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Organosilicone composite powder for cosmetics and preparing method of organosilicone composite powder

A composite powder and organosilicon technology, applied in the field of cosmetic organosilicon composite powder and its preparation, can solve the problems of poor powder dispersion fluidity, adverse effects, difficult dispersion, etc., and achieves elimination of adverse effects, reduction of negative effects, The effect of improving liquidity

Active Publication Date: 2019-04-16
GUANGZHOU CRYSTAL SILICONES NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These silicone microspheres are easy to agglomerate and difficult to disperse in applications. Moreover, the surface of these silicone elastic microspheres has adsorbed a large amount of small molecule surfactants, which are irritating and limit their application in cosmetics.
[0004] Patents such as US 8133586B2 and CN103122070 have reported organosilicon microspheres coated with polyorgano-sesquioxanes and their preparation methods. These organosilicon microspheres coated with polyorgano-sesquioxanes have excellent resistance to Coagulation and dispersibility; the preparation method is to prepare silicone elastic microspheres by the method of the above-mentioned patent (such as US 4761454), and then hydrolyze polyorganosilsesquioxide by silane coupling agent in the presence of alkali and surfactant Alkanes are deposited on the silicone microspheres; this method is cumbersome and costly, and it will also bring in small molecule surfactants, which will inevitably leave a pungent smell after drying
Patents US5948469 and US7648766B2 disclose methods for preparing organic silicon elastic microspheres coated with inorganic particles such as silicon dioxide and titanium dioxide on the surface. These methods also require the preparation of stable organic silicon elastic microsphere aqueous dispersions in advance, and then Inorganic particles such as silicon and titanium dioxide are adsorbed on the surface, the preparation method is relatively cumbersome, and it is difficult to avoid the use of surfactants or other emulsion stabilizers, and the smell is not mild enough
Other patents report elastic microspheres coated with inorganic nanoparticles prepared by Pickering emulsion (inorganic nanoparticles not only act as small molecule surfactants or other emulsion stabilizers but also can be coated on the surface of silicone elastic microspheres) Powder, there are disadvantages such as poor dispersion and fluidity of the powder, and inorganic nanoparticles remaining on the surface of the powder have adverse effects on human skin.

Method used

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  • Organosilicone composite powder for cosmetics and preparing method of organosilicone composite powder
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  • Organosilicone composite powder for cosmetics and preparing method of organosilicone composite powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Add 9.5g of silicone spherical resin powder (average particle diameter of 1.5 microns) and 0.32g of polyether modified silicone oil (HLB value of 10 to 15) into 49.8g of water and stir at a low speed to prepare an aqueous dispersion;

[0033] (2), 26.8g viscosity is 100cSt vinyl silicone oil (vinyl content 1.1%) and 3.2g viscosity 60cSt hydrogen-containing silicone oil (hydrogen content 0.6%) and 10g silicon processing nano-titanium dioxide are mixed, then add 40ppm catalyst (according to Platinum atomic mass fraction meter), stir evenly, form organosilicon spherical rubber powder;

[0034] (3) Add the mixture described in (2) to the aqueous dispersion described in (1) and stir to mix, and form an emulsion at a temperature below 30°C, raise the temperature to 60-100°C, and react for 2-6 hours. The emulsion is vacuum-dried or spray-dried;

[0035] (4) After the obtained dry powder is milled and dispersed, it is sieved through a 100-200 mesh screen to obtain a cosmet...

