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Storage of pulverulent substances having a high water content

A powdery, substance-based technology, applied in body powders, pharmaceutical formulations, skin care preparations, etc., can solve the problem of no obvious improvement in storage stability

Inactive Publication Date: 2010-01-13
EVONIK DEGUSSA GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this approach also does not significantly improve storage stability

Method used

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  • Storage of pulverulent substances having a high water content
  • Storage of pulverulent substances having a high water content
  • Storage of pulverulent substances having a high water content

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0148] Examples 1-6: Cosmetic products

[0149] 88.92 g of deionized water and 5.0 g of propylene glycol (Caelo) were placed in a beaker, 0.8 g of LCW Covagel (LCW Sensient) was added with stirring with a magnetic stirrer, and the mixture was stirred at room temperature for an additional 15 minutes. Pour the clear solution into a suitable 500-ml stainless steel beaker, add 5.0 g of hydrophobic silica powder or a mixture of hydrophobic silica powder and hydrophobic metal oxide powder, and use a high-speed mixer ( VMA-Getzman, disc diameter 5 cm) mix the ingredients at 10,000 rpm for 60 seconds. The resulting product was then filled into 250-ml bottles made of glass or polyethylene with a screw top and stored at room temperature in airtight containers for 3 months. After 3 months, the articles were evaluated visually according to the criteria listed in Table 1. Table 2 shows the results of visual evaluation.

Embodiment 7～11

[0150] Examples 7-11: cleaning agent / detergent

[0151] In a 500-ml stainless steel beaker, use a high-speed mixer ( VMA-Getzman, disc diameter 5 cm) 93.0 g of 10% hydrogen peroxide solution (commercially stabilized) was mixed with 7.0 g of hydrophobic silica powder at 10,000 rpm. The resulting product is filled into 250-ml bottles made of glass or polyethylene with a screw top and stored at room temperature in airtight containers for 3 months. After 3 months, the articles were evaluated visually according to the criteria listed in Table 1. Table 3 shows the results of visual evaluation.

[0152] The examples show that the storage stability of the powdered preparation is significantly improved when it is brought into contact with the hydrophobic surface of the container.

[0153] Table 1: Storage Stability Evaluation

[0154] A

No change, i.e. no water separation

B

A few drops of liquid appear on the lid, bottom, and / or walls of the container ...

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PUM

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Abstract

The invention provides a method of releasing water from powder product, which includes cosmetic, detergent, and abstergent. Wherein, the powder product contains not least than 50 wt% water and hydrophobic silicon dioxide powder, and characters in that the powder product connects to hydrophobic materials in storage process.

Description

technical field [0001] The present invention relates to a storage method for pulverulent substances with a high water content. Background technique [0002] "Dry water" is a powdered solid having a water content greater than 95%. It is formed by intimate mixing of water and hydrophobic fumed silica. During this process, the water droplets are surrounded by solid particles and are prevented from flowing together again. The first experiments with "dry water" as a cosmetic substrate started in the 1960s (DE-A-1467023, US 3393155, microparticle serial number 11, Degussa AG). In the late 1990s, this concept was reformulated by Japanese cosmetic companies and further developed (EP-A-855177, EP-A-1206928, EP-A-1235554). However, so far, only a few cosmetic products are commercially available. [0003] "Dry water" was prepared by thoroughly mixing hydrophobic fumed silica with water. During this process, water droplets generated during mixing are encapsulated by the water-non-w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K8/26A61K8/04A61K8/22A61Q1/12A61Q19/10
Inventor M·德雷克斯勒A·格雷S·哈森查尔S·里德
Owner EVONIK DEGUSSA GMBH