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Antirust pigment for cathode electrophoretic paint and slurry preparation method thereof

A cathodic electrophoretic coating and anti-rust pigment technology, applied in the direction of electrophoretic coating, anti-corrosion coating, coating, etc., to achieve the effect of low solubility

Active Publication Date: 2020-09-11
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still a lack of antirust pigments that are specially suitable for cathodic electrophoretic coatings.

Method used

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  • Antirust pigment for cathode electrophoretic paint and slurry preparation method thereof
  • Antirust pigment for cathode electrophoretic paint and slurry preparation method thereof
  • Antirust pigment for cathode electrophoretic paint and slurry preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weighed 0.03 mol of hexamethylene diamine tetramethylene phosphonic acid and 0.08 mol of cerium nitrate were added into water for dissolution. Use NaOH solution to adjust the pH of the hexamethylenediamine tetramethylene phosphonic acid solution to 7, pour the hexamethylene diamine tetramethylene phosphonic acid and the cerium nitrate solution into a disperser and stir to make them fully mixed. The mixture was left to stand, filtered, and the precipitate was first washed with deionized water and then washed with deionized water to eliminate possible excess inorganic salt ions. Gained precipitation is adjusted to solid content 20% with deionized water, adds 0.1% polyethyleneimine, 0.1% hydroxyethyl cellulose, grinds 1 hour, obtains antirust pigment slurry (gained antirust pigment See in description figure 1 ).

Embodiment 2

[0031] 1.5 mol of sodium ethylenediamine tetramethylene phosphonate and 4 mol of lanthanum nitrate were weighed and added to water for dissolution. The pH of sodium ethylenediaminetetramethylenephosphonate was adjusted to 4 with dilute hydrochloric acid solution. The pH of the hexamethylenediaminetetramethylenephosphonic acid solution was adjusted to 4 with dilute hydrochloric acid solution, and the sodium ethylenediaminetetramethylenephosphonate and lanthanum chloride solutions were poured into a disperser and stirred to make them fully mixed. The mixture was left to stand, filtered, and the precipitate was first washed with deionized water and then washed with deionized water to eliminate possible excess inorganic salt ions. Gained precipitation is adjusted to solid content 30% with deionized water, adds 0.1% polyethyleneimine, 0.1% hydroxyethyl cellulose, grinds 1 hour, obtains antirust pigment slurry (gained antirust pigment See in description figure 2 ).

Embodiment 3

[0033] 0.6 mol of diethylenetriaminepentamethylenephosphonic acid and 1 mol of lanthanum nitrate were weighed and added to water for dissolution. Use KOH solution to adjust the pH of diethylenetriaminepentamethylenephosphonic acid to 5, pour the solution of diethylenetriaminepentamethylenephosphonic acid and lanthanum nitrate into a disperser and stir to make them fully mixed. The mixture was left to stand, filtered, and the precipitate was first washed with deionized water and then washed with deionized water to eliminate possible excess inorganic salt ions. Gained precipitation is adjusted to solid content 30% with deionized water, adds 0.1% polyethyleneimine, 0.1% hydroxyethyl cellulose, grinds 1 hour, obtains antirust pigment slurry (gained antirust pigment See in description image 3 ).

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PUM

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Abstract

The invention discloses an antirust pigment for cathode electrophoretic paint and a slurry preparation method of the antirust pigment, the antirust pigment is composed of phosphonic acid anions and rare earth cations, and the phosphonic acid anions are one or a mixture of hexamethylenediamine tetramethylene phosphonic acid radicals, diethylenetriamine pentamethylene phosphonic acid radicals and ethylenediamine tetramethylene phosphonic acid radicals; the rare earth cations are one or a mixture of Ce3+ and La3+. The antirust pigment has proper solubility at 25 DEG C, has a good antirust effect,and does not destroy the stability of the cathode electrophoretic paint emulsion. The invention also discloses a preparation method of the antirust pigment slurry. The obtained antirust pigment slurry can be effectively co-deposited with cathode electrophoretic paint.

Description

technical field [0001] The invention belongs to the technical field of antirust pigments, and in particular relates to an antirust pigment for cathodic electrophoretic coatings and a preparation method for slurry thereof. Background technique [0002] Cathodic electrophoretic coating is an important coating variety. With the continuous development of technology and the continuous expansion of application fields, the requirements for the anti-corrosion performance of electrophoretic coatings are getting higher and higher. Adding anti-rust pigments is an important means to enhance the anti-corrosion performance of coatings. However, the addition of general anti-rust pigments will significantly increase the conductivity of the electrophoretic paint, destroy the stability of the electrophoretic paint emulsion, and affect the performance of the paint film. In addition to traditional antirust pigments such as red lead and zinc chrome yellow, although their antirust effect is good...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/44C09D5/08
CPCC09D5/08C09D5/4492
Inventor 彭叔森冯亚琳陈星云陶烨寅
Owner NANCHANG HANGKONG UNIVERSITY
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