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Thermosetting two-component coating composition and coated articles

A two-component coating, thermosetting technology, applied in the coating and other directions, to achieve the effect of stable extinction and excellent coating stability

Inactive Publication Date: 2015-03-25
KANSAI PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the coating compositions of Patent Documents 1 to 3 have problems in any one of low-temperature curing properties, finishing properties, coating film hardness, matte coating film stability, water resistance, corrosion resistance, and weather resistance, and are insufficient. To solve the problems existing in the prior art

Method used

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  • Thermosetting two-component coating composition and coated articles
  • Thermosetting two-component coating composition and coated articles
  • Thermosetting two-component coating composition and coated articles

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0092] The preparation of preparation example 1 acrylic resin No.1 solution

[0093] 28 parts of SWASOLVE 1000 (manufactured by COSMO Petroleum Co., Ltd., aromatic hydrocarbon solvent), 85 parts of toluene, 41.6 parts of styrene, 6.9 parts of n-butyl acrylate, 19 parts of isobutyl methacrylate, PLACCEL FM 3 ( Note 1) 15 parts, 17 parts of 2-hydroxyethyl methacrylate, 0.5 parts of acrylic acid, and 8 parts of di-tert-butyl hydroperoxide were reacted at 110°C under nitrogen to obtain an acid value of 3.9 mgKOH / g and a hydroxyl value of 94.9 mgKOH / g. Acrylic resin No.1 with a weight average molecular weight of 11,000.

[0094] (Note 1) PLACCEL FM 3: manufactured by DIACEL Chemical Industry Co., Ltd., brand name, ε-caprolactone-modified vinyl monomer of 2-hydroxyethyl acrylate.

[0095] Preparation Examples 2-4 Acrylic Resin No.2-No.4

[0096] Acrylic resins No. 2 to No. 4 were obtained in the same manner as in Preparation Example 1 except that the monomer mixture of the compon...

preparation example 5

[0099] Preparation Example 5 Preparation Example of Pigment Dispersion Paste No.1

[0100] Mix 1100 parts of acrylic resin No. 1100 (60 parts of solid content), 5 parts of Monarch 1300 (Note 2), 100 parts of LAKABAR SF (Note 3), and MIZUKASIL P-526 (Note 8) obtained in Preparation Example 1. ) 10 parts, the solid content was adjusted with SWASOLVE 1000 (manufactured by COSMO Petroleum Co., Ltd., aromatic hydrocarbon solvent), put into a ball mill and stirred for 6 hours to obtain pigment dispersion paste No. 1 with a solid content of 60%.

[0101] Preparation Example 6~15 Preparation Example of Pigment Dispersion Paste No.2~No.11

[0102] Pigment dispersion pastes No. 2 to No. 11 were obtained in the same manner as in Preparation Example 5 except that the content of the compounding ratio in Table 2 was adopted.

[0103] Table 2

[0104]

[0105]

[0106] ( ) indicates solid content

[0107] (Note 2) Monarch 1300: manufactured by Cabot Corporation, trade name, carbon b...

Embodiment 1

[0115] Embodiment 1 coating composition No.1

[0116] Mix Acrylic Resin No. 119 parts (solid content) obtained in Preparation Example 1, Sumidur N3300 (Note 9) 21 parts (solid content), Pigment Dispersion Paste No. 1175 parts (solid content) obtained in Preparation Example 5, BYK -410 (Note 11) 0.8 part was adjusted to 60 mass % of solid content, and the coating composition No. 1 was obtained.

[0117] Embodiment 2~14 coating composition No.2~No.14

[0118] Except having used the compounding content of Table 3, it carried out similarly to Example 1, and obtained the coating composition No.2-No.14 of 60 mass % of solid content. The results obtained by performing tests according to the following "production of test panels" are also given.

[0119] table 3

[0120]

[0121]

[0122] The value in the ratio table indicates the solid content

[0123] (Note 9) Sumidur N3300: manufactured by Sumika Bayer Polyurethane Co., Ltd., trade name, trimeric isocyanate body of 1,6-hex...

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Abstract

A coating composition which is excellent in a low temperature solidification, finishing property, coating film hardness, matting coating stability, water resistance, corrosion resistance and weather resistance and coated articles are provided. The coating composition is a thermosetting two-component coating composition containing a hydroxyl-containing resin (A), polyisocyanate compound (B), barium sulfate (C) with an average particle diameter of 1.0-15 micron, silica fine particles (D) and a rheological modifier (E); wherein, based on 100 parts by mass of the total solid content of the hydroxyl-containing resin (A) and the polyisocyanate compound, the content of the hydroxyl-containing resin (A) is 60 parts to 90 parts by mass, the content of the polyisocyanate compound (B) is 10 parts to 40 parts by mass, the content of the barium sulfate (C) is 1 part to 150 parts by mass, the content of the silica fine particles (D) is 0 .1 parts to 30 parts by mass, and the content of the rheological modifier (E) is 0.1 parts to 20 parts by mass.

Description

technical field [0001] The present invention relates to a thermosetting two-component coating composition and a coated article excellent in low-temperature curability, finishing property, coating film hardness, gloss stability of matte coating film, water resistance, corrosion resistance and weather resistance. Background technique [0002] Recently, various coating compositions have been used for coating construction machines such as bulldozers, hydraulic excavators, and wheel loaders, or industrial machines. However, when the coating film is dried by construction machines or industrial machines, there are problems such as: (1) the heat capacity of the object to be coated is large, the heat of the drying furnace is not sufficiently transmitted, and the curing property is insufficient; There are many parts, and the gloss of the matte coating film is unstable; (3) Because construction machinery or industrial machinery is used outdoors, there are high requirements for coating ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D125/14C09D7/12
Inventor 高桥伸明竹内规人松本和行胜田英明
Owner KANSAI PAINT CO LTD
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