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A kind of preparation method of titanium-containing silicone resin for cosmetics

A technology of silicone and cosmetics, applied in the direction of cosmetics, skin care preparations, etc., can solve the problems of high product cost, complicated process, and long production cycle, and achieve the effect of low product cost, simple process, and short production cycle

Active Publication Date: 2017-10-31
XUANCHENG GUIXIN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the composites prepared by the above method, titanium dioxide forms a single phase, covers the surface of the silicone resin or is wrapped in the silicone resin, and only a small amount of Ti-O-Si bonds exist at the interface between the two phases. Therefore, it can only absorb ultraviolet light below 300nm, and the ultraviolet transmittance is still not lower than 5%.
In addition, the above two-step method also has the disadvantages of complicated process, long production cycle and high product cost.

Method used

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  • A kind of preparation method of titanium-containing silicone resin for cosmetics
  • A kind of preparation method of titanium-containing silicone resin for cosmetics
  • A kind of preparation method of titanium-containing silicone resin for cosmetics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Raw materials:

[0021] Silicone resin precursor: 54.3 g of trimethylchlorosilane (the content of silicon atoms is 0.5 mol); 104 g of tetraethoxysilane (the content of silicon atoms is 0.5 mol).

[0022] Titanium dioxide precursor: 10.5 g of n-butyl titanate (wherein the titanium atom content is 0.031 mol).

[0023] Mixed solvent: made by mixing 50mL of ethanol, 100mL of water and 8mL of 35% hydrochloric acid.

[0024] Extractant: toluene 300mL.

[0025] 2) Preparation steps:

[0026] Dissolve trimethylchlorosilane, tetraethoxysilane and n-butyl titanate in a mixed solvent, gradually heat to 80°C, keep stirring for 3 hours, and cool to room temperature; add toluene while stirring, and let stand to separate layers Finally, the organic phase was separated, the toluene phase was repeatedly washed with 200 mL of water twice, and then the toluene phase was distilled to separate the toluene to obtain 54.3 g of titanium-containing silicone resin.

Embodiment 2

[0028] 1) Raw materials:

[0029] Silicone resin precursor: 65.1 g of trimethylchlorosilane (0.6 mol of silicon atoms); 83.2 g of tetraethoxysilane (0.4 mol of silicon atoms).

[0030] Titanium dioxide precursor: n-butyl titanate 10.5g (the content of titanium atoms is 0.031mol)

[0031] Mixed solvent: made by mixing 50mL of ethanol, 100mL of water and 8mL of 35% hydrochloric acid.

[0032] Extractant: toluene 300mL.

[0033] 2) Preparation steps:

[0034] Dissolve trimethylchlorosilane, tetraethoxysilane and n-butyl titanate in a mixed solvent, gradually heat to 80°C, keep stirring for 3 hours, and cool to room temperature; add toluene while stirring, and let stand to separate layers Finally, the organic phase was separated, and the toluene phase was repeatedly washed twice with 200 mL of water, and then the toluene phase was distilled to separate the toluene to obtain 52.4 g of titanium-containing silicone resin.

Embodiment 3

[0036] 1) Raw materials:

[0037] Silicone resin precursor: 21.7 g of trimethylchlorosilane (the content of silicon atoms is 0.2 mol); 166.4 g of tetraethoxysilane (the content of silicon atoms is 0.8 mol).

[0038] Titanium dioxide precursor: n-butyl titanate 10.5g (the content of titanium atoms is 0.031mol)

[0039] Mixed solvent: made by mixing 50mL of ethanol, 100mL of water and 8mL of 35% hydrochloric acid.

[0040] Extractant: toluene 300mL.

[0041] 2) Preparation steps:

[0042] Dissolve trimethylchlorosilane, tetraethoxysilane and n-butyl titanate in a mixed solvent, gradually heat to 80°C, keep stirring for 3 hours, and cool to room temperature; add toluene while stirring, and let stand to separate layers Finally, the organic phase was separated, the toluene phase was repeatedly washed with 200 mL of water twice, and then the toluene phase was distilled to separate the toluene to obtain 56.7 g of titanium-containing silicone resin.

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Abstract

The invention relates to a preparation method for a titanium-containing organic silicon resin for cosmetics. The preparation method comprises the following steps: (1) dissolving an organic silicon resin precursor mixture and N-butyl titanate in a molar ratio of silicon atoms in the organic silicon resin precursor mixture formed by mixing trimethylchlorosilane and tetraethoxysilane to titanium atoms in N-butyl titanate=(40-30) to 1 in a mixed solvent prepared by mixing ethanol or isopropanol, water and hydrochloric acid with the concentration of 35%, heating the mixture at 50-90 DEG C for 2-7 hours, and cooling the mixture to room temperature; (2) adding organic extracting agents normal hexane, methylbenzene or hexamethyldisiloxane while stirring, leaving the mixture to stand and layering, and separating an organic phase; and (3) distilling the organic phase and removing the organic extracting agents to obtain the titanium-containing organic silicon resin. According to the titanium-containing organic silicon resin prepared by virtue of the method, not only is the ultraviolet wavelength absorbing range wider, but also ultraviolet rays with wavelength from 175-300 nm are nearly impenetrable.

Description

technical field [0001] The invention relates to a compound of organic silicon resin and metal oxide, in particular to a compound of silane resin and titanium dioxide, which can shield ultraviolet light. Background technique [0002] Because of its -Si-O-Si- skeleton, silicone resin has excellent weather resistance, thermal stability and chemical stability, and is widely used in silicone pressure-sensitive adhesives, liquid silicone rubber, coatings, etc. and cosmetic additives. Among them, when using silicone resin as a paint and cosmetic additive, in addition to considering other properties of the product, because of climate change, it is usually necessary to make the paint and cosmetics have an anti-ultraviolet function, which can usually be achieved by adding UV light shielding agent to obtain. [0003] Nano-titanium dioxide has a good function of absorbing ultraviolet light, so it is often used in combination with silicone resin to improve the ultraviolet absorption cap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/08C08K3/22C08G77/24A61K8/891A61Q17/04
Inventor 吴丽莉
Owner XUANCHENG GUIXIN NEW MATERIAL CO LTD