| 摘要 |
A method for the incorporation of an active agent into a porous structural substrate which comprises forming a pseudoplastic gel comprising: an active agent at least one solvent therefor and at least one gel forming agent and thereafter applying the gel to the structure to be treated. The penetration of the gel into the porous structure may be regulated by decreasing the viscosity of the gel by increasing the shear on the gel during its application to the porous structure. A predetermined gel penetration of the structure is achieved before 75% of the solvent has evaporated.
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