Water-dispersible, cationic polymers, a method of making same and items using same
View Patent ↗The present invention is directed to triggerable, water-dispersible cationic polymers. The present invention is also directed to a method of making triggerable, water-dispersible cationic polymers and their applicability as binder compositions. The present invention is further directed to fiber-containing fabrics and webs comprising triggerable, water-dispersible binder compositions and their applicability in water-dispersible personal care products, such as wet wipes.
1. A method of making a wet wipe comprising:
forming a substrate of fibrous material;
applying to said substrate a binder composition comprising the polymerization product of a cationic quaternary ammonium monomer, at least one hydrophobic monomer and at least one hydrophilic, non-ionic monomer; and
applying to said substrate a wetting solution containing a sufficient amount of an insolubilizing agent such that said binder composition is insoluble in said wetting solution;
wherein the insolubilizing agent comprises a salt selected from the group consisting of a salt containing monovalent ions and a salt containing divalent ions.
2. The method of claim 1 , wherein said cationic quaternary ammonium monomer is selected from [2-(methacryloyloxy)ethyl] trimethyl ammonium chloride, [2-(acryloyloxy)ethyl] trimethyl ammonium chloride, (3-acrylamidopropyl) trimethyl ammonium chloride and N,N-diallyldimethylammonium chloride.
3. The method of claim 1 , wherein said at least one hydrophobic monomer is selected from alkyl acrylates and alkyl methacrylates.
4. The method of claim 1 , wherein said at least one hydrophobic monomer is selected from methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, 2-ethylhexyl methacrylate, and combinations thereof.
5. The method of claim 1 , wherein said hydrophilic, non-ionic monomer is selected from acrylamide, methacrylamide, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, hydroxypropyl acrylate, hydroxypropyl methacrylate, hydroxybutyl acrylate, hydroxybutyl methacrylate, N,N-dimethyl acrylamide, N-ethyl acrylamide, N-vinylformamide, N-vinyl-2-pyrrolidone and combinations thereof.
6. The method of claim 1 , wherein said binder composition comprises the polymerization product of approximately 3-10 mole percent [2-(methacryloyloxy)ethyl] trimethyl ammonium chloride, approximately 37-80 mole percent butyl acrylate and approximately 10-60 mole percent 2-hydroxyethyl methacrylate.