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Cathode electrophoretic paint containing environmental-friendly type drier and preparation and use method thereof

A composite drier, cathodic electrophoresis technology, applied in driers, chemical instruments and methods, electrophoretic coatings, etc., can solve problems such as unenvironmental protection and high toxicity

Inactive Publication Date: 2014-08-06
GUANGDONG KODEST EP SC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The organic lead and tin catalysts commonly used in cathodic electrophoretic coatings have been restricted in Europe and developed countries due to the disadvantages of high toxicity and environmental protection.

Method used

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  • Cathode electrophoretic paint containing environmental-friendly type drier and preparation and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of a cathodic electrophoretic paint containing an environment-friendly composite drier, comprising the steps of:

[0032] S1, preparation of curing agent

[0033] Take isocyanate and ethanol with a quantitative molar ratio of 1:1.1 and incubate at 40°C for 1 hour, then incubate at 70°C for more than 2 hours until the NCO value is less than 0.1 to generate a blocked isocyanate curing agent;

[0034] S2. Preparation of composite drier

[0035] Mix oxalic acid and deionized water at a ratio of 1:10 and pre-mix at 60°C for 1 hour, add 1 part of catalyst in batches under stirring, and react at 70°C for 4 hours, and finally remove the precipitate Filter it out to make a water-soluble composite drier, and the catalyst is zinc oxide;

[0036] S3, preparation of main body resin

[0037] S3-1, the macromolecular epoxy resin and the imidium amine compound are reacted at a temperature of 70° C. for 1 hour at a molar ratio of 1:0.5 to prepare a partially ring...

Embodiment 2

[0058] A preparation method of a cathodic electrophoretic paint containing an environment-friendly composite drier, comprising the steps of:

[0059] S1, preparation of curing agent

[0060] Take the isocyanate and cyclohexanone oxime at a quantitative molar ratio of 1:1.1 and incubate at 60°C for 3 hours, then at 80°C for more than 2 hours, until the NCO value is less than 0.1, and generate a blocked isocyanate curing agent;

[0061] S2. Preparation of composite drier

[0062] Take citric acid and deionized water and mix them in a ratio of 1:1 and pre-mix at 80°C for 1 hour, add 10 parts of catalyst in batches under stirring, into the above mixture, react at 90°C for 10 hours, and finally add The precipitate is filtered out to obtain a water-soluble composite drier, and the catalyst is yttrium oxide;

[0063] S3, preparation of main body resin

[0064] S3-1, the macromolecular epoxy resin and the imidium amine compound are reacted at a temperature of 80° C. for 2 hours at ...

Embodiment 3

[0076] A preparation method of a cathodic electrophoretic paint containing an environment-friendly composite drier, comprising the steps of:

[0077] S1, preparation of curing agent

[0078] Take the isocyanate and diethylene glycol butyl ether at a quantitative molar ratio of 1:1.1 and incubate at 50°C for 2 hours, and then at 75°C for more than 2 hours until the NCO value is less than 0.1 to form a blocked isocyanate curing agent;

[0079] S2. Preparation of composite drier

[0080] Take hydroxysulfonic acid and deionized water and mix them at a ratio of 1:2 and pre-mix them at 70°C for 1 hour, then add 5 parts of catalyst in batches under stirring, into the above mixture, react at 80°C for 7 hours, and finally Filter out the precipitate to obtain a water-soluble composite drier, and the catalyst is zinc hydroxide;

[0081] S3, preparation of main body resin

[0082] S3-1, the macromolecular epoxy resin and the butyl amine compound are reacted at a temperature of 75° C. f...

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Abstract

The invention discloses cathode electrophoretic paint containing an environmental-friendly type drier and a preparation method of the pain. The preparation method comprises the following steps: preparing a curing agent, preparing a composite drier, preparing a main body resin, preparing cathode electrophoretic paint emulsion, preparing color paste, subsequently mixing the color paste, the cathode electrophoretic paint emulsion and the deionzed water according to a ratio of 1:(3-5):4, adjusting the content of the paint working liquid solid to be 15-30%, and circulating for 48 hours so as to obtain the cathode electrophoretic paint containing the environmental-friendly type drier. A painted article, which is applicable to the electrophoretic coating method, only needs to be conductive and has no other limit. The electrophoretic paint disclosed by the invention is simple to prepare and good in storage stability and does not need to be dispersed in a sanding manner. The prepared cathode electrophoretic paint is good in flowability and good in surface effect.

Description

technical field [0001] The invention relates to an electrophoretic paint, in particular to a cathodic electrophoretic paint containing an environment-friendly composite drier, a preparation method and a use method thereof. Background technique [0002] Since cathodic electrophoretic coating technology was successfully applied to industrialization in the 1970s, the research on cathodic electrophoretic coatings at home and abroad has become more mature, and the application fields are also expanding, especially in the automotive industry. The replacement rate of cathodic electrophoresis instead of anode electrophoresis exceeds 95%, which is another revolution in the development of automotive coatings. In many fields such as home appliances, bicycles and handicrafts, cathodic electrophoretic coatings also show great development potential in the competition of energy saving, ecology and economics. In the future development, cathodic electrophoretic coatings will continue to deve...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D5/44C09D7/12C08G18/58C09F9/00
Inventor 李文庄高睿何愿文陈立志黄小勇梁立南
Owner GUANGDONG KODEST EP SC CO LTD
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