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Delayed release delivery systems and methods

A delivery system and delayed-release technology, applied in the field of delayed-release delivery systems and methods, can solve problems such as loss of odor

Active Publication Date: 2019-06-14
ELC MANAGEMENT LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Despite many efforts in this regard, most commercial products for skin, scalp and hair initially have a strong, pleasant smell, but disappointingly tend to lose their scent within minutes of application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The delayed release delivery system of the present invention comprises a porous particle having a liquid absorbed therein.

[0018] The delayed release delivery system comprises at least one treated particle comprising a hydrophilic core particle having surface pores encapsulated with a polymer. The polymer has a hydrophobic backbone and multiple hydrophilic side groups. The polymer blocks the pores on the surface of the treated particle, with the exception that at least some of the pores on the particle surface adjacent to the hydrophilic side groups on the polymer are blocked in the presence of water and are blocked in the absence of water. Eliminate blockage. In the presence of an aqueous environment, the liquid contained in the treated particles is retained in the particles because water molecules are attracted to the hydrophilic side groups and block at least some of the surface pores adjacent to the side groups.

[0019] The treated particles retain their integr...

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PUM

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Abstract

A delayed release delivery system comprises a hydrophilic core particle having surface pores and containing a liquid. The particle is encapsulated in a polymer having a hydrophobic backbone and hydrophilic pendant groups. At least some of the surface pores adjacent the hydrophilic pendant groups are blocked in the presence of water and unblocked in the absence of water. The treated particle contains liquid in a weight ratio of the liquid to the porous core particle of at least 400:1.

Description

technical field [0001] The present invention relates to particles useful as a sustained delivery system for fragrance or skin benefit ingredients, scalp benefit ingredients and hair benefit ingredients, methods for making these particles, and compositions comprising these particles. More specifically, the particles absorb fragrances or actives and gradually release these fragrances or actives over a longer period of time. Background technique [0002] Fragrances are used in various products to enhance the enjoyment of consumers while using these products. The desire to produce such products has long been recognized: after they have been applied to the skin, scalp or hair, their fragrance lasts long. Despite many efforts in this regard, most commercial products for skin, scalp and hair initially have a strong, pleasant smell, but disappointingly tend to lose their scent within minutes of application . Attempts to solve this problem have included the use of inorganic carrie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/02A61K8/06A61Q5/00A61Q19/00
CPCA61K8/894A61K2800/624A61K8/0279A61K2800/56A61Q13/00A61K8/0241A61K8/06A61Q5/00A61Q19/00A61K2800/60A61K2800/65A61K8/062A61K8/064A61K8/068A61K8/11A61K8/892
Inventor W.A.李
Owner ELC MANAGEMENT LLC