Method for producing anionic extinction deposition coating composition having high flash point

An anionic, manufacturing method technology, applied in electrophoretic coatings, coatings, etc., can solve the problems of dangerous goods, increase transportation costs and storage costs, and achieve the effect of increasing flash point and reducing transportation and storage.

Inactive Publication Date: 2020-06-12
SHINTO PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since this paint composition uses a large amount of a specific solvent with a low flash point such as isopropyl alcohol in the synthesis of the main component of the water-based acrylic resin, it is considered a dangerous product with a flash point of 60°C or lower. Dealing with the problem
Therefore, for example, the coating composition is treated as dangerous goods according to Chinese laws and regulations, and special conditions are required to be met during the transportation and storage of the coating composition. As a result, the coating composition has a problem of increasing transportation costs and storage costs.

Method used

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  • Method for producing anionic extinction deposition coating composition having high flash point
  • Method for producing anionic extinction deposition coating composition having high flash point
  • Method for producing anionic extinction deposition coating composition having high flash point

Examples

Experimental program
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Embodiment

[0062] Hereinafter, the present invention will be explained in more detail with examples, but the present invention is not limited to these. In addition, unless otherwise specified, the compounding amount (parts, %) in the table means parts by mass and% by mass.

[0063] ((A) Production of vinyl copolymer)

manufacture example 1

[0064] Manufacturing example 1 (manufacturing of resin liquid A1)

[0065] Prepare a reaction device with a stirring device, a thermometer, a monomer dropping device, and a reflux condenser.

[0066] The (1) in Table 1 was put into a reaction device, the reflux temperature was raised with stirring, and (6) to (13) were uniformly mixed in advance, and then added dropwise over 3 hours. The temperature is maintained at the reflux temperature.

[0067] After 1.5 hours had passed from the end of the dropping, (14) was added, and the reaction was continued at the same temperature for 1.5 hours to obtain a resin liquid A1 for a transparent and viscous matte coating with a solid content of 65%.

[0068] The acid value (KOHmg / g solid content), hydroxyl value (KOHmg / g solid content), equivalent of alkoxysilyl group (meq / g solid content), Tg (°C), and weight average molecular weight of the resin liquid are also shown in Table 1.

manufacture example 2～9

[0069] Manufacturing examples 2-9 (manufacturing of resin liquid A2-A9)

[0070] Except having adopted the compounding amounts described in Table 1, the same method as in Production Example 1 was used to produce resin liquids A2 to A9.

[0071] In addition, for resin liquid A8 (for Comparative Example 2) using only ethylene glycol monobutyl ether as a solvent, and resin liquid A9 (for Comparative Example 3) using only propylene glycol monomethyl ether as a solvent, During the resin reaction, the resin gelled and became a gel, and the resin liquid could not be produced.

[0072]

[0073] (Manufacture of dispersion B1)

[0074] Prepare a reaction device with a stirring device, a thermometer, a deionized water dripping device, and a reflux condenser.

[0075] According to the compounding quantity shown in Table 2, (1) and (8) were put into a reaction apparatus, and it stirred and mixed at 60 degreeC for 1 hour. The mixed liquid of (9) and (10) was slowly added thereto and dispersed in wa...

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Abstract

Provided is a method for producing an anionic extinction deposition coating composition having a high flash point, the present invention can impart high coating workability and an excellent coating film state. The method comprises the following steps: carrying out copolymerization on (a) alpha,beta-alkene unsaturated monomer, (b) a hydroxyl group-containing alpha,beta-alkene unsaturated monomer, (c) an alpha,beta-alkene unsaturated monomer containing an alkoxysilyl group as a crosslinking functional group, and (d) other alpha,beta-alkene unsaturated monomer in the presence of a solvent containing 50% by mass or more of at least one alcohol selected from the group consisting of isopropanol, n-propanol and tert-butanol to obtain a resin solution in which (A) a vinyl copolymer is dissolved inthe solvent; carrying out water dispersion on the resin liquid and (B) amino resin to obtain a dispersion liquid; gelatinizing the dispersion liquid; and desolventizing the dispersion liquid by decompressing the system. Preferably, the composition further contains an organosilicon surfactant, wherein the temperature and time of the gelatinization step are 45-85 DEG C and 1.5-9 hours respectively,and the temperature, time and pressure reduction degree of the desolvation step are 45 to 85 DEG C, 45 min to 4.5 hours and -0.025 to -0.075 MPa respectively.

Description

Technical field [0001] The present invention relates to a method for manufacturing an anionic matte (matte) electrodeposition coating composition suitable for the coating of aluminum building materials, in particular to an anionic matte (matt) electrodeposition coating composition that can increase the flash point and is not treated as a hazardous material The manufacturing method of the thing. Background technique [0002] In the past, anodized aluminum materials have been widely used in building materials related fields such as window frames, doors, and appearances of buildings and houses due to their light weight, high strength, and excellent corrosion resistance. The coating of aluminum generally uses a single-layer anionic extinction coating with good appearance. [0003] As the anionic matte deposition coating, representatively, it is a coating composition obtained by mixing an amino resin such as a melamine resin as a crosslinking agent with an aqueous acrylic resin contain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/08C09D161/28C09D5/44C08F220/18C08F220/14C08F212/08C08F220/20C08F220/06C08F230/08C08F2/06
CPCC08F2/06C08F220/18C09D5/4473C09D143/04C08L61/28
Inventor 小田真浅田浩纪广田胜亮井上晋一
Owner SHINTO PAINT CO LTD
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