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Silicone emulsion, method of preparing same, and cosmetic ingredient

A technology for silicone emulsion and cosmetics, applied in the field of preparing the silicone emulsion, can solve the problems of high cost, emulsion degradation, difficulty in selective removal and the like, and achieve the effect of high stability

Active Publication Date: 2008-03-12
DOW SILICONES CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, selective removal of residual cyclic organosiloxanes can be difficult and costly
Additionally, methods of removing cyclic organosiloxane oligomers, such as pervaporation, may lead to emulsion degradation

Method used

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  • Silicone emulsion, method of preparing same, and cosmetic ingredient
  • Silicone emulsion, method of preparing same, and cosmetic ingredient
  • Silicone emulsion, method of preparing same, and cosmetic ingredient

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0079] The following examples are provided to better illustrate the silicone emulsion and method of the present invention, but should not be considered as limiting the present invention described in the appended claims. Unless otherwise stated, all parts and percentages reported in the examples are by weight. In addition, D 4 It is an abbreviation for octamethylcyclotetrasiloxane. The following methods and materials are used in the examples:

Molecular weight and %D 4 Determination of

[0080] A neutralized aliquot (0.1 g) from the polymerization reaction was placed in a 1 ounce glass vial. Ethylene glycol (10 g, histological grade) and 10 g toluene (99.8%, HPLC grade) were added to the bottle, and the contents were mixed thoroughly with a laboratory vortex mixer for 45-60 seconds. Then, the mixture was centrifuged at 2600 rpm for 20 minutes using an International Equipment Company HN-S centrifuge. The toluene phase is then collected for gel permeation chromatography.

[0081] The...

Embodiment 1

[0089] Except that sodium methyl coco-taurate is used instead of SDS and the hydroxyl-terminated polydimethylsiloxane with a weight average molecular weight of 5060 is used instead of the hydroxyl-terminated polydimethylsiloxane with a weight average molecular weight of 4560, According to the method of Comparative Example 1, a silicone emulsion was prepared at 25°C. The emulsified mixture has a median particle size of 301 nm. The analysis results are shown in Table 2.

Table 2

25℃

[0091] Figure 1 shows the %D of the silicone emulsions of Comparative Example 1, Comparative Example 2 and Example 1 prepared at 25°C 4 Graph of relative weight average molecular weight. In Figure 1, the abbreviations SDS, SMCT and STC represent sodium lauryl sulfate, sodium methyl cocotaurate and sodium taurocholate, respectively.

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PUM

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Abstract

A silicone emulsion comprising a polyorganosiloxane, a cholic acid derivative, and water, wherein the emulsion contains not greater than 10% (w / w) of cyclic organosiloxane tetramer; a method of preparing the emulsion; and a cosmetic composition containing the emulsion.

Description

[0001] Cross-references to related applications [0001] This application is based on Section 119(e) of 35 U.S.C., and claims the rights and interests of U.S. Provisional Patent Application No. 60 / 662731 filed on March 17, 2005. Therefore, U.S. Provisional Patent Application No. 60 / 662731 is incorporated herein by reference. Technical field [0002] The present invention relates to silicone emulsions, and more specifically to silicone emulsions containing polyorganosiloxane, cholic acid derivatives and water, wherein the polyorganosiloxane contains no more than 10% (w / w) ring Shape organosiloxane tetramer. The present invention also relates to a method for preparing the silicone emulsion and to cosmetic ingredients containing the emulsion. Background technique [0003] Silicone emulsions containing various surfactants are generally prepared by suspension polymerization or emulsion polymerization. However, the emulsions generally contain appreciable concentrations of volatile cyclic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04A61K8/46C08K5/42A61K8/891C08K5/12A61Q5/00C08J3/03A61Q19/00A61K8/06
CPCC08K5/101C08J3/03A61K8/892C08J2383/04A61Q19/00A61K8/63A61K8/06C08L83/04A61K8/891
Inventor E·J·乔夫里
Owner DOW SILICONES CORP