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Crosslinkable fluorosilicone resin, painting and super-amphiphobic coating prepared by same

A technology of fluorosilicone resin and coating, applied in the field of super-amphiphobic materials, can solve the problems of poor durability and friction resistance of super-amphiphobic coatings, narrow application areas, toxic organic solvents, etc., and achieve improved roughness and good surface energy , the effect of strong cross-linking

Active Publication Date: 2013-11-27
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] But for now, the current super-amphiphobic coatings still have the following four major disadvantages: First, the process of constructing super-hydrophobic or super-amphiphobic coatings is complicated, generally requires multiple steps, and the source of raw materials used is relatively expensive
Second, the constructed super-amphiphobic coating does not have good mechanical properties, mainly because no strong cross-linking substance is used to cross-link the super-amphiphobic coating to the surface of the substrate. In the current literature, organic polymers are generally used. It is a cross-linking agent, such as silicone resin PMDS (about 200 articles), polyurethane PU
As a result, the durability and friction resistance of superamphiphobic coatings are very poor
Third, expensive and toxic organic solvents are required in the process of constructing super-amphiphobic coatings
Fourth, the application area is narrow. Generally, it is a super-hydrophobic or super-amphiphobic coating designed for a special surface, but cannot be applied to the surface of most substrates.
[0008] However, the above-mentioned amphiphilic fluoropolymers are all block polymers prepared by controllable active polymers. Relatively speaking, the synthesis cost of block polymers is relatively high, and the process is very complicated, so it is not suitable for large-scale industries. change

Method used

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  • Crosslinkable fluorosilicone resin, painting and super-amphiphobic coating prepared by same
  • Crosslinkable fluorosilicone resin, painting and super-amphiphobic coating prepared by same
  • Crosslinkable fluorosilicone resin, painting and super-amphiphobic coating prepared by same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) Preparation of cross-linkable fluorosilicone resin: Mix hydrogen-containing silicone A, cross-linkable substance B, fluorine-containing substance C, and modified silica D in solvent E, and add it to the reaction kettle. Inert gas was introduced, then the stirring speed was kept at 100 rpm, the temperature was raised to 60 degrees Celsius, and catalyst F was added. Stirring was maintained for up to 5 hours. Then the reactant is precipitated into n-hexane or methanol to obtain a cross-linkable fluorosilicone resin. Among them, the mass ratio of hydrogen-containing silicone A, cross-linkable substance B, fluorine-containing substance C, modified silica D, catalyst F and solvent E is: 1:0.5:0.5:0.1:0.00001:1;

[0052] The hydrogen-containing silicone A has the hydrogen-containing silicone oil of the following structural formula:

[0053] where p=10; q=800;

[0054] The cross-linkable substance B is glycidyl methacrylate (GMA);

[0055] The fluorine-containing mono...

Embodiment 2

[0064] (1) Preparation of cross-linkable fluorosilicone resin: Mix hydrogen-containing silicone A, cross-linkable substance B, fluorine-containing substance C, and modified silica D in solvent E, and add it to the reaction kettle. Pass in an inert gas, then keep the stirring speed at 500 rpm, raise the temperature to 100 degrees Celsius, then add catalyst F, keep stirring for 5 hours; then precipitate the reactant into n-hexane or methanol to obtain a cross-linkable fluorosilicone resin. Among them, the mass ratio of hydrogen-containing silicone A, cross-linkable substance B, fluorine-containing substance C, modified silica D, catalyst F and solvent E is: 1:20:50:2:0.0001:100;

[0065] The hydrogen-containing silicone A has the following structural formula:

[0066] where p=100; q=5000;

[0067] The cross-linkable substance B is propenyl glycidyl ether (AGE);

[0068] The fluorine-containing monomer C is heptadecafluoroethyl methacrylate;

[0069] The catalyst F is chloro...

Embodiment 3

[0077] (1) Preparation of crosslinkable fluorosilicone resin: Mix hydrogen-containing silicone A, crosslinkable substance B, fluorine-containing substance C and modified silica D in solvent E, add to the reaction kettle, and pass Inject an inert gas, then keep the stirring speed at 1000rpm, raise the temperature to 60 degrees Celsius, then add catalyst F, keep stirring for 5 hours; then precipitate the reactant into n-hexane or methanol to obtain the required crosslinkable fluorosilicone resin. Among them, the mass ratio of hydrogen-containing silicone A, cross-linkable substance B, fluorine-containing substance C, modified silica D, catalyst F and solvent E is: 1:10:20:1:0.00008:80;

[0078] The hydrogen-containing silicone A has the following structural formula:

[0079] where p=30; q=1000;

[0080] The cross-linkable substance B is polyglycidyl methacrylate (PGMA) containing alkyne at the end, and its structural formula is:

[0081] t is 1000;

[0082] The structura...

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Abstract

The invention belongs to the field of super-amphiphobic materials and discloses a crosslinkable fluorosilicone resin, a coating and a super-amphiphobic coating prepared from the crosslinkable fluorosilicone resin and the coating. The crosslinkable fluorosilicone resin is compared via the steps as follows: hydrogeneous organosilicon A, crosslinkable substance B, fluorine-containing substance C and modified silicon dioxide D are mixed in a dissolvent, added into a reactor, and introduced with inert gas, agitation is kept at a speed of 100-1,000 rpm, the temperature is raised to 60-140 DEG C, an activator is added and agitated for 5-24 h, the reagent is deposited into n-hexane or methanol. The crosslinkable fluorosilicone resin coating is formed by crosslinkable fluorosilicone resin, a curing agent, an activator and a dissolvent; the super-amphiphobic coating is formed by that a substrate is immersed in the crosslinkable fluorosilicone resin painting, or the crosslinkable fluorosilicone resin painting is sprayed on the surface of the substrate and baked in a baking oven for 1-20 h at 40-120 DEG C.

Description

technical field [0001] The invention belongs to the field of super-amphiphobic materials, in particular to a cross-linkable fluorosilicone resin, a coating and a super-amphiphobic coating prepared therefrom. Background technique [0002] As far as the current literature reports are concerned, most of the methods for constructing superamphiphobic materials are relatively complicated. With the development of super-amphiphobic materials, the process of preparing super-amphiphobic materials is increasingly pursuing simplification. Only by simplifying the process steps and reducing the cost of raw materials and processes can the industrialization of super amphiphobic materials be further advanced. [0003] In recent years, more and more documents and patents have mentioned the use of simple methods to construct super-amphiphobic materials, such as documents: Hongxia Wang et al. using TEOS, NH 4 OH and FAS react in absolute ethanol sol-gel to obtain a fluorine-containing nano-si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/385C08G81/02C09D183/08C09D187/00C09D7/12D06M15/657
Inventor 胡继文邹海良林树东李妃罗洪盛胡美龙
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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