using same

A wet wipe comprising:

• fibrous material;
• a binder composition for binding said fibrous material into an integral web, said binder composition comprising (a) a first polymer formed from acrylic acid;
• 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS), the sodium salt of 2-acrylamido-2-methyl-1-propanesulfonic acid (NaAMPS), or a combination thereof;
• butyl acrylate;
• and 2-ethylhexyl acrylate;
• and (b) a second polymer comprising a non-crosslinking poly(ethylene-vinyl acetate);
• and
• a wetting composition containing at least about 1 weight percent of an activating compound.

A wet wipe comprising:

• a fibrous material;
• a binder composition for binding said fibrous material into an integral web, said binder composition comprising a sulfonate anion modified acrylic acid terpolymer and a non-crosslinking poly(ethylene-vinyl acetate), wherein the binder composition is insoluble in a neutral saline solution containing at least about 1 weight percent sodium chloride;
• and wherein the binder composition is soluble in water that is substantially free of sodium ions and contains 50 ppm of calcium and magnesium ions in a 2:1 ratio;
• and
• a wetting composition containing at least about 1 weight percent of an activating compound.