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Delivery particle

A technology for delivering particles and beneficial agents, applied in microcapsule formulations, detergent compositions, chemical instruments and methods, etc.

Inactive Publication Date: 2011-02-23
PROCTER & GAMBLE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, in some applications, the majority of these encapsulated benefit agents leak out of the capsule, and particles that minimize or eliminate such defects are desired

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] Example 1: 50% by weight core / 50% by weight calcium carbonate wall microcapsules

[0091] A 10% dispersion of nano calcium carbonate (Omya UK, Derbyshire, UK) in tap water was prepared. The dispersion was stirred well, the solids were allowed to settle out, and the liquid portion was decanted. Repeat this step until the surface tension of the liquid phase becomes constant. Add 8 grams of benefit agent (fragrance) to 12 grams of the final dispersion and stir well to make an oil-in-water emulsion. Simultaneous titration of 20 mL of 4M calcium chloride solution (Sigma Aldrich, Milwaukee, WI) and 40 mL of 2M sodium carbonate (Sigma Aldrich, Milwaukee, WI) in the oil-in-water emulsion to prepare microcapsules, the rate of calcium chloride was about 1 mL / min, the rate of sodium carbonate was about 2 mL / min. The microcapsules are then decanted from the bulk liquid. Measure this microcapsule according to the test method of this description, and find to have following char...

Embodiment 2

[0093] Example 2: Back titration of 50 wt% core / 50 wt% calcium carbonate wall microcapsules

[0094] 6 mL of carbonate microcapsules from Example 1 were added to 4 mL of calcium chloride solution to form a suspension. The suspension was added dropwise to 20 mL of sodium carbonate. Approximately 70% of the suspension liquid was decanted, and the remaining suspension was added dropwise to 20 mL of calcium chloride solution. The bulk of the liquid was then decanted, leaving a thick suspension of microcapsules. The microcapsules were tested according to Test Method Four (4) "Leakage of Benefit Agents" of this specification and were found to have an average leakage of 0.005%.

Embodiment 3

[0095] Example 3: Interfacial Polymerization of 50 wt% Core / 50 wt% Calcium Carbonate Wall Microcapsules

[0096] 0.005 g of trimesoyl chloride was added to the 8 g of benefit agent and mixed to ensure dissolution. Microcapsules were then prepared according to the method in Example 1, said microcapsules having the following parameters: 50% by weight core / 50% by weight calcium carbonate wall.

[0097] Next, 1 g of diethylenetriamine was dissolved in 20 mL of water to form a solution. This solution was mixed with the aforementioned capsules and stirred gently. The microcapsules were tested according to Test Method Four (4) "Leakage of Benefit Agents" of this specification and were found to have an average leakage of 0.002%.

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Abstract

The present application relates to particles, compositions comprising such particles, and processes for making and using such particles and compositions. Such particles minimize or eliminate certain drawbacks of encapsulated benefit agents. When employed in compositions, for example, cleaning or fabric care compositions, such particles increase the efficiency of benefit agent delivery, there by allowing reduced amounts of benefit agents to be employed. In addition to allowing the amount of benefit agent to be reduced, such particles allow a broad range of benefit agents to be employed.

Description

field of invention [0001] This patent application relates to particles, compositions comprising such particles, and methods of making and using such particles and compositions. Background of the invention [0002] Benefit agents, such as fragrances, silicones, waxes, flavors, vitamins, and fabric softeners, are not only expensive but also generally less effective when used at high levels in personal care, cleaning, and fabric care compositions. Therefore, there is a need to maximize the efficacy of these benefit agents. One way to achieve this is to improve the delivery efficiency of such beneficial agents. Unfortunately, improving the delivery efficiency of such agents is difficult because benefit agents may be lost due to the physical or chemical properties of the agents, or such agents may be incompatible with other composition components or the area to be treated. [0003] In an attempt to improve the delivery efficiency of benefit agents, the industry has in many case...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02
CPCB01J13/02A61P31/04C11D3/505C11D17/0039
Inventor 约翰·艾伦·伯迪斯戴维·威廉·约克丹尼尔·宁·庚·刘布赖恩·文森特赫雷·卡萨诺瓦·耶佩斯
Owner PROCTER & GAMBLE CO