Cathode electrophoretic coating composition and preparation method thereof

A cathodic electrophoretic coating and composition technology, which can be applied to electrophoretic coatings, polyurea/polyurethane coatings, coatings, etc., can solve problems such as affecting the appearance of coating and yellowing of the upper coating.

Inactive Publication Date: 2010-06-30
上海金力泰化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of paint film is attached to the phosphating conversion film and has a strong anti-corrosion function. However, because the early cathodic electrophoretic paint for automotive coating usually contains a large number of double bond structures and low-molecular isocyanate blockers, it is difficult to withstand UV rays. It is easy to pulverize under the light, and cause yellowing of the top coating, which affects the appearance of the coating

Method used

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  • Cathode electrophoretic coating composition and preparation method thereof
  • Cathode electrophoretic coating composition and preparation method thereof
  • Cathode electrophoretic coating composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1-A

[0045] Preparation Example 1-A: Preparation of Cycloaliphatic Resin

[0046] The composition of each raw material is shown in the table below:

[0047]

[0048] * Polyether 210: produced by Shanghai Gaoqiao Petrochemical

[0049] Preparation process: Put 197.32g of hexahydrophthalic anhydride, 49.01g of xylene, and 210751.88g of polyether into a 2000ml reaction bottle, heat to 130-140°C, and carry out the compounding until the mixture becomes a uniform liquid state; quickly add triethyl Put 1.79g of amine into the reaction bottle; control the temperature at 130-140°C, and carry out the esterification reaction, which takes about 3-4 hours; check the acid value, when the acid value reaches 75±5mgKOH / g, the reaction is complete, and the material is discharged for later use .

preparation example 1-B

[0050] Preparation Example 1-B: Preparation of Cycloaliphatic Resin

[0051] The composition of each raw material is shown in the table below:

[0052]

[0053] Preparation process: Put 398.26g of IPDI, 100.32g of methyl isobutyl ketone, and 0.04g of phosphoric acid solution into a 2000ml reaction bottle, and heat and stir with nitrogen; Adding time is 2-3 hours, keep the reaction temperature of the material at 50-60°C during the dropwise addition, keep warm for 2 hours after the dropwise addition is completed; Hours; detection - NCO value, when the NCO value ≤ 2mg / g, the reaction is complete, and the material is discharged for later use.

preparation example 1-C

[0054] Preparation Example 1-C: Preparation of Cycloaliphatic Resin

[0055] The composition of each raw material is shown in the table below:

[0056]

[0057] Preparation process: Put 1000.00g of IPDI, 176.66g of methyl isobutyl ketone and 0.60g of dibutyltin dilaurate into a 2000ml reaction bottle; raise the temperature to 50°C, add 589.30g of isooctyl alcohol dropwise evenly, and the dropwise addition is completed Finally, keep warm for 3 hours; check the NCO value, when the NCO value=104-110mg / g, the reaction is complete, and the material is discharged in a clean, dry and well-sealed container for subsequent use.

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Abstract

The invention relates to a cathode electrophoretic coating composition and a preparation method thereof, wherein the cathode electrophoretic coating composition contains the following components of: a component A comprising water-dispersing emulsion in which cycloaliphatic resin is added, wherein the water-dispersing emulsion accounts for 70-90 parts of the total weight of the composition; and a component B comprising colorant in which cycloaliphatic resin is added, wherein the colorant accounts for 10-30 parts of the total weight of the composition; and the cycloaliphatic resin is selected from an esterified reaction product of hexahydro-anhydride and C1-10 alkyl alcohol or alcohol ether and a closure of isophorone diisocyanate. The invention also provides a method for preparing the cathode electrophoretic coating composition.

Description

technical field [0001] The invention belongs to the field of chemical coatings and relates to a novel electrodepositable cathodic electrophoretic coating composition. Specifically, the present invention relates to a two-component cathodic electrodeposition coating composition consisting of an emulsion and a color paste, wherein an alicyclic resin is contained in the emulsion and the color paste components. The invention also relates to a process for the preparation of the composition. Background technique [0002] Cathodic electrophoretic coatings (cationic electrodeposition coatings) are favored for their excellent corrosion resistance, high throwing power, low solvent content construction, and high coating efficiency. They have developed rapidly since their inception in the 1970s. It is widely used in industrial coating (see US 3,984,299, US 5,074,979, US 4,009,133, US 4,423,166 and US 5,348,578), not only for the coating of automobile bodies, but also for the coating of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D5/44
Inventor 吴幼伟冯艳刚杭莱莱王春明潘元佳张继江袁建中戚乔乔王伟栋蔡志强
Owner 上海金力泰化工股份有限公司
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