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A kind of antifouling coating and its using method and application

An antifouling coating and reaction technology, applied in antifouling/underwater coatings, polyurea/polyurethane coatings, coatings, etc., can solve problems such as wear resistance needs to be improved

Active Publication Date: 2022-04-22
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 the polyoxypropylene glycol (PPG) type isocyanate prepolymer preferably comprises the following steps:

[0033] The polyoxypropylene glycol (PPG) and isophorone diisocyanate were mixed to perform the first prepolymerization reaction to obtain a polyoxypropylene glycol isocyanate prepolymer.

[0034] In the present invention, the weight average molecular weight of the polypropylene oxide glycol is preferably 2000 ~ 3000. In the present invention, the mass ratio of the polyoxypropylene glycol and isophorone diisocyanate is preferably (180~ 300) :(65.1~ 137.9), further preferably 240: 110.

[0035] In the present invention, the isophorone diisocyanate is preferably added dropwise; the rate of drop addition is preferably 1.2 to 2.4mL / min. In the present invention, the drop addition is preferably carried out under conditions of stirring and heating of polypropylene glycol; the heating temperature is preferably 50±5 ° C.

[003...

Embodiment 1

[0064]An antifouling coating, comprising a separately packed component A and component B, wherein component A comprises an isocyanate prepolymer, the isocyanate prepolymer comprises a polyoxypropylene glycol (PPG) type isocyanate prepolymer and a hydroxypropyl silicone oil (PDMS) type isocyanate prepolymer;

[0065] The preparation method of PPG type isocyanate prepolymer is as follows: the dehydrated 240 parts of polyoxypropylene diol (weight average molecular weight of 3000) is added to the reaction device, and 110 parts of isoferone diisocyanate (IPDI) is added dropwise under the stirring of 50 ±5 °C, and the temperature is heated to 80 ~ 85 ° C after mixing uniformly, and the PPG type isocyanate prepolymer is made after 2.5 hours of reaction.

[0066] The preparation method of PDMS type isocyanate prepolymer is as follows: 60 parts of hydroxypropyl dimethicone (heavy average molecular weight 2000) after dehydration is added to the reaction device, 30.6 parts of isophorone dii...

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] According to the manner of Example 1 performance test, the result is: wear loss weight rate of 0.48%.

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Abstract

The invention belongs to the technical field of marine antifouling coatings and provides an antifouling coating as well as its use method and application. The polyaspartic acid ester in the antifouling coating of the present invention is a kind of isocyanate curing agent containing secondary amine structure, and the ester group and aliphatic characteristic contained in its structure can increase the abrasion resistance of coating, and in A component The combination of the prepolymer containing polyisocyanate can endow the antifouling coating with good toughness and elasticity, so that the formed coating has excellent impact and wear resistance. The hydroxypropyl silicone oil-type isocyanate prepolymer in component A introduces a polydimethylsiloxane structure, which can migrate to the surface of the coating by microphase separation with the polyurea hard segment , reduce the surface energy of the coating, thereby reducing the adhesion between fouling organisms and the interface, and the urea-based structure and excess isocyanate groups that migrate to the bottom can increase the adhesion of the coating through hydrogen bonding and chemical bonding, ensuring its resistance to cleaning and abrasion sex.

Description

Technical field [0001] The present invention relates to the field of marine antifouling coating technology, in particular to an antifouling coating and its use method and application. Background [0002] Marine biological fouling has a very great harm to man-made structures, such as large ships, cross-sea bridges, submarine pipelines, etc., and has a huge impact on the development of the marine industry. The use of marine antifouling coatings can reduce the adhesion of fouled organisms, but traditional anti-fouling coatings contain a large number of heavy metal ions or other toxic substances, resulting in increasingly serious marine environmental and ecological problems. [0003] At present, the relatively environmentally friendly antifouling coatings on the market are mainly divided into self-polishing antifouling coatings and stain release antifouling coatings. Among them, the self-polishing antifouling coating takes zinc acrylate, copper acrylate, silane acrylate copolymer re...

Claims

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Application Information

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Patent Type & Authority Patents(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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