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Negative electrode electrophoretic paint color paste and preparation method thereof

A cathodic electrophoresis and color paste technology, which is applied in the direction of pigment paste, etc., can solve the problems of cathodic electrophoretic paint film surface blooming, carbon black is not easy to disperse, and affects the rendering effect of cathodic electrophoretic paint

Inactive Publication Date: 2017-08-08
湖北同邦达科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, black cathodic electrophoretic paint color paste is usually realized by adding carbon black, but carbon black is not easy to disperse in the color paste and has the disadvantage of uneven dispersion, which leads to blooming of the cathodic electrophoretic paint film surface, which greatly affects the cathodic electrophoretic paint. rendering effect

Method used

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preparation example Construction

[0022] In the prior art, black cathodic electrophoretic paint color paste is usually realized by adding carbon black, but carbon black is not easy to disperse in the color paste and has the disadvantage of uneven dispersion, which causes the surface of the cathodic electrophoretic paint film to bloom, which greatly affects the cathodic electrophoretic paint. rendering effect. In order to overcome the above-mentioned problems existing in the prior art, a kind of preparation method of cathodic electrophoretic paint color paste of the present invention comprises: mixing castor oil type grinding resin, ethylene glycol butyl ether, ethylene glycol and butanol evenly to obtain a mixed solution, Carbon black is added into the mixed solution and soaked for a certain period of time to obtain pretreated carbon black.

[0023] It should be noted that, by fully soaking carbon black with castor oil type grinding resin, ethylene glycol butyl ether, ethylene glycol and butanol, the present i...

Embodiment 1

[0047] Mix 23 parts of castor oil-type grinding resin, 2 parts of ethylene glycol butyl ether, 1 part of ethylene glycol, and 1 part of butanol evenly to obtain a mixed solution, add 6 parts of carbon black to the mixed solution and soak for 12 hours to obtain carbon black pulp;

[0048] Mix 2 parts of hydroxycellulose with 8 parts of deionized water to make a hydroxycellulose solution with a mass fraction of 20%;

[0049] Mix carbon black slurry and hydroxycellulose solution, and pour 3 parts of iron oxide black, 0.1 part of dispersing aid, 15 parts of kaolin and 0.1 part of substrate wetting agent, stir evenly and grind to a fineness of 15 μm, continue pouring Add deionized water, adjust the solid content to 40%, and obtain the cathodic electrophoretic paint color paste.

Embodiment 2

[0051] Mix 28 parts of castor oil-type grinding resin, 5 parts of ethylene glycol butyl ether, 3 parts of ethylene glycol, and 3 parts of butanol to obtain a mixed solution, add 10 parts of carbon black to the mixed solution and soak for 12 hours to obtain carbon black pulp;

[0052] Mix 10 parts of hydroxycellulose with 40 parts of deionized water to make a hydroxycellulose solution with a mass fraction of 20%;

[0053] Mix carbon black slurry and hydroxycellulose solution, and pour 10 parts of iron oxide black, 0.3 parts of dispersing aid and 0.3 parts of substrate wetting agent, stir evenly and grind to a fineness of 15 μm, continue to pour in deionized water Adjust the solid content to 40% to obtain the cathodic electrophoretic paint color paste.

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Abstract

The invention provides negative electrode electrophoretic paint color paste and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing castor oil grinding resin, butyl cellosolve, ethylene glycol and butyl alcohol to obtain a mixed solution; adding carbon black into the mixed solution, and soaking for a certain time to obtain pretreated carbon black; adding hydroxypropyl-cellulose, ferric oxide black and kaolin, dispersing and grinding to obtain carbon-black paste. In the preparation method, the carbon black is soaked fully in the castor oil grinding resin, the butyl cellosolve, the ethylene glycol and the butyl alcohol, so that the carbon black can be adsorbed on the surface of the grinding resin better, and the stability of colored paint is improved; after the hydroxypropyl-cellulose is added, the solid content of the color paste can be lowered on the basis of keeping original color paste viscosity, the oil absorbency of a pigment filler is lowered, and the settleability of the negative electrode electrophoretic paint color paste is enhanced; by adding the ferric oxide black, the using amount of the carbon black can be lowered, and meanwhile the salt fog resistance of a paint film is enhanced.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a cathodic electrophoretic paint color paste and a preparation method thereof. Background technique [0002] Since the 1970s, cathodic electrophoretic paint began to be applied industrially, because of its excellent corrosion resistance and excellent mechanical properties, it has been widely used and popularized in the automotive industry. [0003] In the prior art, black cathodic electrophoretic paint color paste is usually realized by adding carbon black, but carbon black is not easy to disperse in the color paste and has the disadvantage of uneven dispersion, which causes the surface of the cathodic electrophoretic paint film to bloom, which greatly affects the cathodic electrophoretic paint. rendering effect. Contents of the invention [0004] The present invention provides a method for preparing cathodic electrophoretic paint color paste which overcomes the above problem...

Claims

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Application Information

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IPC IPC(8): C09D17/00
CPCC09D17/002C09D17/005
Inventor 周雪科徐明兵
Owner 湖北同邦达科技有限公司
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