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Antifouling coating as well as preparation method and application thereof

A technology of antifouling coatings and tapioca starch, which is applied in the field of coatings, can solve the problems of no application, no technical guidance and technical effects, unfavorable starch stability, etc., and achieve the effects of excellent performance, good thixotropy, and excellent covering ability

Inactive Publication Date: 2020-04-14
GUANGXI TEACHERS EDUCATION UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Starch is an environmentally friendly and easy-to-degrade natural polymer, but there are obvious problems when starch replaces the base resin system: there are a large number of hydrophilic groups (hydroxyl groups) in the molecular structure of starch, which are easily soluble in water, which is not conducive to starch Stable existence on the ship substrate; starch is mainly used in the food industry, and hydrophobically modified starch is more widely used in the food industry, and can be used as a thickener, enhancer, etc., but has not been used in ship-based antifouling coatings. No technical guidance and predictable technical effects

Method used

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  • Antifouling coating as well as preparation method and application thereof
  • Antifouling coating as well as preparation method and application thereof

Examples

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preparation example Construction

[0064] The present invention also provides a preparation method for the antifouling coating described in the above technical solution, comprising the following steps:

[0065] The solvent and the acrylic resin are first mixed to obtain a resin solution;

[0066] The obtained resin solution is mixed with the remaining raw materials for the second time to obtain the antifouling paint.

[0067] In the present invention, the solvent and the acrylic resin are first mixed to obtain a resin solution. In the present invention, the first mixing is preferably performed under stirring conditions; the stirring speed is preferably 250-350 rpm, more preferably 275-325 rpm, and still more preferably 290-310 rpm. In the present invention, the equipment for performing the first mixing is preferably a multi-purpose disc dispersing machine.

[0068] After obtaining the resin solution, the present invention performs second mixing with the obtained resin solution and other raw materials to obtai...

Embodiment 1～4

[0072] The reagents used in Examples 1-4 are all commercially available.

[0073] OSA emulsified modified cassava starch preparation process is:

[0074] Prepare an OSA absolute ethanol solution with a mass fraction of 3%; dry the tapioca starch in an oven at 60°C for 2 hours and take it out, prepare a tapioca starch dispersion with a mass dispersion of 30% with distilled water, and place it in a water bath at 30°C under magnetic stirring Slowly add the dehydrated ethanol solution of OSA into the tapioca starch dispersion under the conditions (the mass ratio of the dehydrated ethanol solution of OSA to the tapioca starch dispersion is 1:1, that is, the mass ratio of OSA to tapioca starch is 1:10); Use a 5% NaOH solution to adjust the pH value of the system to 9; after reacting for 2 hours, use a 4% HCl solution to adjust the pH to neutral, and finally filter the mixed system, wash and filter the solid with absolute ethanol The material was dried several times at room temperat...

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Abstract

The invention belongs to the technical field of coatings, and particularly relates to an antifouling coating as well as a preparation method and application thereof. The antifouling coating provided by the invention comprises the following components in parts by mass: 2-10 parts of octenyl succinic anhydride emulsified and modified cassava starch; 2-10 parts of acrylic resin; 20 to 50 parts of a solvent; 5-15 parts of a slow release agent; 10 to 50 parts of an antifouling agent; 0-3.5 parts of a dispersant and 1-4 parts of a filler. In the invention, the OSA emulsified and modified tapioca starch can be compatible with acrylic resin, so that the cost of the antifouling coating is reduced, and the slow-release degradation performance of the coating is improved. Experimental data shows thatthe antifouling coating provided by the invention has a dry film thickness of 46.45-48.5 [mu] m and a covering rate of 97-98%, has excellent covering capability on a coated surface under the conditionof a low dry film thickness, can efficiently cover the surface of the bottom of a ship and provide an antifouling function, and has excellent use performance and good slow-release degradation performance.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to an antifouling coating and its preparation method and application. Background technique [0002] Marine biofouling is ubiquitous in the marine environment and is a major problem facing the shipping industry. According to research, there are as many as 2,000 species of common marine fouling organisms, the most common of which are algae, hydra, barnacles, oysters, etc. Their attachment leads to an increase in the weight of the hull and sailing friction, an increase in power and fuel consumption, and ocean transportation. The blockage of pipelines and the failure of marine instruments have caused great harm to ships and marine facilities, and seriously hindered the development of marine economy. At present, coating ships with antifouling coatings is still the most economical and effective measure to prevent marine organisms from adhering. Antifouling coatings are coat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/16C09D133/00C09D103/04C09D7/20
CPCC08K2003/2248C08K2003/2296C08L2205/03C09D5/1618C09D103/04C09D133/00C09D7/20C08L3/04C08L93/04C08K3/22C08K3/34C08K3/346C08L33/00
Inventor 李媛媛石燕吹范宝怡
Owner GUANGXI TEACHERS EDUCATION UNIV
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