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Aqueous cathodic electrophoresis paint componsistion and its preparation method

A cathodic electrophoretic coating and composition technology, applied in the direction of electrophoretic coatings, etc., can solve the problems of insufficient durability and achieve the effects of reduced paint consumption, excellent electrodeposition stability and storage stability, and good throwing power

Inactive Publication Date: 2004-12-22
李文庄
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] With the increase of air pollution and the requirements of adapting to the north-south climate, the coating film formed by the existing technology is too thin and not durable enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0042] 1. Synthesis of Isocyanate Blockers

[0043] name

regulations

grid

Dosage

(kg)

4.4-Diphenylmethane diisocyanate

Ester

work

industry

289.60

Diethylene glycol butyl ether

work

industry

220.40

methyl isobutyl ketone

work

industry

30.00

[0044] Process: Add isocyanate into a dry and clean reaction kettle equipped with a thermometer, agitator, reflux condenser and high level tank, and put diethylene glycol butyl ether into the high level tank. After stirring and raising the temperature to 45°C, start to add diethylene glycol butyl ether dropwise, control the temperature within the range of 45-60°C, finish the dropwise addition in 2 hours, add methyl isobutyl ketone, and then keep stirring for half an hour to confirm that the reaction is complete Finally, take a sample to measure the free NCO content, control the NCO value at 40-8...

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PUM

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Abstract

An anionic electrophoretic water paint is prepared form the epoxy resin-amine additive as adhesive, closed polyisocyanate as cross-linking agent, chain extending agent and film thickness increaser. Its advantages are excellent electrodepositing stability and storage stability, high electrophoretic power and more film thickness.

Description

technical field [0001] The invention relates to a water-based cathodic electrophoretic coating composition and a preparation method thereof. Background technique [0002] Coating conductive substrates with electrophoretic paint (also known as electrodeposition) is a well-known important industrial paint construction method. Electrophoresis of automotive primers has been widely used in the automotive industry. In this method, a conductive object such as a vehicle body is immersed in a coating composition bath of a film-forming polymer aqueous emulsion. In the bath tank, the conductive workpiece is an electrode, and a part of the tank body is an opposite electrode. After direct current is applied, The coating is deposited on the conductive material and dried to obtain a cured coating film. In cathodic electrophoresis, the electrode being coated is the cathode and the opposite electrode is the anode. [0003] Generally, the resin composition in cathodic electrophoretic coatin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/44
Inventor 李文庄林鸣玉曹伯兴
Owner 李文庄
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