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A kind of antifouling coating material and its preparation method and application

An antifouling coating and antifouling technology, applied in antifouling/underwater coatings, coatings, polyurea/polyurethane coatings, etc. The effect of anti-fouling performance can not be considered, low elastic modulus, and broad application prospects

Active Publication Date: 2021-07-30
NAT INNOVATION INST OF DEFENSE TECH PLA ACAD OF MILITARY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the object of the present invention is to overcome the defect of existing low surface energy antifouling coatings, that is, the shortcoming that the mechanical properties and antifouling properties of organic silicon antifouling materials cannot be taken into account, and provide a novel flexible low surface energy antifouling material system, The system is based on multiple physical cross-linking effects, through the condensation polymerization of diamino-terminated PDMS and diisocyanate, ureido groups are introduced into the PDMS macromolecular skeleton, and the copolymerization product PDMS-PUa and PTFE nanoparticles are blended and cured to obtain Anti-fouling coating material, the coating material can be applied to the substrate to obtain anti-fouling material

Method used

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  • A kind of antifouling coating material and its preparation method and application
  • A kind of antifouling coating material and its preparation method and application
  • A kind of antifouling coating material and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Preparation of low surface energy antifouling materials based on multiple physical crosslinking:

[0045] (1) Add 30.00 g of bisamino-terminated PDMS (molecular weight ~ 3000 g / mol) and 45 ml of tetrahydrofuran into a three-necked flask, seal it, place it in a water bath at 25 °C, pass nitrogen gas for 10 min, and stir magnetically at 300 rpm for 30 min.

[0046] (2) Dissolve 1.68 g of hexamethylene diisocyanate in 5 ml of tetrahydrofuran, and add it dropwise to the three-necked flask in step (1), pass nitrogen gas in a water bath at 25°C for 10 min, and stir magnetically at 300 rpm for 24 h.

[0047] The reaction equation for the copolymerization of double-blocked PDMS and hexamethylene diisocyanate is as follows: figure 1 Shown, wherein R is a hexamethylene group. The molar concentration of diamino-terminated PDMS in the solution is 0.2mol / L, the molar concentration of hexamethylene diisocyanate is 0.2mol / L, and the molar ratio of amino groups to isocyanate groups is...

Embodiment 2

[0055] Preparation of low surface energy antifouling materials based on multiple physical crosslinking:

[0056] (1) Add 30.00 g of bisamino-terminated PDMS (molecular weight ~ 3000 g / mol) and 45 ml of tetrahydrofuran into a three-necked flask, seal it, place it in a water bath at 25 °C, pass nitrogen gas for 10 min, and stir magnetically at 300 rpm for 30 min.

[0057] (2) 1.68g of hexamethylene diisocyanate (HDI) was dissolved in 5ml of tetrahydrofuran, and added dropwise to the three-necked flask of step (1), nitrogen gas flowed in a water bath at 25°C for 10min, and magnetic stirring at 300rpm for 24h.

[0058] The reaction equation for the copolymerization of double-blocked PDMS and hexamethylene diisocyanate is as follows: figure 1 Shown, wherein R is a hexamethylene group. The molar concentration of diamino-terminated PDMS in the solution is 0.2mol / L, the molar concentration of hexamethylene diisocyanate is 0.2mol / L, and the molar ratio of amino groups to isocyanate gr...

Embodiment 3

[0066] Preparation of low surface energy antifouling materials based on multiple physical crosslinking:

[0067](1) Add 30.00 g of bisamino-terminated PDMS (molecular weight ~ 3000 g / mol) and 45 ml of tetrahydrofuran into a three-necked flask, seal it, place it in a water bath at 25 °C, pass nitrogen gas for 10 min, and stir magnetically at 300 rpm for 30 min.

[0068] (2) 1.68g of hexamethylene diisocyanate (HDI) was dissolved in 5ml of tetrahydrofuran, and added dropwise to the three-necked flask of step (1), nitrogen gas flowed in a water bath at 25°C for 10min, and magnetic stirring at 300rpm for 24h.

[0069] The reaction equation for the copolymerization of double-blocked PDMS and hexamethylene diisocyanate is as follows: figure 1 Shown, wherein R is a hexamethylene group. The molar concentration of diamino-terminated PDMS in the solution is 0.2mol / L, the molar concentration of hexamethylene diisocyanate is 0.2mol / L, and the molar ratio of amino groups to isocyanate gro...

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Abstract

The present invention provides a kind of antifouling coating material and its preparation method and application, the raw material of described coating material comprises PDMS-PUa, PTFE nano particle, organic solvent A, it is dispersed in the PTFE dispersion liquid in the organic solvent A and PDMS‑PUa mixed and crosslinked. The antifouling coating material of the present invention and the antifouling material prepared therefrom have better flexibility and fluidity, a glossy surface and a lower elastic modulus, and take into account the antifouling performance while ensuring good mechanical properties. It has a certain self-healing performance, can prolong the service life of antifouling materials, and achieve the purpose of durable and efficient antifouling, and has broad application prospects.

Description

technical field [0001] The invention relates to the technical field of marine antifouling materials, in particular to an antifouling coating material and its preparation method and application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Ships and offshore platforms serving in the complex and harsh marine environment have long been seriously harmed by marine biofouling. Antifouling coatings are currently the most effective, economical, and widely applicable antifouling strategies. Among them, low surface energy antifouling materials made of silicone resin or fluoropolymer can effectively prevent the attachment of marine fouling organisms, and weak water flow or simple...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/02C09D127/18C09D5/16C09D7/65C08G18/61
CPCC08G18/61C08L2312/00C09D5/1687C09D175/02C08L27/18
Inventor 崔辛梁秀兵胡振峰孔令超王桂龙
Owner NAT INNOVATION INST OF DEFENSE TECH PLA ACAD OF MILITARY SCI
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