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A bleach activator, calcined technology, applied in microcapsule preparations, inorganic active ingredients, preparations for skin care, etc., can solve the problem of not being able to provide a guarantee of rapid effectiveness, unsuitable, and failing to ensure rapid and effective release of reaction components. effective methods of
Inactive Publication Date: 2015-11-25
DEB IP
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[0016] However, in the above and all other examples in the state of the art, effective means of ensuring rapid and efficient release of the reactive components are not provided, so that although effectively "protected" during storage, the assurance of rapid availability when required is not provided
For example, in U.S. Patent Publication No. 2009 / 0252815, applications such as skin lightening or acne treatment are proposed where such a "time-delayed" release may be preferred, however, where a rapid "burst" of response is desired. In the context of other applications such as skin disinfection or cleaning of hard surfaces, this property would be completely unsuitable and ineffective
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Embodiment 1
[0118] Example 1: Hydrogen Peroxide + Transition Metal Ions for Hand Cleansing Compositions (Fenton Reaction)
[0119] In one embodiment, the system provides a skin cleansing product wherein the droplets encapsulated by the adsorbent coating of the first colloidal particles comprise an aqueous solution of peroxide, acid and water, and wherein the droplets encapsulated by the adsorbent coating of the second colloidal particles The layer-encapsulated droplets contain an aqueous solution of a salt of a transition metal, an acid, and water.
[0120] The Fenton reaction involves the use of transition metal ions, such as ions of iron, gold, silver, titanium, lead, aluminum, cobalt, chromium, vanadium, manganese, or copper, to facilitate decomposition to hydroxyl radicals on hydrogen peroxide. This reaction significantly increases the rapid effectiveness of hydrogen peroxide as a bleaching, oxidizing or biocidal active because it rapidly promotes this critical decomposition step (fre...
Embodiment 2
[0125] Example 2: Metal Ion Catalyzed Bleach System for Laundry or Dishwashing Applications
[0126] The bleaching of stains on fabrics or hard surfaces in the presence of suitable ligand-bound transition metal catalysts (of which several suitable species are described in detail in US 6,306,812) is well known in the art as disclosed, for example, in US 6,306,812 In one aspect, organic bleaches such as peroxycarboxylic acids or other bleach activators can be made to perform significantly better. A well-known disadvantage of this technique, as described in US 6,306,812, is the need to ensure that the catalytic reaction takes place not at the time of initial mixing but when needed.
[0127] In one embodiment of the invention, a suitable composition of transition metals effective to protect and then deliver upon use to catalyze the bleaching of fabrics or hard surfaces comprises, according to U.S. Patent No. 6,306,812, water in a portion of a stable "dry water" mixture. A suitabl...
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Abstract
The present invention provides a multi-component encapsulated reactive formulation comprising a mixture of two or more dry powder components, where each dry powder component is formed from a phase inversion process involving vigorous mixing. The dry powder is stabilized by hydrophobic colloidal particles, which assist in generating stable “dry water” microdroplets. One dry powder component comprises hydrophobic colloidal particles encapsulating microdroplets comprising an aqueous solution of one reactant, and the at least one other dry powder component comprises hydrophobic colloidal particles encapsulating microdroplets comprising an aqueous solution of another reactant. When the encapsulated formulation is agitated such that the encapsulates are broken, the encapsulates rupture and the two aqueous solutions undergo a reaction upon contact.
Description
[0001] related application [0002] This application claims the benefit of US Provisional Patent Application Serial No. 61 / 719,158, filed October 26, 2012. field of invention [0003] The present invention provides a product comprising at least two reactants encapsulated in a droplet which in turn is encapsulated by a coating of hydrophobic colloidal particles. The two reactants remain separately encapsulated until the desired release time, at which time the reactants are released by the mechanical action of the mixed colloidal particles such that when the two types of colloidal particles are mixed and mechanically processed, the reactants are released, And thus the reactants react to form the desired product. Background of the invention [0004] In many application areas, including but not limited to laundry or hard surface cleaning, personal hygiene products, cosmetics, hair care products, oral care, paints and decorations, and animal nutrition, it is often highly desirab...
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