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Low molecular weight silicone oil-in-water emulsion

An oil-in-water emulsion and low-molecular-weight technology, which is applied in the field of low-molecular-weight siloxane oil-in-water emulsions, can solve the problems of not disclosing the long-term stability of the emulsion, and not specifically disclosing the composition and preparation method of the long-term stable emulsion. To achieve the effect of improving the stability of the compound

Inactive Publication Date: 2010-05-26
DOW CORNING CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these references do not disclose any long-term stability of the reported emulsions, nor specifically disclose the composition of emulsions with long-term stability or the methods used to prepare them

Method used

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  • Low molecular weight silicone oil-in-water emulsion
  • Low molecular weight silicone oil-in-water emulsion
  • Low molecular weight silicone oil-in-water emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] D5 emulsion with SPE1 and SLES

[0100] Part A: In a small beaker, combine 8 grams of Dow 245 Fluid and 3.4g SPE 1 premixed.

[0101] Part B: In a cream jar, combine and mix 28.46g deionized water and 0.14g Standapol ES-3 (sodium lauryl ether sulfate).

[0102] Pour the contents of Part A into Part B. The mixture was sonicated in pulses with a sonication probe for 2 min. The resulting emulsion had a particle size of 239 nm. The particle size of the emulsion did not change after 20 days at 50°C. When 0.5 g of this emulsion was diluted into 10 g of water, the particle size of the resulting emulsion did not change after 7 days at room temperature. When 2 grams of aluminum chloride solution (50%) was added to 2 grams of this emulsion and shaken, the resulting composition was stable and no separation was observed.

Embodiment 2

[0103] Embodiment 2 (comparative example)

[0104] D5 Emulsion with SLES

[0105] In a cream jar, premix 31.2 g deionized water and 0.8 g Standapol ES-3 (sodium lauryl ether sulfate). Then, add 8 grams of Dow 245 fluid. The mixture was sonicated in pulses with a sonication probe for 2 min. The resulting emulsion had an initial particle size of 327 nm, but separated after 5 days at 50°C. When 2 grams of aluminum chloride solution (50%) was added to 2 grams of this emulsion and mixed, the resulting emulsion was not stable as evidenced by immediate demulsification into distinct layers.

Embodiment 3

[0106] Embodiment 3 (comparative example)

[0107] D5 Emulsion with SPE 1

[0108] Part A: In a beaker, mix 8 grams of Dow 245 Fluid and 3.4g SPE1 premixed.

[0109] Part B: In a cream jar, fill with 28.46 g of deionized water.

[0110] Pour the contents of Part A into Part B. The mixture was sonicated in pulses with a sonication probe for 2 min. The resulting emulsion had a particle size of 329 nm. An oil layer appeared on top of the emulsion after 1 day at room temperature, indicating the instability of the emulsion.

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Abstract

Oil in water emulsion compositions, and methods for preparing such emulsions, where the oil phase component of the emulsion contains at least 50 weight percent of a low molecular weight siloxane are disclosed. The oil in water emulsions are stabilized by a combination of a silicone polyether and anionic surfactant. The oil in water emulsions, and subsequently diluted emulsions therefrom, are stable with time and are useful in a variety of personal, medical, and household care formulations.

Description

[0001] Cross References to Related Applications [0002] none. technical field [0003] The present invention provides oil-in-water emulsion compositions and methods of making such emulsions, wherein the oil phase component of the emulsion contains at least 50% by weight of a low molecular weight siloxane. The oil-in-water emulsions are stabilized by a combination of silicone polyethers and anionic surfactants. The oil-in-water emulsions and subsequent emulsions diluted therefrom are stable over time and are useful in a variety of personal, medical and home care formulations. Background technique [0004] Emulsions of silicones are well known in the art and many are commercially available. However, oil-in-water emulsions of low molecular weight silicones or volatile silicones are not common due to their inherent instability. More specifically, oil-in-water emulsions in which the majority of the oil phase consists of volatile silicones are difficult to stabilize because th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K8/89A61K8/06A61Q15/00A61Q19/00A61Q5/02A61K8/02A61K8/46A61K8/58A61K8/894A61K8/898A61Q5/12A61Q17/00A61Q19/10C11D1/02C11D3/18C11D3/37
CPCA61K8/062A61K8/046A61K8/585A61K8/0208A61Q19/10C11D1/02C11D3/18A61K8/463A61Q19/00A61Q15/00A61Q5/02C11D3/3738A61K8/891A61K8/894
Inventor Q·J·冯R·S·希克森M·S·斯塔奇I·范雷特
Owner DOW CORNING CORP