In situ solidifying complex coacervates and methods of making and using thereof
First Claim
1. An adhesive fluid complex coacervate comprising water, at least one polycation, at least one polyanion, and a salt that produces monovalent ions in water, wherein the salt is sodium chloride, and wherein the concentration of the monovalent ions in the adhesive fluid complex coacervate is greater than the concentration of the monovalent ions present at an application site, and wherein the polycation is synthetic polyguanidinyl polymer comprising an acrylate, methacrylate, acrylamide, or methacrylamide backbone and two or more guanidinyl groups pendant to the backbone.
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Accused Products
Abstract
Described herein are fluid complex coacervates that produce solid adhesives in situ. Oppositely charged polyelectrolytes were designed to form fluid adhesive complex coacervates at ionic strengths higher than the ionic strength of the application site, but an insoluble adhesive solid or gel at the application site. When the fluid, high ionic strength adhesive complex coacervates are introduced into the lower ionic strength application site, the fluid complex coacervate is converted to a an adhesive solid or gel as the salt concentration in the complex coacervate equilibrates to the application site salt concentration. In one embodiment, the fluid complex coacervates are designed to solidify in situ at physiological ionic strength and have numerous medical applications. In other aspects, the fluid complex coacervates can be used in aqueous environment for non-medical applications.
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Citations
42 Claims
- 1. An adhesive fluid complex coacervate comprising water, at least one polycation, at least one polyanion, and a salt that produces monovalent ions in water, wherein the salt is sodium chloride, and wherein the concentration of the monovalent ions in the adhesive fluid complex coacervate is greater than the concentration of the monovalent ions present at an application site, and wherein the polycation is synthetic polyguanidinyl polymer comprising an acrylate, methacrylate, acrylamide, or methacrylamide backbone and two or more guanidinyl groups pendant to the backbone.
- 24. An adhesive fluid complex coacervate comprising water, at least one polycation, at least one polyanion, and a salt that produces monovalent ions in water, wherein the salt is sodium chloride, and wherein the concentration of the monovalent ions in the adhesive fluid complex coacervate is greater than the concentration of the monovalent ions present at an application site, and wherein the polyanion comprises a hexametaphosphate salt.
Specification