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A low-temperature curing cathodic electrophoretic coating and its preparation method and application method

A cathodic electrophoretic coating, low temperature technology, applied in the direction of electrophoretic coating, epoxy resin coating, coating, etc., can solve the problem of high baking temperature

Active Publication Date: 2016-01-06
KEDE CHEM IND SHUNDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the disadvantages of high baking temperature after coating in the prior art, and provide high throwing power, low baking temperature, good corrosion resistance, strong appearance decoration and durability, and can A cathodic electrophoretic coating that satisfies the surface electrophoretic coating of workpieces with rubber, plastic and other structures, and has low-temperature curing during baking, and its preparation method and use method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment one: comprise independently stored cathodic electrophoretic paint emulsion and color paste, the mass ratio of the composition of cathodic electrophoretic paint emulsion and color paste is 1:4; Described cathodic electrophoretic paint emulsion is 30 parts of main body resin, 10 parts of low Add unblocking curing agent, 1 part of high-boiling point alcohol ether co-solvent, 0.5 part of organic acid and / or inorganic acid into the emulsification disperser in turn, stir and mix evenly, and keep the temperature below 40°C; then add 40 parts of deionized water twice Or put it into the emulsification disperser for more than two times for high-speed emulsification for 1 hour, and the emulsification temperature is controlled below 40°C; after the emulsification is completed, the temperature is raised to 50-70°C to extract the emulsion, extract the solvent in the emulsion, and then add it, etc. A large amount of deionized water is filtered with a filter to obtain a self-...

Embodiment 2

[0073] Embodiment two: comprise independently stored cathodic electrophoretic paint emulsion and color paste, the composition ratio of cathodic electrophoretic paint emulsion and color paste is 1:4; Described cathodic electrophoretic paint emulsion is 40 parts of main body resin, 15 parts of low unblocking Add curing agent, 2 parts of high-boiling point alcohol ether co-solvent, 1 part of organic acid and / or inorganic acid into the emulsification disperser and mix evenly. The temperature is controlled below 40°C; Put it into the emulsification disperser more than once for high-speed emulsification for 1 hour, and the emulsification temperature is controlled below 40°C; after the emulsification is completed, raise the temperature to 50-70°C to extract the emulsion, extract the solvent in the emulsion, and then add an equal amount of Deionized water, filtered with a filter to obtain a self-emulsifying emulsion with excellent stability. The pH of the cathodic electrophoretic coat...

Embodiment 3

[0096] Embodiment three: comprise independently stored cathodic electrophoretic paint emulsion and color paste, the composition ratio of cathodic electrophoretic paint emulsion and color paste is 1:4; Described cathodic electrophoretic paint emulsion is that 35 parts of main body resin, 12 parts of low unblocking Curing agent, 1.5 parts of high-boiling point alcohol ether co-solvent, 0.75 parts of organic acid and / or inorganic acid are sequentially added to the emulsification disperser, stirred and mixed evenly, and the temperature is controlled below 40 ° C; then 45 parts of deionized water Put it into the emulsification disperser more than once for high-speed emulsification for 1 hour, and the emulsification temperature is controlled below 40°C; after the emulsification is completed, raise the temperature to 50-70°C to extract the emulsion, extract the solvent in the emulsion, and then add an equal amount of Deionized water, filtered with a filter to obtain a self-emulsifying...

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Abstract

The invention relates to a low-temperature cured cathode electrophoretic coating. The coating comprises cathode electrophoretic coating emulsion and color paste which are stored independently, wherein the composition ratio of cathode electrophoretic coating emulsion to color paste is 1:4. The cathode electrophoretic coating emulsion is prepared in such a way that 30-40 parts of matrix resin, 10-15 parts of low-deblocking curing agent, 1-2 parts of high boiling point alcohol ether cosolvent, and 0.5-1 part of organic acid and / or mineral acid are added into an emulsifying disperser in sequence for stirring and mixing uniformly, and the temperature is controlled under 40 DEG C; and then 40-50 parts of deionized water is added into the emulsifying disperser in twice or more times for high-speed emulsification for one hour. The coating and the preparation method thereof have the advantages as follows: low-temperature dissociation of blocked isocyanate is realized; low-temperature curing performance and coating stability are combined; low-temperature curing performance and coating surface smoothness are combined; and the curing temperature is as low as 140 DEG C.

Description

technical field [0001] The invention relates to an electrophoretic coating, in particular to a cathodic electrophoretic coating cured at low temperature and its preparation method and application method. Background technique [0002] Cathodic electrophoretic coating is a new type of anti-corrosion coating developed in the mid-1970s and applied industrially. The baking temperature range of traditional cathodic electrophoretic coating is generally 170-180 °C. At present, many industrial workpieces are made of rubber, plastic and other materials, which are required to be dried together with electrophoretic coating after processing, so as to reduce the operating intensity of workers and control costs. However, such materials are easily deformed or melted when baked under high temperature conditions. In order to meet the needs of this type of process, there are very few varieties of low-temperature curing cathodic electrophoretic coatings on the market. Low-temperature curing c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D17/00C09D5/44C08G59/62C08G59/40C08G59/14
Inventor 李文庄高睿何愿文陈立志黄小勇梁立南
Owner KEDE CHEM IND SHUNDE
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