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Preparation method of organic silicon self-repairing antifouling material

A self-healing, silicone technology, used in antifouling/underwater coatings, biocide-containing paints, coatings, etc. The effect of pollution period effect, shortening use period effect and broad application prospect

Active Publication Date: 2021-06-29
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing technology, most of the self-repairing coatings are repaired with external aid. The disadvantage is that after a repair, the repairing components will be partially exhausted, and most of the coatings cannot achieve repeated self-repairing.

Method used

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  • Preparation method of organic silicon self-repairing antifouling material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The process of preparing the silicone self-repairing antifouling material according to the present embodiment is:

[0019] (1) 1.0 g of melamine and mass percentage concentration of 25% were added to the three flask, and magnetically stirred at 20 ° C for 1 h;

[0020] The amino content of melamine is 2.4 × 10 -2 Mol, the mass of glutaraldehyde is 9.8 g, the aldehyde group in the pentaroxaldehyde solution is 4.8 × 10 -2MOL, the molar ratio of the amino functional group and the aldehyde group function group is 0.5;

[0021] (2) PDMS and 20 ml of tetrahydrofuran were added to the three flasks of step (1) at a PDMS and 20 ml of tetrahydrofuran of a 24.0 g of a molecular weight of 1000 g / mol;

[0022] (3) At a water bath condition at 25 ° C, the three flask of the magnetic stirring step (2) for 3 h, resulting in the silicone self-repairing antifouling material.

[0023] The process of self-repairing the self-repairing material of the silicone prepared in the present embodimen...

Embodiment 2

[0025] The process of preparing the silicone self-repairing antifouling material according to the present embodiment is:

[0026] (1) 1.26 g of melamine and mass percentage concentration of 25% were added to the three flask, and magnetic force was stirred at 25 ° C for 1 h;

[0027] The amino content of 3.0 × 10 in melamine is 3.0 × 10 -2 Mol, the mass of the glutaraldehyde is 16.3 g, the aldehyde group in the aqueous solution of glutaraldehyde is 8.0 × 10 -2 MOL, the molar ratio of the amino functional group and the aldehyde functional group is 0.375;

[0028] (2) PDMS and 20 ml of tetrahydrofuran were added 80 ml of tetrahydrofuran in the step (1) of PDMS and 20 mL of tetrahydrofuran;

[0029] (3) At a water bath condition at 25 ° C, the three flask of the magnetic stirring step (2) for 3 h, resulting in the silicone self-repairing antifouling material.

Embodiment 3

[0031] The process of preparing the silicone self-repairing antifouling material according to the present embodiment is:

[0032] (1) 0.5 g of melamine and mass percentage concentration of 25% were added to the three flask, and magnetically stirred at 20 ° C for 2 h;

[0033] The amino content of melamine is 1.2 × 10 -2 Mol, the mass of xenzophenylene is aldehyde is 1.62 g, and the aldehyde group in aqueous xenobenzene trihyde is 3.0 × 10 -2 MOL, the molar ratio of the amino functional group and the aldehyde functional group is 0.4;

[0034] (2) PDMS and 10 ml of tetrahydrofuran were added 90.0 g of a molecular weight of 7000 g / mol to the three flasks of step (1);

[0035] (3) At a water bath condition at 25 ° C, the three flask of the magnetic stirring step (2) for 3 h, resulting in the silicone self-repairing antifouling material.

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Abstract

The invention belongs to the technical field of preparation of marine engineering antifouling coatings, and relates to a method for preparing organic silicon self-repairing antifouling materials. Firstly, melamine and an aqueous solution containing dialdehyde or polyaldehyde compounds are added to a three-necked flask, and heated at 0-30°C Under the condition of magnetic stirring for 0.5-3h; then add amino-terminated polydimethylsiloxane and organic solvent into the three-necked flask; finally, under the condition of 0-60°C water bath, magnetically stir the three-necked flask for 0.5-8h to obtain organic Silicon self-healing antifouling material, providing a self-healing antifouling material preparation method based on amino-terminated polydimethylsiloxane and melamine cross-linked by dialdehyde or polyaldehyde compounds, which can effectively improve the release of organic silicon fouling The antifouling effect of the material overcomes the poor mechanical properties of silicone antifouling materials, and is prone to damage caused by marine sediment and marine organisms during use, thereby shortening the service life of silicone antifouling materials. ,with broadly application foreground.

Description

Technical field: [0001] According to the field of ocean engineering antifouling coating, it is specifically involved in the preparation of silicone self-repairing antifouling material, based on amino-terminating polydimethylsiloxane (PDMS) and melamine crosslinking through a bialdehydelated compound Self-repairing antifouling material to extend the antifouling of the silicone antifouling coating. Background technique: [0002] In the marine environment, painting antifouling coatings are currently the most effective anti-fouling measures of marine facilities. Soil-based releaseless coatings based on silicone resin are main body materials are definitive by low surface energy such as coating surface, without killing agents, and materials are almost unable to consume, with environmentally friendly and long-term anti-fouling. The potential is the research hotspot and important development direction of ship long-term anti-fouling materials. The quaternary ammonium salt-modified silicon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/24C09D183/08C09D5/16
CPCC08J3/24C08J2383/08C09D5/1675C09D183/08
Inventor 孙智勇陈光孟蔺存国张金伟
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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