Patent ID: 8273405
Filing Date: 2012-09-25
Classification: A61K,A61L,A61P,A61Q,B05D,C08K,C08L,C09J

Abstract:
1. A method for improving the adhesion of a water-insoluble, water-absorbent adhesive composition, by combining, under conditions effective to form a substantially homogeneous admixture: (a) a film-forming, hydrophilic polymer (FFHP) containing a plurality of recurring polar groups, the FFHP selected from the group consisting of poly(dialkyl aminoalkyl acrylates), poly(dialkylaminoalkyl methacrylates), poly(N,N-dialkyl acrylamides), polyvinyl amine), poly(alkylene imine), poly(N-vinyl acrylamide), poly(N-vinyl alkylacrylamides), poly(trimethylammonioethyl methacrylate), poly(N-vinyl lactams), chitosan, copolymers thereof, and combinations of any of the foregoing; (b) a complementary multifunctional polymer (CMP) containing a plurality of recurring functional groups, the CMP selected from the group consisting of poly(acrylic acid), poly(methacrylic acid), poly(maleic acid), poly(sulfonic acid), poly(vinyl alcohol), poly(vinyl phenol), poly(ethylene oxide), poly(hydroxyalkyl methacrylates), cellulose derivatives, alginic acid, copolymers thereof, and combinations of any of the foregoing; wherein the CMP has a molecular weight lower than the molecular weight of the FFHP, and the FFHP and the CMP are selected such that functional groups contained in the CMP are capable of non-covalently binding to recurring polar groups in the FFHP, and where at least one of the FFHP and the CMP possesses ionogenic groups, (c) a plasticizer capable of plasticizing the FFHP, the plasticizer selected from the group consisting of dialkyl phthalates, dicycloalkyl phthalates, diaryl phthalates, mixed alkyl-aryl phthalates, alkyl phosphates, aryl phosphates, alkyl citrates, citrate esters, alkyl adipates, dialkyl tartrates, dialkyl sebacates, dialkyl succinates, alkyl glycolates, alkyl glycerolates, glycol esters, glycerol esters, and mixtures thereof, (d) a solvent in an amount effective to provide a solution, the improvement comprising: wherein the resulting adhesive composition from (iv) displays an adhesion that is enhanced over the adhesion for the same composition absent the ionizing agent.