Suspensions of Silicate Shell Microcapsules

Aqueous suspensions of silicate shell microcapsules having a volume fraction of microcapsules of at least 30% that are gel free at 50° C. for at least one month and processes for obtaining them are disclosed. A process for improving the stability of an aqueous suspension of silicate shell microcapsu...

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Hauptverfasser:	ZIMMERMAN BRETT, MARTEAUX LEON, GALEONE FABRIZIO S
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON DYES HUMAN NECESSITIES HYGIENE MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE MEDICAL OR VETERINARY SCIENCE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL POLISHES PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:	Aqueous suspensions of silicate shell microcapsules having a volume fraction of microcapsules of at least 30% that are gel free at 50° C. for at least one month and processes for obtaining them are disclosed. A process for improving the stability of an aqueous suspension of silicate shell microcapsules is disclosed which involves reducing non-volatile solid content of the continuous phase of the aqueous suspension of the silicate shell microcapsules to less than 0.3 weight percent. A process is also disclosed for improving the stability of an aqueous suspension of silicate shell microcapsules by adding a colloidal silicate sequestering agent to an aqueous suspension of silicate shell microcapsules and colloidal silicate particles.