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Multiple-package curable coating material composition, method for forming coating film, and coated article

A curing type and composition technology, applied to the surface coating liquid device, polyurea/polyurethane coating, coating, etc., can solve the problem of poor adhesion, processability, poor physical properties of the coating film, processability, and recoating Solve problems such as poor appearance of permanent coating film, hinder siloxane crosslinking reaction, etc., and achieve the effects of excellent non-adhesiveness, excellent chemical resistance, and excellent adhesion

Inactive Publication Date: 2013-12-18
KANEKA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, although the chemical resistance and non-adhesiveness are improved by increasing the crosslink density, there are problems such as poor adhesion, workability and other physical properties of the coating film.
There is also a method of increasing the glass transition temperature of the resin as a method of ensuring adhesion and processability while improving chemical resistance and non-adhesiveness. If the glass transition temperature is increased, the appearance of the coating film will be poor. It is very difficult to design a curable urethane resin coating that is excellent in chemical resistance, non-adhesiveness, adhesion, processability, and appearance
[0006] On the other hand, although two-component curing type acrylic silicone resin coatings can obtain excellent chemical resistance and non-adhesive properties, compared with two-component curing type polyurethane resin coatings, there are problems in processability and recoating. problem of poor performance and coating appearance
[0007] Therefore, it has been proposed to solve the problems of the conventional two-component curable acrylic silicone resin paint by adding an isocyanate compound to the two-component curable acrylic silicone resin paint (for example, refer to Patent Document 1), but Using an organometallic compound as a curing reaction catalyst, in this case, for the urethane crosslinking reaction between the hydroxyl group in the acrylic silicone resin and the isocyanate compound and the alkoxysilyl group in the acrylic silicone resin The siloxane crosslinking reaction, the urethane crosslinking reaction occurs first, so the siloxane crosslinking reaction is hindered, and there is a delay in the development of the excellent chemical resistance and non-adhesive properties of the siloxane crosslinking And other issues

Method used

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  • Multiple-package curable coating material composition, method for forming coating film, and coated article
  • Multiple-package curable coating material composition, method for forming coating film, and coated article
  • Multiple-package curable coating material composition, method for forming coating film, and coated article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0104] The present invention will be described below based on examples, but the present invention is not limited thereto.

Synthetic example 1

[0105] (Synthesis Example 1: Synthesis of Vinyl Copolymer (A) Having a Hydroxyl Group)

[0106] Put the component (B) shown in Table 1 in a container equipped with a stirrer, a reflux cooler, a nitrogen gas introduction tube, and a dropping funnel, and after raising the temperature to 110°C while introducing nitrogen gas, add the component (A) in Table 1 The mixture was added dropwise from the dropping funnel at constant speed for 5 hours. Next, the liquid mixture of (C)component was dripped at a constant speed over 1 hour. Then, after stirring at 110 degreeC for 2 hours, it cooled to room temperature. Finally, the (D) component of Table 1 was added and stirred.

[0107] [Table 1]

[0108]

[0109] V-59: Manufactured by Wako Pure Chemical Industries, Ltd., 2,2'-azobis(2-methylbutyronitrile) (combination examples 1 to 8: preparation of curing agent)

[0110] Prepare a curing agent according to the formulation shown in Table 2.

[0111] In compounding example 3 and compo...

Embodiment 1～4

[0113] (Examples 1-4, Comparative Examples 1-10)

[0114] When coating, prepare a coating solution according to the formulations shown in Table 3 and Table 4, and apply it to ABS resin molded boards and polycarbonate molded boards by air jet coating method so that the dry film thickness becomes 10 to 15 μm. It dried at 80 degreeC for 30 minutes, the coating film was formed, and the evaluation of the coating film was performed by the following method.

[0115]

[0116] (Evaluation of coating film)

[0117] With respect to the coating films formed in Examples 1 to 4 and Comparative Examples 1 to 10, ethanol rubbing resistance, non-tackiness, bendability, substrate adhesion, and appearance were evaluated. Among them, ethanol rubbing resistance, non-adhesiveness, bendability, and appearance were evaluated with ABS resin molded boards, and substrate adhesion was evaluated with polycarbonate molded boards. The results are shown in Table 5.

[0118] (Evaluation of ethanol rubbi...

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PUM

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Abstract

The purpose of the present invention is to provide a multiple-package curable coating material composition which is capable of forming a coating film that has excellent chemical resistance, excellent non-adhesiveness, good adhesion, good processability and good appearance at the same time. A multiple-package curable coating material composition of the present invention is composed of (1) an acrylic resin coating material and (2) a curing agent. This multiple-package curable coating material composition is characterized in that: (1) the acrylic resin coating material has a coating film-forming component that contains a vinyl copolymer (A) having a hydroxyl group, and the vinyl copolymer (A) having a hydroxyl group additionally has a hydrolyzable silyl group; and (2) the curing agent contains an isocyanate compound (B) and a cyclic tertiary amine compound (C) that does not have an active hydrogen group.

Description

technical field [0001] The present invention relates to a multi-liquid curable coating composition having good adhesion to plastic substrates, chemical resistance, non-adhesiveness, processability, and excellent coating film appearance. A method for forming a coating film of a curable coating composition and a coated object coated with the above-mentioned multi-liquid curable coating composition. Background technique [0002] Acrylic lacquer coatings, two-component curing type urethane resin coatings, two-component curing type acrylic silicone resin coatings, and the like have been used so far for the purpose of protecting plastic molded products and imparting design properties. [0003] Acrylic paints are one-component paints that do not involve crosslinking reactions of resins, and are easy to handle without the trouble of compounding a curing agent. However, the resulting paint films are inferior in chemical resistance and the like. [0004] In addition, the two-componen...

Claims

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Application Information

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IPC IPC(8): C09D133/14B05D7/24C09D7/12C09D143/04C09D175/04C09D183/06
CPCB05D7/52B05D2502/00B05D2507/00C08G18/2063C08G18/6225C08G18/7657C09D143/04C09D175/04B05D7/24C09D133/14C09D183/06
Inventor 塚尾淳司
Owner KANEKA CORP
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