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A siloxane prepolymer solution and a preparing method thereof

A siloxane and prepolymerization technology, applied in textiles, papermaking, fiber treatment, etc., can solve the problems of high chemical activity, loss of surface function, poor binding force, etc., and achieve simple process, hydrophilization, and mild conditions Effect

Inactive Publication Date: 2017-11-17
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing siloxane products are generally siloxane monomers, such as vinyltriethoxysilane, methyltrimethoxysilane, (3-mercaptopropyl)trimethoxysilane, γ-ammonia Propylmethyldiethoxysilane, etc., have relatively single performance, and the surface film layer formed after condensation does not improve the surface function of the material much.
Some people compound siloxane and organic matter to prepare composite coatings. However, on the one hand, organic matter forms a new polymer layer on the surface of porous materials as a coating substance. On the other hand, in the coating system obtained by directly mixing silane into organic matter or grafting on organic matter, due to the small size of silane molecules and high chemical activity, dissolution may occur during use and the surface function will be lost.

Method used

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  • A siloxane prepolymer solution and a preparing method thereof
  • A siloxane prepolymer solution and a preparing method thereof

Examples

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Effect test

preparation example Construction

[0021] The invention provides a kind of preparation method of siloxane prepolymerization liquid, it comprises the following steps:

[0022] S1, adding polyalkoxysilane, functional monomer and initiator into an inert organic solvent to obtain a mixture;

[0023] S2, heating the mixture and performing a polymerization reaction under an inert atmosphere to obtain the siloxane prepolymer liquid.

[0024] In step S1, the functional monomer can be selected according to the functional requirements of the surface modification, specifically a monomer containing an unsaturated carbon-carbon double bond (C=C). The polyalkoxysilane is polyalkoxysilane containing unsaturated carbon-carbon double bond (C=C). The polyalkoxysilane and the functional monomer undergo a polymerization reaction under the action of the initiator to obtain a prepolymer. Specifically, the polyalkoxysilane is vinyltrimethoxysilane, vinyltriethoxysilane, methylvinyldiethoxysilane, methacryloxypropyltrimethylsilane ...

Embodiment 1

[0036](1) Add 1g of hydroxyethyl methacrylate, 1g of vinyltrimethoxysilane and 0.05g of benzoyl peroxide to 100mL of absolute ethanol in turn, pass through industrial nitrogen, and 200r at room temperature / min Mechanical stirring for 20min;

[0037] (2) Turn on the heating and gradually increase the temperature to 65° C., in an atmosphere of industrial nitrogen, mechanically stir at a speed of 200 r / min and react for 36 hours. After the reaction is finished, the heating is turned off, and the prepolymerization solution of the hydroxyethyl methacrylate / vinyltrimethoxysilane copolymer is obtained after the temperature is sufficiently lowered.

[0038] The polyurethane sponge is soaked in the diluted solution of the obtained pre-polymerization solution, and the surface cross-linking treatment can improve the hydrophilicity of the surface of the polyurethane sponge.

Embodiment 2

[0040] (1) Add 4g of N-vinylpyrrolidone, 3g of vinyltriethoxysilane and 0.1g of azobisisoheptyl cyanide to 100mL of triethyl phosphate successively, feed high-purity nitrogen, and 250r / min mechanical stirring at room temperature for 30min;

[0041] (2) Turn on the heating and gradually increase the temperature to 80° C., in an atmosphere of high-purity nitrogen, mechanically stir at a speed of 250 r / min and react for 24 hours. Turn off the heating after the reaction is finished, and obtain a prepolymer liquid of N-vinylpyrrolidone / vinyltriethoxysilane copolymer after the temperature is sufficiently lowered.

[0042] The polypropylene non-woven fabric is immersed in the diluted solution of the obtained pre-polymerization solution, and after surface cross-linking treatment, the polypropylene non-woven fabric with super-hydrophilic properties can be obtained.

[0043] Depend on figure 1 It can be seen that the prepolymer (see curve b) is at 1704cm -1 (corresponding to the C=C ...

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Abstract

The invention relates to a siloxane prepolymer solution. The siloxane prepolymer solution includes a prepolymer and an inert organic solvent. The prepolymer is a copolymer prepared by polymerizing multi-alkoxy silane and a functional monomer. The multi-alkoxy silane is at least one of vinyltrimethoxysilane, vinyltriethoxysilane, methylvinyldiethoxysilane and methacryloyloxypropyltrimethylsilane. The functional monomer is at least one of 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 2-(dimethylamino)ethyl methacrylate, acrylic acid, N-[3-(dimethylamino)propyl]-2-methacrylamide, poly(ethylene glycol) methacrylate, methylmethacrylate, acrylamide and N-vinylpyrrolidone. The invention also relates to a preparing method of the siloxane prepolymer solution.

Description

technical field [0001] The invention relates to the field of synthesis of surface modification materials, in particular to a siloxane prepolymer solution for surface crosslinking modification and a preparation method thereof. Background technique [0002] In recent years, organosilicon materials, especially siloxanes, have been widely used in the surface modification of materials. Since the siloxane has 1 functional group and 1-3 alkoxy groups, the alkoxy group is easy to hydrolyze, so the siloxane can self-condense on the surface of the material to form a silane film. The obtained silane film is often very thin (generally less than 1 micron), so as to impart functionality (functional groups) to the surface of the material while minimizing changes to the original surface morphology of the material. However, the existing siloxane products are generally siloxane monomers, such as vinyltriethoxysilane, methyltrimethoxysilane, (3-mercaptopropyl)trimethoxysilane, γ-ammonia Prop...

Claims

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Application Information

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IPC IPC(8): C08F220/28C08F230/08C08F226/10C08F220/06C08F220/34C08F220/60C08J9/42C08J3/24C08J7/16D06M15/356C09D139/06C09D143/04C08L75/04C08L67/04C08L27/16C08L81/06D06M101/20
CPCC09D139/06C09D143/04D06M15/3562C08F220/06C08F220/28C08F220/34C08F220/60C08F226/10C08F230/08C08J3/246C08J7/16C08J9/42C08J2367/04C08J2375/04C08J2381/06C08J2327/16D06M2101/20C08F220/281C08F220/286
Inventor 刘富林海波
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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