Patent ID: 6511650
Filing Date: 2003-01-28
Classification: A61L,C08J,C12N

Abstract:
A method for preparing a hydrogel material having macroporous open pore porosity, which comprises:a) providing a solution of a hydrogel-forming material, a surfactant and, optionally, a gas-generating component, which solution is capable of being mixed in the presence of a gas to incorporate the gas in the solution and form a stable foam; b) forming a stable foam by mixing the solution in the presence of a gas and/or, if the gas-generating component is present, by subjecting the solution to conditions or agents which result in generation of gas from the gas-generating component; c) exposing the stable foam to conditions and/or agents which result in gelling of the hydrogel-forming material to form a hydrogel containing gas bubbles therein; d) releasing the gas bubbles from the hydrogel to form a hydrogel material having macroporous open pore porosity.