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Solvent-free marine antifouling coating and preparation method thereof

A marine anti-fouling and solvent-free technology, applied in the field of coatings, can solve problems such as polluting the environment and affecting the health of construction workers, and achieve the effects of low viscosity, excellent mechanical properties, anti-fouling properties, and good solubility.

Inactive Publication Date: 2021-06-11
XIAMEN SUNRUI SHIP COATING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned degradable polyurethane antifouling coatings are all solvent-based antifouling coatings, and organic solvents need to be added to the coatings, because solvent-based coatings will release volatile organic compounds (VOC), pollute the environment and affect the health of construction workers

Method used

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  • Solvent-free marine antifouling coating and preparation method thereof
  • Solvent-free marine antifouling coating and preparation method thereof
  • Solvent-free marine antifouling coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] The degradable polyester polyol in Example 1 is polylactide containing terminal hydroxyl groups, the number average molecular weight is 1000, the pigment and filler are carbon black, and the composite antifouling agent is composed of electrolytic cuprous oxide, copper pyrithione and zinc oxide. The mass ratio is 35:5:5, and the curing agent polyisocyanate is hexamethylene diisocyanate (HDI);

[0040] The preparation method of embodiment 1 is:

[0041] Step 1. Put castor oil and ethylene glycol in a reaction vessel with a material ratio of 1:1.2, fill it with nitrogen, heat up to 120°C, add 0.1% tetrabutyl titanate; heat up to 210°C , after 2 hours of heat preservation, stop feeding nitrogen, and after decompression distillation removes small molecule product and water, cools and discharges and obtains castor oil derivative, and its hydroxyl value is 345mgKOHg -1 , the viscosity is 250mPa·s;

[0042] Step 2. Heat the pigment and filler carbon black at 120°C to remove wat...

Embodiment 2

[0045] The degradable polyester polyol in embodiment 2 is the polycaprolactone that contains terminal hydroxyl, and number average molecular weight is 800, and pigment and filler are iron red, and composite antifouling agent is made of zinc pyrithione, 4-bromo-2-( 4-chlorophenyl)-5-trifluoromethyl-1H-pyrrole-3-carbonitrile and zinc oxide are composed of 5:15:25 by mass ratio, and the curing agent polyisocyanate is polymethylene polyphenylisocyanate (PAPI );

[0046] The preparation method of embodiment 2 is:

[0047] Step 1, castor oil and ethylene glycol are placed in the reaction vessel with a substance ratio of 1:1.2, filled with nitrogen, and after being warmed up to 120°C, add 0.5% of the mixture of sodium methylate and triethanolamine (sodium methylate and The mass ratio of triethanolamine is 0.1:20), the temperature is raised to 220°C, and after 2 hours of heat preservation, the nitrogen gas is stopped, and after the small molecule products and water are removed by dis...

Embodiment 3

[0051] The degradable polyester polyol in Example 3 is polyethylene adipate containing terminal hydroxyl groups, the number average molecular weight is 800, the pigment and filler are composed of barium sulfate and carbon black in a mass ratio of 5:1, and the composite antifouling The agent is composed of 4,5-dichloro-2-n-octyl-3-isothiazolinone, medetomidine and zinc oxide in a mass ratio of 10:10:25, and the curing agent polyisocyanate is toluene diisocyanate (TDI) ;

[0052] The preparation method of embodiment 3 is:

[0053] Step 1. Put castor oil and ethylene glycol in a reaction vessel with a material ratio of 1:1.2, fill it with nitrogen, heat up to 120°C, add 0.04% calcium oxide; heat up to 210°C, and keep it warm for 2 hours , stop feeding nitrogen, after decompression distillation removes small molecule product and water, cools and discharges and obtains castor oil derivative, and its hydroxyl value is 345mgKOHg -1 , the viscosity is 240mPa·s;

[0054] Step 2. Hea...

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Abstract

The invention relates to the technical field of coatings, in particular to a solvent-free marine antifouling coating and a preparation method thereof. The coating comprises a component A and a component B. The component A comprises degradable polyester polyol, a castor oil derivative, a composite antifouling agent, a dewatering agent, a defoaming agent, a dispersing agent and pigment filler; and the component B is a curing agent polyisocyanate. According to the solvent-free marine antifouling coating provided by the invention, due to the introduction of isocyanate and the formation of a net structure in the degradable polyester polyurethane resin, a coating film has excellent adhesive force and impact resistance; meanwhile, due to breakage of ester bonds, the paint film can be slowly degraded, the antifouling agent in the coating is released, and the antifouling effect is good. The degradable polyester polyol is combined with the castor oil derivative, so that the crosslinking density and the crosslinking speed of the coating can be adjusted, the mechanical property of the coating is optimized, the reasonable working life of a coating system is obtained, the viscosity of the coating system can be adjusted and controlled, no organic solvent needs to be added, and the environment-friendly characteristic is achieved.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a solvent-free marine antifouling coating and a preparation method thereof. Background technique [0002] With the development of the marine industry, the problem of marine biofouling has become increasingly prominent. In recent years, degradable polyurethane has been used as a new type of antifouling coating resin in the field of marine antifouling, and the antifouling effect is remarkable. The polyester segment on the degradable polyurethane molecular chain is degraded under the action of seawater to form small molecules, so that the surface of the coating is continuously renewed, and the fouling organisms on the surface are detached, thereby achieving the purpose of antifouling. [0003] For example, the publication number is CN102964557A, the publication date is March 13, 2013, and the patent document entitled "An Antifouling Hydrolytic Degradation Resin and Its Preparation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D5/16
CPCC08K2003/2248C08K2003/2296C09D5/1618C09D5/1625C09D5/1662C09D175/14C08K13/02C08K3/22C08K5/378C08K5/3415C08K5/46C08K5/3445
Inventor 陈珊珊叶章基李春光刘轶龙
Owner XIAMEN SUNRUI SHIP COATING
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