Thermally stable oil-in-water microemulsion

Abstract

The invention relates to oil-in-water microemulsion. The oil-in-water microemulsion comprises the following components based on the total weight: A) 75 to 94 weight percent of aqueous phase, B) 0.5 to 5 weight percent of oil phase, C) 2 to 20 weight percent of oil-in-water nonionic emulsifier serving as a surfactant, and D) 0.2 to 2 weight percent of auxiliary nonionic surfactant or auxiliary zwitterionic surfactant with the hydrophile-lipophile balance (HLB) value more than or equal to 17, wherein the weight ratio of the component C to the component D is 5 to 20. The oil-in-water microemulsion of the invention has thermal stability, can maintain the transparent property of the oil-in-water microemulsion at room temperature in the condition of high temperature, and has no phenomenon of turbidity, emulsion breaking or demixing; moreover, the microemulsion has a simple formula and is easy to prepare; in addition, the microemulsion can remove cosmetics rapidly, has a cleaning effect of being washed easily, also can be used as a resident product, and provides a moisture feeling different from a common water aqua product.

Description

technical field

[0001] The invention relates to a thermally stable oil-in-water microemulsion. Background technique

[0002] If two or more immiscible liquids are mixed and emulsified, and the average diameter of dispersed droplets or emulsified particles is between 5 and 100 nm, the system is called a microemulsion. Microemulsion is usually a system formed by mixing components such as water, oil, surfactant and co-surfactant, and the system is homogeneous on a macroscopic scale. Microemulsions are usually translucent to transparent due to the poor scattering ability of dispersed tiny droplets to light. A microemulsion whose dispersed phase is oil and whose dispersion medium is water is called an oil-in-water microemulsion, and vice versa is called a water-in-oil microemulsion. Thermodynamically, microemulsions are stable systems that can form spontaneously without special production equipment and processes. Microemulsion has unique appearance and special performance, and...

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