Compositions comprising solid particles encapsulated in a cross-linked silicone matrix, and methods of making the same

A technology of cross-linking silicone and composition, applied in medical preparations containing active ingredients, skin care preparations, pharmaceutical formulations, etc.

Inactive Publication Date: 2015-05-20
ELC MANAGEMENT LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, once the pH and temperature in the surrounding environment change, dispersed or suspended particles may agglomerate with each other and precipitate out of the composition
In addition, the smaller the particle size, the greater the active surface area and the more likely such particulate components are to negatively interact or interfere with other ingredients or components in the cosmetic or topical composition, which would render the cosmetic or topical composition ineffective. Stabilize or degrade its overall performance

Method used

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  • Compositions comprising solid particles encapsulated in a cross-linked silicone matrix, and methods of making the same

Examples

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Embodiment I

[0056] TiO 2 Particles were coated first with Gantrez S-97BF polymer and then with KF9909 silicone fluid under sonication, then the coated particles were mixed with more KF9909 silicone fluid in a main beaker and processed using Caframo in Ontario, Canada. Manufactured pro mixer (Model # BDC 1850) at a digital readout of 105 and mix together until a homogeneous mixture is formed. Stannous octoate, commercially available from Arkema as Fascat® 2003 catalyst, was added to the main beaker at room temperature and mixing continued for approximately 1 minute. The resulting mixture was immediately poured onto a flat surface and allowed to stand for 30 minutes, thereby forming a crosslinked slab. The slab was then reduced to powder by mortar and pestle. The resulting treated particles have an average particle size as measured under a microscope of about 1 micron to 10 microns. Such treated particles contained approximately 85.31 wt% TiO 2 , 3.52% Gantrez S-97BF, 0.41% stannous oct...

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Abstract

The present invention relates to topical compositions containing solid particles that are stabilized via encapsulation into a cross-linked silicone matrix. The stabilized particles possess an electrical potential sufficient to prevent the particles from penetrating into the skin. The particles can readily be used either alone or in combination with other skin care actives to form topical compositions with improved stability and performance.

Description

[0001] Cross References to Related Applications [0002] This application is a continuation-in-part of Application No. US 12 / 538,455, filed August 10, 2009, which claims priority to provisional application US 61 / 093,882, filed September 3, 2008. field of invention [0003] The present invention relates to topical compositions comprising stabilized particulate components and methods of making the same. Background of the invention [0004] Cosmetic or topical compositions typically comprise one or more particulate components such as pigments or dyes, fillers, thickeners, sunscreens, and the like. Such particulate components are generally insoluble in the respective solvent or carrier system and remain dispersed or suspended in the cosmetic or topical composition. [0005] However, dispersed or suspended particles may agglomerate with each other and precipitate out of the composition upon changes in pH and temperature in the surrounding environment. In addition, the smaller ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/89A61K8/29A61K8/27A61K8/11A61Q17/04
CPCA61K8/11A61K8/27A61K8/29A61K8/8152A61K8/8164A61K8/893A61K2800/412A61K2800/622A61K2800/623A61K2800/651A61Q1/00A61Q17/04A61Q19/00
Inventor 李安俊
Owner ELC MANAGEMENT LLC
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