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Oil-in-water emulsion and method

A technology of oil-in-water emulsion and emulsion, which can be used in pharmaceutical formulations, coatings, cosmetics, etc., and can solve problems such as difficulty in controlling the average particle size

Inactive Publication Date: 2018-07-31
DOW (SHANGHAI) HOLDING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even in the case of emulsion polymerization, it is difficult to control the average particle size

Method used

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  • Oil-in-water emulsion and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0159] Table 1 below identifies the components and relative amounts used in the oil-in-water emulsion formed based on the above procedure. The amounts are based on the total weight of the oil-in-water emulsion.

[0160] Table 1

[0161] components

weight%

organopolysiloxane

40.0

organic oil 1

7.1

basic compound

6.3

Surfactant 1

2.6

Organic Acid Catalyst Precursor

9.6

water

34.4

[0162] Organopolysiloxanes are hydroxyl-terminated polydimethylsiloxanes having a molecular weight of 5,000 g / mol to 9,000 g / mol.

[0163] Organic oil 1 is mineral oil.

[0164] The basic compound is triethanolamine.

[0165] Surfactant 1 is an alkylbenzenesulfonic acid.

[0166] The organic acid catalyst was an alkylbenzenesulfonic acid which was acidified once via an organic acid catalyst precursor which was sulfuric acid (10%).

[0167] The average particle size of the oil-in-water emulsion was 0.14 microns. The a...

Embodiment 2

[0169] Table 2 below identifies the components and relative amounts used in the oil-in-water emulsion formed based on the above procedure. The amounts are based on the total weight of the oil-in-water emulsion.

[0170] Table 2 :

[0171] components

weight%

organopolysiloxane

55.0

organic oil 2

5

Surfactant 1 / organic acid catalyst

1.2

basic compound

0.65

water

38.15

[0172] Surfactant 1 is the same as the organic acid catalyst and is an alkylbenzenesulfonic acid.

[0173] Organic Oil 2 is hydrogenated polydecene, which is available under the trade name 366NF is commercially available from INEOS USA LLC (League City, TX).

[0174] After 21 hours of polymerization, the average particle size of the oil-in-water emulsion was 0.68 microns as measured via a MasterSizer 2000 (commercially available from Malvern Instruments Ltd. (Malvern, UK)).

Embodiment 3

[0176] Table 3 below identifies the components and relative amounts used in the oil-in-water emulsion formed based on the above procedure. The amounts are based on the total weight of the oil-in-water emulsion.

[0177] table 3 :

[0178] components

weight%

organopolysiloxane

55.0

organic oil 3

5

Surfactant 1 / organic acid catalyst

1.2

basic compound

0.65

water

38.15

[0179] Organic oil 3 is olive oil.

[0180] After 21 hours of polymerization, the average particle size of the oil-in-water emulsion was 1.2 microns as measured via the MasterSizer 2000.

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Abstract

A method of preparing an oil-in-water emulsion comprises combining (A) an organopolysiloxane including at least two silicon-bonded hydrolysable or hydroxyl groups and (B) an organic oil to give a mixture. The method further comprises combining the mixture, (C) an aqueous medium and (D) a surfactant to form an initial emulsion. Finally, the method comprises contacting the organopolysiloxane (A) with (D1) an organic acid catalyst to polymerize the organopolysiloxane (A) to give (A1) a high molecular weight organopolysiloxane and the oil-in-water emulsion. A personal care composition comprising the oil-in-water emulsion and a personal care ingredient is also disclosed.

Description

technical field [0001] The present invention relates generally to methods for preparing oil-in-water emulsions, and more particularly, to methods for preparing oil-in-water emulsions comprising high molecular weight organopolysiloxanes, methods for their preparation, and products comprising such oil-in-water emulsions. Personal care composition. Background technique [0002] Organopolysiloxanes are well known in the art and have many end uses, including use in compositions for personal care. For example, organopolysiloxanes are used in a variety of compositions for personal care and contact the skin, hair, nails, mucous membranes, and the like. Typically, these compositions are aqueous, and the organopolysiloxane does not readily disperse or dissolve in water. Consequently, organopolysiloxanes are typically delivered via emulsions. [0003] Silicone emulsions can be prepared by various methods such as mechanical emulsification or emulsion polymerization. Mechanical emuls...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/06A61K8/89A61Q19/00
CPCA61K8/062A61K8/31A61K8/466A61K8/892A61K8/922A61K2800/10A61K2800/21A61K2800/412A61K2800/805A61Q19/00C08G77/28C09D183/08C08G77/08C08L83/06
Inventor S·考温丁莉S·汉斯恩斯史歆宇S·优加齐奥
Owner DOW (SHANGHAI) HOLDING CO LTD