Method articles and compositions of matter containing large capsules
Abstract
Abstract THIS DISCLOSURE IS DIRECTED TO A METHOD FOR FORMING ARTICLES CONTAINING LARGE (500 TO 5000 MICRONS) CAPSULES IN A FLEXIBLE MATRIX BY DEPOSITING LARGE CAPSULES UPON VARIOUS SUPPORT SUBSTRATES WHILE MINIMIZING PREMATURE CAPSULES CELL WALL RUPTURE AT THE TIME OF DEPOSITION AND PRIOR TO USE; ARTICLES OF MANUFACTURE CONTAINING THESE LARGE CAPSULES AND THIXOTROPIC COMPOSITIONS USED TO PREPARE SUCH ARTICLES. THE FORMING PROCESS EMPLOYS A THIXOTROPIC AQUEOUS MATRIX CONTAINING AN ORGANIC POLYMER GEL-FORMING, A FLEXIBLE BINDER (USUALLY A READILY WATER-SOLUBLE OR WATERDISPERSIBLE ELASTOMERIC BINDER) AND VARIOUS OPTIONAL ADJUVANT FILLERS. ACCORDING TO A PREFERRED EMBODIMENT, THE THIXOTROPIC GEL CONTAINING THE LARGE CAPSULES IS EXTRUDED ONTO A FLEXIBLE SUBSTRATE SUPPORT FOLLOWED BY DRYING.
Inventors
- 👤 Theodore Maierson
Bibliographic Details
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