Embodiment 2

[0037] (1) Add 14.6g of silicone spherical resin powder (average particle diameter of 1.5 microns) and 0.15g of polyether modified silicone oil (HLB value of 10 to 15) into 56.8g of water and stir at a low speed to prepare an aqueous dispersion;

[0038] (2), 14.2g viscosity is 200cSt vinyl silicone oil (vinyl content 0.75%) and 5.4g viscosity 60cSt hydrogen-containing silicone oil (hydrogen content 0.6%) and 8g silicon processing nano-titanium dioxide are mixed, then add 50ppm catalyst (according to Platinum atomic mass fraction meter), stir evenly, form organosilicon spherical rubber powder;

[0039] (3) Add the mixture described in (2) to the aqueous dispersion described in (1) and stir to mix, and form an emulsion at a temperature below 30°C, raise the temperature to 60-100°C, and react for 2-6 hours. The emulsion is vacuum-dried or spray-dried;

[0040] (4) After the obtained dry powder is milled and dispersed, it is sieved through a 100-200 mesh screen to obtain a cosme...

Embodiment 3

[0042] (1) Add 11g of silicone spherical resin powder (average particle size of 2 microns) and 0.38g of polyether modified silicone oil (HLB value of 10 to 15) into 54.6g of water and stir at a low speed to prepare an aqueous dispersion;

[0043] (2), 25.7g viscosity is 200cSt vinyl silicone oil (vinyl content 0.75%) and 2.3g viscosity 300cSt hydrogen-containing silicone oil (hydrogen content 0.25%) and 6g silicon processing nano zinc oxide are mixed, then add 50ppm catalyst ( Calculated by platinum atomic mass fraction), stir evenly to form organosilicon spherical rubber powder;

[0044] (3) Add the mixture described in (2) to the aqueous dispersion described in (1) and stir to mix, and form an emulsion at a temperature below 30°C, raise the temperature to 60-100°C, and react for 2-6 hours. The emulsion is vacuum-dried or spray-dried;

[0045] (4) After the obtained dry powder is milled and dispersed, it is sieved through a 100-200-mesh sieve to obtain a cosmetic organosilic...

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Abstract

The invention provides organosilicone composite powder for cosmetics. The organosilicone composite powder is characterized by being prepared from, hydrogen-containing silicone oil, an unsaturated compound, a catalyst, inorganic nanometer powder, organosilicone spherical resin powder and an organosilicone dispersing agent. The average particle size range of the composite powder is 3-100 microns, and the composite powder is of a multi-layer covering structure; the organosilicone spherical resin powder covers organosilicone spherical rubber powder, and the inorganic nanometer powder is uniformlydispersed in the organosilicone spherical rubber powder. The situation that nanometer powder is aggregated and influences the skin feeling and the ultraviolet-proof effect in the process of processingor using cosmetics can be avoided, and the situation that the nanometer powder is in contact with the skin to transfer free radicals to the skin can also be avoided; through an overall covering technology, the function of a nanometer physical sunscreen agent is improved; meanwhile, the adverse influence of the organosilicone composite powder on the skin is removed, and the organosilicone composite powder is mild and does not irritate the skin.

Description

technical field [0001] The invention belongs to the technical field of organosilicon materials, and in particular relates to an organosilicon composite powder for cosmetics and a preparation method thereof. Background technique [0002] Organosilicon elastic microsphere powder is widely used in cosmetics because of good oil absorption, dry and soft and smooth, and can be used as a skin feeling promoting additive; the method for preparing organosilicon elastic microspheres has been reported in patents (such as US 4761454, US4742142, US 4962165 , US 6497894B1, US 8133586B2, CN103122070). [0003] The methods disclosed in US 4761454, US 4742142, US 4962165, US 6497894B1 and other patents for preparing silicone elastic microspheres all use a large number of small molecule surfactants (such as polyoxyethylene alkyl ethers, etc.) as emulsifiers to emulsify vinyl-containing silicone oils. and hydrogen-containing silicone oil to form an emulsion, and then cross-linked to obtain sil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/894A61K8/895A61K8/23A61K8/25A61K8/27A61K8/29A61Q17/04
CPCA61Q17/04A61K8/23A61K8/25A61K8/27A61K8/29A61K8/894A61K8/895A61K2800/412
Inventor 王志雄陈光明王利斌林博王锦华
Owner GUANGZHOU CRYSTAL SILICONES NEW MATERIALS CO LTD
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