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Method for preparing sun-proof micelle emulsifier

An emulsifier and micelle technology, applied in cosmetic preparations, skin care preparations, cosmetics and other directions, can solve the problems of poor water and sweat resistance, high irritation, easy loss, etc., and achieves good application prospects, simple preparation, The effect of good emulsifying properties

Active Publication Date: 2011-05-25
广州颜馨日化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These are all small molecule absorbers, and all have the following disadvantages in the application process: (1) Most of them belong to ultraviolet absorbers in the UVB region, and have poor light and heat stability
(2) When used in cosmetics, it has poor water and sweat resistance, is easy to lose, is highly irritating, and easily causes skin allergies
Researchers at home and abroad have done a lot of work on the improvement of UV absorbers, but there is relatively little research work on polymer UV absorbers, especially the lack of research on the development and research of polymers for cosmetics.

Method used

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  • Method for preparing sun-proof micelle emulsifier
  • Method for preparing sun-proof micelle emulsifier
  • Method for preparing sun-proof micelle emulsifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1 ionic random copolymer P (VM- co -AMPS) preparation

[0022] Take AMPS 7.8g (37.5mmol) and VM 3.6g (12.5mmol) to dissolve in 15mL DMF, stir through N 2 After 15 minutes, add AET 0.34g (3mmol) and AIBN 0.16g (1mmol), and then pass N 2 15min, then seal the bottle mouth, transfer to 70 ℃ oil bath, after reacting for 8 hours, take the cup substrate, precipitate in acetone, dissolve in water, freeze-dry after dialysis to obtain pure random copolymer P(VM- co -AMPS).

Embodiment 2

[0023] Example 2 P(VM- co -AMPS) micelles preparation

[0024] Weigh the polymer P(VM- co -AMPS) 5 mg, dissolved in 100 mL of water, stirred for 1 hour to obtain a micellar solution with a concentration of 0.05 mg / mL.

Embodiment 3

[0025] Example 3 P(VM- co -AMPS) micellar morphology

[0026] Take 0.05mg / mL of P(VM- co -AMPS) micellar solution 5mL, drop on the mica sheet and dry at room temperature for 48 hours, observe the morphology of the micelles under the atomic force microscope. figure 1 .

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Abstract

The invention discloses a method for preparing a sun-proof micelle emulsifier, and belongs to the technical field of macromolecular materials. In the method for preparing the sun-proof micelle emulsifier, azodiisobutyronitrile is used as an initiator, dimethyl formamide is used as a solvent, mercaptoethylamine is used as a chain transfer agent, and 4-methyl-7-paravinylphenylmethyleneoxy coumarin (VM) and 2-acrylamide-2-methylpropanesulfonic acid (AMPS) are used as two monomers; and a random copolymer P (VM-co-AMPS) is prepared by controlling the feeding moles of the AMPS and the VM and adopting common free radical polymerization. The polymerization product needs to be precipitated in acetone, dialyzed in water and freeze-dried to form pure P (VM-co-AMPS) powder for synthesizing reversible optical dimer type water-soluble polymer, and the polymer can form spherical micelles in aqueous solution. The micelles have absorption effect on ultraviolet rays of different wavelengths and good emulsifying performance, and can be applied in the field of sun-proof cosmetics. The method for preparing the micelles is simple, ensures mild conditions, and avoids the use of a solvent.

Description

technical field [0001] The invention discloses a preparation method of a sunscreen micellar emulsifier, which belongs to the technical field of polymer materials. Background technique [0002] In the past few decades, the development and research of cosmetics have achieved continuous development, and many new functional products have come out continuously. As a type of functional cosmetics, sunscreen products have more and more ingredients in their formulations. The reason why sunscreen cosmetics can "sunscreen" is because the formula contains a type of ultraviolet absorber. At present, UV absorbers commonly used in sunscreen cosmetics mainly include: salicylates, p-aminobenzoates, benzophenones, methoxycinnamates, benzotriazoles, substituted propylene Cyanides, dibenzoylmethane, etc. These are all small molecule absorbers, and all have the following disadvantages in the application process: (1) most of them belong to ultraviolet absorbers in the UVB region, and have poor...

Claims

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Application Information

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IPC IPC(8): A61K8/81A61Q17/04C08F220/58C08F212/32
Inventor 白绘宇徐晶郑俊超冯建宾思远陈谦李天纵刘晓亚
Owner 广州颜馨日化有限公司