Suspensions Of Silicate Shell Microcapsules For Temperature Controlled Release
AssigneeDow Corning Corporation
InventorsLeon Andre Marteaux, Brett Lee Zimmerman
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Abstract
Aqueous suspensions of silicate shell microcapsules are disclosed having a core containing a burst aid wherein the silicate shell microcapsules are obtained by; I) mixing an oil phase containing a burst aid and an aqueous solution of a cationic surfactant to form an oil in water emulsion, II) adding a water reactive silicon compound comprising a tetraalkoxysilane to the oil in water emulsion, III) polymerizing the tetraalkoxysilane at the oil/water interface of the emulsion to form a microcapsule having a core containing the oil and a silicate shell.
Claims10
An aqueous suspension of silicate shell microcapsules having a core containing a burst aid wherein the silicate shell microcapsules are obtained by;
- I) mixing an oil phase containing a burst aid and an aqueous solution of a cationic surfactant to form an oil in water emulsion,
- II) adding a water reactive silicon compound comprising a tetraalkoxysilane to the oil in water emulsion,
- III) polymerizing the tetraalkoxysilane at the oil/water interface of the emulsion to form a microcapsule having a core containing the oil and a silicate shell.
A method for releasing an active from silicate shell microcapsules comprising:
- i) preparing silicate shell microcapsules having a core containing a burst aid,
- ii) sufficiently heating the silicate shell microcapsules to volatilize the burst aid.
Dependencies are inferred from the claim text.