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Encapsulates

a technology of encapsulates and encapsulates, applied in the field of encapsulates, can solve the problems of not providing the required protection and/or release profile of benefit agents, materials cannot be encapsulated by traditional methods, and the benefit agents may be degraded by or degrade components of such products

Inactive Publication Date: 2014-11-20
PROCTER & GAMBLE INTERNATIONAL OPERATIONS SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a process to make encapsulated benefit agents, which are particles that can be used in a variety of products to provide protection and release benefits. The process is simple and can be used to produce particles that meet different needs. The technical effect of this patent is to provide a simple way to create particles that offer desired protection and release benefits, which can be used in various products.

Problems solved by technology

Unfortunately, in certain products, for example, fluid products, benefit agents may be degraded by or degrade components of such products before such product is used.
Efforts have been made in this area but typically fail to provide the required level of protection and / or benefit agent release profile.
Thus, such materials cannot be encapsulated by traditional methods.
Such attempts met with limited success as the resulting encapsulated benefit agents were not symmetric, mono-disperse and / or did not have a uniform core shell architecture.
Applicants recognized that the source of such problems was unfavorable momentum and mass transfer through the nozzle.

Method used

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examples

[0133]While particular embodiments of the present invention have been illustrated and described, it would be obvious to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.

examples 1-5

Production of Spray Dried Core-Shell Encapsulates

[0134]A polymeric shell material solution is prepared by slowly adding 7.5 grams of poly(vinyl alcohol) (360627, Sigma-Aldrich 80% degree of hydrolysis, Mw 9,000-10,000) to 46.25 grams of deionized water while mixing with a magnetic stirrer at 20° C. Once the poly(vinyl alcohol) is completely dissolved, 46.25 grams of ethanol (≧99%, Sigma-Aldrich) are slowly added under continuous stirring at 20° C. This solution is subsequently filtered with a 5 micrometers Syringe-driven filter (Millex-SV 5.00 μm, Millipore, Ireland). As core, 100 grams of 245 Fluid (99% decamethylcyclopentasiloxane, Dow Corning®) having a viscosity of 4 cPs (measured at a shear rate of 14s−1 and at a temperature of 25° C.) is filtered with a 5 micrometers Syringe-driven filter. The polymeric shell material solution and the core are introduced into the spray dryer (4M8-TriX Spray dryer, ProCepT, Belgium), separately, by using two high pressure syringe pumps (PHD 440...

example 6

Production of Spray Dried Core-Shell Encapsulates

[0135]A polymeric shell material solution is prepared by slowly adding 7.5 grams of poly(vinyl alcohol) G-Polymer® (Nippon Gohsei, Japan) to 46.25 grams of deionized water while mixing with a magnetic stirrer at 20° C. Once the poly(vinyl alcohol) is completely dissolved, 46.25 grams of ethanol (≧99%, Sigma-Aldrich) are slowly added under continuous stiffing at 20° C. This solution is subsequently filtered with a 5 micrometers Syringe-driven filter (Millex-SV 5.00 μm, Millipore, Ireland). As core, 10 grams of poly(vinyl alcohol) (360627, Sigma-Aldrich 80% degree of hydrolysis, Mw 9,000-10,000) are slowly added in 70 grams of deionized water. Once the poly(vinyl alcohol) is dissolved, while stiffing, 20 grams of Liquitint Violet DD (Milliken, USA) are slowly added at 20° C. The viscosity of this second solution is measured (as described in method 5) being of 80 cPs. The solutions are introduced into the spray dryer (4M8-TriX Spray drye...

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Abstract

The present application relates processes that can be used to produce encapsulated benefit agents comprising a core and a shell that encapsulates said core, encapsulated benefit agents produced by such process and products comprising such encapsulated benefit agents as well as methods of making and using such products. Such process can be used to produce particles that offer the desired protection and release benefits when used in a variety of products.

Description

FIELD OF INVENTION[0001]The present application relates processes that can be used to produce encapsulated benefit agents comprising a core and a shell that encapsulates said core, encapsulated benefit agents produced by such process and products comprising such encapsulated benefit agents as well as methods of making and using such products.BACKGROUND OF THE INVENTION[0002]Products, for example, consumer products may comprise one or more benefit agents that can provide a desired benefit to such product and / or a situs that is contacted with such a product—for example hueing and / or suds suppression. Unfortunately, in certain products, for example, fluid products, benefit agents may be degraded by or degrade components of such products before such product is used. Thus, a protection system that protects the components of a product from a benefit agent and provides the desired level of benefit agent at the desired time was needed. Efforts have been made in this area but typically fail ...

Claims

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Application Information

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IPC IPC(8): C11D17/00
CPCC11D17/0039A61K8/11A61K8/66A61K8/8129A61K8/8152A61K8/891A61K2800/412A61K2800/43A61K2800/434A61K2800/56A61K2800/624A61Q13/00B01J13/043C09B23/148C09B67/0097C11D3/373C11D3/3734C11D3/3738C11D3/3742C11D3/38672C11D3/40C11D3/42C11D3/505C11D11/02C12Y302/01C12Y302/01004C12Y304/00C11D3/3753C11D3/3757
Inventor SMETS, JOHANFERNANDEZ PRIETO, SUSANARODRIGO GOMEZ, RAULGASULL MORALES, ALBERTQUANSAH, JENNIFER EFUA KWANSIMA
Owner PROCTER & GAMBLE INTERNATIONAL OPERATIONS SA
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