Polysiloxane composite particle cladding chemical sun-screening agent formed by p-methoxycinnamic acid esters and preparation method thereof

A technology of methoxycinnamic acid and chemical sunscreen agent, which is applied in the field of polysiloxane composite particles to achieve the effects of good sunscreen effect, stable performance and reduced irritation

Inactive Publication Date: 2012-06-13
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, general sunscreens only have a sunscreen effect on one of the UVA or UVB bands.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A polysiloxane composite particle coated with a chemical sunscreen formed by ethyl p-methoxycinnamate is prepared by the following method:

[0051] (1) Preparation of nanoemulsions containing chemical sunscreens formed from ethyl p-methoxycinnamate

[0052] The described nanoemulsion comprising the chemical sunscreen formed by ethyl p-methoxycinnamate is calculated by mass percentage, and its raw material composition and content are as follows:

[0053] Sunscreen 5%

[0054] Emulsifier 5%

[0055] Grease 5%

[0056] Co-emulsion 5%

[0057] The remainder is water;

[0058] The sunscreen is a chemical sunscreen formed from ethyl p-methoxycinnamate, a product produced by BASF (BASF) Chemical Co., Ltd.;

[0059] The emulsifier is fatty alcohol polyoxyethylene ether (21EO), an emulsifier for cosmetics produced by CRODA Chemical Co., Ltd.;

[0060] Described grease is isopropyl palmitate, the cosmetic grease that BASF (BASF) Chemical Co., Ltd. produces;

[0061] Descri...

Embodiment 2

[0082] A kind of nano-polysiloxane composite particle coated with a chemical sunscreen formed by octyl p-methoxycinnamate is prepared by the following method:

[0083] (1) Preparation of nanoemulsions containing chemical sunscreens formed from octyl p-methoxycinnamate

[0084] The described nanoemulsion comprising the chemical sunscreen formed by octyl p-methoxycinnamate is calculated by mass percentage, and its raw material composition and content are as follows:

[0085] Sunscreen 0.1%

[0086] Emulsifier 0.1%

[0087] Grease 0.1%

[0088] Co-emulsion 0.1%

[0089] The remainder is water;

[0090] The sunscreen is a chemical sunscreen comprising octyl p-methoxycinnamate, a product produced by BASF (BASF) Chemical Co., Ltd.;

[0091] The emulsifier is a fatty alcohol polyoxyethylene ether (2EO), an emulsifier for cosmetics produced by CRODA (Heda) Chemical Co., Ltd.;

[0092] The oil is macadamia nut oil, a product produced by lipo (Laibaokang) Daily Chemical (Shanghai)...

Embodiment 3

[0102] A polysiloxane composite particle coated with a chemical sunscreen formed by isooctyl p-methoxycinnamate is prepared by the following method:

[0103] (1) Preparation of nanoemulsion containing chemical sunscreen formed by isooctyl p-methoxycinnamate

[0104] The nanoemulsion comprising the chemical sunscreen formed by isooctyl p-methoxycinnamate is calculated by mass percentage, and its raw material composition and content are as follows:

[0105] Sunscreen 10%

[0106] Emulsifier 20%

[0107] Grease 10%

[0108] Co-emulsion 20%

[0109] The remainder is water;

[0110] The sunscreen is a chemical sunscreen formed from isooctyl p-methoxycinnamate, a product produced by BASF (BASF) Chemical Co., Ltd.;

[0111] The emulsifier is fatty alcohol polyoxyethylene ether (25EO), a cosmetic emulsifier produced by BASF (BASF) Chemical Co., Ltd.;

[0112] Described grease is isooctyl palmitate, the cosmetic grease that BASF (BASF) Chemical Co., Ltd. produces;

[0113] Descr...

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Abstract

The invention discloses a polysiloxane composite particle cladding a chemical sun-screening agent formed by p-methoxycinnamic acid esters. A preparation method for the composite particle comprises the following steps: uniformly dispersing the oil-phase components, i.e., the chemical sun-screening agent formed by p-methoxycinnamic acid esters, an emulsifying agent, grease and an auxiliary emulsifying agent; adding the oil-phase components while homogenizing water, carrying out homogeneous stirring and cooling an obtained mixture to room temperature so as to obtain nanometer emulsion containing the chemical sun-screening agent formed by p-methoxycinnamic acid esters; preparing a solution of hydrolysates of organosilicon monomers, mixing the solution with the nanometer emulsion containing the chemical sun-screening agent formed by p-methoxycinnamic acid esters, adjusting the pH value of an obtained mixture to be 7.5 to 13.5, controlling temperature to be 0 to 100 DEG C, a rotating speed to be 10 to 1000 r/min and rotating time to be 0.1 to 24 h so as to obtain a fluid suspension of polysiloxane composite particles cladding the chemical sun-screening agent formed by p-methoxycinnamic acid esters and carrying out washing, centrifugation, drying and the like on the fluid suspension so as to obtain a final product.

Description

technical field [0001] The present invention relates to a polysiloxane composite particle coated with a chemical sunscreen, more specifically to a polysiloxane composite particle coated with a chemical sunscreen formed by p-methoxycinnamate and its Preparation. Background technique [0002] Chemical sunscreens mainly refer to organic compounds that can absorb harmful ultraviolet radiation, usually called chemical ultraviolet absorbers. According to the different wavelength bands of protective radiation, UV (ultraviolet) absorbers can be divided into two types: UVA (living ultraviolet rays) and UVB (outdoor ultraviolet rays). From the chemical structure, it can be divided into p-aminobenzoic acid and its esters, salicylate and its derivatives, anthranilate, benzophenone and its derivatives, p-methoxycinnamic acid, methane derivatives and camphor derivatives. The chemical sunscreens used in cosmetics will have certain side effects due to their photoinstability and skin irri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/891A61K8/92A61K8/37A61Q17/04
Inventor 张婉萍辛忠朱海洋陆馨李牧牛文霞
Owner SHANGHAI INST OF TECH
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