Preservation and strengthening of porous solids
Abstract
Abstract A POROUS SOLID IS PRESERVED AND STRENGTHENED BY SEQUENTIALLY IMPREGNATING INTO SAID SOLID, A PLURALITY OF SOLVENT MIXTURES, WHEREIN EACH OF THE SEQUENTIALLY IMPREGNATED MIXTURES CONTAINS A HIGHER CONCENTRATION OF CURABLE POLYMERIC MATERIAL THAN THE PREVIOUSLY IMPREGNATED MIXTURES. THE ADJACENT, SEQUENTIALLY IMPREGNATED MIXTURES ARE ALLOWED TO REMAIN IN CONTACT, WITHIN THE POROUS SOLID, SO AS TO PERMIT DIFFUSION OF THE POLYMERIC MATERIAL THEREBETWEEN, AND TO MINIMIZE THE PRESENCE OF DISTINCT CONCENTRATION BOUNDARIES. UPON CURING, THE RESIN FORMS AN IMPREGNATE OF CONTINUOUSLY INCREASING CONCENTRATION FROM THE INNERMOST PORTION OF THE IMPREGNATED SOLID TO THE SURFACE OF THE SOLID, IN ONE EMBODIMENTT, THE FIRST OF SAID SEQUENTIALLY APPLIED MIXTURES MAY BE A SOLVENT TREATMENT PROCEDURE, WITH A WATER-MISCIBLE SOLVENT, OR, MORE PREFERABLY, WITH A PLURALITY OF SEQUENTIALLY IMPREGNATED MIXTURES OF WATER AND SOLVENT OF INCREASING SOLVENT CONCENTRATION, WHEREIN THE FINAL SOLVENT IMPREGNATE IS AN ANYDROUS WATER-MISCIBLE SOLVENT.
Inventors
- 👤 Lal Gauri Kharaiti
Bibliographic Details
Claims Analysis
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