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Bromopyrrole nitrile grafted silicone hydrogel for ultra-lubricious non-stick antifouling coatings

A technology of bromopyrrole nitrile and silicone hydrogel, which is applied in antifouling/underwater coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems that antifouling agents affect human health and ecological safety, and achieve Good scratch resistance, improved adhesion and mechanical strength, improved antifouling performance

Active Publication Date: 2022-03-22
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, copper-containing substances and antifouling agents in coatings can still affect human health and ecological security through food chain enrichment

Method used

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  • Bromopyrrole nitrile grafted silicone hydrogel for ultra-lubricious non-stick antifouling coatings
  • Bromopyrrole nitrile grafted silicone hydrogel for ultra-lubricious non-stick antifouling coatings
  • Bromopyrrole nitrile grafted silicone hydrogel for ultra-lubricious non-stick antifouling coatings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: Synthesis of siloxane-terminated polyurethane (siloxane-terminated PU)

[0027] Add 300g dry xylene, 60g hydrogenated phenylmethane diisocyanate (H12MDI), 80g hydroxyalkyl Polysiloxane (hydroxyalkyl silicone oil), 160g polyether polyol (molecular weight 1000), 0.4g di-n-butyltin dilaurate (DBTDL), heat up to 100°C, react for 2h, cool down to 55°C, add 2g butanediol Ketoxime, continue to react until the system is completely uniform and transparent, then raise the temperature to 65°C, add dry 4g hexanediol to extend the chain, continue the reaction, use di-n-butylamine titration to measure the content of NCO groups in the system, and reach the theoretical After the value, cool down to 35°C, add 6.6g aminopropyltriethoxysilane, react for 0.5h, after cooling to room temperature, add an appropriate amount of dry xylene and dilute to a solid content of 50% to obtain a siloxane-terminated polyurethane ( Silicone-terminated PU).

Embodiment 2

[0028] Embodiment 2: the synthesis of PEG modified curing agent (curing agent 1)

[0029] Add 25g of hydrogen-containing silicone oil (0.8% hydrogen content) into a four-necked flask equipped with a stirrer, reflux condenser, constant pressure dropping funnel, and thermometer, raise the temperature to 80°C, and then weigh allyl polyethylene glycol Ether 55g (molecular weight ≥ 350), use a pipette gun to absorb 20μm Karstedt catalyst, configure it into a uniform mixed solution, add dropwise after 1 hour, continue to react for 3 hours, cool down to room temperature, and then weigh 4.5g of styrene-butadiene resin , after fully swelling and dissolving with 50g xylene, quickly drop it through the constant pressure dropping funnel, after the completion, react for 1 hour, add 2.5g vinyltriethoxysilane dropwise, react for 3h, prepare PEG modified after cooling silicone resin curing agent.

Embodiment 3

[0030] Embodiment 3: the synthesis of bromopyrrole nitrile modified short-chain curing agent (short-chain curing agent 2)

[0031] Add 18.6g of isocyanatopropyltriethoxysilane, 100g of dry ethyl acetate and 25g of bromine For pyrrole nitrile, heat up to 45° C. and react for 4 hours, remove 70 g of ethyl acetate under vacuum, and add 13.6 g of xylene to obtain a short-chain curing agent modified by bromopyrrole nitrile.

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Abstract

The invention relates to antifouling paint technology and aims to provide a super lubricating and non-adherent antifouling paint with bromopyrrole nitrile grafted silicone hydrogel. The antifouling coating is composed of A component and B component; A component contains hydroxyl silicone oil, gas phase SiO 2 , silicone-terminated polyurethane, diphenyldiethoxysilane, octamethylcyclotetrasiloxane, talc, iron oxide red, zinc octoate, glass fiber, polyamide, and xylene; PEG modified curing agent, bromopyrrole nitrile modified short chain curing agent, dibutyltin diacetate, butyl acetate, methyl ethyl ketone and xylene. In the present invention, the cross-linking reaction is used to realize the chemical grafting of bromopyrrole nitrile on the side chain of the silicone resin, and at the same time, the interlayer adhesion of the resin is improved; the multi-component structure is used to enhance its hydrophilicity without losing mechanical properties, The hydrophilic inhibitory group and bromopyrrole nitrile synergistically antifouling, improve the antifouling performance of the coating. Siloxane-terminated polyurethane further improves the adhesion and mechanical strength of the coating.

Description

technical field [0001] The invention relates to antifouling paint technology, in particular to a super lubricating and non-adherent antifouling paint grafted with bromopyrrole nitrile grafted silicone hydrogel. Background technique [0002] Marine biofouling refers to the biofouling formed by the adsorption, growth and reproduction of marine microorganisms, plants and animals on the surface of ships and marine facilities, which brings many disadvantages to human beings engaged in marine activities. Worldwide, the application of antifouling coatings is the most effective and economical means of dealing with biofouling. Organotin (TBT) antifouling paint, which used to be a special weapon, was banned globally in 2008 because of its huge harm to the ecological environment. In the post-TBT era, copper-containing antifouling coatings are the most compelling. However, copper-containing substances and antifouling agents in coatings can still affect human health and ecological secu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/04C09D175/04C09D5/16C09D7/61C09D7/63C09D7/65C08J3/075C08G81/02C08G77/46
CPCC09D183/04C09D5/1687C09D5/1675C08J3/075C08G81/025C08G77/46C08J2383/04C08J2475/04C08L75/04C08L87/005C08K13/04C08K7/14C08K7/26C08K5/544C08K5/098
Inventor 胡建坤张庆华詹晓力
Owner ZHEJIANG UNIV