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Polythiophene modified cold zinc coating and preparation method thereof

A technology of polythiophene and cold coating of zinc, which is applied in the direction of anti-corrosion coatings, coatings, etc., can solve the problems of short cathodic protection time and achieve the effects of improving corrosion protection, increasing dispersibility, and improving storage stability

Active Publication Date: 2019-10-11
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the shortcoming of short cathodic protection time in existing cold-coated zinc coatings, the object of the present invention is to provide a polythiophene modified cold-coated zinc coating and a preparation method thereof, which can significantly improve the cathodic protection of cold-coated zinc coatings

Method used

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  • Polythiophene modified cold zinc coating and preparation method thereof
  • Polythiophene modified cold zinc coating and preparation method thereof
  • Polythiophene modified cold zinc coating and preparation method thereof

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preparation example Construction

[0026] The preparation method of the polythiophene modified cold coating zinc coating of the present invention is carried out in the following order and steps:

[0027] (1) Preparation of modified zinc powder

[0028] Add solvent into the reaction kettle, add 0.5% to 20% polythiophene aqueous solution of the solvent mass in the stirring state, then add zinc powder according to 10% to 70% of the solvent mass, heat to 20°C to 50°C, and react for 0.5h to 3h ; After the reactant is centrifuged, take out the powder, rinse it with a solvent for 2 to 5 times, then dry it at a temperature of 40°C to 70°C for 10h to 24h, and then grind it into powder to make modified zinc powder;

[0029] (2) Add acrylic resin, solvent, and additives to the reaction kettle in sequence, and disperse at 300rpm-1000rpm for 15-50min; then slowly add modified zinc powder, disperse at 300rpm-1000rpm for 30min-100min, filter and discharge , made of polythiophene modified cold coating zinc paint.

Embodiment 1

[0032] In this embodiment, deionized water is added to the reaction kettle, and 1% poly(3,4-ethylenedioxythiophene) aqueous solution doped with deionized water quality is added in a stirring state, and then Add zinc powder according to 40% of the mass of deionized water, heat to 30°C, and react for 1h; Powder, made into modified zinc powder;

[0033] Add 166.7kg acrylic resin, 200kg toluene, 0.4kg Disperbyk-140 dispersant, 0.5kg BYK-055 defoamer, 0.4kg EFKA 3600N leveling agent, 0.4kg BENTONE 52 anti-settling agent into the reaction kettle in sequence, at 700rpm Disperse at rotating speed for 20min; then slowly add 833.3kg of modified zinc powder, disperse at 1200rpm for 70min, filter and discharge to make poly(3,4-ethylenedioxythiophene) modified polystyrene sulfonate doped Cold-dip galvanized paint.

Embodiment 2

[0035] In this embodiment, add deionized water to the reaction kettle, add 8% poly(3,4-ethylenedioxythiophene) aqueous solution doped with sodium polystyrene sulfonate with deionized water quality in a stirred state, and then Add zinc powder according to 40% of the mass of deionized water, heat to 30°C, and react for 1h; Powder, made into modified zinc powder;

[0036] Add 166.7kg acrylic resin, 200kg toluene, 0.4kg Disperbyk-140 dispersant, 0.5kg BYK-055 defoamer, 0.4kg EFKA 3600N leveling agent, 0.4kg BENTONE 52 anti-settling agent into the reaction kettle in sequence, at 700rpm Disperse at a rotating speed for 20min; then slowly add 833.3kg of modified zinc powder, disperse at 1200rpm for 70min, and discharge after filtration to make poly(3,4-ethylenedioxythiophene) cold water doped with polystyrene sulfonate sodium. Galvanized paint.

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Abstract

The invention relates to a polythiophene modified cold zinc coating and a preparation method thereof, and belongs to the field of coating. The polythiophene modified cold zinc coating comprises, by mass, 2-30 parts of acrylic resin, 0.1-6 parts of addition agents, 70-98 parts of zinc powder and 2-60 parts of solvent, wherein the zinc powder is modified by polythiophene. By modifying the zinc powder with an aqueous polythiophene solution, cathode protection time of the coating can be prolonged, and corrosion resistance of the coating can be improved. The polythiophene modified cold zinc coatingcan be widely applied to corrosion prevention engineering of steel structures, and can easily and quickly solve corrosion protection problems of power transmission and transformation facilities, high-speed railway facilities, highway facilities and the like.

Description

technical field [0001] The invention relates to a polythiophene modified cold coating zinc coating and a preparation method thereof, belonging to the field of coatings. Background technique [0002] Cold-applied zinc paint has a high solid content, which belongs to high-solid paint and is an environmentally friendly paint. The content of zinc powder in the cold-coated zinc coating is over 95%. The high-content zinc powder plays a cathodic protection role on the steel substrate in the coating and protects the steel from corrosion. Therefore, how to prolong the cathodic protection effect of zinc powder is directly related to the protection period of cold-coated zinc coating. Many researchers have done a lot of research in this area, but with little success. Bastos [Progress in Organic Coatings, 63 (2008) 282-290; Progress in Organic Coatings, 69 (2010) 184-192.] et al. select corrosion inhibitors such as cerium nitrate, lanthanum nitrate, and benzotriazole to carry out zinc ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D7/65C09D5/10
CPCC09D1/00C09D5/106C09D7/65
Inventor 刘福春韩恩厚
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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