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Antifouling coating as well as use method and application thereof

An antifouling paint and reaction technology, applied in antifouling/underwater paints, polyurea/polyurethane paints, coatings, etc., can solve problems such as the need to improve wear resistance

Active Publication Date: 2022-01-04
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantages of fouling release antifouling coatings are environmental protection and weak adhesion to biological surfaces; however, the wear resistance of fouling releasing antifouling coatings needs to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032] In the present invention, the preparation method of described polyoxypropylene glycol (PPG) type isocyanate prepolymer preferably comprises the following steps:

[0033] Mixing polyoxypropylene glycol (PPG) and isophorone diisocyanate to perform a first prepolymerization reaction to obtain a polyoxypropylene glycol type isocyanate prepolymer.

[0034] In the present invention, the weight average molecular weight of the polyoxypropylene diol is preferably 2000-3000. In the present invention, the mass ratio of the polyoxypropylene diol to isophorone diisocyanate is preferably (180-300):(65.1-137.9), more preferably 240:110.

[0035] In the present invention, the method of adding the isophorone diisocyanate is preferably dropwise; the rate of the dropwise addition is preferably 1.2-2.4 mL / min. In the present invention, the dropping is preferably carried out under the condition of stirring and heating the polyoxypropylene diol; the heating temperature is preferably 50±5°C....

Embodiment 1

[0064] A kind of antifouling paint, comprises A component and B component of independent packaging, wherein A component comprises isocyanate prepolymer, and described isocyanate prepolymer comprises polyoxypropylene glycol (PPG) type isocyanate prepolymer and Hydroxypropyl silicone oil (PDMS) type isocyanate prepolymer;

[0065] The preparation method of the PPG type isocyanate prepolymer is as follows: add 240 parts by weight of polyoxypropylene diol (weight average molecular weight: 3000) after dehydration into the reaction device, and add 110 parts by weight of isocyanate dropwise under stirring at 50±5°C Alone diisocyanate (IPDI), mixed evenly, heated to 80-85°C, and reacted for 2.5 hours to make a PPG type isocyanate prepolymer.

[0066] The preparation method of PDMS-type isocyanate prepolymer is as follows: Add 60 parts of dehydrated hydroxypropyl polydimethylsiloxane (weight average molecular weight 2000) into the reaction device, add 30.6 parts of isofor under stirrin...

Embodiment 2

[0073] The difference from Example 1 is: adding 8 parts of PPG type isocyanate prepolymer and 2 parts of PDMS type isocyanate prepolymer.

[0074] The performance test was carried out in the manner of Example 1, and the result was: the abrasion weight loss rate was 0.48%.

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PUM

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Abstract

The invention belongs to the technical field of marine antifouling coatings, and provides an antifouling coating as well as a use method and application thereof. Polyaspartic acid ester in the antifouling coating is an isocyanate curing agent containing a secondary amine structure, the abrasion resistance of a coating layer can be improved through ester groups and aliphatic series characteristics contained in the structure of the polyaspartic acid ester, and the antifouling coating can be endowed with good toughness and elasticity by combining the polyaspartic acid ester with the prepolymer containing polyisocyanate in a component A, and a formed coating layer has excellent impact resistance and wear resistance. A polydimethylsiloxane structure is introduced into a hydroxypropyl silicone oil type isocyanate prepolymer in the component A, and the polydimethylsiloxane structure can generate a microphase separation effect with a polyurea hard segment and migrate to the surface of the coating layer, so that the surface energy of the coating is reduced, and the adhesive force between fouling organisms and an interface is reduced; and the adhesive force of the coating layer can be increased through hydrogen bonds and chemical bonds by a ureido structure and redundant isocyanate groups migrated to the bottom, so that the cleaning resistance and the wear resistance of the coating are guaranteed.

Description

technical field [0001] The invention relates to the technical field of marine antifouling coatings, in particular to an antifouling coating and its use and application. Background technique [0002] Marine biofouling is very harmful to man-made structures, such as large ships, cross-sea bridges, and submarine pipelines, and has a huge impact on the development of the marine industry. The use of marine antifouling coatings can reduce the adhesion of fouling organisms, but traditional antifouling coatings contain a large amount of heavy metal ions or other toxic substances, leading to increasingly serious marine environmental and ecological problems. [0003] At present, relatively environmentally friendly antifouling coatings on the market are mainly divided into self-polishing antifouling coatings and fouling-releasing antifouling coatings. Among them, the self-polishing antifouling coating uses zinc acrylate, copper acrylate, and silyl acrylate copolymer resin as the matri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/02C09D5/16C08G18/48C08G18/61
CPCC09D175/02C09D5/1637C09D5/1675C08G18/4825C08G18/61C08L79/00
Inventor 陈蓉蓉张书瑞王昊天刘培礼朱佳慧刘婧媛于静刘琦王君
Owner HARBIN ENG UNIV
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