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Tenside composition containing gemini tensides and co-amphiphiles and production and use thereof

Inactive Publication Date: 2008-02-28
SASOL GERMANY GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0013] It is an object of the present invention to provide a composition containing gemini surfactants and auxiliaries (hereinafter termed “surfactant composition”), which will allow to utilise the known benefits of gemini surfactants in special uses in the broadest possible spectrum of applications, thus opening up a commercially interesting larger field.

Problems solved by technology

For those applications which require a high electrolyte content in aqueous solutions or emulsions / dispersions, ionic surfactants have up to now been considered to be largely unsuitable.
However, in contrast to what might be expected due to the substantial improvement in interfacial activity, no significant increase in efficiency or distinct improvement of application characteristics has been brought about by gemini surfactants as direct substitutes for conventional surfactants.
The meagre advantage of such surfactant substitution cannot justify the effort of incorporating an additional building element in the basic structure.

Method used

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  • Tenside composition containing gemini tensides and co-amphiphiles and production and use thereof
  • Tenside composition containing gemini tensides and co-amphiphiles and production and use thereof
  • Tenside composition containing gemini tensides and co-amphiphiles and production and use thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

Preparation of Pigment Emulsions in Water

Batch Size: 100 g

[0185] The gemini surfactant and the co-amphiphile were dissolved in water at 80° C. until a slightly turbid, homogeneous emulsion was obtained. After cooling of the aqueous surfactant phase to approx. 30° C., the pigment was dispersed in the aqueous phase with stirring. The emulsion then was homogenized by stirring for five minutes with an Ultra-Turrax stirrer running at max. peripheral velocity.

Componentswt % (m / m)Gemini surfactant4.25C8-C10 fatty alcohol0.75Water45.00Pigment50.00

[0186] After 24 hours at room temperature, the particle size distribution was measured.

GeminiMedian / Particle SizePigmentSurfactantDistribution (μm)Titanium dioxideA.A0.37(UV Titan M212, Kemira)A.B0.33A.C0.38A.D0.37A.E0.36Zinc oxideA.A0.37(Z-Cote HP 1, Sun Smart)A.B0.37A.C0.38A.D0.37A.E0.39Titanium dioxideB.A0.38(UV Titan M212, Kemira)B.B0.33C.A0.37C.B0.36D.A0.37D.B0.34

example 2

Preparation of Titanium Dioxide Emulsions in Oil

Batch Size: 100 g

[0187] The gemini surfactant and the co-surfactant were dissolved in oil (Miglyol 812, CONDEA Chemie GmbH) at 80° C. until a slightly turbid, homogeneous emulsion was obtained. After cooling of the surfactant phase to approx. 30° C., the pigment was admixed to the oil phase with stirring. The emulsion then was homogenized by stirring for five minutes with an Ultra-Turrax stirrer running at max. peripheral velocity.

Componentswt % (m / m)Gemini surfactant6.00Co-amphiphie, cetyl alcohol1.00Miglyol ® 81258.00UV Titan M21235.00

[0188] After 24 hours at room temperature, the particle size distribution was measured.

GeminiMedian / Particle SizePigmentSurfactantDistribution (μm)Titanium oxideA.A0.45(UV Titan M212, Kemira)A.B0.37A.C0.44A.D0.42A.E0.38B.A0.45B.B0.37C.A0.44C.D0.43D.A0.44D.D0.43

example 3

Preparation of Zinc Oxide Emulsions in Oil

Batch Size: 100 g

[0189] The gemini surfactant and the co-amphiphile were dissolved in oil (Miglyol® 812, CONDEA Chemie GmbH) at 80° C. until a slightly turbid, homogeneous emulsion was obtained. After cooling of the surfactant phase to approx. 30° C., the pigment was admixed to the oil phase with stirring. The emulsion then was homogenized by stirring for five minutes with an Ultra-Turrax stirrer running at max. peripheral velocity.

Componentswt % (m / m)Gemini surfactant4.50Co-amphiphie, cetyl alcohol0.80Miglyol 81244.70Z-Cote HP 150.00

[0190] After 24 hours at room temperature, the particle size distribution was measured.

Variant AGeminiMedian / Particle SizePigmentSurfactantDistribution (μm)Zinc oxideA.A0.41(Z-Cote HP 1, Sun Smart)A.B0.37A.C0.41A.D0.40A.E0.45B.A0.41B.D0.40C.A0.42C.B0.38D.A0.42D.B0.38

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Abstract

The subject invention relates to surfactant compositions of gemini surfactants and co-amphiphile(s), to a process for preparing such compositions, and to their uses, especially as emulsifiers and dispersants.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] This invention relates to a surfactant composition of gemini surfactants and one or more co-amphiphile(s), to a process for preparing such composition, and to its uses, especially as emulsifiers and dispersants. [0003] 2. Description of the Prior Art [0004] Mixtures of surfactants and co-amphiphiles and their use in emulsions or dispersions are well known. These mixtures have been designed for optimising the surfactant molecules pattern at the phase boundaries. When making emulsions, it is often intended to form liquid-crystalline, lamellar phases, which can be utilised to stabilise the emulsion. [0005] Proportionate mixtures of special surfactants and co-amphiphiles are employed according to their applications. For those applications which require a high electrolyte content in aqueous solutions or emulsions / dispersions, ionic surfactants have up to now been considered to be largely unsuitable. In order to improve t...

Claims

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Application Information

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IPC IPC(8): B01F3/08B01F3/12C09K3/00A61K8/30A61K8/00A61K8/04A61K8/06A61K8/27A61K8/29A61K8/33A61K8/34A61K8/36A61K8/362A61K8/368A61K8/37A61K8/40A61K8/41A61K8/42A61K8/44A61K8/46A61K8/60A61K8/64A61K8/67A61K8/72A61K8/85A61K8/96A61Q5/00A61Q5/02A61Q19/00A61Q19/10C09K23/00C11D1/00C11D1/04C11D1/10C11D1/28C11D1/34C11D1/52C11D1/90
CPCA61K8/04C11D1/528A61K8/27A61K8/29A61K8/342A61K8/345A61K8/362A61K8/375A61K8/41A61K8/42A61K8/44A61K8/466A61K8/602A61K8/85A61K8/86A61K2800/54A61K2800/596A61Q5/00A61Q5/02A61Q19/00A61Q19/10B01F17/0042B01F17/0085C01G9/02C01G23/047C09C1/043C09C1/3669A61K8/06C09K23/017C09K23/22
Inventor KWETKAT, KLAUSDAHMS, GERD
Owner SASOL GERMANY GMBH
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