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Preparation method of antibacterial low-surface energy modified polyurethane antifouling coating agent

An antifouling coating and low surface energy technology, applied in antifouling/underwater coatings, coatings, paints containing biocide, etc., can solve the problems of poor mechanical properties and poor compatibility of polysiloxane, and achieve Good wear resistance, simple method and fast film formation

Active Publication Date: 2014-04-02
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If polysiloxane can be combined with polyurethane, it will not only effectively improve the water resistance and weather resistance of polyurethane, but also overcome the shortcomings of polysiloxane's poor mechanical properties.
However, due to the poor compatibility of silicone and polyurethane, it is generally necessary to provide a third component to improve

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0016] A kind of preparation method of antibacterial type low surface energy modified polyurethane antifouling coating agent of the present invention, comprises the following steps:

[0017] 1. Dissolve 0.5-1.5 parts by weight of initiator in 10-30 parts by weight of organic solvent, preheat to 55°C-95°C to obtain the first solution;

[0018] 2. Mix 10-50 parts by weight of monomers containing capsaicin functional groups, 10-50 parts by weight of polysiloxane-modified acrylates, 20-70 parts by weight of hydrocarbon chain acrylate monomers, 20-70 parts by weight of Acrylate monomer, 1.5-4.5 parts by weight of initiator and 0.5-6 parts by weight of chain transfer agent are dissolved in 20-90 parts by weight of organic solvent to obtain a second solution, which is slowly added dropwise to the first In the solution, the rate of addition is controlled to be 0.5-2mL / s; after adding, keep warm for 4-6 hours, add 0.5-1.5 parts by weight of initiator, raise the temperature to 65°C-105°...

Embodiment 1

[0035] (1) Dissolve 0.5g of 2,2’-azobisisobutyronitrile in 10g of butyl acetate and preheat to 55°C to obtain the first solution;

[0036] (2) 10g monomer containing capsaicin functional group , 10g polysiloxane modified acrylate , 20g methyl methacrylate, 20g hydroxyethyl methacrylate, 1.5g 2,2'-azobisisobutyronitrile and 0.5g dodecyl mercaptan were dissolved in 20g butyl acetate to obtain a second solution , slowly drop the second solution into the first solution, and control the dropping rate to 0.5mL / s; after the addition, keep warm for 4 hours, add 0.5g 2,2'-azobisisobutyronitrile, and raise the temperature to 105°C , kept for 4h to obtain a silicone-modified acrylate resin solution containing hydroxyl and capsaicin functional groups;

[0037] (3) Take the silicone-modified acrylate resin solution containing hydroxyl and capsaicin functional groups obtained in step (2), butyl acetate, polytetrafluoroethylene micropowder, and dibutyltin dilaurate in a weight ratio of 7...

Embodiment 2

[0039] (1) Dissolve 0.5g of 2,2’-azobisisobutyronitrile in 10g of ethylene glycol ethyl ether acetate, preheat to 55°C to obtain the first solution;

[0040] (2) 10g monomer containing capsaicin functional group , 30g polysiloxane modified acrylate , 20g methyl acrylate, 20g butyl acrylate, 40g hydroxyethyl acrylate, 3g 2,2'-azobisisobutyronitrile and 3g dodecyl mercaptan were dissolved in 60g ethylene glycol ethyl ether acetate to obtain the first For the second solution, slowly add the second solution dropwise to the first solution, and control the dropping rate to 1mL / s; after the addition, keep it warm for 6 hours, add 1g of 2,2'-azobisisobutyronitrile, and raise the temperature to 105°C , kept for 4h to obtain a silicone-modified acrylate resin solution containing hydroxyl and capsaicin functional groups;

[0041] (3) Take the silicone-modified acrylate resin solution containing hydroxyl and capsaicin functional groups obtained in step (2), ethylene glycol ether aceta...

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Abstract

The invention relates to a preparation method of an antibacterial low-surface energy modified polyurethane antifouling coating agent. The method comprises the steps of performing a free radical polymerization reaction between a monomer containing a capsaicin functional group and polysiloxane modified acrylate, a hydrocarbon-chain acrylate monomer and a hydroxyl-containing acrylate monomer to obtain organic silicone modified acrylate resin containing hydroxyl and capsaicin functional group; finally, uniformly mixing and stirring the resin and a polyisocyanate curing agent proportionally, and crosslinking and curing to obtain an antibacterial low-surface energy modified polyurethane antifouling coating agent. By adopting the method provided by the invention, the prepared low-surface energy modified polyurethane antifouling coating agent combines double effects of low surface energy and antibacterial function; moreover, a crosslinking and curing mode controllable at room temperature is provided, and the practical application value is good. The antifouling coating agent is used as a marine antifouling paint which can inhibit the adsorption of marine organisms and kill the microorganisms adsorbed to the hull surface through the capsaicin functional group.

Description

technical field [0001] The invention relates to an antifouling coating agent and a preparation method thereof, in particular to a preparation method of an antibacterial low surface energy modified polyurethane antifouling coating agent having both low surface energy and bactericidal properties. Background technique [0002] Vessels or underwater equipment in the ocean will be fouled by marine organisms, which will have a negative impact on their performance and service life. The methods to solve marine biofouling include mechanical removal, underwater cleaning, and application of marine antifouling coatings, among which the most effective and convenient method is to apply marine antifouling coatings. [0003] At present, marine antifouling coatings can achieve antifouling effect mainly through two methods, one is poisonous killing, which directly kills the marine organisms adsorbed on the surface through toxic substances, and the other is low surface energy, which prevents m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D151/08C09D7/12C09D5/16C08F290/06C08F220/58C08F220/14C08F220/28C08F220/16C08F2/38C08F4/04C08F4/34
Inventor 詹晓力陈曦刘海龙张庆华陈丰秋
Owner ZHEJIANG UNIV
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