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Method for preparing environment-friendly black low-temperature curing cathode electrophoresis coating

A cathodic electrophoretic coating, an environmentally friendly technology, used in electrophoretic coatings, polyurea/polyurethane coatings, coatings, etc., can solve problems such as the inability to meet the development of coating coatings, and achieve the effect of good curing degree and strong corrosion resistance

Active Publication Date: 2012-10-24
HAOLISEN COATING SHANGHAI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the restrictions of environmental regulations, lead-containing electrophoretic coatings can no longer meet the development of coatings.

Method used

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  • Method for preparing environment-friendly black low-temperature curing cathode electrophoresis coating
  • Method for preparing environment-friendly black low-temperature curing cathode electrophoresis coating
  • Method for preparing environment-friendly black low-temperature curing cathode electrophoresis coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] The present invention will be further described below in conjunction with specific examples.

[0044] 1. Preparation of emulsion

[0045] Preparation of curing agent system

[0046] Put 100g of toluene diisocyanate and 5g of methyl isobutyl ketone into a four-necked flask with a condenser, nitrogen protection and reflux device, and raise the temperature to 65°C; add 51g of methyl ethyl ketone oxime dropwise between 65-75°C, and isocyanate Control the acid value to 160; add 29g of ethylene glycol methyl ether, heat up to 120°C after adding, keep warm for 2h, control the isocyanate value to 28±1, drop the temperature to 100°C, add 15g of trimethylolpropane, stir After 30 minutes, add 17g of methyl isobutyl ketone for dilution, control the isocyanate value below 1, and control the solid content of the curing agent to 90%.

[0047] Preparation of ketimine

[0048] Mix 134g of triethylenetetramine and 180g of methyl isobutyl ketone evenly, then raise the temperature to 12...

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Abstract

The invention relates to the technical field of electrophoresis coatings, in particular to a method for preparing an environment-friendly black low-temperature curing cathode electrophoresis coating. The method is characterized by comprising the following steps of: blending 55 percent of color paste and 35 percent of emulsion together in a mass ratio of 1:4, adding deionized water in the same mass of the coating into the mixture, and circulating the solution for 48 hours to obtain the electrophoresis coating. Compared with the prior art, the method has the advantages that: the curing degree is good; after baking at 120 DEG C per 20 minutes is finished, the actually measured GEL is 95.5 percent (the standard GEL in the electrophoresis coating industry is more than 90 percent, namely dryness), and the traditional electrophoresis coating can reach 90 percent of GEL value when the baking temperature is over 170 DEG C; and the electrophoresis coating has strong corrosion resistance, and the yellowing resistance of the electrophoresis coating is superior to that of the traditional lead-containing electrophoresis coating.

Description

technical field [0001] The invention relates to the technical field of electrophoretic coatings, in particular to a preparation method of an environment-friendly black low-temperature curing cathodic electrophoretic coating. Background technique [0002] Traditional cathodic electrophoretic coatings use various types of lead-containing curing catalysts, among which the combination of fatty acid lead and lead acetate has an ideal catalytic effect. Lead acetate is a water-soluble lead, which can be used as a water-soluble curing catalyst, and can be hydrolyzed and combined with acid as a neutralizer for pigment dispersion resins, which can promote curing and neutralization; as a curing accelerator, lead fatty acid can improve the resistance of the coating film. Dry spot performance; Lead in the coating film can also improve the corrosion resistance of the coating film. But lead is one of the most serious environmental pollutants. Due to the restriction of environmental prote...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/08C09D7/12C09D5/44
Inventor 赵颖祁康雷周贤刘薇薇范俊华凌国成康佳苏献兰
Owner HAOLISEN COATING SHANGHAI
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