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A kind of preparation method and application of si-o-c polyether-based organosilicon elastomer gel

A technology based on polyether and silicone, which is applied in the direction of medical preparations containing active ingredients, skin care preparations, pharmaceutical formulations, etc., and can solve problems such as limitations, restrictions on the scope of use of elastomers, and limited hydrophilicity of elastomer emulsions. , to achieve the effect of moisturizing the skin

Active Publication Date: 2020-07-21
GUANGZHOU TINCI MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The silicone elastomer synthesized according to this method has strong lipophilicity, and is generally added to the pure oil system formula or the oil phase of the emulsified system first. It is this characteristic that limits its use in pure water system or oil phase with a small proportion. The use of the emulsification system, which greatly limits the scope of use of the elastomer
Invention patent CN 106832300A reports a method for preparing silicone elastomers that can be added to water-based formulations, but the method is to first prepare hydrogen-containing silicone oil and vinyl silicone oil into an emulsion, and then prepare it by addition reaction. The process is cumbersome, and the prepared elastomer emulsion has limited hydrophilicity
However, there is no report on the preparation of Si-O-C type silicone elastomers by reacting alcoholic hydroxyl groups with Si-H bonds in hydrogen-containing polysiloxanes.
This is mainly because in the field of polysiloxane modification technology, it is generally believed that the Si-O-C bond has poor hydrolysis resistance and stability, which limits its application.

Method used

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  • A kind of preparation method and application of si-o-c polyether-based organosilicon elastomer gel
  • A kind of preparation method and application of si-o-c polyether-based organosilicon elastomer gel
  • A kind of preparation method and application of si-o-c polyether-based organosilicon elastomer gel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) In a 1000mL round-bottom four-neck flask, weigh 100.0g of hydrogen-containing polysiloxane with a Si-H content of 0.5% and a viscosity of 30.0cSt at 25°C, and 269.4g of polyethylene glycol 1 (where x= 20, average number average molecular weight M n =898), the ratio of the alcoholic hydroxyl group to the Si-H bond in the material is 1.2:1, and 369.4g of ethanol is added as a solvent (the solvent accounts for 50% of the material ratio), the temperature is raised to 60°C under mechanical stirring, and aluminum acetylacetonate is added As a catalyst, the amount added is 1% of the total amount of materials, and kept at this temperature for 6.0 hours. After the reaction, the solvent was removed under reduced pressure to obtain a silicone elastomer powder 1

[0027] (2) Take 100.0g of silicone elastomer powder 1 and add it to a 1000mL open beaker, and add 400.0g of linear small molecular polysiloxane with a viscosity of 6.0cSt at 25°C. At this time, the proportion of disp...

Embodiment 2

[0029] (1) In a 1000mL round-bottom four-neck flask, weigh 25.0g of hydrogen-containing polysiloxane with a Si-H content of 0.5% and a viscosity of 30.0cSt at 25°C, and 166.4g of polyethylene glycol 2 (where x= 50, average number average molecular weight M n =2218), the ratio of alcoholic hydroxyl group and Si-H bond in the material is 1.2:1, and add 191.4g n-propanol as solvent (solvent accounts for material ratio and be 50%), be warming up to 80 ℃ under mechanical stirring, add acetyl Zinc acetonate is used as a catalyst, the addition amount is 1% of the total amount of materials, and the reaction is kept at this temperature for 6.0h. After the reaction, the solvent was removed under reduced pressure to obtain a silicone elastomer powder 2 .

[0030] (2) Take 100.0g of silicone elastomer powder 2 and add it to a 1000mL open beaker, and add 400.0g of linear small molecular polysiloxane with a viscosity of 1.0cSt at 25°C. At this time, the proportion of dispersant is 80%. Af...

Embodiment 3

[0032] (1) In a 1000mL round-bottom four-neck flask, weigh 25.0g of hydrogen-containing polysiloxane with a Si-H content of 1.0% and a viscosity of 5.0cSt at 25°C, and 134.7g of polyethylene glycol 1 (wherein x= 20, average number average molecular weight M n =898), the ratio of alcoholic hydroxyl group and Si-H bond in the material is 1.2:1, and add 106.5g isopropanol as solvent (solvent accounts for material ratio and be 40%), be warming up to 50 ℃ under mechanical stirring, add acetyl Iron acetone is used as a catalyst, the addition amount is 2% of the total amount of materials, and the reaction is kept at this temperature for 6.0h. After the reaction, the solvent was removed under reduced pressure to obtain a silicone elastomer powder 3 .

[0033] (2) Take 100.0g of silicone elastomer powder 3 and add it to a 1000mL open beaker, and add 400.0g of linear small molecular polysiloxane with a viscosity of 50.0cSt at 25°C. At this time, the proportion of dispersant is 80%. Af...

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Abstract

The invention belongs to the field of organic silicon elastomers, and discloses a preparation method and an application of a Si-O-C type polyether-base organic silicon elastomer gel. The method includes the steps of: uniformly mixing hydrogen-containing polysiloxane, polyethylene glycol and a solvent, heating the mixture to 50-100 DEG C, adding an acetylacetone metal complex as a catalyst to perform heat preservation reaction for 2-10 h; reducing pressure to remove the solvent to prepare a polyether-base organic silicon elastomer powder; under mechanical stirring, adding the polyether-base organic silicon elastomer powder to a dispersant to uniformly mix and disperse the powder to form the Si-O-C type polyether-base organic silicon elastomer gel. With the polyethylene glycol as the crosslinker, the organic silicon elastomer gel has hydrophilicity and can be added to a water-phase system. Due to the unique hydrolysis property of Si-O-C, the elastomer gel can be partly hydrolyzed in a daily care product, so that a special smooth and moisturizing skin feel is supplied.

Description

technical field [0001] The invention belongs to the field of silicone elastomers, in particular to a preparation method and application of Si-O-C polyether-based silicone elastomer gel. Background technique [0002] Silicone elastomer gel is generally prepared by dispersing cross-linked large molecular weight silicone powder into a small molecule carrier fluid. The commonly used small molecule carrier fluid is decamethylcyclopentasiloxane (D 5 ), low viscosity methyl silicone oil, isomerized dodecane, cyclohexane, etc. For example, invention patents CN 106633076A and CN 102512339B report the preparation methods of several silicone elastomers with different structures. The silicone elastomer synthesized according to this method has strong lipophilicity, and is generally added to the pure oil system formula or the oil phase of the emulsified system first. It is this characteristic that limits its use in pure water system or oil phase with a small proportion. The use of emuls...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/46A61K8/894A61K8/04A61Q19/00
CPCA61K8/042A61K8/894A61K2800/10A61Q19/00C08G77/46
Inventor 吴伟霍梦月柳晨醒户献雷张宇
Owner GUANGZHOU TINCI MATERIALS TECH
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